.. default-domain:: lua .. highlight:: lua .. currentmodule:: SpaceCenter .. _lua-api-parts: Parts ===== The following classes allow interaction with a vessels individual parts. .. contents:: :local: Parts ----- .. class:: Parts Instances of this class are used to interact with the parts of a vessel. An instance can be obtained by calling :attr:`SpaceCenter.Vessel.parts`. .. attribute:: all: List A list of all of the vessels parts. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: root: SpaceCenter.Part The vessels root part. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. note:: See the discussion on :rst:ref:`lua-api-parts-trees-of-parts`. .. attribute:: controlling: SpaceCenter.Part The part from which the vessel is controlled. :Attribute: Can be read or written :rtype: :class:`SpaceCenter.Part` .. method:: with_name(name) A list of parts whose :attr:`SpaceCenter.Part.name` is *name*. :param string name: :rtype: List .. method:: with_title(title) A list of all parts whose :attr:`SpaceCenter.Part.title` is *title*. :param string title: :rtype: List .. method:: with_tag(tag) A list of all parts whose :attr:`SpaceCenter.Part.tag` is *tag*. :param string tag: :rtype: List .. method:: with_module(module_name) A list of all parts that contain a :class:`SpaceCenter.Module` whose :attr:`SpaceCenter.Module.name` is *module_name*. :param string module_name: :rtype: List .. method:: in_stage(stage) A list of all parts that are activated in the given *stage*. :param number stage: :rtype: List .. note:: See the discussion on :rst:ref:`lua-api-parts-staging`. .. method:: in_decouple_stage(stage) A list of all parts that are decoupled in the given *stage*. :param number stage: :rtype: List .. note:: See the discussion on :rst:ref:`lua-api-parts-staging`. .. method:: modules_with_name(module_name) A list of modules (combined across all parts in the vessel) whose :attr:`SpaceCenter.Module.name` is *module_name*. :param string module_name: :rtype: List .. attribute:: antennas: List A list of all antennas in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. note:: If RemoteTech is installed, this will always return an empty list. To interact with RemoteTech antennas, use the RemoteTech service APIs. .. attribute:: cargo_bays: List A list of all cargo bays in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: control_surfaces: List A list of all control surfaces in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: decouplers: List A list of all decouplers in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: docking_ports: List A list of all docking ports in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: engines: List A list of all engines in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. note:: This includes any part that generates thrust. This covers many different types of engine, including liquid fuel rockets, solid rocket boosters, jet engines and RCS thrusters. .. attribute:: experiments: List A list of all science experiments in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: fairings: List A list of all fairings in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: intakes: List A list of all intakes in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: legs: List A list of all landing legs attached to the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: launch_clamps: List A list of all launch clamps attached to the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: lights: List A list of all lights in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: parachutes: List A list of all parachutes in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: radiators: List A list of all radiators in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: resource_drains: List A list of all resource drains in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: rcs: List A list of all RCS blocks/thrusters in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: reaction_wheels: List A list of all reaction wheels in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: resource_converters: List A list of all resource converters in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: resource_harvesters: List A list of all resource harvesters in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: robotic_hinges: List A list of all robotic hinges in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: robotic_pistons: List A list of all robotic pistons in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: robotic_rotations: List A list of all robotic rotations in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: robotic_rotors: List A list of all robotic rotors in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: sensors: List A list of all sensors in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: solar_panels: List A list of all solar panels in the vessel. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: wheels: List A list of all wheels in the vessel. :Attribute: Read-only, cannot be set :rtype: List Part ---- .. class:: Part Represents an individual part. Vessels are made up of multiple parts. Instances of this class can be obtained by several methods in :class:`SpaceCenter.Parts`. .. attribute:: name: string Internal name of the part, as used in `part cfg files `_. For example "Mark1-2Pod". :Attribute: Read-only, cannot be set :rtype: string .. attribute:: title: string Title of the part, as shown when the part is right clicked in-game. For example "Mk1-2 Command Pod". :Attribute: Read-only, cannot be set :rtype: string .. attribute:: tag: string The name tag for the part. Can be set to a custom string using the in-game user interface. :Attribute: Can be read or written :rtype: string .. note:: This string is shared with `kOS `_ if it is installed. .. attribute:: flag_url: string The asset URL for the part's flag. :Attribute: Can be read or written :rtype: string .. attribute:: highlighted: boolean Whether the part is highlighted. :Attribute: Can be read or written :rtype: boolean .. attribute:: highlight_color: Tuple The color used to highlight the part, as an RGB triple. :Attribute: Can be read or written :rtype: Tuple .. attribute:: cost: number The cost of the part, in units of funds. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: vessel: SpaceCenter.Vessel The vessel that contains this part. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Vessel` .. attribute:: parent: SpaceCenter.Part The parts parent. Returns ``nil`` if the part does not have a parent. This, in combination with :attr:`SpaceCenter.Part.children`, can be used to traverse the vessels parts tree. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. note:: See the discussion on :rst:ref:`lua-api-parts-trees-of-parts`. .. attribute:: children: List The parts children. Returns an empty list if the part has no children. This, in combination with :attr:`SpaceCenter.Part.parent`, can be used to traverse the vessels parts tree. :Attribute: Read-only, cannot be set :rtype: List .. note:: See the discussion on :rst:ref:`lua-api-parts-trees-of-parts`. .. attribute:: axially_attached: boolean Whether the part is axially attached to its parent, i.e. on the top or bottom of its parent. If the part has no parent, returns ``False``. :Attribute: Read-only, cannot be set :rtype: boolean .. note:: See the discussion on :rst:ref:`lua-api-parts-attachment-modes`. .. attribute:: radially_attached: boolean Whether the part is radially attached to its parent, i.e. on the side of its parent. If the part has no parent, returns ``False``. :Attribute: Read-only, cannot be set :rtype: boolean .. note:: See the discussion on :rst:ref:`lua-api-parts-attachment-modes`. .. attribute:: stage: number The stage in which this part will be activated. Returns -1 if the part is not activated by staging. :Attribute: Read-only, cannot be set :rtype: number .. note:: See the discussion on :rst:ref:`lua-api-parts-staging`. .. attribute:: decouple_stage: number The stage in which this part will be decoupled. Returns -1 if the part is never decoupled from the vessel. :Attribute: Read-only, cannot be set :rtype: number .. note:: See the discussion on :rst:ref:`lua-api-parts-staging`. .. attribute:: massless: boolean Whether the part is `massless `_. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: mass: number The current mass of the part, including resources it contains, in kilograms. Returns zero if the part is massless. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: dry_mass: number The mass of the part, not including any resources it contains, in kilograms. Returns zero if the part is massless. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: shielded: boolean Whether the part is shielded from the exterior of the vessel, for example by a fairing. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: dynamic_pressure: number The dynamic pressure acting on the part, in Pascals. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: impact_tolerance: number The impact tolerance of the part, in meters per second. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: temperature: number Temperature of the part, in Kelvin. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: skin_temperature: number Temperature of the skin of the part, in Kelvin. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: max_temperature: number Maximum temperature that the part can survive, in Kelvin. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: max_skin_temperature: number Maximum temperature that the skin of the part can survive, in Kelvin. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: thermal_mass: number A measure of how much energy it takes to increase the internal temperature of the part, in Joules per Kelvin. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: thermal_skin_mass: number A measure of how much energy it takes to increase the skin temperature of the part, in Joules per Kelvin. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: thermal_resource_mass: number A measure of how much energy it takes to increase the temperature of the resources contained in the part, in Joules per Kelvin. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: thermal_conduction_flux: number The rate at which heat energy is conducting into or out of the part via contact with other parts. Measured in energy per unit time, or power, in Watts. A positive value means the part is gaining heat energy, and negative means it is losing heat energy. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: thermal_convection_flux: number The rate at which heat energy is convecting into or out of the part from the surrounding atmosphere. Measured in energy per unit time, or power, in Watts. A positive value means the part is gaining heat energy, and negative means it is losing heat energy. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: thermal_radiation_flux: number The rate at which heat energy is radiating into or out of the part from the surrounding environment. Measured in energy per unit time, or power, in Watts. A positive value means the part is gaining heat energy, and negative means it is losing heat energy. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: thermal_internal_flux: number The rate at which heat energy is begin generated by the part. For example, some engines generate heat by combusting fuel. Measured in energy per unit time, or power, in Watts. A positive value means the part is gaining heat energy, and negative means it is losing heat energy. