Shader refactoring

src/utils/media-highlight-frag.glsl

@@ -6,20 +6,22 @@ if (hubs_HighlightInteractorOne || hubs_HighlightInteractorTwo) {
     float line = mod(hubs_Time / 3000.0 * size, size * 2.0) + hubs_SweepParams.s - size / 2.0;
 
     if (hubs_WorldPosition.y < line) {
-      // Highlight with an sweeping gradient
+      // Highlight with a sweeping gradient.
       ratio = max(0.0, 1.0 - (line - hubs_WorldPosition.y) / size * 3.0);
     }
   }
 
-  float pulse = sin(hubs_Time / 1000.0) + 1.0;
   // Highlight with a gradient falling off with distance.
+  float pulse = 9.0 + 3.0 * (sin(hubs_Time / 1000.0) + 1.0);
+
   if (hubs_HighlightInteractorOne) {
     float dist1 = distance(hubs_WorldPosition, hubs_InteractorOnePos);
-    ratio += -min(1.0, pow(dist1 * (9.0 + 3.0 * pulse), 3.0)) + 1.0;
+    ratio += -min(1.0, pow(dist1 * pulse, 3.0)) + 1.0;
   } 
+
   if (hubs_HighlightInteractorTwo) {
     float dist2 = distance(hubs_WorldPosition, hubs_InteractorTwoPos);
-    ratio += -min(1.0, pow(dist2 * (9.0 + 3.0 * pulse), 3.0)) + 1.0;
+    ratio += -min(1.0, pow(dist2 * pulse, 3.0)) + 1.0;
   }
 
   ratio = min(1.0, ratio);