private void SaveIndices(UnityEngine.Mesh mesh, MeshPrimitive primitive, int i, ref EntryBufferView bufferView)
{
primitive.Mode = DrawMode.Triangles;
if (_mesh2indices.ContainsKey(mesh) && _mesh2indices[mesh].ContainsKey(i))
{
primitive.Indices = _mesh2indices[mesh][i];
return;
}
if (bufferView == null)
{
bufferView = CreateStreamBufferView(mesh.name + "-indices");
}
primitive.Indices = AccessorToId(
ExporterUtils.PackToBuffer(bufferView.streamBuffer, mesh.GetTriangles(i), GLTFComponentType.UnsignedShort, (int[] data, int index) => {
var offset = index % 3;
return data[offset == 0 ? index : offset == 1 ? index + 1 : index - 1];
}),
bufferView
);
primitive.Indices.Value.Name += "-" + i;
if (!_mesh2indices.ContainsKey(mesh))
{
_mesh2indices.Add(mesh, new Dictionary<int, AccessorId>());
}
_mesh2indices[mesh].Add(i, primitive.Indices);
}
public SkinId SaveSkin(Transform tr)
{
if (root.Skins == null)
{
root.Skins = new List<GLTF.Schema.Skin>();
}
var skinMesh = tr.GetComponent<SkinnedMeshRenderer>();
if (_skin2ID.ContainsKey(skinMesh))
{
return _skin2ID[skinMesh];
}
var node = tr2node[tr];
var skin = new Skin();
skin.Name = "skeleton-" + skinMesh.rootBone.name + "-" + tr.name;
skin.Skeleton = new NodeId { Id = root.Nodes.IndexOf(node), Root = root };
skin.Joints = new List<NodeId>();
foreach (var bone in skinMesh.bones)
{
if (!tr2node.ContainsKey(bone))
{
throw new Exception("You are expoting a skinned mesh '" + node.Name + "', but not select bones!");
}
skin.Joints.Add(new NodeId { Id = root.Nodes.IndexOf(tr2node[bone]) });
}
// Create invBindMatrices accessor
var bufferView = CreateStreamBufferView("invBind-" + skinMesh.rootBone.name + "-" + tr.name);
Matrix4x4[] invBindMatrices = new Matrix4x4[skin.Joints.Count];
for (int i = 0; i < skinMesh.bones.Length; ++i)
{
// Generates inverseWorldMatrix in right-handed coordinate system
Matrix4x4 invBind = skinMesh.sharedMesh.bindposes[i];
invBindMatrices[i] = Utils.ConvertMat4LeftToRightHandedness(ref invBind);
}
skin.InverseBindMatrices = AccessorToId(
ExporterUtils.PackToBuffer(bufferView.streamBuffer, invBindMatrices, GLTFComponentType.Float),
bufferView
);
root.Skins.Add(skin);
var id = new SkinId { Id = root.Skins.Count - 1, Root = root };
_skin2ID.Add(skinMesh, id);
return id;
}
private List<string> BakeAnimationClip(GLTF.Schema.Animation anim, Transform tr, AnimationClip clip)
{
var needGenerate = !_animClip2Accessors.ContainsKey(clip);
Dictionary<string, Dictionary<GLTFAnimationChannelPath, AnimationCurve[]>> curves = null;
Dictionary<string, bool> rotationIsEuler = null;
if (needGenerate)
{
curves = new Dictionary<string, Dictionary<GLTFAnimationChannelPath, AnimationCurve[]>>();
rotationIsEuler = new Dictionary<string, bool>();
}
List<string> targets = new List<string>();
foreach (var binding in AnimationUtility.GetCurveBindings(clip))
{
var path = binding.path;
var curve = AnimationUtility.GetEditorCurve(clip, binding);
if (!curves.ContainsKey(path))
{
targets.Add(path);
if (needGenerate)
{
curves.Add(path, new Dictionary<GLTFAnimationChannelPath, AnimationCurve[]>());
rotationIsEuler.Add(path, false);
}
}
if (!needGenerate)
{
continue;
}
var current = curves[path];
if (binding.propertyName.Contains("m_LocalPosition"))
{
if (!current.ContainsKey(GLTFAnimationChannelPath.translation))
{
current.Add(GLTFAnimationChannelPath.translation, new AnimationCurve[3]);
}
if (binding.propertyName.Contains(".x"))
current[GLTFAnimationChannelPath.translation][0] = curve;
else if (binding.propertyName.Contains(".y"))
current[GLTFAnimationChannelPath.translation][1] = curve;
else if (binding.propertyName.Contains(".z"))
current[GLTFAnimationChannelPath.translation][2] = curve;
}
else if (binding.propertyName.Contains("m_LocalScale"))
{
if (!current.ContainsKey(GLTFAnimationChannelPath.scale))
{
current.Add(GLTFAnimationChannelPath.scale, new AnimationCurve[3]);
}
if (binding.propertyName.Contains(".x"))
current[GLTFAnimationChannelPath.scale][0] = curve;
else if (binding.propertyName.Contains(".y"))
current[GLTFAnimationChannelPath.scale][1] = curve;
else if (binding.propertyName.Contains(".z"))
current[GLTFAnimationChannelPath.scale][2] = curve;
}
else if (binding.propertyName.ToLower().Contains("localrotation"))
{
if (!current.ContainsKey(GLTFAnimationChannelPath.rotation))
{
current.Add(GLTFAnimationChannelPath.rotation, new AnimationCurve[4]);
}
if (binding.propertyName.Contains(".x"))