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: thermal_skin_to_internal_flux: number The rate at which heat energy is transferring between the part's skin and its internals. Measured in energy per unit time, or power, in Watts. A positive value means the part's internals are gaining heat energy, and negative means its skin is gaining heat energy. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: available_seats: number How many open seats the part has. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: resources: SpaceCenter.Resources A :class:`SpaceCenter.Resources` object for the part. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Resources` .. attribute:: crossfeed: boolean Whether this part is crossfeed capable. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: is_fuel_line: boolean Whether this part is a fuel line. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: fuel_lines_from: List The parts that are connected to this part via fuel lines, where the direction of the fuel line is into this part. :Attribute: Read-only, cannot be set :rtype: List .. note:: See the discussion on :rst:ref:`lua-api-parts-fuel-lines`. .. attribute:: fuel_lines_to: List The parts that are connected to this part via fuel lines, where the direction of the fuel line is out of this part. :Attribute: Read-only, cannot be set :rtype: List .. note:: See the discussion on :rst:ref:`lua-api-parts-fuel-lines`. .. attribute:: modules: List The modules for this part. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: antenna: SpaceCenter.Antenna An :class:`SpaceCenter.Antenna` if the part is an antenna, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Antenna` .. note:: If RemoteTech is installed, this will always return ``nil``. To interact with RemoteTech antennas, use the RemoteTech service APIs. .. attribute:: cargo_bay: SpaceCenter.CargoBay A :class:`SpaceCenter.CargoBay` if the part is a cargo bay, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.CargoBay` .. attribute:: control_surface: SpaceCenter.ControlSurface A :class:`SpaceCenter.ControlSurface` if the part is an aerodynamic control surface, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.ControlSurface` .. attribute:: decoupler: SpaceCenter.Decoupler A :class:`SpaceCenter.Decoupler` if the part is a decoupler, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Decoupler` .. attribute:: docking_port: SpaceCenter.DockingPort A :class:`SpaceCenter.DockingPort` if the part is a docking port, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.DockingPort` .. attribute:: engine: SpaceCenter.Engine An :class:`SpaceCenter.Engine` if the part is an engine, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Engine` .. attribute:: experiment: SpaceCenter.Experiment An :class:`SpaceCenter.Experiment` if the part contains a single science experiment, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Experiment` .. note:: Throws an exception if the part contains more than one experiment. In that case, use :attr:`SpaceCenter.Part.experiments` to get the list of experiments in the part. .. attribute:: experiments: List A list of :class:`SpaceCenter.Experiment` objects that the part contains. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: fairing: SpaceCenter.Fairing A :class:`SpaceCenter.Fairing` if the part is a fairing, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Fairing` .. attribute:: intake: SpaceCenter.Intake An :class:`SpaceCenter.Intake` if the part is an intake, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Intake` .. note:: This includes any part that generates thrust. This covers many different types of engine, including liquid fuel rockets, solid rocket boosters and jet engines. For RCS thrusters see :class:`SpaceCenter.RCS`. .. attribute:: leg: SpaceCenter.Leg A :class:`SpaceCenter.Leg` if the part is a landing leg, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Leg` .. attribute:: launch_clamp: SpaceCenter.LaunchClamp A :class:`SpaceCenter.LaunchClamp` if the part is a launch clamp, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.LaunchClamp` .. attribute:: light: SpaceCenter.Light A :class:`SpaceCenter.Light` if the part is a light, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Light` .. attribute:: parachute: SpaceCenter.Parachute A :class:`SpaceCenter.Parachute` if the part is a parachute, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Parachute` .. attribute:: radiator: SpaceCenter.Radiator A :class:`SpaceCenter.Radiator` if the part is a radiator, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Radiator` .. attribute:: resource_drain: SpaceCenter.ResourceDrain A :class:`SpaceCenter.ResourceDrain` if the part is a resource drain, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.ResourceDrain` .. attribute:: rcs: SpaceCenter.RCS A :class:`SpaceCenter.RCS` if the part is an RCS block/thruster, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.RCS` .. attribute:: reaction_wheel: SpaceCenter.ReactionWheel A :class:`SpaceCenter.ReactionWheel` if the part is a reaction wheel, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.ReactionWheel` .. attribute:: resource_converter: SpaceCenter.ResourceConverter A :class:`SpaceCenter.ResourceConverter` if the part is a resource converter, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.ResourceConverter` .. attribute:: resource_harvester: SpaceCenter.ResourceHarvester A :class:`SpaceCenter.ResourceHarvester` if the part is a resource harvester, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.ResourceHarvester` .. attribute:: robotic_controller: SpaceCenter.RoboticController A :class:`SpaceCenter.RoboticController` if the part is a robotic controller, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.RoboticController` .. attribute:: robotic_hinge: SpaceCenter.RoboticHinge A :class:`SpaceCenter.RoboticHinge` if the part is a robotic hinge, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.RoboticHinge` .. attribute:: robotic_piston: SpaceCenter.RoboticPiston A :class:`SpaceCenter.RoboticPiston` if the part is a robotic piston, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.RoboticPiston` .. attribute:: robotic_rotation: SpaceCenter.RoboticRotation A :class:`SpaceCenter.RoboticRotation` if the part is a robotic rotation servo, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.RoboticRotation` .. attribute:: robotic_rotor: SpaceCenter.RoboticRotor A :class:`SpaceCenter.RoboticRotor` if the part is a robotic rotor, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.RoboticRotor` .. attribute:: sensor: SpaceCenter.Sensor A :class:`SpaceCenter.Sensor` if the part is a sensor, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Sensor` .. attribute:: solar_panel: SpaceCenter.SolarPanel A :class:`SpaceCenter.SolarPanel` if the part is a solar panel, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.SolarPanel` .. attribute:: wheel: SpaceCenter.Wheel A :class:`SpaceCenter.Wheel` if the part is a wheel, otherwise ``nil``. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Wheel` .. method:: position(reference_frame) The position of the part in the given reference frame. :param SpaceCenter.ReferenceFrame reference_frame: The reference frame that the returned position vector is in. :returns: The position as a vector. :rtype: Tuple .. note:: This is a fixed position in the part, defined by the parts model. It s not necessarily the same as the parts center of mass. Use :meth:`SpaceCenter.Part.center_of_mass` to get the parts center of mass. .. method:: center_of_mass(reference_frame) The position of the parts center of mass in the given reference frame. If the part is physicsless, this is equivalent to :meth:`SpaceCenter.Part.position`. :param SpaceCenter.ReferenceFrame reference_frame: The reference frame that the returned position vector is in. :returns: The position as a vector. :rtype: Tuple .. method:: bounding_box(reference_frame) The axis-aligned bounding box of the part in the given reference frame. :param SpaceCenter.ReferenceFrame reference_frame: The reference frame that the returned position vectors are in. :returns: The positions of the minimum and maximum vertices of the box, as position vectors. :rtype: Tuple .. note:: This is computed from the collision mesh of the part. If the part is not collidable, the box has zero volume and is centered on the :meth:`SpaceCenter.Part.position` of the part. .. method:: direction(reference_frame) The direction the part points in, in the given reference frame. :param SpaceCenter.ReferenceFrame reference_frame: The reference frame that the returned direction is in. :returns: The direction as a unit vector. :rtype: Tuple .. method:: velocity(reference_frame) The linear velocity of the part in the given reference frame. :param SpaceCenter.ReferenceFrame reference_frame: The reference frame that the returned velocity vector is in. :returns: The velocity as a vector. The vector points in the direction of travel, and its magnitude is the speed of the body in meters per second. :rtype: Tuple .. method:: rotation(reference_frame) The rotation of the part, in the given reference frame. :param SpaceCenter.ReferenceFrame reference_frame: The reference frame that the returned rotation is in. :returns: The rotation as a quaternion of the form :math:`(x, y, z, w)`. :rtype: Tuple .. attribute:: moment_of_inertia: Tuple The moment of inertia of the part in :math:`kg.m^2` around its center of mass in the parts reference frame (:class:`SpaceCenter.ReferenceFrame`). :Attribute: Read-only, cannot be set :rtype: Tuple .. attribute:: inertia_tensor: List The inertia tensor of the part in the parts reference frame (:class:`SpaceCenter.ReferenceFrame`). Returns the 3x3 matrix as a list of elements, in row-major order. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: reference_frame: SpaceCenter.ReferenceFrame The reference frame that is fixed relative to this part, and centered on a fixed position within the part, defined by the parts model. * The origin is at the position of the part, as returned by :meth:`SpaceCenter.Part.position`. * The axes rotate with the part. * The x, y and z axis directions depend on the design of the part. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.ReferenceFrame` .. note:: For docking port parts, this reference frame is not necessarily equivalent to the reference frame for the docking port, returned by :attr:`SpaceCenter.DockingPort.reference_frame`. .. figure:: /images/reference-frames/part.png :align: center Mk1 Command Pod reference frame origin and axes .. attribute:: center_of_mass_reference_frame: SpaceCenter.ReferenceFrame The reference frame that is fixed relative to this part, and centered on its center of mass. * The origin is at the center of mass of the part, as returned by :meth:`SpaceCenter.Part.center_of_mass`. * The axes rotate with the part. * The x, y and z axis directions depend on the design of the part. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.ReferenceFrame` .. note:: For docking port parts, this reference frame is not necessarily equivalent to the reference frame for the docking port, returned by :attr:`SpaceCenter.DockingPort.reference_frame`. .. method:: add_force(force, position, reference_frame) Exert a constant force on the part, acting at the given position. :param Tuple force: A vector pointing in the direction that the force acts, with its magnitude equal to the strength of the force in Newtons. :param Tuple position: The position at which the force acts, as a vector. :param SpaceCenter.ReferenceFrame reference_frame: The reference frame that the force and position are in. :returns: An object that can be used to remove or modify the force. :rtype: :class:`SpaceCenter.Force` .. method:: instantaneous_force(force, position, reference_frame) Exert an instantaneous force on the part, acting at the given position. :param Tuple force: A vector pointing in the direction that the force acts, with its magnitude equal to the strength of the force in Newtons. :param Tuple position: The position at which the force acts, as a vector. :param SpaceCenter.ReferenceFrame reference_frame: The reference frame that the force and position are in. .. note:: The force is applied instantaneously in a single physics update. .. attribute:: glow: boolean Whether the part is glowing. :Attribute: Write-only, cannot be read :rtype: boolean .. attribute:: auto_strut_mode: SpaceCenter.AutoStrutMode Auto-strut mode. