public JointPose jointAt(float time)
{
//check for single pose
if (poses.Count == 1)
{
return(poses[0]);
}
int idx = 0;
while (idx < poses.Count - 1 && time > poses[idx].time)
{
idx++;
}
//check for time past the last pose
if (time > poses[idx].time || idx == 0)
{
return(poses[idx]);
}
float interpolation = (time - poses[idx - 1].time) / (poses[idx].time - poses[idx - 1].time);
JointPose ret = new JointPose();
ret.position = Vector3.Lerp(poses[idx - 1].position, poses[idx].position, interpolation);
ret.rotation = Quaternion.Slerp(poses[idx - 1].rotation, poses[idx].rotation, interpolation);
return(ret);
}
public List <Matrix4> buildAnimationFrame(float time)
{
List <Matrix4> frame = new List <Matrix4>(skeleton.boneCount);
for (int i = 0; i < skeleton.boneCount; i++)
{
JointPose jp = channels[i].jointAt(time);
Matrix4 rel = Matrix4.CreateFromQuaternion(jp.rotation) * Matrix4.CreateTranslation(jp.position);
Matrix4 final = Matrix4.Identity;
Bone b = skeleton.myBones[i];
if (b.myParent == -1)
{
final = rel;
}
else
{
final = rel * frame[b.myParent];
}
frame.Add(final);
}
for (int i = 0; i < skeleton.boneCount; i++)
{
frame[i] = skeleton.myBones[i].myInvWorldBindMatrix * frame[i];
}
return(frame);
}
public void createNullAnimation()
{
//insert the null animation
Animation nullAni = new Animation();
nullAni.name = "null";
nullAni.fps = 0;
nullAni.loop = false;
nullAni.skeleton = skeleton;
for (int i = 0; i < skeleton.boneCount; i++)
{
AnimationChannel boneChannel = new AnimationChannel();
JointPose jp = new JointPose();
jp.position = Vector3.Zero;
jp.rotation = Quaternion.Identity;
boneChannel.poses.Add(jp);
nullAni.channels.Add(boneChannel);
}
animations["null"] = nullAni;
}