Examples: Make SSAOPass WebGL 2 compatible.

examples/js/postprocessing/SSAOPass.js

@@ -369,19 +369,26 @@ THREE.SSAOPass.prototype = Object.assign( Object.create( THREE.Pass.prototype ),
 		var simplex = new SimplexNoise();
 
 		var size = width * height;
-		var data = new Float32Array( size );
+		var data = new Float32Array( size * 4 );
 
 		for ( var i = 0; i < size; i ++ ) {
 
+			var stride = i * 4;
+
 			var x = ( Math.random() * 2 ) - 1;
 			var y = ( Math.random() * 2 ) - 1;
 			var z = 0;
 
-			data[ i ] = simplex.noise3d( x, y, z );
+			var noise = simplex.noise3d( x, y, z );
+
+			data[ stride ] = noise;
+			data[ stride + 1 ] = noise;
+			data[ stride + 2 ] = noise;
+			data[ stride + 3 ] = 1;
 
 		}
 
-		this.noiseTexture = new THREE.DataTexture( data, width, height, THREE.LuminanceFormat, THREE.FloatType );
+		this.noiseTexture = new THREE.DataTexture( data, width, height, THREE.RGBA, THREE.FloatType );
 		this.noiseTexture.wrapS = THREE.RepeatWrapping;
 		this.noiseTexture.wrapT = THREE.RepeatWrapping;
 		this.noiseTexture.needsUpdate = true;