Implements #188 normal shading

components/renderers/cpp/include/ftl/cuda/normals.hpp

@@ -14,7 +14,7 @@ void normals(ftl::cuda::TextureObject<float4> &output,
 
 void normal_visualise(ftl::cuda::TextureObject<float4> &norm,
         ftl::cuda::TextureObject<float> &output,
-        const ftl::rgbd::Camera &camera, const float4x4 &pose,
+        const float3 &light,
         cudaStream_t stream);
 
 void normal_filter(ftl::cuda::TextureObject<float4> &norm,