fog

data/shaders/test.frag

@@ -164,14 +164,12 @@ main()
 
 
     if (cameraPosition.y > fogheight) {
-        dist = dist - entrydist;
+        dist -= entrydist;
     } else {
         // not intersect 
-        if (FragPos.y < fogheight) {
-            dist = (cameraPosition - FragPos);
-        } else {
+        if (FragPos.y > fogheight) {
         // intersect
-            dist =  cameraPosition - entrydist;
+            dist =  entrydist;
         }
         
     }