current[GLTFAnimationChannelPath.rotation][0] = curve;
else if (binding.propertyName.Contains(".y"))
current[GLTFAnimationChannelPath.rotation][1] = curve;
else if (binding.propertyName.Contains(".z"))
current[GLTFAnimationChannelPath.rotation][2] = curve;
else if (binding.propertyName.Contains(".w"))
current[GLTFAnimationChannelPath.rotation][3] = curve;
}
// Takes into account 'localEuler', 'localEulerAnglesBaked' and 'localEulerAnglesRaw'
else if (binding.propertyName.ToLower().Contains("localeuler"))
{
if (!current.ContainsKey(GLTFAnimationChannelPath.rotation))
{
current.Add(GLTFAnimationChannelPath.rotation, new AnimationCurve[3]);
rotationIsEuler[path] = true;
}
if (binding.propertyName.Contains(".x"))
current[GLTFAnimationChannelPath.rotation][0] = curve;
else if (binding.propertyName.Contains(".y"))
current[GLTFAnimationChannelPath.rotation][1] = curve;
else if (binding.propertyName.Contains(".z"))
current[GLTFAnimationChannelPath.rotation][2] = curve;
}
//todo: weights
}
if (!needGenerate)
{
return targets;
}
var bufferView = CreateStreamBufferView("animation-" + anim.Name);
int nbSamples = (int)(clip.length * 30);
float deltaTime = clip.length / nbSamples;
var accessors = new List<Dictionary<GLTFAnimationChannelPath, AccessorId>>();
_animClip2Accessors.Add(clip, accessors);
foreach (var path in curves.Keys)
{
var accessor = new Dictionary<GLTFAnimationChannelPath, AccessorId>();
accessors.Add(accessor);
float[] times = new float[nbSamples];
Vector3[] translations = null;
Vector3[] scales = null;
Vector4[] rotations = null;
foreach (var curve in curves[path])
{
if (curve.Key == GLTFAnimationChannelPath.translation)
{
translations = new Vector3[nbSamples];
}
else if (curve.Key == GLTFAnimationChannelPath.scale)
{
scales = new Vector3[nbSamples];
}
else if (curve.Key == GLTFAnimationChannelPath.rotation)
{
rotations = new Vector4[nbSamples];
}
}
for (int i = 0; i < nbSamples; i += 1)
{
var currentTime = i * deltaTime;
times[i] = currentTime;
if (translations != null)
{
var curve = curves[path][GLTFAnimationChannelPath.translation];
translations[i] = new Vector3(curve[0].Evaluate(currentTime), curve[1].Evaluate(currentTime), curve[2].Evaluate(currentTime));
}
if (scales != null)
{
var curve = curves[path][GLTFAnimationChannelPath.scale];
scales[i] = new Vector3(curve[0].Evaluate(currentTime), curve[1].Evaluate(currentTime), curve[2].Evaluate(currentTime));
}
if (rotations != null)
{
var curve = curves[path][GLTFAnimationChannelPath.rotation];
if (rotationIsEuler[path])
{
var q = Quaternion.Euler(curve[0].Evaluate(currentTime), curve[1].Evaluate(currentTime), curve[2].Evaluate(currentTime));
rotations[i] = new Vector4(q.x, q.y, q.z, q.w);
} else
{
rotations[i] = new Vector4(curve[0].Evaluate(currentTime), curve[1].Evaluate(currentTime), curve[2].Evaluate(currentTime), curve[3].Evaluate(currentTime));
}
}
}
if (!_animClip2TimeAccessor.ContainsKey(clip))
{
var timeView = ExporterUtils.PackToBuffer(bufferView.streamBuffer, times, GLTFComponentType.Float);
_animClip2TimeAccessor.Add(clip, AccessorToId(timeView, bufferView));
timeView.Name += "-times";
}
AccessorId id = null;
if (translations != null)
{
id = AccessorToId(ExporterUtils.PackToBuffer(bufferView.streamBuffer, translations, GLTFComponentType.Float, (Vector3[] data, int i) => { return Utils.ConvertVector3LeftToRightHandedness(ref data[i]); }), bufferView);
accessor.Add(GLTFAnimationChannelPath.translation, id);
id.Value.Name += "-" + path + "-" + "translation";
}
if (scales != null)
{
id = AccessorToId(ExporterUtils.PackToBuffer(bufferView.streamBuffer, scales, GLTFComponentType.Float), bufferView);
accessor.Add(GLTFAnimationChannelPath.scale, id);
id.Value.Name += "-" + path + "-" + "scales";
}
if (rotations != null)
{
id = AccessorToId(ExporterUtils.PackToBuffer(bufferView.streamBuffer, rotations, GLTFComponentType.Float, (Vector4[] data, int i) => { return Utils.ConvertVector4LeftToRightHandedness(ref data[i]); }), bufferView);
accessor.Add(GLTFAnimationChannelPath.rotation, id);
id.Value.Name += "-" + path + "-" + "rotations";
}
}
return targets;
}
private AccessorId PackAttrToBufferShort<DataType>(EntryBufferView bufferView, DataType[] data, int offset, Func<DataType[], int, DataType> getValueByIndex = null)
{
var accessor = ExporterUtils.PackToBuffer(bufferView.byteBuffer, data, GLTFComponentType.UnsignedShort, offset, bufferView.view.ByteStride, getValueByIndex);
return AccessorToId(accessor, bufferView);
}
