/// <summary>
/// Rotates the given Position and Orientation around the Pivot Point, changing the Position and Orientation
/// </summary>
/// <param name="sRotationMatrix">The Rotation to apply to the object</param>
/// <param name="sPivotPoint">The Point to rotate the object around</param>
/// <param name="srPosition">The Position of the object (to be modified)</param>
/// <param name="srOrientation">The Orientation of the object (to be modified)</param>
public static void RotatePositionAndOrientation(Matrix sRotationMatrix, Vector3 sPivotPoint, ref Vector3 srPosition, ref Quaternion srOrientation)
{
// Rotate the Orientation about it's center to change its Orientation
srOrientation = Orientation3D.Rotate(sRotationMatrix, srOrientation);
// Rotate the Position around the specified Pivot Point
srPosition = PivotPoint3D.RotatePosition(sRotationMatrix, sPivotPoint, srPosition);
}
/// <summary>
/// Rotates the object around the Pivot Point, changing its Position, without
/// changing its Orientation
/// </summary>
/// <param name="sRotationMatrix">The Rotation to apply to the object, rotating it
/// around the Pivot Point</param>
public void RotatePosition(Matrix sRotationMatrix)
{
// If the object should rotate around a point other than it's center
if (PivotPoint != mcPositionData.Position)
{
// Rotate the Position around the Pivot Point
mcPositionData.Position = PivotPoint3D.RotatePosition(sRotationMatrix, PivotPoint, mcPositionData.Position);
}
}
/// <summary>
/// Copy the given PivotPoint3D object's data into this object's data
/// </summary>
/// <param name="cPivotPointToCopy">The PivotPoint3D object to copy from</param>
public void CopyFrom(PivotPoint3D cPivotPointToCopy)
{
PivotPoint = cPivotPointToCopy.PivotPoint;
PivotRotationalVelocity = cPivotPointToCopy.PivotRotationalVelocity;
PivotRotationalAcceleration = cPivotPointToCopy.PivotRotationalAcceleration;
mbRotateOrientationToo = cPivotPointToCopy.RotateOrientationToo;
mcPositionData = new Position3D(cPivotPointToCopy.PositionData);
mcOrientationData = new Orientation3D(cPivotPointToCopy.OrientationData);
}
/// <summary>
/// Initializes a new instance of the <see cref="ParticleEmitter"/> class.
/// </summary>
public ParticleEmitter()
{
// Initialize the Position, Orientation, and Pivot Point variables.
_positionData = new Position3DWithPreviousPosition();
_orientationData = new Orientation3DWithPreviousOrientation();
_pivotPointData = new PivotPoint3D(_positionData, _orientationData);
// Disable Lerping the Emitter on the first update, since the Previous Position and Orientation won't be set yet.
LerpEmittersPositionAndOrientationOnNextUpdate = false;
LerpEmittersPositionAndOrientation = true;
// Default any other properties.
Enabled = true;
EmitParticlesAutomatically = true;
// Assign a unique ID to this emitter.
ID = _particleEmitterCount++;
}
/// <summary>
/// Copies the given Emitter's values into this instance.
/// </summary>
/// <param name="emitterToCopy">The emitter to copy from.</param>
public void CopyFrom(ParticleEmitter emitterToCopy)
{
_positionData.CopyFrom(emitterToCopy._positionData);
_orientationData.CopyFrom(emitterToCopy._orientationData);
_pivotPointData = new PivotPoint3D(_positionData, _orientationData);
Enabled = emitterToCopy.Enabled;
EmitParticlesAutomatically = emitterToCopy.EmitParticlesAutomatically;
_burstNumberOfParticles = emitterToCopy._burstNumberOfParticles;
_burstTimeInSeconds = emitterToCopy._burstTimeInSeconds;
_particlesPerSecond = emitterToCopy._particlesPerSecond;
_secondsPerParticle = emitterToCopy._secondsPerParticle;
_timeElapsedSinceGeneratingLastParticle = emitterToCopy._timeElapsedSinceGeneratingLastParticle;
BurstComplete = emitterToCopy.BurstComplete;
}
/// <summary>
/// Copy Constructor
/// </summary>
/// <param name="cPivotPointToCopy">The PivotPoint3D object to copy</param>
public PivotPoint3D(PivotPoint3D cPivotPointToCopy)
{
CopyFrom(cPivotPointToCopy);
}