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.AutoStrutMode` .. class:: AutoStrutMode The state of an auto-strut. :attr:`SpaceCenter.Part.auto_strut_mode` .. data:: off Off .. data:: root Root .. data:: heaviest Heaviest .. data:: grandparent Grandparent .. data:: force_root ForceRoot .. data:: force_heaviest ForceHeaviest .. data:: force_grandparent ForceGrandparent .. class:: Force Obtained by calling :meth:`SpaceCenter.Part.add_force`. .. attribute:: part: SpaceCenter.Part The part that this force is applied to. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: force_vector: Tuple The force vector, in Newtons. :Attribute: Can be read or written :returns: A vector pointing in the direction that the force acts, with its magnitude equal to the strength of the force in Newtons. :rtype: Tuple .. attribute:: position: Tuple The position at which the force acts, in reference frame :class:`SpaceCenter.ReferenceFrame`. :Attribute: Can be read or written :returns: The position as a vector. :rtype: Tuple .. attribute:: reference_frame: SpaceCenter.ReferenceFrame The reference frame of the force vector and position. :Attribute: Can be read or written :rtype: :class:`SpaceCenter.ReferenceFrame` .. method:: remove() Remove the force. Module ------ .. class:: Module This can be used to interact with a specific part module. This includes part modules in stock KSP, and those added by mods. In KSP, each part has zero or more `PartModules `_ associated with it. Each one contains some of the functionality of the part. For example, an engine has a "ModuleEngines" part module that contains all the functionality of an engine. .. attribute:: name: string Name of the PartModule. For example, "ModuleEngines". :Attribute: Read-only, cannot be set :rtype: string .. attribute:: part: SpaceCenter.Part The part that contains this module. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: fields: Map The modules field names and their associated values, as a dictionary. These are the values visible in the right-click menu of the part. :Attribute: Read-only, cannot be set :rtype: Map .. note:: Throws an exception if there is more than one field with the same name. In that case, use :attr:`SpaceCenter.Module.fields_by_id` to get the fields by identifier. .. attribute:: fields_by_id: Map The modules field identifiers and their associated values, as a dictionary. These are the values visible in the right-click menu of the part. :Attribute: Read-only, cannot be set :rtype: Map .. method:: has_field(name) Returns ``True`` if the module has a field with the given name. :param string name: Name of the field. :rtype: boolean .. method:: has_field_with_id(id) Returns ``True`` if the module has a field with the given identifier. :param string id: Identifier of the field. :rtype: boolean .. method:: get_field(name) Returns the value of a field with the given name. :param string name: Name of the field. :rtype: string .. method:: get_field_by_id(id) Returns the value of a field with the given identifier. :param string id: Identifier of the field. :rtype: string .. method:: set_field_int(name, value) Set the value of a field to the given integer number. :param string name: Name of the field. :param number value: Value to set. .. method:: set_field_int_by_id(id, value) Set the value of a field to the given integer number. :param string id: Identifier of the field. :param number value: Value to set. .. method:: set_field_float(name, value) Set the value of a field to the given floating point number. :param string name: Name of the field. :param number value: Value to set. .. method:: set_field_float_by_id(id, value) Set the value of a field to the given floating point number. :param string id: Identifier of the field. :param number value: Value to set. .. method:: set_field_string(name, value) Set the value of a field to the given string. :param string name: Name of the field. :param string value: Value to set. .. method:: set_field_string_by_id(id, value) Set the value of a field to the given string. :param string id: Identifier of the field. :param string value: Value to set. .. method:: set_field_bool(name, value) Set the value of a field to true or false. :param string name: Name of the field. :param boolean value: Value to set. .. method:: set_field_bool_by_id(id, value) Set the value of a field to true or false. :param string id: Identifier of the field. :param boolean value: Value to set. .. method:: reset_field(name) Set the value of a field to its original value. :param string name: Name of the field. .. method:: reset_field_by_id(id) Set the value of a field to its original value. :param string id: Identifier of the field. .. attribute:: events: List A list of the names of all of the modules events. Events are the clickable buttons visible in the right-click menu of the part. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: events_by_id: List A list of the identifiers of all of the modules events. Events are the clickable buttons visible in the right-click menu of the part. :Attribute: Read-only, cannot be set :rtype: List .. method:: has_event(name) ``True`` if the module has an event with the given name. :param string name: :rtype: boolean .. method:: has_event_with_id(id) ``True`` if the module has an event with the given identifier. :param string id: :rtype: boolean .. method:: trigger_event(name) Trigger the named event. Equivalent to clicking the button in the right-click menu of the part. :param string name: .. method:: trigger_event_by_id(id) Trigger the event with the given identifier. Equivalent to clicking the button in the right-click menu of the part. :param string id: .. attribute:: actions: List A list of all the names of the modules actions. These are the parts actions that can be assigned to action groups in the in-game editor. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: actions_by_id: List A list of all the identifiers of the modules actions. These are the parts actions that can be assigned to action groups in the in-game editor. :Attribute: Read-only, cannot be set :rtype: List .. method:: has_action(name) ``True`` if the part has an action with the given name. :param string name: :rtype: boolean .. method:: has_action_with_id(id) ``True`` if the part has an action with the given identifier. :param string id: :rtype: boolean .. method:: set_action(name, [value = True]) Set the value of an action with the given name. :param string name: :param boolean value: .. method:: set_action_by_id(id, [value = True]) Set the value of an action with the given identifier. :param string id: :param boolean value: Specific Types of Part ---------------------- The following classes provide functionality for specific types of part. .. contents:: :local: Antenna ^^^^^^^ .. note:: If RemoteTech is installed, use the RemoteTech service APIs to interact with antennas. This class is only for stock KSP antennas. .. class:: Antenna An antenna. Obtained by calling :attr:`SpaceCenter.Part.antenna`. .. attribute:: part: SpaceCenter.Part The part object for this antenna. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: state: SpaceCenter.AntennaState The current state of the antenna. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.AntennaState` .. attribute:: deployable: boolean Whether the antenna is deployable. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: deployed: boolean Whether the antenna is deployed. :Attribute: Can be read or written :rtype: boolean .. note:: Fixed antennas are always deployed. Returns an error if you try to deploy a fixed antenna. .. attribute:: can_transmit: boolean Whether data can be transmitted by this antenna. :Attribute: Read-only, cannot be set :rtype: boolean .. method:: transmit() Transmit data. .. method:: cancel() Cancel current transmission of data. .. attribute:: allow_partial: boolean Whether partial data transmission is permitted. :Attribute: Can be read or written :rtype: boolean .. attribute:: power: number The power of the antenna. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: combinable: boolean Whether the antenna can be combined with other antennae on the vessel to boost the power. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: combinable_exponent: number Exponent used to calculate the combined power of multiple antennae on a vessel. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: packet_interval: number Interval between sending packets in seconds. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: packet_size: number Amount of data sent per packet in Mits. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: packet_resource_cost: number Units of electric charge consumed per packet sent. :Attribute: Read-only, cannot be set :rtype: number .. class:: AntennaState The state of an antenna. See :attr:`SpaceCenter.Antenna.state`. .. data:: deployed Antenna is fully deployed. .. data:: retracted Antenna is fully retracted. .. data:: deploying Antenna is being deployed. .. data:: retracting Antenna is being retracted. .. data:: broken Antenna is broken. Cargo Bay ^^^^^^^^^ .. class:: CargoBay A cargo bay. Obtained by calling :attr:`SpaceCenter.Part.cargo_bay`. .. attribute:: part: SpaceCenter.Part The part object for this cargo bay. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: state: SpaceCenter.CargoBayState The state of the cargo bay. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.CargoBayState` .. attribute:: open: boolean Whether the cargo bay is open. :Attribute: Can be read or written :rtype: boolean .. class:: CargoBayState The state of a cargo bay. See :attr:`SpaceCenter.CargoBay.state`. .. data:: open Cargo bay is fully open. .. data:: closed Cargo bay closed and locked. .. data:: opening Cargo bay is opening. .. data:: closing Cargo bay is closing. Control Surface ^^^^^^^^^^^^^^^ .. class:: ControlSurface An aerodynamic control surface. Obtained by calling :attr:`SpaceCenter.Part.control_surface`. .. attribute:: part: SpaceCenter.Part The part object for this control surface. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: pitch_enabled: boolean Whether the control surface has pitch control enabled. :Attribute: Can be read or written :rtype: boolean .. attribute:: yaw_enabled: boolean Whether the control surface has yaw control enabled. :Attribute: Can be read or written :rtype: boolean .. attribute:: roll_enabled: boolean Whether the control surface has roll control enabled. :Attribute: Can be read or written :rtype: boolean .. attribute:: authority_limiter: number The authority limiter for the control surface, which controls how far the control surface will move. :Attribute: Can be read or written :rtype: number .. attribute:: inverted: boolean Whether the control surface movement is inverted. :Attribute: Can be read or written :rtype: boolean .. attribute:: deployed: boolean Whether the control surface has been fully deployed. :Attribute: Can be read or written :rtype: boolean .. attribute:: surface_area: number Surface area of the control surface in :math:`m^2`. