public Model3DGroup Render(double time)
{
var meshs = BaseModel.Clone();
time = time % (float)animation.DurationInTicks;
TransformNode(time, aiScene.RootNode, globalInverseTransform);
for (int meshId = 0; meshId < aiScene.MeshCount; meshId++)
{
if (!aiMeshVertexBoneInfos.ContainsKey(meshId))
{
continue;
}
var mesh = aiScene.Meshes[meshId];
var mesh3D = (meshs.Children[meshId] as GeometryModel3D).Geometry as MeshGeometry3D;
var vertextBoneWeights = aiMeshVertexBoneInfos[meshId];
for (int vertexId = 0; vertexId < mesh.VertexCount; vertexId++)
{
var ver = mesh.Vertices[vertexId];
if (vertextBoneWeights.ContainsKey(vertexId))
{
var vertexWeights = vertextBoneWeights[vertexId];
var boneTransform = mat4.Identity;
var sum = vertexWeights.Sum(m => m.Weight);
vertexWeights.ForEach(info =>
{
boneTransform += allBones[info.BoneName].finalTransformation * (float)(info.Weight / sum);
});
var animPosition = new vec4(ver.X, ver.Y, ver.Z, 1.0f);
animPosition = boneTransform * animPosition;
mesh3D.Positions[vertexId] = new Point3D(animPosition.x, animPosition.y, animPosition.z);
}
else
{
mesh3D.Positions[vertexId] = new Point3D(ver.X, ver.Y, ver.Z);
}
}
}
return(meshs);
}