private void MergeChunkMeshes()
{
MeshProcessor processor = this.meshProcessor;
TileSystem system = this.tileSystem;
Matrix4x4 correctionMatrix = system.transform.worldToLocalMatrix;
this.combineChunkMeshes = new MeshData[this.combineChunkRows, this.combineChunkColumns];
for (int chunkRow = 0; chunkRow < this.combineChunkRows; ++chunkRow)
{
for (int chunkColumn = 0; chunkColumn < this.combineChunkColumns; ++chunkColumn)
{
MeshData chunkMesh = null;
int startRow = chunkRow * this.combineChunkHeight;
int startColumn = chunkColumn * this.combineChunkWidth;
int endRow = Mathf.Min(system.RowCount, startRow + this.combineChunkHeight);
int endColumn = Mathf.Min(system.ColumnCount, startColumn + this.combineChunkWidth);
for (int row = startRow; row < endRow; ++row)
{
for (int column = startColumn; column < endColumn; ++column)
{
MeshData tileMesh = this.map[row, column];
if (tileMesh == null)
{
continue;
}
if (chunkMesh == null)
{
chunkMesh = tileMesh;
processor.Mount(chunkMesh);
}
else
{
processor.AppendMesh(tileMesh);
}
}
}
if (chunkMesh != null)
{
processor.Apply();
this.combineChunkMeshes[chunkRow, chunkColumn] = chunkMesh;
chunkMesh.ApplyTransform(correctionMatrix);
if (chunkMesh.HasTangents)
{
chunkMesh.CalculateTangents();
}
}
this.ReportProgress();
}
}
this.map = null;
}
/// <summary>
/// Convert mesh data into meshes on a per material basis.
/// </summary>
/// <param name="processor">Reuse an existing mesh processor, or alternatively
/// specify <c>null</c> to create a new one.</param>
/// <returns>
/// Array of <c>Mesh</c> objects.
/// </returns>
public Mesh[] ToMeshPerMaterial(MeshProcessor processor)
{
if (processor == null)
{
processor = new MeshProcessor();
}
Mesh[] meshes = new Mesh[this.Submeshes.Count];
int meshIndex = 0;
// Array of vertex indices which is used to extract vertices
// into separate mesh objects.
int[] vertexMap = new int[this.Vertices.Length];
int vertexMapIndex = 0;
foreach (var material in this.Submeshes.Keys)
{
int[] triangles = this.Submeshes[material].ToArray();
// Clear previously extracted vertices.
processor.Reset();
for (int i = 0; i < vertexMap.Length; ++i)
{
vertexMap[i] = -1;
}
vertexMapIndex = 0;
// Extract unique vertices from mesh.
for (int ti = 0; ti < triangles.Length; ++ti)
{
int vi = triangles[ti];
// Has this vertex already been extracted?
if (vertexMap[vi] == -1)
{
vertexMap[vi] = vertexMapIndex++;
processor.Vertices.Add(this.Vertices[vi]);
if (this.HasNormals)
{
processor.Normals.Add(this.Normals[vi]);
}
if (this.HasUV)
{
processor.Uv.Add(this.Uv[vi]);
}
if (this.HasUV2)
{
processor.Uv2.Add(this.Uv2[vi]);
}
if (this.HasColors32)
{
processor.Colors32.Add(this.Colors32[vi]);
}
if (this.HasTangents)
{
processor.Tangents.Add(this.Tangents[vi]);
}
}
// Triangle index must be remapped.
triangles[ti] = vertexMap[vi];
}
// Form mesh from extracted vertex data.
var mesh = new Mesh();
meshes[meshIndex++] = mesh;
mesh.vertices = processor.Vertices.ToArray();
if (this.HasNormals)
{
mesh.normals = processor.Normals.ToArray();
}
if (this.HasUV)
{
mesh.uv = processor.Uv.ToArray();
}
if (this.HasUV2)
{
mesh.uv2 = processor.Uv2.ToArray();
}
if (this.HasColors32)
{
mesh.colors32 = processor.Colors32.ToArray();
}
if (this.HasTangents)
{
mesh.tangents = processor.Tangents.ToArray();
}
mesh.triangles = triangles;
mesh.RecalculateBounds();
}
return(meshes);
}