public Submesh3D Clone()
{
var clone = new Submesh3D();
clone.Mesh = Mesh.ShallowClone();
clone.BoneNames = new List <string>(BoneNames);
clone.BoneBindPoses = new List <Matrix44>(BoneBindPoses);
clone.Material = Material.Clone();
clone.Owner = null;
return(clone);
}
public static Submesh3D Combine(params Submesh3D[] submeshes)
{
var firstMesh = submeshes.First();
var newSubmesh = new Submesh3D {
Material = firstMesh.Material
};
var numVertices = submeshes.Select(sm => sm.Mesh).Sum(m => m.Vertices.Length);
var numIndices = submeshes.Select(sm => sm.Mesh).Sum(m => m.Indices.Length);
var outVertices = new Mesh3D.Vertex[numVertices];
var outIndices = new ushort[numIndices];
var currentVertex = 0;
var currentIndex = 0;
foreach (var sm in submeshes)
{
var m = sm.Mesh;
var indices = m.Indices;
for (var i = currentIndex; i < currentIndex + indices.Length; i++)
{
outIndices[i] = (ushort)(indices[i - currentIndex] + currentVertex);
}
var idx = (byte)newSubmesh.BoneNames.Count;
for (var i = 0; i < sm.BoneNames.Count; i++)
{
newSubmesh.BoneNames.Add(sm.BoneNames[i]);
newSubmesh.BoneBindPoses.Add(sm.BoneBindPoses[i]);
}
currentIndex += indices.Length;
var vertices = m.Vertices;
vertices.CopyTo(outVertices, currentVertex);
for (var j = currentVertex; j < currentVertex + vertices.Length; j++)
{
var bi = outVertices[j].BlendIndices;
bi.Index0 += idx;
bi.Index1 += idx;
bi.Index2 += idx;
bi.Index3 += idx;
outVertices[j].BlendIndices = bi;
}
currentVertex += vertices.Length;
}
newSubmesh.Mesh = new Mesh <Mesh3D.Vertex> {
Vertices = outVertices,
Indices = outIndices,
AttributeLocations = firstMesh.Mesh.AttributeLocations,
DirtyFlags = MeshDirtyFlags.All
};
return(newSubmesh);
}
private void MergeMeshes(Dictionary <int, List <Mesh3D> > map, Node3D model)
{
const int meshLimit = ushort.MaxValue;
const int bonesLimit = 50;
if (map.Count == 0)
{
return;
}
foreach (var pair in map)
{
var materialsMap = new Dictionary <IMaterial, Dictionary <Mesh3D, List <Submesh3D> > >();
foreach (var mesh in pair.Value)
{
foreach (var submesh in mesh.Submeshes)
{
var material = submesh.Material;
if (!materialsMap.ContainsKey(material))
{
materialsMap[material] = new Dictionary <Mesh3D, List <Submesh3D> >();
}
if (!materialsMap[material].ContainsKey(mesh))
{
materialsMap[material][mesh] = new List <Submesh3D>();
}
materialsMap[material][mesh].Add(submesh);
}
}
foreach (var meshDescriptor in materialsMap.Values)
{
var first = meshDescriptor.First().Key;
var newMesh = new Mesh3D {
Opaque = first.Opaque,
CullMode = first.CullMode,
SkinningMode = first.SkinningMode,
HitTestTarget = first.HitTestTarget
};
Submesh3D curSubmesh = null;
foreach (var meshAndSubmeshes in meshDescriptor)
{
var meshIdx = 0;
while (meshIdx < meshAndSubmeshes.Value.Count)
{
var submeshToMerge = meshAndSubmeshes.Value[meshIdx];
var meshLocalTransform = meshAndSubmeshes.Key.LocalTransform;
MeshUtils.TransformVertices(submeshToMerge.Mesh, (ref Mesh3D.Vertex v) => {
v.Pos = meshLocalTransform.TransformVector(v.Pos);
});
if (curSubmesh == null)
{
curSubmesh = submeshToMerge;
meshAndSubmeshes.Value.RemoveAt(meshIdx);
meshIdx++;
continue;
}
if (curSubmesh.Mesh.Indices.Length + submeshToMerge.Mesh.Indices.Length < meshLimit &&
curSubmesh.BoneNames.Count + submeshToMerge.BoneNames.Count < bonesLimit
)
{
curSubmesh = Combine(curSubmesh, submeshToMerge);
meshAndSubmeshes.Value.RemoveAt(meshIdx);
}
else
{
newMesh.Submeshes.Add(curSubmesh);
curSubmesh = null;
}
}
newMesh.Id += (newMesh.Id == null ? "" : "|") + meshAndSubmeshes.Key.Id;
}
newMesh.Submeshes.Add(curSubmesh);
model.AddNode(newMesh);
}
foreach (var mesh in materialsMap.Values.SelectMany(kv => kv.Keys))
{
mesh.UnlinkAndDispose();
}
}
}