Shared/LinesOfSight.cs

@@ -19,7 +19,7 @@ namespace SemiColinGames {
     // The number of total triangles drawn is one less than the number of edge points.
     readonly int[] indices = new int[(NUM_EDGE_VERTICES - 1) * 3];
 
-    Color color = Color.FromNonPremultiplied(new Vector4(1, 0, 0, 0.5f));
+    Color color = Color.FromNonPremultiplied(new Vector4(0, 0, 1, 0.6f));
 
     public LinesOfSight(GraphicsDevice graphics) {
       for (int i = 0; i < MAX_NPCS; i++) {
@@ -88,7 +88,9 @@ namespace SemiColinGames {
           }
         }
 
-        coneVertices[index][i + 1] = new VertexPositionColor(new Vector3(closestHit, 0), color);
+        float tint = 0.6f - hitTime / 2;
+        Color tinted = Color.FromNonPremultiplied(new Vector4(0, 0, 1, tint));
+        coneVertices[index][i + 1] = new VertexPositionColor(new Vector3(closestHit, 0), tinted);
       }
     }
 

Shared/Scene.cs

@@ -86,7 +86,9 @@ namespace SemiColinGames {
 
       // Draw lines of sight.
       basicEffect.Projection = camera.Projection;
+      if (Debug.Enabled) {
         world.LinesOfSight.Draw(graphics, basicEffect);
+      }
 
       // Set up transformation matrix for drawing world objects.
       Matrix transform = Matrix.CreateTranslation(-camera.Left, -camera.Top, 0);