Mesh Combine(Mesh mesh)
{
Mesh combinedMesh = InstanceMesh(mesh);
SubmeshInfo[] initialSubmeshData = new SubmeshInfo[mesh.subMeshCount];
for (int submeshIndex = 0; submeshIndex < mesh.subMeshCount; submeshIndex++)
{
initialSubmeshData[submeshIndex].triangles = new List <int>();
int[] submeshTriangles = mesh.GetTriangles(submeshIndex);
for (int triangleIndex = 0; triangleIndex < submeshTriangles.Length; triangleIndex++)
{
initialSubmeshData[submeshIndex].triangles.Add(submeshTriangles[triangleIndex]);
}
}
List <int> affectedSubmeshes = new List <int>();
SubmeshInfo[] combinedSubInfo = new SubmeshInfo[submeshesToCombine.Length];
for (int combinedSubmeshesIndex = 0; combinedSubmeshesIndex < submeshesToCombine.Length; combinedSubmeshesIndex++)
{
combinedSubInfo[combinedSubmeshesIndex].triangles = new List <int>();
for (int affectedSubmeshesIndex = 0; affectedSubmeshesIndex < submeshesToCombine[combinedSubmeshesIndex].submeshesToCombine.Length; affectedSubmeshesIndex++)
{
int affectedSubmesh = submeshesToCombine[combinedSubmeshesIndex].submeshesToCombine[affectedSubmeshesIndex];
combinedSubInfo[combinedSubmeshesIndex].triangles.AddRange(initialSubmeshData[affectedSubmesh].triangles);
affectedSubmeshes.Add(affectedSubmesh);
}
}
int unaffectedSubmeshCount = mesh.subMeshCount - affectedSubmeshes.Count;
int newSubmeshCount = submeshesToCombine.Length + unaffectedSubmeshCount;
combinedMesh.subMeshCount = newSubmeshCount;
int currentSubmesh = 0;
for (int combinedSubmeshesIndex = 0; combinedSubmeshesIndex < combinedSubInfo.Length; combinedSubmeshesIndex++)
{
combinedMesh.SetTriangles(combinedSubInfo[combinedSubmeshesIndex].triangles, currentSubmesh);
currentSubmesh++;
}
for (int originalSubmeshIndex = 0; originalSubmeshIndex < mesh.subMeshCount; originalSubmeshIndex++)
{
if (!affectedSubmeshes.Contains(originalSubmeshIndex))
{
combinedMesh.SetTriangles(initialSubmeshData[originalSubmeshIndex].triangles, currentSubmesh);
currentSubmesh++;
}
}
return(combinedMesh);
}
public int Compare(SubmeshInfo x, SubmeshInfo y)
{
int result = x.VertexBufferIndex - y.VertexBufferIndex;
if (result == 0)
{
result = x.MaterialIndex - y.MaterialIndex;
}
if (result == 0)
{
result = x.OriginalIndex - y.OriginalIndex;
}
return(result);
}
Mesh Combine (Mesh mesh)
{
Mesh combinedMesh = InstanceMesh(mesh);
SubmeshInfo[] initialSubmeshData = new SubmeshInfo[mesh.subMeshCount];
for (int submeshIndex = 0; submeshIndex < mesh.subMeshCount; submeshIndex++)
{
initialSubmeshData[submeshIndex].triangles = new List<int>();
int[] submeshTriangles = mesh.GetTriangles(submeshIndex);
for (int triangleIndex = 0; triangleIndex < submeshTriangles.Length; triangleIndex++)
{
initialSubmeshData[submeshIndex].triangles.Add(submeshTriangles[triangleIndex]);
}
}
List<int> affectedSubmeshes = new List<int>();
SubmeshInfo[] combinedSubInfo = new SubmeshInfo[submeshesToCombine.Length];
for (int combinedSubmeshesIndex = 0; combinedSubmeshesIndex < submeshesToCombine.Length; combinedSubmeshesIndex++)
{
combinedSubInfo[combinedSubmeshesIndex].triangles = new List<int>();
for (int affectedSubmeshesIndex = 0; affectedSubmeshesIndex < submeshesToCombine[combinedSubmeshesIndex].submeshesToCombine.Length; affectedSubmeshesIndex++)
{
int affectedSubmesh = submeshesToCombine[combinedSubmeshesIndex].submeshesToCombine[affectedSubmeshesIndex];
combinedSubInfo[combinedSubmeshesIndex].triangles.AddRange(initialSubmeshData[affectedSubmesh].triangles);