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: available_torque: Tuple The available torque, in Newton meters, that can be produced by this control surface, in the positive and negative pitch, roll and yaw axes of the vessel. These axes correspond to the coordinate axes of the :attr:`SpaceCenter.Vessel.reference_frame`. :Attribute: Read-only, cannot be set :rtype: Tuple Decoupler ^^^^^^^^^ .. class:: Decoupler A decoupler. Obtained by calling :attr:`SpaceCenter.Part.decoupler` .. attribute:: part: SpaceCenter.Part The part object for this decoupler. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. method:: decouple() Fires the decoupler. Returns the new vessel created when the decoupler fires. Throws an exception if the decoupler has already fired. :rtype: :class:`SpaceCenter.Vessel` .. note:: When called, the active vessel may change. It is therefore possible that, after calling this function, the object(s) returned by previous call(s) to :attr:`SpaceCenter.active_vessel` no longer refer to the active vessel. .. attribute:: decoupled: boolean Whether the decoupler has fired. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: staged: boolean Whether the decoupler is enabled in the staging sequence. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: impulse: number The impulse that the decoupler imparts when it is fired, in Newton seconds. :Attribute: Read-only, cannot be set :rtype: number Docking Port ^^^^^^^^^^^^ .. class:: DockingPort A docking port. Obtained by calling :attr:`SpaceCenter.Part.docking_port` .. attribute:: part: SpaceCenter.Part The part object for this docking port. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: state: SpaceCenter.DockingPortState The current state of the docking port. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.DockingPortState` .. attribute:: docked_part: SpaceCenter.Part The part that this docking port is docked to. Returns ``nil`` if this docking port is not docked to anything. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. method:: undock() Undocks the docking port and returns the new :class:`SpaceCenter.Vessel` that is created. This method can be called for either docking port in a docked pair. Throws an exception if the docking port is not docked to anything. :rtype: :class:`SpaceCenter.Vessel` .. note:: When called, the active vessel may change. It is therefore possible that, after calling this function, the object(s) returned by previous call(s) to :attr:`SpaceCenter.active_vessel` no longer refer to the active vessel. .. attribute:: reengage_distance: number The distance a docking port must move away when it undocks before it becomes ready to dock with another port, in meters. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: has_shield: boolean Whether the docking port has a shield. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: shielded: boolean The state of the docking ports shield, if it has one. Returns ``True`` if the docking port has a shield, and the shield is closed. Otherwise returns ``False``. When set to ``True``, the shield is closed, and when set to ``False`` the shield is opened. If the docking port does not have a shield, setting this attribute has no effect. :Attribute: Can be read or written :rtype: boolean .. attribute:: can_rotate: boolean Whether the docking port can be commanded to rotate while docked. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: maximum_rotation: number Maximum rotation angle in degrees. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: minimum_rotation: number Minimum rotation angle in degrees. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: rotation_target: number Rotation target angle in degrees. :Attribute: Can be read or written :rtype: number .. attribute:: rotation_locked: boolean Lock rotation. When locked, allows auto-strut to work across the joint. :Attribute: Can be read or written :rtype: boolean .. method:: position(reference_frame) The position of the docking port, in the given reference frame. :param SpaceCenter.ReferenceFrame reference_frame: The reference frame that the returned position vector is in. :returns: The position as a vector. :rtype: Tuple .. method:: direction(reference_frame) The direction that docking port points in, in the given reference frame. :param SpaceCenter.ReferenceFrame reference_frame: The reference frame that the returned direction is in. :returns: The direction as a unit vector. :rtype: Tuple .. method:: rotation(reference_frame) The rotation of the docking port, in the given reference frame. :param SpaceCenter.ReferenceFrame reference_frame: The reference frame that the returned rotation is in. :returns: The rotation as a quaternion of the form :math:`(x, y, z, w)`. :rtype: Tuple .. attribute:: reference_frame: SpaceCenter.ReferenceFrame The reference frame that is fixed relative to this docking port, and oriented with the port. * The origin is at the position of the docking port. * The axes rotate with the docking port. * The x-axis points out to the right side of the docking port. * The y-axis points in the direction the docking port is facing. * The z-axis points out of the bottom off the docking port. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.ReferenceFrame` .. note:: This reference frame is not necessarily equivalent to the reference frame for the part, returned by :attr:`SpaceCenter.Part.reference_frame`. .. figure:: /images/reference-frames/docking-port.png :align: center Docking port reference frame origin and axes .. figure:: /images/reference-frames/docking-port-inline.png :align: center Inline docking port reference frame origin and axes .. class:: DockingPortState The state of a docking port. See :attr:`SpaceCenter.DockingPort.state`. .. data:: ready The docking port is ready to dock to another docking port. .. data:: docked The docking port is docked to another docking port, or docked to another part (from the VAB/SPH). .. data:: docking The docking port is very close to another docking port, but has not docked. It is using magnetic force to acquire a solid dock. .. data:: undocking The docking port has just been undocked from another docking port, and is disabled until it moves away by a sufficient distance (:attr:`SpaceCenter.DockingPort.reengage_distance`). .. data:: shielded The docking port has a shield, and the shield is closed. .. data:: moving The docking ports shield is currently opening/closing. Engine ^^^^^^ .. class:: Engine An engine, including ones of various types. For example liquid fuelled gimballed engines, solid rocket boosters and jet engines. Obtained by calling :attr:`SpaceCenter.Part.engine`. .. note:: For RCS thrusters :attr:`SpaceCenter.Part.rcs`. .. attribute:: part: SpaceCenter.Part The part object for this engine. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: active: boolean Whether the engine is active. Setting this attribute may have no effect, depending on :attr:`SpaceCenter.Engine.can_shutdown` and :attr:`SpaceCenter.Engine.can_restart`. :Attribute: Can be read or written :rtype: boolean .. attribute:: thrust: number The current amount of thrust being produced by the engine, in Newtons. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: available_thrust: number The amount of thrust, in Newtons, that would be produced by the engine when activated and with its throttle set to 100%. Returns zero if the engine does not have any fuel. Takes the engine's current :attr:`SpaceCenter.Engine.thrust_limit` and atmospheric conditions into account. :Attribute: Read-only, cannot be set :rtype: number .. method:: available_thrust_at(pressure) The amount of thrust, in Newtons, that would be produced by the engine when activated and with its throttle set to 100%. Returns zero if the engine does not have any fuel. Takes the given pressure into account. :param number pressure: Atmospheric pressure in atmospheres :rtype: number .. attribute:: max_thrust: number The amount of thrust, in Newtons, that would be produced by the engine when activated and fueled, with its throttle and throttle limiter set to 100%. :Attribute: Read-only, cannot be set :rtype: number .. method:: max_thrust_at(pressure) The amount of thrust, in Newtons, that would be produced by the engine when activated and fueled, with its throttle and throttle limiter set to 100%. Takes the given pressure into account. :param number pressure: Atmospheric pressure in atmospheres :rtype: number .. attribute:: max_vacuum_thrust: number The maximum amount of thrust that can be produced by the engine in a vacuum, in Newtons. This is the amount of thrust produced by the engine when activated, :attr:`SpaceCenter.Engine.thrust_limit` is set to 100%, the main vessel's throttle is set to 100% and the engine is in a vacuum. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: thrust_limit: number The thrust limiter of the engine. A value between 0 and 1. Setting this attribute may have no effect, for example the thrust limit for a solid rocket booster cannot be changed in flight. :Attribute: Can be read or written :rtype: number .. attribute:: thrusters: List The components of the engine that generate thrust. :Attribute: Read-only, cannot be set :rtype: List .. note:: For example, this corresponds to the rocket nozzel on a solid rocket booster, or the individual nozzels on a RAPIER engine. The overall thrust produced by the engine, as reported by :attr:`SpaceCenter.Engine.available_thrust`, :attr:`SpaceCenter.Engine.max_thrust` and others, is the sum of the thrust generated by each thruster. .. attribute:: specific_impulse: number The current specific impulse of the engine, in seconds. Returns zero if the engine is not active. :Attribute: Read-only, cannot be set :rtype: number .. method:: specific_impulse_at(pressure) The specific impulse of the engine under the given pressure, in seconds. Returns zero if the engine is not active. :param number pressure: Atmospheric pressure in atmospheres :rtype: number .. attribute:: vacuum_specific_impulse: number The vacuum specific impulse of the engine, in seconds. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: kerbin_sea_level_specific_impulse: number The specific impulse of the engine at sea level on Kerbin, in seconds. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: propellant_names: List The names of the propellants that the engine consumes. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: propellant_ratios: Map The ratio of resources that the engine consumes. A dictionary mapping resource names to the ratio at which they are consumed by the engine. :Attribute: Read-only, cannot be set :rtype: Map .. note:: For example, if the ratios are 0.6 for LiquidFuel and 0.4 for Oxidizer, then for every 0.6 units of LiquidFuel that the engine burns, it will burn 0.4 units of Oxidizer. .. attribute:: propellants: List The propellants that the engine consumes. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: has_fuel: boolean Whether the engine has any fuel available. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: throttle: number The current throttle setting for the engine. A value between 0 and 1. This is not necessarily the same as the vessel's main throttle setting, as some engines take time to adjust their throttle (such as jet engines), or independent throttle may be enabled. When the engine's independent throttle is enabled (see :attr:`SpaceCenter.Engine.independent_throttle`), can be used to set the throttle percentage. :Attribute: Can be read or written :rtype: number .. attribute:: throttle_locked: boolean Whether the :attr:`SpaceCenter.Control.throttle` affects the engine. For example, this is ``True`` for liquid fueled rockets, and ``False`` for solid rocket boosters. