diff --git a/analysis/decl.cpp b/analysis/decl.cpp
index e817a877..db149b9d 100644
--- a/analysis/decl.cpp
+++ b/analysis/decl.cpp
@@ -383,33 +383,28 @@ double DECL::EdgeAngle(int edge)
 		double len = sqrt(nx*nx+ny*ny+nz*nz);
 		// new value for V is this normal vector
 		V.x = nx/len; V.y = ny/len; V.z = nz/len;
-		dotprod = U.x*V.x + U.y*V.y + U.z*V.z;
-		if (dotprod > 1.f) dotprod=1.f;
-		if (dotprod < 0.f) dotprod=-dotprod;
-		angle = acos(dotprod);
-		/*W = U - dotprod*V;
+		/* project onto plane of cube face also works
+		W = U - dotprod*V;
 		length = sqrt(W.x*W.x+W.y*W.y+W.z*W.z); // for normalization
 		dotprod = (U.x*W.x + U.y*W.y + U.z*W.z)/length;
 		if (dotprod > 1.f) dotprod=1.f;
 		if (dotprod < -1.f) dotprod=-1.f;
 		angle = acos(dotprod);
-		*/
+		 */
 	}
-	else{
-	  dotprod=U.x*V.x + U.y*V.y + U.z*V.z;
-		if (dotprod > 1.f) dotprod=1.f;
-		if (dotprod < -1.f) dotprod=-1.f;
-		angle = acos(dotprod);
-		// determine if angle is concave or convex based on edge normal
-		W = 0.5*(P+Q)-R; // vector that lies in plane of triangle
-		hypotenuse = sqrt(W.x*W.x+W.y*W.y+W.z*W.z + V.x*V.x+V.y*V.y+V.z*V.z); // hypotenuse of right triangle
-		length = sqrt((W.x+V.x)*(W.x+V.x) + (W.y+V.y)*(W.y+V.y) + (W.z+V.z)*(W.z+V.z));
-		if (length > hypotenuse){
-			// concave
-			angle = -angle;
-		}
-		angle *= 0.5; // half edge value
+	dotprod=U.x*V.x + U.y*V.y + U.z*V.z;
+	if (dotprod > 1.f) dotprod=1.f;
+	if (dotprod < -1.f) dotprod=-1.f;
+	angle = acos(dotprod);
+	// determine if angle is concave or convex based on edge normal
+	W = 0.5*(P+Q)-R; // vector that lies in plane of triangle
+	hypotenuse = sqrt(W.x*W.x+W.y*W.y+W.z*W.z + V.x*V.x+V.y*V.y+V.z*V.z); // hypotenuse of right triangle
+	length = sqrt((W.x+V.x)*(W.x+V.x) + (W.y+V.y)*(W.y+V.y) + (W.z+V.z)*(W.z+V.z));
+	if (length > hypotenuse){
+		// concave
+		angle = -angle;
 	}
+	angle *= 0.5; // half edge value
 	//printf("     %f, %f (Edge=%i, twin=%i)\n       U={%f, %f, %f}, V={%f, %f, %f}\n",angle,dotprod,edge,halfedge.twin(edge),U.x,U.y,U.z,V.x,V.y,V.z);
 	return angle;
 }