glowing box for black color

examples/painting/whiteboard/blackInk.fs

@@ -0,0 +1,23 @@
+vec2 iResolution = iWorldScale.xy; 
+vec2 iMouse = vec2(0);
+
+const float PI = 3.14159265;
+
+float time = iGlobalTime;
+vec2 center = vec2(0.5, 0.5);
+void mainImage( out vec4 fragColor, in vec2 fragCoord ) {
+    vec2 position = (fragCoord.xy/iResolution.xy) + 0.5;
+    float dist = pow(distance(position.xy, center), 3.);
+    dist = dist / 1.0 + sin(time * 10)/100.0;
+    vec3 color = vec3(dist, 0.0, dist);
+    fragColor = vec4(color, 1.0);
+}
+
+vec4 getProceduralColor() {
+    vec4 result;
+    vec2 position = _position.xy;
+    
+    mainImage(result, position * iWorldScale.xy);
+ 
+    return result;
+}

examples/painting/whiteboard/whiteboardSpawner.js

@@ -81,7 +81,7 @@ var colorIndicatorBox = Entities.addEntity({
 Entities.editEntity(whiteboard, {
     userData: JSON.stringify({
         color: {
-            currentColor: colors[0],
+            currentColor: colors[0]
         },
         colorIndicator: colorIndicatorBox
     })
@@ -120,12 +120,14 @@ for (var i = 0; i < colors.length; i++) {
 
 // BLACK BOX
 var blackBoxDimensions = {
-    x: .2,
-    y: .2,
-    z: 0.05
+    x: 0.3,
+    y: 0.3,
+    z: 0.01
 };
+
 colorBoxPosition = Vec3.subtract(center, Vec3.multiply(direction, whiteboardDimensions.x / 2 + blackBoxDimensions.x / 2 - 0.01));
 colorBoxPosition.y += 0.3;
+var fragShaderURL = Script.resolvePath('blackInk.fs?v1' + Math.random());
 var blackBox = Entities.addEntity({
     type: 'Box',
     name: "Black Color",
@@ -139,7 +141,11 @@ var blackBox = Entities.addEntity({
     },
     script: scriptURL,
     userData: JSON.stringify({
-        whiteboard: whiteboard
+        whiteboard: whiteboard,
+        version: 2,
+        ProceduralEntity: {
+            shaderUrl: fragShaderURL
+        }
     })
 });
 
@@ -192,4 +198,4 @@ function cleanup() {
 
 
 // Uncomment this line to delete whiteboard and all associated entity on script close
-// Script.scriptEnding.connect(cleanup);
+Script.scriptEnding.connect(cleanup);