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: independent_throttle: boolean Whether the independent throttle is enabled for the engine. :Attribute: Can be read or written :rtype: boolean .. attribute:: can_restart: boolean Whether the engine can be restarted once shutdown. If the engine cannot be shutdown, returns ``False``. For example, this is ``True`` for liquid fueled rockets and ``False`` for solid rocket boosters. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: can_shutdown: boolean Whether the engine can be shutdown once activated. For example, this is ``True`` for liquid fueled rockets and ``False`` for solid rocket boosters. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: has_modes: boolean Whether the engine has multiple modes of operation. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: mode: string The name of the current engine mode. :Attribute: Can be read or written :rtype: string .. attribute:: modes: Map The available modes for the engine. A dictionary mapping mode names to :class:`SpaceCenter.Engine` objects. :Attribute: Read-only, cannot be set :rtype: Map .. method:: toggle_mode() Toggle the current engine mode. .. attribute:: auto_mode_switch: boolean Whether the engine will automatically switch modes. :Attribute: Can be read or written :rtype: boolean .. attribute:: gimballed: boolean Whether the engine is gimballed. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: gimbal_range: number The range over which the gimbal can move, in degrees. Returns 0 if the engine is not gimballed. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: gimbal_locked: boolean Whether the engines gimbal is locked in place. Setting this attribute has no effect if the engine is not gimballed. :Attribute: Can be read or written :rtype: boolean .. attribute:: gimbal_limit: number The gimbal limiter of the engine. A value between 0 and 1. Returns 0 if the gimbal is locked. :Attribute: Can be read or written :rtype: number .. attribute:: available_torque: Tuple The available torque, in Newton meters, that can be produced by this engine, in the positive and negative pitch, roll and yaw axes of the vessel. These axes correspond to the coordinate axes of the :attr:`SpaceCenter.Vessel.reference_frame`. Returns zero if the engine is inactive, or not gimballed. :Attribute: Read-only, cannot be set :rtype: Tuple .. class:: Propellant A propellant for an engine. Obtains by calling :attr:`SpaceCenter.Engine.propellants`. .. attribute:: name: string The name of the propellant. :Attribute: Read-only, cannot be set :rtype: string .. attribute:: current_amount: number The current amount of propellant. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: current_requirement: number The required amount of propellant. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: total_resource_available: number The total amount of the underlying resource currently reachable given resource flow rules. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: total_resource_capacity: number The total vehicle capacity for the underlying propellant resource, restricted by resource flow rules. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: ignore_for_isp: boolean If this propellant should be ignored when calculating required mass flow given specific impulse. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: ignore_for_thrust_curve: boolean If this propellant should be ignored for thrust curve calculations. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: draw_stack_gauge: boolean If this propellant has a stack gauge or not. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: is_deprived: boolean If this propellant is deprived. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: ratio: number The propellant ratio. :Attribute: Read-only, cannot be set :rtype: number Experiment ^^^^^^^^^^ .. class:: Experiment Obtained by calling :attr:`SpaceCenter.Part.experiment`. .. attribute:: part: SpaceCenter.Part The part object for this experiment. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: name: string Internal name of the experiment, as used in `part cfg files `_. :Attribute: Read-only, cannot be set :rtype: string .. attribute:: title: string Title of the experiment, as shown on the in-game UI. :Attribute: Read-only, cannot be set :rtype: string .. method:: run() Run the experiment. .. method:: transmit() Transmit all experimental data contained by this part. .. method:: dump() Dump the experimental data contained by the experiment. .. method:: reset() Reset the experiment. .. attribute:: deployed: boolean Whether the experiment has been deployed. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: rerunnable: boolean Whether the experiment can be re-run. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: inoperable: boolean Whether the experiment is inoperable. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: has_data: boolean Whether the experiment contains data. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: data: List The data contained in this experiment. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: biome: string The name of the biome the experiment is currently in. :Attribute: Read-only, cannot be set :rtype: string .. attribute:: available: boolean Determines if the experiment is available given the current conditions. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: science_subject: SpaceCenter.ScienceSubject Containing information on the corresponding specific science result for the current conditions. Returns ``nil`` if the experiment is unavailable. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.ScienceSubject` .. class:: ScienceData Obtained by calling :attr:`SpaceCenter.Experiment.data`. .. attribute:: data_amount: number Data amount. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: science_value: number Science value. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: transmit_value: number Transmit value. :Attribute: Read-only, cannot be set :rtype: number .. class:: ScienceSubject Obtained by calling :attr:`SpaceCenter.Experiment.science_subject`. .. attribute:: title: string Title of science subject, displayed in science archives :Attribute: Read-only, cannot be set :rtype: string .. attribute:: is_complete: boolean Whether the experiment has been completed. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: science: number Amount of science already earned from this subject, not updated until after transmission/recovery. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: science_cap: number Total science allowable for this subject. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: data_scale: number Multiply science value by this to determine data amount in mits. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: subject_value: number Multiplier for specific Celestial Body/Experiment Situation combination. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: scientific_value: number Diminishing value multiplier for decreasing the science value returned from repeated experiments. :Attribute: Read-only, cannot be set :rtype: number Fairing ^^^^^^^ .. class:: Fairing A fairing. Obtained by calling :attr:`SpaceCenter.Part.fairing`. Supports both stock fairings, and those from the ProceduralFairings mod. .. attribute:: part: SpaceCenter.Part The part object for this fairing. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. method:: jettison() Jettison the fairing. Has no effect if it has already been jettisoned. .. attribute:: jettisoned: boolean Whether the fairing has been jettisoned. :Attribute: Read-only, cannot be set :rtype: boolean Intake ^^^^^^ .. class:: Intake An air intake. Obtained by calling :attr:`SpaceCenter.Part.intake`. .. attribute:: part: SpaceCenter.Part The part object for this intake. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: open: boolean Whether the intake is open. :Attribute: Can be read or written :rtype: boolean .. attribute:: speed: number Speed of the flow into the intake, in :math:`m/s`. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: flow: number The rate of flow into the intake, in units of resource per second. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: area: number The area of the intake's opening, in square meters. :Attribute: Read-only, cannot be set :rtype: number Leg ^^^ .. class:: Leg A landing leg. Obtained by calling :attr:`SpaceCenter.Part.leg`. .. attribute:: part: SpaceCenter.Part The part object for this landing leg. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: state: SpaceCenter.LegState The current state of the landing leg. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.LegState` .. attribute:: deployable: boolean Whether the leg is deployable. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: deployed: boolean Whether the landing leg is deployed. :Attribute: Can be read or written :rtype: boolean .. note:: Fixed landing legs are always deployed. Returns an error if you try to deploy fixed landing gear. .. attribute:: is_grounded: boolean Returns whether the leg is touching the ground. :Attribute: Read-only, cannot be set :rtype: boolean .. class:: LegState The state of a landing leg. See :attr:`SpaceCenter.Leg.state`. .. data:: deployed Landing leg is fully deployed. .. data:: retracted Landing leg is fully retracted. .. data:: deploying Landing leg is being deployed. .. data:: retracting Landing leg is being retracted. .. data:: broken Landing leg is broken. Launch Clamp ^^^^^^^^^^^^ .. class:: LaunchClamp A launch clamp. Obtained by calling :attr:`SpaceCenter.Part.launch_clamp`. .. attribute:: part: SpaceCenter.Part The part object for this launch clamp. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. method:: release() Releases the docking clamp. Has no effect if the clamp has already been released. Light ^^^^^ .. class:: Light A light. Obtained by calling :attr:`SpaceCenter.Part.light`. .. attribute:: part: SpaceCenter.Part The part object for this light. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: active: boolean Whether the light is switched on. :Attribute: Can be read or written :rtype: boolean .. attribute:: color: Tuple The color of the light, as an RGB triple. :Attribute: Can be read or written :rtype: Tuple .. attribute:: blink: boolean Whether blinking is enabled. :Attribute: Can be read or written :rtype: boolean .. attribute:: blink_rate: number The blink rate of the light. :Attribute: Can be read or written :rtype: number .. attribute:: power_usage: number The current power usage, in units of charge per second. :Attribute: Read-only, cannot be set :rtype: number Parachute ^^^^^^^^^ .. class:: Parachute A parachute. Obtained by calling :attr:`SpaceCenter.Part.parachute`. .. attribute:: part: SpaceCenter.Part The part object for this parachute. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. method:: deploy() Deploys the parachute. This has no effect if the parachute has already been deployed. .. attribute:: deployed: boolean Whether the parachute has been deployed. :Attribute: Read-only, cannot be set :rtype: boolean .. method:: arm() Deploys the parachute. This has no effect if the parachute has already been armed or deployed. .. attribute:: armed: boolean Whether the parachute has been armed or deployed. :Attribute: Read-only, cannot be set :rtype: boolean .. method:: cut() Cuts the parachute. .. attribute:: state: SpaceCenter.ParachuteState The current state of the parachute. