public static AnimationClip ConvertAnimationClip(glTF gltf, glTFAnimation animation, glTFNode root = null)
{
var clip = new AnimationClip();
clip.ClearCurves();
clip.legacy = true;
clip.name = animation.name;
clip.wrapMode = WrapMode.Loop;
foreach (var channel in animation.channels)
{
var relativePath = RelativePathFrom(gltf.nodes, root, gltf.nodes[channel.target.node]);
switch (channel.target.path)
{
case glTFAnimationTarget.PATH_TRANSLATION:
{
var sampler = animation.samplers[channel.sampler];
var input = gltf.GetArrayFromAccessor <float>(sampler.input);
var output = gltf.GetFloatArrayFromAccessor(sampler.output);
AnimationImporterUtil.SetAnimationCurve(
clip,
relativePath,
new string[] { "localPosition.x", "localPosition.y", "localPosition.z" },
input,
output,
sampler.interpolation,
typeof(Transform),
(values, last) =>
{
Vector3 temp = new Vector3(values[0], values[1], values[2]);
return(temp.ReverseZ().ToArray());
}
);
}
break;
case glTFAnimationTarget.PATH_ROTATION:
{
var sampler = animation.samplers[channel.sampler];
var input = gltf.GetArrayFromAccessor <float>(sampler.input);
var output = gltf.GetFloatArrayFromAccessor(sampler.output);
AnimationImporterUtil.SetAnimationCurve(
clip,
relativePath,
new string[] { "localRotation.x", "localRotation.y", "localRotation.z", "localRotation.w" },
input,
output,
sampler.interpolation,
typeof(Transform),
(values, last) =>
{
Quaternion currentQuaternion = new Quaternion(values[0], values[1], values[2], values[3]);
Quaternion lastQuaternion = new Quaternion(last[0], last[1], last[2], last[3]);
return(AnimationImporterUtil.GetShortest(lastQuaternion, currentQuaternion.ReverseZ()).ToArray());
}
);
clip.EnsureQuaternionContinuity();
}
break;
case glTFAnimationTarget.PATH_SCALE:
{
var sampler = animation.samplers[channel.sampler];
var input = gltf.GetArrayFromAccessor <float>(sampler.input);
var output = gltf.GetFloatArrayFromAccessor(sampler.output);
AnimationImporterUtil.SetAnimationCurve(
clip,
relativePath,
new string[] { "localScale.x", "localScale.y", "localScale.z" },
input,
output,
sampler.interpolation,
typeof(Transform),
(values, last) => values);
}
break;
case glTFAnimationTarget.PATH_WEIGHT:
{
var node = gltf.nodes[channel.target.node];
var mesh = gltf.meshes[node.mesh];
var primitive = mesh.primitives.FirstOrDefault();
var targets = primitive.targets;
if (!gltf_mesh_extras_targetNames.TryGet(mesh, out List <string> targetNames))
{
throw new Exception("glTF BlendShape Animation. targetNames invalid.");
}
var keyNames = targetNames
.Where(x => !string.IsNullOrEmpty(x))
.Select(x => "blendShape." + x)
.ToArray();
var sampler = animation.samplers[channel.sampler];
var input = gltf.GetArrayFromAccessor <float>(sampler.input);
var output = gltf.GetArrayFromAccessor <float>(sampler.output);
AnimationImporterUtil.SetAnimationCurve(
clip,
relativePath,
keyNames,
input,
output,
sampler.interpolation,
typeof(SkinnedMeshRenderer),
(values, last) =>
{
for (int j = 0; j < values.Length; j++)
{
values[j] *= 100.0f;
}
return(values);
});
}
break;
default:
Debug.LogWarningFormat("unknown path: {0}", channel.target.path);
break;
}
}
return(clip);
}