/// <summary>
/// Integrate meshes to a single mesh
/// </summary>
/// <param name="model"></param>
/// <returns></returns>
public static MeshGroup CreateSingleMesh(this Model model, string name)
{
// new mesh to store result
var meshGroup = new MeshGroup(name);
var mesh = new Mesh
{
VertexBuffer = new VertexBuffer()
};
meshGroup.Meshes.Add(mesh);
var useCountList = GetNodeSkinUseCount(model);
// new Skin.
// Joints has include all joint
meshGroup.Skin = new Skin();
for (int i = 0; i < useCountList.Length; ++i)
{
if (useCountList[i] > 0)
{
// add joint that has bone weight
meshGroup.Skin.Joints.Add(model.Nodes[i]);
}
}
model.Skins.Clear();
model.Skins.Add(meshGroup.Skin);
// concatenate all mesh
foreach (var node in model.Root.Traverse().Skip(1))
{
var g = node.MeshGroup;
if (g != null)
{
foreach (var m in g.Meshes)
{
if (g.Skin != null && m.VertexBuffer.Joints != null && m.VertexBuffer.Weights != null)
{
var jointIndexMap = g.Skin.Joints.Select(x => meshGroup.Skin.Joints.IndexOf(x)).ToArray();
mesh.Append(m.VertexBuffer, m.IndexBuffer, m.Submeshes, m.MorphTargets, jointIndexMap);
}
else
{
var rootIndex = meshGroup.Skin.Joints.IndexOf(node);
mesh.Append(m.VertexBuffer, m.IndexBuffer, m.Submeshes, m.MorphTargets, null, rootIndex, node.Matrix);
}
}
}
}
foreach (var target in mesh.MorphTargets)
{
target.VertexBuffer.Resize(mesh.VertexBuffer.Count);
}
return(meshGroup);
}
