本文整理汇总了C#中Orbit.getAbsolutePositionAtUT方法的典型用法代码示例。如果您正苦于以下问题：C# Orbit.getAbsolutePositionAtUT方法的具体用法？C# Orbit.getAbsolutePositionAtUT怎么用？C# Orbit.getAbsolutePositionAtUT使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Orbit的用法示例。
在下文中一共展示了Orbit.getAbsolutePositionAtUT方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: projectFreefallEndTime
//In a landing, we are going to free fall some way and then either hit atmosphere or start
//decelerating with thrust. Until that happens we can project the orbit forward along a conic section.
//Given an orbit, this function figures out the time at which the free-fall phase will end
double projectFreefallEndTime(Orbit offsetOrbit, double startTime)
{
Vector3d currentPosition = offsetOrbit.getAbsolutePositionAtUT(startTime);
double currentAltitude = FlightGlobals.getAltitudeAtPos(currentPosition);
//check if we are already in the atmosphere or below the deceleration burn end altitude
if (currentAltitude < part.vessel.mainBody.maxAtmosphereAltitude || currentAltitude < decelerationEndAltitudeASL)
{
return vesselState.time;
}
Vector3d currentOrbitVelocity = offsetOrbit.getOrbitalVelocityAtUT(startTime);
Vector3d currentSurfaceVelocity = currentOrbitVelocity - part.vessel.mainBody.getRFrmVel(currentPosition);
//check if we already should be decelerating or will be momentarily:
//that is, if our velocity is downward and our speed is close to the nominal deceleration speed
if (Vector3d.Dot(currentSurfaceVelocity, currentPosition - part.vessel.mainBody.position) < 0
&& currentSurfaceVelocity.magnitude > 0.9 * decelerationSpeed(currentAltitude, vesselState.maxThrustAccel, part.vessel.mainBody))
{
return vesselState.time;
}
//check if the orbit reenters at all
double timeToPe = offsetOrbit.timeToPe;
Vector3d periapsisPosition = offsetOrbit.getAbsolutePositionAtUT(startTime + timeToPe);
if (FlightGlobals.getAltitudeAtPos(periapsisPosition) > part.vessel.mainBody.maxAtmosphereAltitude)
{
return startTime + timeToPe; //return the time of periapsis as a next best number
}
//determine time & velocity of reentry
double minReentryTime = startTime;
double maxReentryTime = startTime + timeToPe;
while (maxReentryTime - minReentryTime > 1.0)
{
double test = (maxReentryTime + minReentryTime) / 2.0;
Vector3d testPosition = offsetOrbit.getAbsolutePositionAtUT(test);
double testAltitude = FlightGlobals.getAltitudeAtPos(testPosition);
Vector3d testOrbitVelocity = offsetOrbit.getOrbitalVelocityAtUT(test);
Vector3d testSurfaceVelocity = testOrbitVelocity - part.vessel.mainBody.getRFrmVel(testPosition);
double testSpeed = testSurfaceVelocity.magnitude;
if (Vector3d.Dot(testSurfaceVelocity, testPosition - part.vessel.mainBody.position) < 0 &&
(testAltitude < part.vessel.mainBody.maxAtmosphereAltitude
|| testAltitude < decelerationEndAltitudeASL
|| testSpeed > 0.9 * decelerationSpeed(testAltitude, vesselState.maxThrustAccel, part.vessel.mainBody)))
{
maxReentryTime = test;
}
else
{
minReentryTime = test;
}
}
return (maxReentryTime + minReentryTime) / 2;
}