解决painting.comp中uint/float在某些设备不能编译通过的问题

ArchitectureColoredPainting/Shaders/painting.comp

@@ -875,7 +875,7 @@ void main()
 			if (leftChild >= bvhLength)
 			{
 				uint zIndex = bvhChildren[index].y / 65535;
-				float angle = (bvhChildren[index].y / 65535.0 - zIndex) * 2 * PI;
+				float angle = (float(bvhChildren[index].y) / 65535.0 - zIndex) * 2 * PI;
 
 				mat2 rotation = {{cos(angle), -sin(angle)}, {sin(angle), cos(angle)}};
 				vec2 localUV = uv - (bound.xy + bound.zw) / 2;