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.ParachuteState` .. attribute:: deploy_altitude: number The altitude at which the parachute will full deploy, in meters. Only applicable to stock parachutes. :Attribute: Can be read or written :rtype: number .. attribute:: deploy_min_pressure: number The minimum pressure at which the parachute will semi-deploy, in atmospheres. Only applicable to stock parachutes. :Attribute: Can be read or written :rtype: number .. class:: ParachuteState The state of a parachute. See :attr:`SpaceCenter.Parachute.state`. .. data:: stowed The parachute is safely tucked away inside its housing. .. data:: armed The parachute is armed for deployment. .. data:: semi_deployed The parachute has been deployed and is providing some drag, but is not fully deployed yet. (Stock parachutes only) .. data:: deployed The parachute is fully deployed. .. data:: cut The parachute has been cut. Radiator ^^^^^^^^ .. class:: Radiator A radiator. Obtained by calling :attr:`SpaceCenter.Part.radiator`. .. attribute:: part: SpaceCenter.Part The part object for this radiator. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: deployable: boolean Whether the radiator is deployable. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: deployed: boolean For a deployable radiator, ``True`` if the radiator is extended. If the radiator is not deployable, this is always ``True``. :Attribute: Can be read or written :rtype: boolean .. attribute:: state: SpaceCenter.RadiatorState The current state of the radiator. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.RadiatorState` .. note:: A fixed radiator is always :attr:`SpaceCenter.RadiatorState.extended`. .. class:: RadiatorState The state of a radiator. :attr:`SpaceCenter.Radiator.state` .. data:: extended Radiator is fully extended. .. data:: retracted Radiator is fully retracted. .. data:: extending Radiator is being extended. .. data:: retracting Radiator is being retracted. .. data:: broken Radiator is broken. Resource Converter ^^^^^^^^^^^^^^^^^^ .. class:: ResourceConverter A resource converter. Obtained by calling :attr:`SpaceCenter.Part.resource_converter`. .. attribute:: part: SpaceCenter.Part The part object for this converter. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: count: number The number of converters in the part. :Attribute: Read-only, cannot be set :rtype: number .. method:: name(index) The name of the specified converter. :param number index: Index of the converter. :rtype: string .. method:: active(index) True if the specified converter is active. :param number index: Index of the converter. :rtype: boolean .. method:: start(index) Start the specified converter. :param number index: Index of the converter. .. method:: stop(index) Stop the specified converter. :param number index: Index of the converter. .. method:: state(index) The state of the specified converter. :param number index: Index of the converter. :rtype: :class:`SpaceCenter.ResourceConverterState` .. method:: status_info(index) Status information for the specified converter. This is the full status message shown in the in-game UI. :param number index: Index of the converter. :rtype: string .. method:: inputs(index) List of the names of resources consumed by the specified converter. :param number index: Index of the converter. :rtype: List .. method:: outputs(index) List of the names of resources produced by the specified converter. :param number index: Index of the converter. :rtype: List .. attribute:: optimum_core_temperature: number The core temperature at which the converter will operate with peak efficiency, in Kelvin. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: core_temperature: number The core temperature of the converter, in Kelvin. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: thermal_efficiency: number The thermal efficiency of the converter, as a percentage of its maximum. :Attribute: Read-only, cannot be set :rtype: number .. class:: ResourceConverterState The state of a resource converter. See :meth:`SpaceCenter.ResourceConverter.state`. .. data:: running Converter is running. .. data:: idle Converter is idle. .. data:: missing_resource Converter is missing a required resource. .. data:: storage_full No available storage for output resource. .. data:: capacity At preset resource capacity. .. data:: unknown Unknown state. Possible with modified resource converters. In this case, check :meth:`SpaceCenter.ResourceConverter.status_info` for more information. Resource Harvester ^^^^^^^^^^^^^^^^^^ .. class:: ResourceHarvester A resource harvester (drill). Obtained by calling :attr:`SpaceCenter.Part.resource_harvester`. .. attribute:: part: SpaceCenter.Part The part object for this harvester. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: state: SpaceCenter.ResourceHarvesterState The state of the harvester. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.ResourceHarvesterState` .. attribute:: deployed: boolean Whether the harvester is deployed. :Attribute: Can be read or written :rtype: boolean .. attribute:: active: boolean Whether the harvester is actively drilling. :Attribute: Can be read or written :rtype: boolean .. attribute:: extraction_rate: number The rate at which the drill is extracting ore, in units per second. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: thermal_efficiency: number The thermal efficiency of the drill, as a percentage of its maximum. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: core_temperature: number The core temperature of the drill, in Kelvin. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: optimum_core_temperature: number The core temperature at which the drill will operate with peak efficiency, in Kelvin. :Attribute: Read-only, cannot be set :rtype: number .. class:: ResourceHarvesterState The state of a resource harvester. See :attr:`SpaceCenter.ResourceHarvester.state`. .. data:: deploying The drill is deploying. .. data:: deployed The drill is deployed and ready. .. data:: retracting The drill is retracting. .. data:: retracted The drill is retracted. .. data:: active The drill is running. Reaction Wheel ^^^^^^^^^^^^^^ .. class:: ReactionWheel A reaction wheel. Obtained by calling :attr:`SpaceCenter.Part.reaction_wheel`. .. attribute:: part: SpaceCenter.Part The part object for this reaction wheel. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: active: boolean Whether the reaction wheel is active. :Attribute: Can be read or written :rtype: boolean .. attribute:: broken: boolean Whether the reaction wheel is broken. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: available_torque: Tuple The available torque, in Newton meters, that can be produced by this reaction wheel, in the positive and negative pitch, roll and yaw axes of the vessel. These axes correspond to the coordinate axes of the :attr:`SpaceCenter.Vessel.reference_frame`. Returns zero if the reaction wheel is inactive or broken. :Attribute: Read-only, cannot be set :rtype: Tuple .. attribute:: max_torque: Tuple The maximum torque, in Newton meters, that can be produced by this reaction wheel, when it is active, in the positive and negative pitch, roll and yaw axes of the vessel. These axes correspond to the coordinate axes of the :attr:`SpaceCenter.Vessel.reference_frame`. :Attribute: Read-only, cannot be set :rtype: Tuple Resource Drain ^^^^^^^^^^^^^^ .. class:: ResourceDrain A resource drain. Obtained by calling :attr:`SpaceCenter.Part.resource_drain`. .. attribute:: part: SpaceCenter.Part The part object for this resource drain. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: available_resources: List List of available resources. :Attribute: Read-only, cannot be set :rtype: List .. method:: set_resource(resource, enabled) Whether the given resource should be drained. :param SpaceCenter.Resource resource: :param boolean enabled: .. method:: check_resource(resource) Whether the provided resource is enabled for draining. :param SpaceCenter.Resource resource: :rtype: boolean .. attribute:: drain_mode: SpaceCenter.DrainMode The drain mode. :Attribute: Can be read or written :rtype: :class:`SpaceCenter.DrainMode` .. attribute:: min_rate: number Minimum possible drain rate :Attribute: Read-only, cannot be set :rtype: number .. attribute:: max_rate: number Maximum possible drain rate. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: rate: number Current drain rate. :Attribute: Can be read or written :rtype: number .. method:: start() Activates resource draining for all enabled parts. .. method:: stop() Turns off resource draining. .. class:: DrainMode Resource drain mode. See :attr:`SpaceCenter.ResourceDrain.drain_mode`. .. data:: part Drains from the parent part. .. data:: vessel Drains from all available parts. Robotic Controller ^^^^^^^^^^^^^^^^^^ .. class:: RoboticController A robotic controller. Obtained by calling :attr:`SpaceCenter.Part.robotic_controller`. .. attribute:: part: SpaceCenter.Part The part object for this controller. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. method:: has_part(part) Whether the controller has a part. :param SpaceCenter.Part part: :rtype: boolean .. method:: axes() The axes for the controller. :rtype: List .. method:: add_axis(module, field_name) Add an axis to the controller. :param SpaceCenter.Module module: :param string field_name: :returns: Returns ``True`` if the axis is added successfully. :rtype: boolean .. method:: add_key_frame(module, field_name, time, value) Add key frame value for controller axis. :param SpaceCenter.Module module: :param string field_name: :param number time: :param number value: :returns: Returns ``True`` if the key frame is added successfully. :rtype: boolean .. method:: clear_axis(module, field_name) Clear axis. :param SpaceCenter.Module module: :param string field_name: :returns: Returns ``True`` if the axis is cleared successfully. :rtype: boolean Robotic Hinge ^^^^^^^^^^^^^ .. class:: RoboticHinge A robotic hinge. Obtained by calling :attr:`SpaceCenter.Part.robotic_hinge`. .. attribute:: part: SpaceCenter.Part The part object for this robotic hinge. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: target_angle: number Target angle. :Attribute: Can be read or written :rtype: number .. attribute:: current_angle: number Current angle. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: rate: number Target movement rate in degrees per second. :Attribute: Can be read or written :rtype: number .. attribute:: damping: number Damping percentage. :Attribute: Can be read or written :rtype: number .. attribute:: locked: boolean Lock movement. :Attribute: Can be read or written :rtype: boolean .. attribute:: motor_engaged: boolean Whether the motor is engaged. :Attribute: Can be read or written :rtype: boolean .. method:: move_home() Move hinge to it's built position. Robotic Piston ^^^^^^^^^^^^^^ .. class:: RoboticPiston A robotic piston part. Obtained by calling :attr:`SpaceCenter.Part.robotic_piston`. .. attribute:: part: SpaceCenter.Part The part object for this robotic piston. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: target_extension: number Target extension of the piston. :Attribute: Can be read or written :rtype: number .. attribute:: current_extension: number Current extension of the piston. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: rate: number Target movement rate in degrees per second. :Attribute: Can be read or written :rtype: number .. attribute:: damping: number Damping percentage. :Attribute: Can be read or written :rtype: number .. attribute:: locked: boolean Lock movement. :Attribute: Can be read or written :rtype: boolean .. attribute:: motor_engaged: boolean Whether the motor is engaged. :Attribute: Can be read or written :rtype: boolean .. method:: move_home() Move piston to it's built position. Robotic Rotation ^^^^^^^^^^^^^^^^ .. class:: RoboticRotation A robotic rotation servo. Obtained by calling :attr:`SpaceCenter.Part.robotic_rotation`. .. attribute:: part: SpaceCenter.Part The part object for this robotic rotation servo. