Add full 3D MLS and carving

A new fusion operator that uses actual MLS of all sources combined with a visibility carving step. Next task is to construct a 4D scene model and fusion with that also.

components/operators/include/ftl/operators/cuda/smoothing_cuda.hpp

@@ -17,6 +17,15 @@ void mls_smooth(
 		const ftl::rgbd::Camera &camera,
 		cudaStream_t stream);
 
+void mls_smooth(
+		ftl::cuda::TextureObject<half4> &normals_in,
+		ftl::cuda::TextureObject<half4> &normals_out,
+		ftl::cuda::TextureObject<float> &depth_in,
+		float smoothing,
+		int radius,
+		const ftl::rgbd::Camera &camera,
+		cudaStream_t stream);
+
 void colour_mls_smooth(
 		ftl::cuda::TextureObject<half4> &normals_in,
 		ftl::cuda::TextureObject<half4> &normals_out,