Closest Approach#

type krpc_SpaceCenter_ClosestApproach_t#

A close approach between an orbit and a target orbit. Obtained by calling krpc_SpaceCenter_Orbit_NextClosestApproach() or krpc_SpaceCenter_Orbit_ClosestApproaches().

Note

The object names the approach rather than describing it once: each member estimates the time of closest approach from where the two orbits are now, and describes the state at that time. The estimate moves as the game runs, so members read at different moments can differ a little; members read in one physics tick all describe the same estimate. Relative quantities are the target relative to the orbiting object (target minus self).

The search runs forward over one orbital period from the current time. Once an approach has passed and the two orbits are moving apart, the closest point in that period is the current one, so the object reports the approach as now, at the present separation, until the orbits bring another one within range.

krpc_error_t krpc_SpaceCenter_ClosestApproach_UT(krpc_connection_t connection, double *returnValue, krpc_SpaceCenter_ClosestApproach_t instance)#

The universal time of the closest approach, in seconds.

krpc_error_t krpc_SpaceCenter_ClosestApproach_TimeTo(krpc_connection_t connection, double *returnValue, krpc_SpaceCenter_ClosestApproach_t instance)#

The time until the closest approach, in seconds.

krpc_error_t krpc_SpaceCenter_ClosestApproach_Distance(krpc_connection_t connection, double *returnValue, krpc_SpaceCenter_ClosestApproach_t instance)#

The distance between the objects at the closest approach, in meters.

krpc_error_t krpc_SpaceCenter_ClosestApproach_RelativeSpeed(krpc_connection_t connection, double *returnValue, krpc_SpaceCenter_ClosestApproach_t instance)#

The relative speed of the objects at the closest approach, in meters per second. This is the magnitude of krpc_SpaceCenter_ClosestApproach_RelativeVelocity(), and does not depend on the choice of reference frame.

krpc_error_t krpc_SpaceCenter_ClosestApproach_Vessel(krpc_connection_t connection, krpc_SpaceCenter_Vessel_t *returnValue, krpc_SpaceCenter_ClosestApproach_t instance)#

The vessel doing the approaching, or nullptr if it is not a vessel.

krpc_error_t krpc_SpaceCenter_ClosestApproach_Body(krpc_connection_t connection, krpc_SpaceCenter_CelestialBody_t *returnValue, krpc_SpaceCenter_ClosestApproach_t instance)#

The celestial body doing the approaching, or nullptr if it is not a celestial body.

krpc_error_t krpc_SpaceCenter_ClosestApproach_TargetVessel(krpc_connection_t connection, krpc_SpaceCenter_Vessel_t *returnValue, krpc_SpaceCenter_ClosestApproach_t instance)#

The vessel being approached, or nullptr if the target is not a vessel.

krpc_error_t krpc_SpaceCenter_ClosestApproach_TargetBody(krpc_connection_t connection, krpc_SpaceCenter_CelestialBody_t *returnValue, krpc_SpaceCenter_ClosestApproach_t instance)#

The celestial body being approached, or nullptr if the target is not a celestial body.

krpc_error_t krpc_SpaceCenter_ClosestApproach_Position(krpc_connection_t connection, krpc_tuple_double_double_double_t *returnValue, krpc_SpaceCenter_ClosestApproach_t instance, krpc_SpaceCenter_ReferenceFrame_t referenceFrame)#

The position of the orbiting object at the closest approach.

Parameters:

  • referenceFrame – The reference frame that the returned position vector is in. Defaults to the orbital reference frame of the object the orbit belongs to.

Returns:

The position as a vector.

krpc_error_t krpc_SpaceCenter_ClosestApproach_TargetPosition(krpc_connection_t connection, krpc_tuple_double_double_double_t *returnValue, krpc_SpaceCenter_ClosestApproach_t instance, krpc_SpaceCenter_ReferenceFrame_t referenceFrame)#

The position of the target object at the closest approach.

Parameters:

  • referenceFrame – The reference frame that the returned position vector is in. Defaults to the orbital reference frame of the object the orbit belongs to.

Returns:

The position as a vector.

krpc_error_t krpc_SpaceCenter_ClosestApproach_Velocity(krpc_connection_t connection, krpc_tuple_double_double_double_t *returnValue, krpc_SpaceCenter_ClosestApproach_t instance, krpc_SpaceCenter_ReferenceFrame_t referenceFrame)#

The velocity of the orbiting object at the closest approach.

Parameters:

  • referenceFrame – The reference frame that the returned velocity vector is in. Defaults to the orbital reference frame of the object the orbit belongs to.

Returns:

The velocity as a vector.

krpc_error_t krpc_SpaceCenter_ClosestApproach_TargetVelocity(krpc_connection_t connection, krpc_tuple_double_double_double_t *returnValue, krpc_SpaceCenter_ClosestApproach_t instance, krpc_SpaceCenter_ReferenceFrame_t referenceFrame)#

The velocity of the target object at the closest approach.

Parameters:

  • referenceFrame – The reference frame that the returned velocity vector is in. Defaults to the orbital reference frame of the object the orbit belongs to.

Returns:

The velocity as a vector.

krpc_error_t krpc_SpaceCenter_ClosestApproach_RelativePosition(krpc_connection_t connection, krpc_tuple_double_double_double_t *returnValue, krpc_SpaceCenter_ClosestApproach_t instance, krpc_SpaceCenter_ReferenceFrame_t referenceFrame)#

The position of the target relative to the orbiting object at the closest approach.

Parameters:

  • referenceFrame – The reference frame whose axes the returned vector is expressed in. Defaults to the orbital reference frame of the object the orbit belongs to.

Returns:

The relative position as a vector.

krpc_error_t krpc_SpaceCenter_ClosestApproach_RelativeVelocity(krpc_connection_t connection, krpc_tuple_double_double_double_t *returnValue, krpc_SpaceCenter_ClosestApproach_t instance, krpc_SpaceCenter_ReferenceFrame_t referenceFrame)#

The velocity of the target relative to the orbiting object at the closest approach.

Parameters:

  • referenceFrame – The reference frame whose axes the returned vector is expressed in. Defaults to the orbital reference frame of the object the orbit belongs to.

Returns:

The relative velocity as a vector.