private Vector3 BoneInitTransVec(_SkeletonData skl, _BoneData bone, Vector4 vec)
{
// 先将顶点通过T-POSE对应的骨骼矩阵转到骨骼空间，因为顶点的位置相对于骨骼位置是固定的，再乘以GetInitGlobalTransMatrix转到绑定效果的世界坐标位置
vec.w = 1; // 這裏要注意
Vector3 ret = bone.GetInitGlobalTransMatrix(skl) * bone.bindPose * vec;
return(ret);
}
// 自定義Asset
private static void ExportSklAsset(SkinnedMeshRenderer skl, string fileName)
{
if (skl == null)
{
return;
}
var bones = skl.bones;
if (bones != null && bones.Length > 0)
{
#if UNITY_EDITOR
var mesh = skl.sharedMesh;
if (mesh == null)
{
return;
}
var bindposes = mesh.bindposes;
if (bindposes == null || bindposes.Length <= 0)
{
return;
}
// 先遍历InstanceID对应INDEX
Dictionary <int, int> boneInstanceIDToIndexMap = new Dictionary <int, int>();
for (int i = 0; i < bones.Length; ++i)
{
var bone = bones[i];
boneInstanceIDToIndexMap[bone.GetInstanceID()] = i;
}
_SkeletonData sklData = ScriptableObject.CreateInstance <_SkeletonData>();
sklData.m_BoneDatas = new _BoneData[bones.Length];
for (int i = 0; i < bones.Length; ++i)
{
var bone = bones[i];
_BoneData boneData = new _BoneData();
boneData.initOffset = bone.localPosition;
boneData.initScale = bone.localScale;
boneData.initRot = bone.localRotation;
boneData.bindPose = mesh.bindposes[i];
boneData.name = bone.name;
if (bone.parent == null)
{
boneData.parentBone = -1;
sklData.m_RootBoneIndex = i;
}
else
{
int parentBoneIdx;
if (!boneInstanceIDToIndexMap.TryGetValue(bone.parent.GetInstanceID(), out parentBoneIdx))
{
parentBoneIdx = -2;
sklData.m_RootBoneIndex = i;
Debug.LogErrorFormat("bone: {0} parent: {1} not found", bone.name, bone.parent.name);
}
boneData.parentBone = parentBoneIdx;
}
sklData.m_BoneDatas[i] = boneData;
sklData.m_StartBoneUV = m_LastExportBoneUVStart;
}
for (int i = 0; i < sklData.m_BoneDatas.Length; ++i)
{
sklData.m_BoneDatas[i].InitGlobalMatrix(sklData);
}
if (skl.sharedMesh != null && skl.sharedMesh.isReadable)
{
if (skl.sharedMesh.vertexCount > 0)
{
var boneWeights = skl.sharedMesh.boneWeights;
if (boneWeights != null && boneWeights.Length > 0)
{
sklData.m_VertexBoneData = new _VertexBoneData[boneWeights.Length];
for (int i = 0; i < boneWeights.Length; ++i)
{
var vBoneData = new _VertexBoneData();
vBoneData.boneIndex1 = boneWeights[i].boneIndex0;
vBoneData.boneIndex2 = boneWeights[i].boneIndex1;
vBoneData.boneIndex3 = boneWeights[i].boneIndex2;
vBoneData.boneIndex4 = boneWeights[i].boneIndex3;
vBoneData.boneWeight1 = boneWeights[i].weight0;
vBoneData.boneWeight2 = boneWeights[i].weight1;
vBoneData.boneWeight3 = boneWeights[i].weight2;
sklData.m_VertexBoneData[i] = vBoneData;
}
}
}
}
else
{
Debug.LogError("SkinedMesh is not isReadable~! so _vertexBoneData not export");
}
AssetDatabase.CreateAsset(sklData, fileName);
#endif
}
}