Use edge sharpness in buffer

QTProject/subdivision-edge.compute

@@ -40,6 +40,12 @@ void main(){
 
     vec3 pos;
 
+    if (s > 0){
+        edges[output_offset + gl_GlobalInvocationID.x].pos = 0.5f*a.pos + 0.5f*b.pos;
+        edges[output_offset + gl_GlobalInvocationID.x].norm = normalize(0.5f*a.norm + 0.5f*b.norm);
+    }
+    else {
         edges[output_offset + gl_GlobalInvocationID.x].pos = 3.0f/8.0f * a.pos + 3.0f/8.0f * b.pos + 1.0f/8.0f * c.pos + 1.0f/8.0f * d.pos;
         edges[output_offset + gl_GlobalInvocationID.x].norm = normalize(3.0f/8.0f * a.norm + 3.0f/8.0f * b.norm + 1.0f/8.0f * c.norm + 1.0f/8.0f * d.norm);
+    }
 }