static List <ProBuilderMesh> CombineToNewMeshes(IEnumerable <ProBuilderMesh> meshes)
{
if (meshes == null)
{
throw new ArgumentNullException("meshes");
}
if (!meshes.Any() || meshes.Count() < 2)
{
return(null);
}
var vertices = new List <Vertex>();
var faces = new List <Face>();
var autoUvFaces = new List <Face>();
var sharedVertices = new List <SharedVertex>();
var sharedTextures = new List <SharedVertex>();
int offset = 0;
var materialMap = new List <Material>();
AccumulateMeshesInfo(
meshes,
offset,
ref vertices,
ref faces,
ref autoUvFaces,
ref sharedVertices,
ref sharedTextures,
ref materialMap
);
var res = SplitByMaxVertexCount(vertices, faces, sharedVertices, sharedTextures);
var pivot = meshes.LastOrDefault().transform.position;
foreach (var m in res)
{
m.renderer.sharedMaterials = materialMap.ToArray();
InternalMeshUtility.FilterUnusedSubmeshIndexes(m);
m.SetPivot(pivot);
UVEditing.SetAutoAndAlignUnwrapParamsToUVs(m, autoUvFaces);
}
return(res);
}
/// <summary>
/// Merge a collection of <see cref="ProBuilderMesh"/> objects to as few meshes as possible. This may result in
/// more than one mesh due to a max vertex count limit of 65535.
/// </summary>
/// <param name="meshes">A collection of meshes to be merged.</param>
/// <returns>
/// A list of merged meshes. In most cases this will be a single mesh. However it can be multiple in cases
/// where the resulting vertex count exceeds the maximum allowable value.
/// </returns>
public static List <ProBuilderMesh> Combine(IEnumerable <ProBuilderMesh> meshes)
{
if (meshes == null)
{
throw new ArgumentNullException("meshes");
}
if (!meshes.Any() || meshes.Count() < 2)
{
return(null);
}
var vertices = new List <Vertex>();
var faces = new List <Face>();
var autoUvFaces = new List <Face>();
var sharedVertices = new List <SharedVertex>();
var sharedTextures = new List <SharedVertex>();
int offset = 0;
var materialMap = new List <Material>();
foreach (var mesh in meshes)
{
var meshVertexCount = mesh.vertexCount;
var transform = mesh.transform;
var meshVertices = mesh.GetVertices();
var meshFaces = mesh.facesInternal;
var meshSharedVertices = mesh.sharedVertices;
var meshSharedTextures = mesh.sharedTextures;
var materials = mesh.renderer.sharedMaterials;
var materialCount = materials.Length;
for (int i = 0; i < meshVertexCount; i++)
{
vertices.Add(transform.TransformVertex(meshVertices[i]));
}
foreach (var face in meshFaces)
{
var newFace = new Face(face);
newFace.ShiftIndexes(offset);
// prevents uvs from shifting when being converted from local coords to world space
if (!newFace.manualUV && !newFace.uv.useWorldSpace)
{
newFace.manualUV = true;
autoUvFaces.Add(newFace);
}
var material = materials[Math.Clamp(face.submeshIndex, 0, materialCount - 1)];
var submeshIndex = materialMap.IndexOf(material);
if (submeshIndex > -1)
{
newFace.submeshIndex = submeshIndex;
}
else
{
if (material == null)
{
newFace.submeshIndex = 0;
}
else
{
newFace.submeshIndex = materialMap.Count;
materialMap.Add(material);
}
}
faces.Add(newFace);
}
foreach (var sv in meshSharedVertices)
{
var nsv = new SharedVertex(sv);
nsv.ShiftIndexes(offset);
sharedVertices.Add(nsv);
}
foreach (var st in meshSharedTextures)
{
var nst = new SharedVertex(st);
nst.ShiftIndexes(offset);
sharedTextures.Add(nst);
}
offset += meshVertexCount;
}
var res = SplitByMaxVertexCount(vertices, faces, sharedVertices, sharedTextures);
var pivot = meshes.LastOrDefault().transform.position;
foreach (var m in res)
{
m.renderer.sharedMaterials = materialMap.ToArray();
InternalMeshUtility.FilterUnusedSubmeshIndexes(m);
m.SetPivot(pivot);
UVEditing.SetAutoAndAlignUnwrapParamsToUVs(m, autoUvFaces);
}
return(res);
}