public AnimationPackage(BinaryReader reader)
: base(reader)
{
FileName = reader.ReadString(24);
ClipCount = reader.ReadInt32();
Clips = new Clip[ClipCount];
for (int i = 0; i < ClipCount; ++i)
{
var clip = Clips[i] = new Clip(reader);
_namedClips.Add(clip.Name, clip);
}
}
private static UnityEngine.AnimationClip Convert(Clip animation, FrameContainer frames,
out UVector3 rootStart, out UVector3 rootEnd)
{
var clip = new UnityEngine.AnimationClip();
clip.legacy = true;
var rotateAxes = new[] {
new { Name = "x", Mask = new UVector4(1f, 0f, 0f, 0f) },
new { Name = "y", Mask = new UVector4(0f, 1f, 0f, 0f) },
new { Name = "z", Mask = new UVector4(0f, 0f, 1f, 0f) },
new { Name = "w", Mask = new UVector4(0f, 0f, 0f, 1f) }
};
var translateAxes = new[] {
new { Name = "x", Mask = new UVector3(1f, 0f, 0f) },
new { Name = "y", Mask = new UVector3(0f, 1f, 0f) },
new { Name = "z", Mask = new UVector3(0f, 0f, 1f) },
};
var root = animation.Bones.FirstOrDefault(x => x.BoneId == 0);
if (root != null && root.FrameCount > 0) {
rootStart = Types.Convert(root.Frames.First().Translation);
rootEnd = Types.Convert(root.Frames.Last().Translation);
} else {
rootStart = rootEnd = UVector3.zero;
}
foreach (var bone in animation.Bones) {
var bFrames = bone.Frames;
var frame = frames.GetByBoneId(bone.BoneId);
string bonePath = frame.Path;
var axisAngle = bFrames.ToDictionary(x => x, x => {
var q = Types.Convert(x.Rotation);
float ang; UnityEngine.Vector3 axis;
q.ToAngleAxis(out ang, out axis);
return new UVector4(q.x, q.y, q.z, q.w);
});
foreach (var axis in rotateAxes) {
var keys = bFrames
.Select(x => new Keyframe(x.Time * TimeScale,
UVector4.Dot(axisAngle[x], axis.Mask)))
.ToArray();
clip.SetCurve(bonePath, typeof(Transform), "localRotation." + axis.Name,
new UnityEngine.AnimationCurve(keys));
}
var converted = bFrames.Select(x => Types.Convert(x.Translation)).ToArray();
if (!converted.Any(x => !x.Equals(UVector3.zero))) continue;
var anyVelocities = false;
var deltaVals = converted.Select((x, i) => {
var prev = Math.Max(0, i - 1);
var next = Math.Min(i + 1, converted.Length - 1);
var prevTime = bFrames[prev].Time * TimeScale;
var nextTime = bFrames[next].Time * TimeScale;
return prevTime == nextTime || !(anyVelocities = true) ? UVector3.zero
: (converted[next] - converted[prev]) / (nextTime - prevTime);
}).ToArray();
foreach (var translateAxis in translateAxes) {
var positions = bFrames
.Select((x, i) => new Keyframe(x.Time * TimeScale,
UVector3.Dot(frame.transform.localPosition + converted[i], translateAxis.Mask)))
.ToArray();
var deltas = bFrames.Select((x, i) => new Keyframe(x.Time * TimeScale,
UVector3.Dot(deltaVals[i], translateAxis.Mask))).ToArray();
clip.SetCurve(bonePath, typeof(Transform), "localPosition." + translateAxis.Name,
new UnityEngine.AnimationCurve(positions));
if (!anyVelocities) continue;
clip.SetCurve(bonePath, typeof(BFrame), "LocalVelocity." + translateAxis.Name,
new UnityEngine.AnimationCurve(deltas));
}
}
clip.wrapMode = WrapMode.Loop;
clip.EnsureQuaternionContinuity();
return clip;
}
private Animation(Clip anim, FrameContainer frames)
{
_clip = Convert(anim, frames, out _rootStart, out _rootEnd);
}