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: target_angle: number Target angle. :Attribute: Can be read or written :rtype: number .. attribute:: current_angle: number Current angle. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: rate: number Target movement rate in degrees per second. :Attribute: Can be read or written :rtype: number .. attribute:: damping: number Damping percentage. :Attribute: Can be read or written :rtype: number .. attribute:: locked: boolean Lock Movement :Attribute: Can be read or written :rtype: boolean .. attribute:: motor_engaged: boolean Whether the motor is engaged. :Attribute: Can be read or written :rtype: boolean .. method:: move_home() Move rotation servo to it's built position. Robotic Rotor ^^^^^^^^^^^^^ .. class:: RoboticRotor A robotic rotor. Obtained by calling :attr:`SpaceCenter.Part.robotic_rotor`. .. attribute:: part: SpaceCenter.Part The part object for this robotic rotor. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: target_rpm: number Target RPM. :Attribute: Can be read or written :rtype: number .. attribute:: current_rpm: number Current RPM. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: inverted: boolean Whether the rotor direction is inverted. :Attribute: Can be read or written :rtype: boolean .. attribute:: torque_limit: number Torque limit percentage. :Attribute: Can be read or written :rtype: number .. attribute:: locked: boolean Lock movement. :Attribute: Can be read or written :rtype: boolean .. attribute:: motor_engaged: boolean Whether the motor is engaged. :Attribute: Can be read or written :rtype: boolean RCS ^^^ .. class:: RCS An RCS block or thruster. Obtained by calling :attr:`SpaceCenter.Part.rcs`. .. attribute:: part: SpaceCenter.Part The part object for this RCS. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: active: boolean Whether the RCS thrusters are active. An RCS thruster is inactive if the RCS action group is disabled (:attr:`SpaceCenter.Control.rcs`), the RCS thruster itself is not enabled (:attr:`SpaceCenter.RCS.enabled`) or it is covered by a fairing (:attr:`SpaceCenter.Part.shielded`). :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: enabled: boolean Whether the RCS thrusters are enabled. :Attribute: Can be read or written :rtype: boolean .. attribute:: pitch_enabled: boolean Whether the RCS thruster will fire when pitch control input is given. :Attribute: Can be read or written :rtype: boolean .. attribute:: yaw_enabled: boolean Whether the RCS thruster will fire when yaw control input is given. :Attribute: Can be read or written :rtype: boolean .. attribute:: roll_enabled: boolean Whether the RCS thruster will fire when roll control input is given. :Attribute: Can be read or written :rtype: boolean .. attribute:: forward_enabled: boolean Whether the RCS thruster will fire when pitch control input is given. :Attribute: Can be read or written :rtype: boolean .. attribute:: up_enabled: boolean Whether the RCS thruster will fire when yaw control input is given. :Attribute: Can be read or written :rtype: boolean .. attribute:: right_enabled: boolean Whether the RCS thruster will fire when roll control input is given. :Attribute: Can be read or written :rtype: boolean .. attribute:: available_torque: Tuple The available torque, in Newton meters, that can be produced by this RCS, in the positive and negative pitch, roll and yaw axes of the vessel. These axes correspond to the coordinate axes of the :attr:`SpaceCenter.Vessel.reference_frame`. Returns zero if RCS is disable. :Attribute: Read-only, cannot be set :rtype: Tuple .. attribute:: available_force: Tuple The available force, in Newtons, that can be produced by this RCS, in the positive and negative x, y and z axes of the vessel. These axes correspond to the coordinate axes of the :attr:`SpaceCenter.Vessel.reference_frame`. Returns zero if RCS is disabled. :Attribute: Read-only, cannot be set :rtype: Tuple .. attribute:: available_thrust: number The amount of thrust, in Newtons, that would be produced by the thruster when activated. Returns zero if the thruster does not have any fuel. Takes the thrusters current :attr:`SpaceCenter.RCS.thrust_limit` and atmospheric conditions into account. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: max_thrust: number The maximum amount of thrust that can be produced by the RCS thrusters when active, in Newtons. Takes the thrusters current :attr:`SpaceCenter.RCS.thrust_limit` and atmospheric conditions into account. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: max_vacuum_thrust: number The maximum amount of thrust that can be produced by the RCS thrusters when active in a vacuum, in Newtons. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: thrust_limit: number The thrust limiter of the thruster. A value between 0 and 1. :Attribute: Can be read or written :rtype: number .. attribute:: thrusters: List A list of thrusters, one of each nozzel in the RCS part. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: specific_impulse: number The current specific impulse of the RCS, in seconds. Returns zero if the RCS is not active. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: vacuum_specific_impulse: number The vacuum specific impulse of the RCS, in seconds. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: kerbin_sea_level_specific_impulse: number The specific impulse of the RCS at sea level on Kerbin, in seconds. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: propellants: List The names of resources that the RCS consumes. :Attribute: Read-only, cannot be set :rtype: List .. attribute:: propellant_ratios: Map The ratios of resources that the RCS consumes. A dictionary mapping resource names to the ratios at which they are consumed by the RCS. :Attribute: Read-only, cannot be set :rtype: Map .. attribute:: has_fuel: boolean Whether the RCS has fuel available. :Attribute: Read-only, cannot be set :rtype: boolean Sensor ^^^^^^ .. class:: Sensor A sensor, such as a thermometer. Obtained by calling :attr:`SpaceCenter.Part.sensor`. .. attribute:: part: SpaceCenter.Part The part object for this sensor. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: active: boolean Whether the sensor is active. :Attribute: Can be read or written :rtype: boolean .. attribute:: value: string The current value of the sensor. :Attribute: Read-only, cannot be set :rtype: string Solar Panel ^^^^^^^^^^^ .. class:: SolarPanel A solar panel. Obtained by calling :attr:`SpaceCenter.Part.solar_panel`. .. attribute:: part: SpaceCenter.Part The part object for this solar panel. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: deployable: boolean Whether the solar panel is deployable. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: deployed: boolean Whether the solar panel is extended. :Attribute: Can be read or written :rtype: boolean .. attribute:: state: SpaceCenter.SolarPanelState The current state of the solar panel. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.SolarPanelState` .. attribute:: energy_flow: number The current amount of energy being generated by the solar panel, in units of charge per second. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: sun_exposure: number The current amount of sunlight that is incident on the solar panel, as a percentage. A value between 0 and 1. :Attribute: Read-only, cannot be set :rtype: number .. class:: SolarPanelState The state of a solar panel. See :attr:`SpaceCenter.SolarPanel.state`. .. data:: extended Solar panel is fully extended. .. data:: retracted Solar panel is fully retracted. .. data:: extending Solar panel is being extended. .. data:: retracting Solar panel is being retracted. .. data:: broken Solar panel is broken. Thruster ^^^^^^^^ .. class:: Thruster The component of an :class:`SpaceCenter.Engine` or :class:`SpaceCenter.RCS` part that generates thrust. Can obtained by calling :attr:`SpaceCenter.Engine.thrusters` or :attr:`SpaceCenter.RCS.thrusters`. .. note:: Engines can consist of multiple thrusters. For example, the S3 KS-25x4 "Mammoth" has four rocket nozzels, and so consists of four thrusters. .. attribute:: part: SpaceCenter.Part The :class:`SpaceCenter.Part` that contains this thruster. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. method:: thrust_position(reference_frame) The position at which the thruster generates thrust, in the given reference frame. For gimballed engines, this takes into account the current rotation of the gimbal. :param SpaceCenter.ReferenceFrame reference_frame: The reference frame that the returned position vector is in. :returns: The position as a vector. :rtype: Tuple .. method:: thrust_direction(reference_frame) The direction of the force generated by the thruster, in the given reference frame. This is opposite to the direction in which the thruster expels propellant. For gimballed engines, this takes into account the current rotation of the gimbal. :param SpaceCenter.ReferenceFrame reference_frame: The reference frame that the returned direction is in. :returns: The direction as a unit vector. :rtype: Tuple .. attribute:: thrust_reference_frame: SpaceCenter.ReferenceFrame A reference frame that is fixed relative to the thruster and orientated with its thrust direction (:meth:`SpaceCenter.Thruster.thrust_direction`). For gimballed engines, this takes into account the current rotation of the gimbal. * The origin is at the position of thrust for this thruster (:meth:`SpaceCenter.Thruster.thrust_position`). * The axes rotate with the thrust direction. This is the direction in which the thruster expels propellant, including any gimballing. * The y-axis points along the thrust direction. * The x-axis and z-axis are perpendicular to the thrust direction. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.ReferenceFrame` .. attribute:: gimballed: boolean Whether the thruster is gimballed. :Attribute: Read-only, cannot be set :rtype: boolean .. method:: gimbal_position(reference_frame) Position around which the gimbal pivots. :param SpaceCenter.ReferenceFrame reference_frame: The reference frame that the returned position vector is in. :returns: The position as a vector. :rtype: Tuple .. attribute:: gimbal_angle: Tuple The current gimbal angle in the pitch, roll and yaw axes, in degrees. :Attribute: Read-only, cannot be set :rtype: Tuple .. method:: initial_thrust_position(reference_frame) The position at which the thruster generates thrust, when the engine is in its initial position (no gimballing), in the given reference frame. :param SpaceCenter.ReferenceFrame reference_frame: The reference frame that the returned position vector is in. :returns: The position as a vector. :rtype: Tuple .. note:: This position can move when the gimbal rotates. This is because the thrust position and gimbal position are not necessarily the same. .. method:: initial_thrust_direction(reference_frame) The direction of the force generated by the thruster, when the engine is in its initial position (no gimballing), in the given reference frame. This is opposite to the direction in which the thruster expels propellant. :param SpaceCenter.ReferenceFrame reference_frame: The reference frame that the returned direction is in. :returns: The direction as a unit vector. :rtype: Tuple Wheel ^^^^^ .. class:: Wheel A wheel. Includes landing gear and rover wheels. Obtained by calling :attr:`SpaceCenter.Part.wheel`. Can be used to control the motors, steering and deployment of wheels, among other things. .. attribute:: part: SpaceCenter.Part The part object for this wheel. