OrbitPropagator Class Reference

OrbitPropagator provides a mechanism to initialize an orbit and then determine the position and velocity at a future time. More...

Public Types
enum	PointType {   APOAPSIS , PERIAPSIS , ALTITUDE_1ST , ALTITUDE_2ND ,   ASCENDING_NODE , DESCENDING_NODE }

Public Member Functions
	OrbitPropagator (Vector3d r0, Vector3d v0, double time0, double mu)
double	PropToPoint (PointType pointType)
double	TimeOfFlight (Vector3d r1)
Vector3d	PropagateToTime (double physicsTime)
override string	ToString ()

Static Public Member Functions
static OrbitPropagator	GetPropagator (OrbitUniversal orbitU)
	Init from an OrbitUniversal.

Public Attributes
	Vector3d
	Determine the position, velocity and time at a specific type of future point.

Detailed Description

OrbitPropagator provides a mechanism to initialize an orbit and then determine the position and velocity at a future time.

The initialization can be done via:

• an OrbitUniversal
• a specific set of r, v, t

OrbitPropagator ALWAYS works in relative R, V values i.e. it assumes that the central mass is at (0,0,0)!

Future position/velocity is returned as a tuple when PropagateToTime(time) is called. This pos/vel is relative to the center object and not a world value!

This class does not require an NBody or game object to be present.

Member Function Documentation

GetPropagator()

static OrbitPropagator OrbitPropagator.GetPropagator ( OrbitUniversal  orbitU )

static

Init from an OrbitUniversal.

Parameters

orbitU

Returns

Member Data Documentation

Vector3d

OrbitPropagator.Vector3d

Determine the position, velocity and time at a specific type of future point.

Propagate the orbit to the specified time. Uses a modified version of the Vallado Kepler routine.

Parameters

pointType

Returns

the RELATIVE r, V and time for the specified orbit point

Parameters

physicsTime

Returns

Relative (position, velocity)

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The documentation for this class was generated from the following file:

• C:/Users/musgr/Documents/Unity/gravityengine/Assets/GravityEngine/Scripts/Orbits/OrbitPropagator.cs