static Mesh ExtractSkinnedMeshAttachment (string name, SkinnedMeshAttachment attachment, int slotIndex, SkeletonData skeletonData, List<Transform> boneList, Mesh mesh = null) {
Skeleton skeleton = new Skeleton(skeletonData);
skeleton.UpdateWorldTransform();
float[] floatVerts = new float[attachment.UVs.Length];
attachment.ComputeWorldVertices(skeleton.Slots[slotIndex], floatVerts);
Vector2[] uvs = ExtractUV(attachment.UVs);
Vector3[] verts = ExtractVerts(floatVerts);
int[] triangles = attachment.Triangles;
Color color = new Color(attachment.R, attachment.G, attachment.B, attachment.A);
if (mesh == null)
mesh = new Mesh();
mesh.triangles = new int[0];
mesh.vertices = verts;
mesh.uv = uvs;
mesh.triangles = triangles;
Color[] colors = new Color[verts.Length];
for (int i = 0; i < verts.Length; i++)
colors[i] = color;
mesh.colors = colors;
mesh.name = name;
mesh.RecalculateNormals();
mesh.RecalculateBounds();
//Handle weights and binding
Dictionary<int, BoneWeightContainer> weightTable = new Dictionary<int, BoneWeightContainer>();
System.Text.StringBuilder warningBuilder = new System.Text.StringBuilder();
int[] bones = attachment.Bones;
float[] weights = attachment.Weights;
for (int w = 0, v = 0, b = 0, n = bones.Length; v < n; w += 2) {
int nn = bones[v++] + v;
for (; v < nn; v++, b += 3) {
Transform boneTransform = boneList[bones[v]];
int vIndex = w / 2;
float weight = weights[b + 2];
BoneWeightContainer container;
if (weightTable.ContainsKey(vIndex))
container = weightTable[vIndex];
else {
container = new BoneWeightContainer();
weightTable.Add(vIndex, container);
}
container.Add(boneTransform, weight);
}
}
BoneWeight[] boneWeights = new BoneWeight[weightTable.Count];
for (int i = 0; i < weightTable.Count; i++) {
BoneWeight bw = new BoneWeight();
var container = weightTable[i];
var pairs = container.pairs.OrderByDescending(pair => pair.weight).ToList();
for (int b = 0; b < pairs.Count; b++) {
if (b > 3) {
if (warningBuilder.Length == 0)
warningBuilder.Insert(0, "[SkinnedMeshAttachment " + name + "]\r\nUnity only supports 4 weight influences per vertex! The 4 strongest influences will be used.\r\n");
warningBuilder.AppendFormat("{0} ignored on vertex {1}!\r\n", pairs[b].bone.name, i);
continue;
}
int boneIndex = boneList.IndexOf(pairs[b].bone);
float weight = pairs[b].weight;
switch (b) {
case 0:
bw.boneIndex0 = boneIndex;
bw.weight0 = weight;
break;
case 1:
bw.boneIndex1 = boneIndex;
bw.weight1 = weight;
break;
case 2:
bw.boneIndex2 = boneIndex;
bw.weight2 = weight;
break;
case 3:
bw.boneIndex3 = boneIndex;
bw.weight3 = weight;
break;
}
}
boneWeights[i] = bw;
}
Matrix4x4[] bindPoses = new Matrix4x4[boneList.Count];
for (int i = 0; i < boneList.Count; i++) {
bindPoses[i] = boneList[i].worldToLocalMatrix;
}
mesh.boneWeights = boneWeights;
mesh.bindposes = bindPoses;
string warningString = warningBuilder.ToString();
if (warningString.Length > 0)
Debug.LogWarning(warningString);
return mesh;
}
internal static Mesh ExtractWeightedMeshAttachment (string name, MeshAttachment attachment, int slotIndex, SkeletonData skeletonData, List<Transform> boneList, Mesh mesh = null) {
if (!attachment.IsWeighted())
throw new System.ArgumentException("Mesh is not weighted.", "attachment");
Skeleton skeleton = new Skeleton(skeletonData);
skeleton.UpdateWorldTransform();
float[] floatVerts = new float[attachment.WorldVerticesLength];
attachment.ComputeWorldVertices(skeleton.Slots.Items[slotIndex], floatVerts);
Vector2[] uvs = ExtractUV(attachment.UVs);
Vector3[] verts = ExtractVerts(floatVerts);
int[] triangles = attachment.Triangles;
Color color = new Color(attachment.R, attachment.G, attachment.B, attachment.A);
mesh = mesh ?? new Mesh();
mesh.triangles = new int[0];
mesh.vertices = verts;
mesh.uv = uvs;
mesh.triangles = triangles;
Color[] colors = new Color[verts.Length];
for (int i = 0; i < verts.Length; i++)
colors[i] = color;
mesh.colors = colors;
mesh.name = name;
mesh.RecalculateNormals();
mesh.RecalculateBounds();
// Handle weights and binding
var weightTable = new Dictionary<int, BoneWeightContainer>();
var warningBuilder = new System.Text.StringBuilder();
int[] bones = attachment.Bones;
float[] weights = attachment.Vertices;
for (int w = 0, v = 0, b = 0, n = bones.Length; v < n; w += 2) {
int nn = bones[v++] + v;
for (; v < nn; v++, b += 3) {
Transform boneTransform = boneList[bones[v]];
int vIndex = w / 2;
BoneWeightContainer container;
if (weightTable.ContainsKey(vIndex))
container = weightTable[vIndex];
else {
container = new BoneWeightContainer();
weightTable.Add(vIndex, container);
}
float weight = weights[b + 2];
container.Add(boneTransform, weight);
}
}
BoneWeight[] boneWeights = new BoneWeight[weightTable.Count];
for (int i = 0; i < weightTable.Count; i++) {
BoneWeight bw = new BoneWeight();
var container = weightTable[i];
var pairs = container.pairs.OrderByDescending(pair => pair.weight).ToList();
for (int b = 0; b < pairs.Count; b++) {
if (b > 3) {
if (warningBuilder.Length == 0)
warningBuilder.Insert(0, "[Weighted Mesh: " + name + "]\r\nUnity only supports 4 weight influences per vertex! The 4 strongest influences will be used.\r\n");
warningBuilder.AppendFormat("{0} ignored on vertex {1}!\r\n", pairs[b].bone.name, i);
continue;
}
int boneIndex = boneList.IndexOf(pairs[b].bone);
float weight = pairs[b].weight;
switch (b) {
case 0:
bw.boneIndex0 = boneIndex;
bw.weight0 = weight;
break;
case 1:
bw.boneIndex1 = boneIndex;
bw.weight1 = weight;
break;
case 2:
bw.boneIndex2 = boneIndex;
bw.weight2 = weight;
break;
case 3:
bw.boneIndex3 = boneIndex;
bw.weight3 = weight;
break;
}
}
boneWeights[i] = bw;
}
Matrix4x4[] bindPoses = new Matrix4x4[boneList.Count];
for (int i = 0; i < boneList.Count; i++) {
bindPoses[i] = boneList[i].worldToLocalMatrix;
}
mesh.boneWeights = boneWeights;
mesh.bindposes = bindPoses;
string warningString = warningBuilder.ToString();
if (warningString.Length > 0)
Debug.LogWarning(warningString);
return mesh;
}
