public static void CombineChildMeshes(this GameObject gameObject)
{
MeshFilter[] meshFilters = gameObject.GetComponentsInChildren <MeshFilter>();
List <MeshList> meshLists = new List <MeshList>();
//List<Material> materials = new List<Material>();
Matrix4x4 goMatrix = gameObject.transform.worldToLocalMatrix;
for (int i = 0; i < meshFilters.Length; i++)
{
var mr = meshFilters[i].GetComponent <MeshRenderer>();
MeshList ml;
int vertexCount = meshFilters[i].sharedMesh.vertexCount;
bool done = false;
for (int mlindex = 0; mlindex < meshLists.Count; mlindex++)
{
if (meshLists[mlindex].material == mr.sharedMaterial &&
meshLists[mlindex].totalVertices + vertexCount < MAX_INDICES)
{
meshLists[mlindex].AddInstance(meshFilters[i], goMatrix);
Object.Destroy(mr);
Object.Destroy(meshFilters[i]);
done = true;
break;
}
}
if (done)
{
continue;
}
ml = new MeshList();
ml.material = mr.sharedMaterial;
ml.AddInstance(meshFilters[i], goMatrix);
meshLists.Add(ml);
//meshFilters[i].gameObject.SetActive(false);
Object.Destroy(mr);
Object.Destroy(meshFilters[i]);
}
// combine meshes
for (int i = 0; i < meshLists.Count; i++)
{
var go = gameObject.CreateChild();
MeshFilter mf = go.AddComponent <MeshFilter>();
MeshRenderer mr = go.AddComponent <MeshRenderer>();
Mesh m = new Mesh();
m.CombineMeshes(meshLists[i].instances.ToArray());
mf.sharedMesh = m;
mr.sharedMaterial = meshLists[i].material;
}
}
