/// <summary>
/// Animate the camera's view matrix from its current value when the activity starts
/// to the new destination matrix value.
/// </summary>
/// <param name="destination">The final matrix value.</param>
/// <param name="duration">The amount of time that the animation should take.</param>
/// <returns>
/// The newly scheduled activity, if the duration is greater than 0; else null.
/// </returns>
public virtual PTransformActivity AnimateViewToMatrix(PMatrix destination, long duration)
{
if (duration == 0) {
ViewMatrix = destination;
return null;
}
PTransformActivity ta = new PTransformActivity(duration, PUtil.DEFAULT_ACTIVITY_STEP_RATE, new PCameraTransformTarget(this), destination);
PRoot r = Root;
if (r != null) {
r.AddActivity(ta);
}
return ta;
}
/// <summary>
/// Animate this node's matrix from its current values when the activity
/// starts to the new values specified in the given matrix.
/// </summary>
/// <param name="destMatrix">The final matrix value.</param>
/// <param name="duration">The amount of time that the animation should take.</param>
/// <returns>The newly scheduled activity</returns>
/// <remarks>
/// If this node descends from the root then the activity will be scheduled,
/// else the returned activity should be scheduled manually. If two different
/// transform activities are scheduled for the same node at the same time,
/// they will both be applied to the node, but the last one scheduled will be
/// applied last on each frame, so it will appear to have replaced the
/// original. Generally you will not want to do that.
/// </remarks>
public virtual PTransformActivity AnimateToMatrix(PMatrix destMatrix, long duration)
{
PTransformActivity.Target t = new PNodeTransformTarget(this);
PTransformActivity ta = new PTransformActivity(duration, PUtil.DEFAULT_ACTIVITY_STEP_RATE, t, destMatrix);
AddActivity(ta);
return ta;
}