Fixed broken custom attributes demo.

Attributes were not in fact updated before.

examples/webgl_custom_attributes.html

@@ -88,6 +88,8 @@
 
 		var sphere, uniforms, attributes;
 
+		var noise = [];
+
 		var WIDTH = window.innerWidth,
 			HEIGHT = window.innerHeight;
 
@@ -136,9 +138,11 @@
 			var vertices = sphere.geometry.vertices;
 			var values = attributes.displacement.value;
 
+
 			for( var v = 0; v < vertices.length; v++ ) {
 
-				values[ v ] = Math.random() * 5;
+				values[ v ] = 0;
+				noise[ v ] = Math.random() * 5;
 
 			}
 
@@ -157,6 +161,11 @@
 
 		}
 
+		function cap( x, a, b ) {
+
+			return ( x < a ) ? a : ( ( x > b ) ? b : x );
+		}
+
 		var i, value;
 
 		function animate() {
@@ -170,18 +179,21 @@
 
 		function render() {
 
-			sphere.rotation.y += 0.01;
-			sphere.rotation.z += 0.01;
+			var time = new Date().getTime() * 0.01;
+
+			sphere.rotation.y = 0.01 * time;
+			sphere.rotation.z = 0.01 * time;
 
 			uniforms.amplitude.value = 2.5 * Math.sin( sphere.rotation.y * 0.125 );
 			THREE.ColorUtils.adjustHSV( uniforms.color.value, 0.0005, 0, 0 );
 
 			for( i = 0; i < attributes.displacement.value.length; i++ ) {
 
-				value = attributes.displacement.value[ i ];
-				value[ i ] += 0.5 * ( 0.5 - Math.random() );
-				if ( value[ i ] < -5 ) value[ i ] = -5;
-				if ( value[ i ] > 5 ) value[ i ] = 5;
+				attributes.displacement.value[ i ] = Math.sin( 0.1*i + time );
+
+				noise[ i ] += 0.5 * ( 0.5 - Math.random() );
+				noise[ i ] = cap( noise[ i ], -5, 5 );
+				attributes.displacement.value[ i ] += noise[ i ];
 
 			}
 			attributes.displacement.needsUpdate = true;