Dont use MINF in normals

components/renderers/cpp/src/normals.cu

@@ -10,7 +10,7 @@ __global__ void computeNormals_kernel(ftl::cuda::TextureObject<float4> output,
 
 	if(x >= input.width() || y >= input.height()) return;
 
-	output(x,y) = make_float4(MINF, MINF, MINF, MINF);
+	output(x,y) = make_float4(0, 0, 0, 0);
 
 	if(x > 0 && x < input.width()-1 && y > 0 && y < input.height()-1) {
 		const float3 CC = make_float3(input.tex2D((int)x+0, (int)y+0)); //[(y+0)*width+(x+0)];
@@ -19,14 +19,14 @@ __global__ void computeNormals_kernel(ftl::cuda::TextureObject<float4> output,
 		const float3 MC = make_float3(input.tex2D((int)x+0, (int)y-1)); //[(y-1)*width+(x+0)];
 		const float3 CM = make_float3(input.tex2D((int)x-1, (int)y+0)); //[(y+0)*width+(x-1)];
 
-		if(CC.x != MINF && PC.x != MINF && CP.x != MINF && MC.x != MINF && CM.x != MINF) {
+		//if(CC.x != MINF && PC.x != MINF && CP.x != MINF && MC.x != MINF && CM.x != MINF) {
 			const float3 n = cross(PC-MC, CP-CM);
 			const float  l = length(n);
 
 			if(l > 0.0f) {
 				output(x,y) = make_float4(n/-l, 1.0f);
 			}
-		}
+		//}
 	}
 }
 
@@ -58,8 +58,9 @@ __global__ void vis_normals_kernel(ftl::cuda::TextureObject<float4> norm,
     float3 ray = make_float3(0.0f, 0.0f, 1.0f); //pose * camera.screenToCam(x,y,1.0f);
     ray = ray / length(ray);
     float3 n = make_float3(norm.tex2D((int)x,(int)y));
-    if (n.x == MINF) return;
-    n /= length(n);
+    float l = length(n);
+    if (l == 0) return;
+    n /= l;
 
     output(x,y) = fabs(dot(ray, n))*7.0f;
 }