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.Part` .. attribute:: state: SpaceCenter.WheelState The current state of the wheel. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.WheelState` .. attribute:: radius: number Radius of the wheel, in meters. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: grounded: boolean Whether the wheel is touching the ground. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: has_brakes: boolean Whether the wheel has brakes. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: brakes: number The braking force, as a percentage of maximum, when the brakes are applied. :Attribute: Can be read or written :rtype: number .. attribute:: auto_friction_control: boolean Whether automatic friction control is enabled. :Attribute: Can be read or written :rtype: boolean .. attribute:: manual_friction_control: number Manual friction control value. Only has an effect if automatic friction control is disabled. A value between 0 and 5 inclusive. :Attribute: Can be read or written :rtype: number .. attribute:: deployable: boolean Whether the wheel is deployable. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: deployed: boolean Whether the wheel is deployed. :Attribute: Can be read or written :rtype: boolean .. attribute:: powered: boolean Whether the wheel is powered by a motor. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: motor_enabled: boolean Whether the motor is enabled. :Attribute: Can be read or written :rtype: boolean .. attribute:: motor_inverted: boolean Whether the direction of the motor is inverted. :Attribute: Can be read or written :rtype: boolean .. attribute:: motor_state: SpaceCenter.MotorState Whether the direction of the motor is inverted. :Attribute: Read-only, cannot be set :rtype: :class:`SpaceCenter.MotorState` .. attribute:: motor_output: number The output of the motor. This is the torque currently being generated, in Newton meters. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: traction_control_enabled: boolean Whether automatic traction control is enabled. A wheel only has traction control if it is powered. :Attribute: Can be read or written :rtype: boolean .. attribute:: traction_control: number Setting for the traction control. Only takes effect if the wheel has automatic traction control enabled. A value between 0 and 5 inclusive. :Attribute: Can be read or written :rtype: number .. attribute:: drive_limiter: number Manual setting for the motor limiter. Only takes effect if the wheel has automatic traction control disabled. A value between 0 and 100 inclusive. :Attribute: Can be read or written :rtype: number .. attribute:: steerable: boolean Whether the wheel has steering. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: steering_enabled: boolean Whether the wheel steering is enabled. :Attribute: Can be read or written :rtype: boolean .. attribute:: steering_inverted: boolean Whether the wheel steering is inverted. :Attribute: Can be read or written :rtype: boolean .. attribute:: steering_angle_limit: number The steering angle limit. :Attribute: Can be read or written :rtype: number .. attribute:: steering_response_time: number Steering response time. :Attribute: Can be read or written :rtype: number .. attribute:: has_suspension: boolean Whether the wheel has suspension. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: suspension_spring_strength: number Suspension spring strength, as set in the editor. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: suspension_damper_strength: number Suspension damper strength, as set in the editor. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: broken: boolean Whether the wheel is broken. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: repairable: boolean Whether the wheel is repairable. :Attribute: Read-only, cannot be set :rtype: boolean .. attribute:: stress: number Current stress on the wheel. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: stress_tolerance: number Stress tolerance of the wheel. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: stress_percentage: number Current stress on the wheel as a percentage of its stress tolerance. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: deflection: number Current deflection of the wheel. :Attribute: Read-only, cannot be set :rtype: number .. attribute:: slip: number Current slip of the wheel. :Attribute: Read-only, cannot be set :rtype: number .. class:: WheelState The state of a wheel. See :attr:`SpaceCenter.Wheel.state`. .. data:: deployed Wheel is fully deployed. .. data:: retracted Wheel is fully retracted. .. data:: deploying Wheel is being deployed. .. data:: retracting Wheel is being retracted. .. data:: broken Wheel is broken. .. class:: MotorState The state of the motor on a powered wheel. See :attr:`SpaceCenter.Wheel.motor_state`. .. data:: idle The motor is idle. .. data:: running The motor is running. .. data:: disabled The motor is disabled. .. data:: inoperable The motor is inoperable. .. data:: not_enough_resources The motor does not have enough resources to run. .. _lua-api-parts-trees-of-parts: Trees of Parts -------------- Vessels in KSP are comprised of a number of parts, connected to one another in a *tree* structure. An example vessel is shown in Figure 1, and the corresponding tree of parts in Figure 2. The craft file for this example can also be :download:`downloaded here `. .. figure:: /images/api/parts.png :align: left :figwidth: 275 **Figure 1** -- Example parts making up a vessel. .. figure:: /images/api/parts-tree.png :align: right :figwidth: 275 **Figure 2** -- Tree of parts for the vessel in Figure 1. Arrows point from the parent part to the child part. .. container:: clearer .. Traversing the Tree ^^^^^^^^^^^^^^^^^^^ The tree of parts can be traversed using the attributes :attr:`SpaceCenter.Parts.root`, :attr:`SpaceCenter.Part.parent` and :attr:`SpaceCenter.Part.children`. The root of the tree is the same as the vessels *root part* (part number 1 in the example above) and can be obtained by calling :attr:`SpaceCenter.Parts.root`. A parts children can be obtained by calling :attr:`SpaceCenter.Part.children`. If the part does not have any children, :attr:`SpaceCenter.Part.children` returns an empty list. A parts parent can be obtained by calling :attr:`SpaceCenter.Part.parent`. If the part does not have a parent (as is the case for the root part), :attr:`SpaceCenter.Part.parent` returns ``nil``. The following Lua example uses these attributes to perform a depth-first traversal over all of the parts in a vessel: .. literalinclude:: /scripts/services/space-center/TreeTraversal.lua When this code is execute using the craft file for the example vessel pictured above, the following is printed out:: Command Pod Mk1 TR-18A Stack Decoupler FL-T400 Fuel Tank LV-909 Liquid Fuel Engine TR-18A Stack Decoupler FL-T800 Fuel Tank LV-909 Liquid Fuel Engine TT-70 Radial Decoupler FL-T400 Fuel Tank TT18-A Launch Stability Enhancer FTX-2 External Fuel Duct LV-909 Liquid Fuel Engine Aerodynamic Nose Cone TT-70 Radial Decoupler FL-T400 Fuel Tank TT18-A Launch Stability Enhancer FTX-2 External Fuel Duct LV-909 Liquid Fuel Engine Aerodynamic Nose Cone LT-1 Landing Struts LT-1 Landing Struts Mk16 Parachute .. _lua-api-parts-attachment-modes: Attachment Modes ^^^^^^^^^^^^^^^^ Parts can be attached to other parts either *radially* (on the side of the parent part) or *axially* (on the end of the parent part, to form a stack). For example, in the vessel pictured above, the parachute (part 2) is *axially* connected to its parent (the command pod -- part 1), and the landing leg (part 5) is *radially* connected to its parent (the fuel tank -- part 4). The root part of a vessel (for example the command pod -- part 1) does not have a parent part, so does not have an attachment mode. However, the part is consider to be *axially* attached to nothing. The following Lua example does a depth-first traversal as before, but also prints out the attachment mode used by the part: .. literalinclude:: /scripts/services/space-center/AttachmentModes.lua When this code is execute using the craft file for the example vessel pictured above, the following is printed out:: Command Pod Mk1 - axial TR-18A Stack Decoupler - axial FL-T400 Fuel Tank - axial LV-909 Liquid Fuel Engine - axial TR-18A Stack Decoupler - axial FL-T800 Fuel Tank - axial LV-909 Liquid Fuel Engine - axial TT-70 Radial Decoupler - radial FL-T400 Fuel Tank - radial TT18-A Launch Stability Enhancer - radial FTX-2 External Fuel Duct - radial LV-909 Liquid Fuel Engine - axial Aerodynamic Nose Cone - axial TT-70 Radial Decoupler - radial FL-T400 Fuel Tank - radial TT18-A Launch Stability Enhancer - radial FTX-2 External Fuel Duct - radial LV-909 Liquid Fuel Engine - axial Aerodynamic Nose Cone - axial LT-1 Landing Struts - radial LT-1 Landing Struts - radial Mk16 Parachute - axial .. _lua-api-parts-fuel-lines: Fuel Lines ---------- .. figure:: /images/api/parts-fuel-lines.png :align: right :figwidth: 200 **Figure 5** -- Fuel lines from the example in Figure 1. Fuel flows from the parts highlighted in green, into the part highlighted in blue. .. figure:: /images/api/parts-fuel-lines-tree.png :align: right :figwidth: 200 **Figure 4** -- A subset of the parts tree from Figure 2 above. Fuel lines are considered parts, and are included in the parts tree (for example, as pictured in Figure 4). However, the parts tree does not contain information about which parts fuel lines connect to. The parent part of a fuel line is the part from which it will take fuel (as shown in Figure 4) however the part that it will send fuel to is not represented in the parts tree. Figure 5 shows the fuel lines from the example vessel pictured earlier. Fuel line part 15 (in red) takes fuel from a fuel tank (part 11 -- in green) and feeds it into another fuel tank (part 9 -- in blue). The fuel line is therefore a child of part 11, but its connection to part 9 is not represented in the tree. The attributes :attr:`SpaceCenter.Part.fuel_lines_from` and :attr:`SpaceCenter.Part.fuel_lines_to` can be used to discover these connections. In the example in Figure 5, when :attr:`SpaceCenter.Part.fuel_lines_to` is called on fuel tank part 11, it will return a list of parts containing just fuel tank part 9 (the blue part). When :attr:`SpaceCenter.Part.fuel_lines_from` is called on fuel tank part 9, it will return a list containing fuel tank parts 11 and 17 (the parts colored green). .. _lua-api-parts-staging: Staging ------- .. figure:: /images/api/parts-staging.png :align: right :figwidth: 340 **Figure 6** -- Example vessel from Figure 1 with a staging sequence. Each part has two staging numbers associated with it: the stage in which the part is *activated* and the stage in which the part is *decoupled*. These values can be obtained using :attr:`SpaceCenter.Part.stage` and :attr:`SpaceCenter.Part.decouple_stage` respectively. For parts that are not activated by staging, :attr:`SpaceCenter.Part.stage` returns -1. For parts that are never decoupled, :attr:`SpaceCenter.Part.decouple_stage` returns a value of -1. Figure 6 shows an example staging sequence for a vessel. Figure 7 shows the stages in which each part of the vessel will be *activated*. Figure 8 shows the stages in which each part of the vessel will be *decoupled*. .. container:: clearer .. .. figure:: /images/api/parts-staging-activate.png :align: left :figwidth: 250 **Figure 7** -- The stage in which each part is *activated*. .. figure:: /images/api/parts-staging-decouple.png :align: right :figwidth: 250 **Figure 8** -- The stage in which each part is *decoupled*. .. container:: clearer ..