internal void _SetSequence(Sequence seq, float toPos)
{
Shape shape = _shapeInstance.GetShape();
Assert.Fatal(shape != null && toPos >= 0.0f && toPos <= 1.0f, "Thread.SetSequence - Invalid shape handle, sequence number, or position.");
_shapeInstance.ClearTransition(this);
_sequence = seq;
_priority = _sequence.Priority;
_pos = toPos;
_makePath = _sequence.MakePath();
// 1.0f doesn't exist on cyclic sequences
if (_pos > 0.9999f && _sequence.IsCyclic())
_pos = 0.9999f;
// select keyframes
_SelectKeyframes(_pos, _sequence, out _keyNum1, out _keyNum2, out _keyPos);
}
void _SelectKeyframes(float pos, Sequence seq, out int k1, out int k2, out float kpos)
{
Shape shape = _shapeInstance.GetShape();
int numKF = seq.KeyframeCount;
float kf;
if (seq.IsCyclic())
{
// cyclic _sequence:
// _pos=0 and _pos=1 are equivalent, so we don't have a keyframe at _pos=1
// last keyframe corresponds to _pos=n/(n-1) up to (not including) _pos=1
// (where n == num keyframes)
Assert.Fatal(pos >= 0.0f && pos < 1.0f, "Thread.SelectKeyframes - Invalid thread position.");
kf = pos * (float)(numKF);
// Set _keyPos
kpos = kf - (int)kf;
// make sure compiler doing what we want...
Assert.Fatal(kpos >= 0.0f && kpos < 1.0f, "Thread.SelectKeyframes - Invalid thread position.");
int kfIdx1 = (int)kf;
// following assert could happen if pos1<1 && pos1==1...paradoxically...
Assert.Fatal(kfIdx1 <= seq.KeyframeCount, "Thread.SelectKeyframes - Invalid keyframe.");
int kfIdx2 = (kfIdx1 == seq.KeyframeCount - 1) ? 0 : kfIdx1 + 1;
k1 = kfIdx1;
k2 = kfIdx2;
}
else
{
// one-shot _sequence:
// _pos=0 and _pos=1 are now different, so we have a keyframe at _pos=1
// last keyframe corresponds to _pos=1
// rest of the keyframes are equally spaced (so 1/(n-1) _pos units long)
// (where n == num keyframes)
Assert.Fatal(pos >= 0.0f && pos <= 1.0f, "Thread.SelectKeyframes - Invalid thread position.");
if (pos == 1.0f)
{
kpos = 0.0f;
k1 = seq.KeyframeCount - 1;
k2 = seq.KeyframeCount - 1;
}
else
{
kf = pos * (float)(numKF - 1);
// Set _keyPos
kpos = kf - (int)kf;
int kfIdx1 = (int)kf;
// following assert could happen if pos1<1 && pos1==1...paradoxically...
Assert.Fatal(kfIdx1 < seq.KeyframeCount, "TSThread.SelectKeyFrames - Invalid keyframe.");
int kfIdx2 = kfIdx1 + 1;
k1 = kfIdx1;
k2 = kfIdx2;
}
}
}
/// <summary>
/// Sets a new sequence on the thread by transitioning to it.
/// </summary>
/// <param name="seq">The sequence to transition to.</param>
/// <param name="toPos">The position of the new sequence to start at.</param>
/// <param name="duration">The length of the transition.</param>
/// <param name="continuePlay">Whether or not to continue playing the thread.</param>
public void TransitionToSequence(Sequence seq, float toPos, float duration, bool continuePlay)
{
Assert.Fatal(duration > 0.0f, "Thread.TransitionToSequence - Must pass a positive non zero duration.");
Shape shape = _shapeInstance.GetShape();
// make sure these nodes are smoothly interpolated to new positions...
// basically, any node we controlled just prior to transition, or at any stage
// of the transition is interpolated. If we _start to transtion from A to B,
// but before reaching B we transtion to C, we Interpolate all nodes controlled
// by A, B, or C to their new position.
if (_transitionData._inTransition)
{
_transitionData._oldRotationNodes.Overlap(_sequence.DoesRotationMatter);
_transitionData._oldTranslationNodes.Overlap(_sequence.DoesTranslationMatter);
_transitionData._oldScaleNodes.Overlap(_sequence.DoesScaleMatter);
}
else
{
_transitionData._oldRotationNodes.Copy(ref _sequence.DoesRotationMatter);
_transitionData._oldTranslationNodes.Copy(ref _sequence.DoesTranslationMatter);
_transitionData._oldScaleNodes.Copy(ref _sequence.DoesScaleMatter);
}
// Set time characteristics of transition
_transitionData._oldSequence = _sequence;
_transitionData._oldPos = _pos;
_transitionData._duration = duration;
_transitionData._pos = 0.0f;
_transitionData._direction = _timeScale > 0.0f ? 1.0f : -1.0f;
_transitionData._targetScale = continuePlay ? 1.0f : 0.0f;
// in transition...
_transitionData._inTransition = true;
// Set target _sequence data
_sequence = seq;
_priority = _sequence.Priority;
_pos = toPos;
_makePath = _sequence.MakePath();
// 1.0f doesn't exist on cyclic sequences
if (_pos > 0.9999f && _sequence.IsCyclic())
_pos = 0.9999f;
// select keyframes
_SelectKeyframes(_pos, _sequence, out _keyNum1, out _keyNum2, out _keyPos);
}