partition: Add templated overload for meshopt_partitionClusters

This is helpful when cluster indices are 16-bit (or have a signed type).

Author: zeux

src/meshoptimizer.h

@@ -738,6 +738,8 @@ inline size_t meshopt_buildMeshletsScan(meshopt_Meshlet* meshlets, unsigned int*
 template <typename T>
 inline meshopt_Bounds meshopt_computeClusterBounds(const T* indices, size_t index_count, const float* vertex_positions, size_t vertex_count, size_t vertex_positions_stride);
 template <typename T>
+inline size_t meshopt_partitionClusters(unsigned int* destination, const T* cluster_indices, size_t total_index_count, const unsigned int* cluster_index_counts, size_t cluster_count, size_t vertex_count, size_t target_partition_size);
+template <typename T>
 inline void meshopt_spatialSortTriangles(T* destination, const T* indices, size_t index_count, const float* vertex_positions, size_t vertex_count, size_t vertex_positions_stride);
 #endif
 
@@ -1124,6 +1126,14 @@ inline meshopt_Bounds meshopt_computeClusterBounds(const T* indices, size_t inde
 	return meshopt_computeClusterBounds(in.data, index_count, vertex_positions, vertex_count, vertex_positions_stride);
 }
 
+template <typename T>
+inline size_t meshopt_partitionClusters(unsigned int* destination, const T* cluster_indices, size_t total_index_count, const unsigned int* cluster_index_counts, size_t cluster_count, size_t vertex_count, size_t target_partition_size)
+{
+	meshopt_IndexAdapter<T> in(NULL, cluster_indices, total_index_count);
+
+	return meshopt_partitionClusters(destination, in.data, total_index_count, cluster_index_counts, cluster_count, vertex_count, target_partition_size);
+}
+
 template <typename T>
 inline void meshopt_spatialSortTriangles(T* destination, const T* indices, size_t index_count, const float* vertex_positions, size_t vertex_count, size_t vertex_positions_stride)
 {