static AnimationFile.Frame SeekFrame(AnimationFile.Bone bone, float time, int mode = 0)
{
foreach (AnimationFile.Frame frame in bone.Frames)
{
if (frame.Delay > time)
{
bool ok = false;
switch (mode)
{
case 1:
ok = frame.HasTransition;
break;
case 2:
ok = frame.HasScale;
break;
default:
ok = true;
break;
}
if (ok)
{
return(frame);
}
}
}
return(null);
}
static AnimationFile.Frame SeekFrameReverse(AnimationFile.Bone bone, float time, int mode = 0)
{
AnimationFile.Frame[] frames = (AnimationFile.Frame[])bone.Frames.Clone();
Array.Reverse(frames);
foreach (AnimationFile.Frame frame in frames)
{
if (frame.Delay <= time)
{
bool ok = false;
switch (mode)
{
case 1:
ok = frame.HasTransition;
break;
case 2:
ok = frame.HasScale;
break;
default:
ok = true;
break;
}
if (ok)
{
return(frame);
}
}
}
return(null);
}
static void ApplyAnimationFrame(Model.Branch[] branches, AnimationFile.Animation animation, float time = 0)
{
foreach (Model.Branch b in branches)
{
AnimationFile.Bone boneDef = animation[b.Name];
if (b.Parent != null)
{
if (boneDef != null)
{
Vector3 transition = Vector3.Zero;
Quaternion rotation = b.OriginalAngles;
float scale = b.OriginalScale;
AnimationFile.Frame frameFrom, frameTo;
float delta = 0;
frameFrom = SeekFrameReverse(boneDef, time, 0);
frameTo = SeekFrame(boneDef, time, 0);
if (frameFrom != null && frameTo != null)
{
delta = (time - frameFrom.Delay) / (frameTo.Delay - frameFrom.Delay);
rotation = Quaternion.Slerp(frameFrom.Rotation, frameTo.Rotation, delta); //Vector3.Lerp(frameFrom.Transition, frameTo.Transition, delta);
}
frameFrom = SeekFrameReverse(boneDef, time, 1);
frameTo = SeekFrame(boneDef, time, 1);
if (frameFrom != null && frameTo != null)
{
delta = (time - frameFrom.Delay) / (frameTo.Delay - frameFrom.Delay);
transition = Vector3.Lerp(frameFrom.Transition, frameTo.Transition, delta);
}
if (b.Name == "Root")
{
transition.Z = 0;
}
b.Position = b.OriginalPosition + transition;
b.Angles = rotation;
b.Scale = scale;
}
}
if (b.Children != null)
{
ApplyAnimationFrame(b.Children, animation, time);
}
}
}