/// <summary>
/// Gets the current transform for the given BonePose object in the animation.
/// This is only called when a bone pose is affected by the current animation.
/// </summary>
/// <param name="pose">The BonePose object querying for the current transform in
/// the animation.</param>
/// <returns>The current transform of the bone.</returns>
public virtual Matrix GetCurrentBoneTransform(BonePose pose)
{
AnimationChannelCollection channels = animation.AnimationChannels;
BoneKeyframeCollection channel = channels[pose.Name];
int boneIndex = channel.GetIndexByTime(elapsedTime);
return(channel[boneIndex].Transform);
}
/// <summary>
/// Returns the current transform for a bone.
/// </summary>
/// <param name="pose">The bone.</param>
/// <returns>The bone's current transform.</returns>
public override Matrix GetCurrentBoneTransform(BonePose pose)
{
BoneKeyframeCollection channel = base.AnimationSource.AnimationChannels[
pose.Name];
int curIndex = channel.GetIndexByTime(base.ElapsedTime);
if (interpMethod == InterpolationMethod.None)
{
return(channel[curIndex].Transform);
}
int nextIndex = curIndex + 1;
if (nextIndex >= channel.Count)
{
return(channel[curIndex].Transform);
}
// Numerator of the interpolation factor
double interpNumerator = (double)(ElapsedTime - channel[curIndex].Time);
// Denominator of the interpolation factor
double interpDenom = (double)(channel[nextIndex].Time
- channel[curIndex].Time);
// The interpolation factor, or amount to interpolate between the current
// and next frame
double interpAmount = interpNumerator / interpDenom;
curTransform = channel[curIndex].Transform;
nextTransform = channel[nextIndex].Transform;
if (interpMethod == InterpolationMethod.Linear)
{
Matrix.Lerp(ref curTransform, ref nextTransform,
(float)interpAmount, out transform);
}
else
{
Util.SlerpMatrix(ref curTransform, ref nextTransform,
(float)interpAmount, out transform);
}
return(transform);
}