affectedSubmeshes.Add(affectedSubmesh);
}
}
int unaffectedSubmeshCount = mesh.subMeshCount - affectedSubmeshes.Count;
int newSubmeshCount = submeshesToCombine.Length + unaffectedSubmeshCount;
combinedMesh.subMeshCount = newSubmeshCount;
int currentSubmesh = 0;
for (int combinedSubmeshesIndex = 0; combinedSubmeshesIndex < combinedSubInfo.Length; combinedSubmeshesIndex++)
{
combinedMesh.SetTriangles(combinedSubInfo[combinedSubmeshesIndex].triangles, currentSubmesh);
currentSubmesh++;
}
for (int originalSubmeshIndex = 0; originalSubmeshIndex < mesh.subMeshCount; originalSubmeshIndex++)
{
if (!affectedSubmeshes.Contains(originalSubmeshIndex))
{
combinedMesh.SetTriangles(initialSubmeshData[originalSubmeshIndex].triangles, currentSubmesh);
currentSubmesh++;
}
}
return combinedMesh;
}
// Build a SubmeshInfo for each GeometryContent.
private SubmeshInfo[] BuildSubmeshInfos(MeshContent mesh, List <MeshContent> inputMorphs)
{
bool hasMorphTargets = (inputMorphs != null && inputMorphs.Count > 0);
// A lookup table that maps each material to its index.
// The key is the name of the XML file (string) or the local material (MaterialContent).
var materialLookupTable = new Dictionary <object, int>();
int numberOfSubmeshes = mesh.Geometry.Count;
var submeshInfos = new SubmeshInfo[numberOfSubmeshes];
for (int i = 0; i < numberOfSubmeshes; i++)
{
var geometry = mesh.Geometry[i];
// Build morph targets for current submesh.
List <DRMorphTargetContent> morphTargets = null;
if (hasMorphTargets)
{
morphTargets = BuildMorphTargets(geometry, inputMorphs, i);
if (morphTargets != null && morphTargets.Count > 0)
{
// When morph targets are used remove the "BINORMAL" channel. (Otherwise,
// the number of vertex attributes would exceed the limit. Binormals need
// to be reconstructed from normal and tangent in the vertex shader.)
string binormalName = VertexChannelNames.Binormal(0);
bool containsTangentFrames = geometry.Vertices.Channels.Remove(binormalName);
if (containsTangentFrames)
{
// A submesh cannot use vertex colors and tangents at the same time.
// This would also exceed the vertex attribute limit.
string colorName = VertexChannelNames.Color(0);
if (geometry.Vertices.Channels.Contains(colorName))
{
geometry.Vertices.Channels.Remove(colorName);
}
}
}
}
var submeshInfo = new SubmeshInfo
{
Geometry = geometry,
OriginalIndex = i,
VertexBuffer = geometry.Vertices.CreateVertexBuffer(),
MorphTargets = morphTargets
};
submeshInfo.VertexBufferIndex = GetVertexBufferIndex(submeshInfo.VertexBuffer.VertexDeclaration);
// Get material file or local material.
object material = (object)GetExternalMaterial(mesh, geometry) ?? geometry.Material;
if (material == null)
{
var message = string.Format(CultureInfo.InvariantCulture, "Mesh \"{0}\" does not have a material.", mesh);
throw new InvalidContentException(message, mesh.Identity);
}
int materialIndex;
if (!materialLookupTable.TryGetValue(material, out materialIndex))
{
materialIndex = materialLookupTable.Count;
materialLookupTable.Add(material, materialIndex);
}
submeshInfo.MaterialIndex = materialIndex;
submeshInfo.Material = material;
submeshInfos[i] = submeshInfo;
}
return(submeshInfos);
}
public void EndSubmesh()
{
if (currentSubmesh != null)
{
submeshes.Add(currentSubmesh);
currentSubmesh = null;
}
}
public void BeginSubmesh()
{
if(currentSubmesh == null)
currentSubmesh = new SubmeshInfo();
}
