add example code

examples/rayPickExample.js

@@ -0,0 +1,31 @@
+//
+//  rayPickExample.js
+//  hifi
+//
+//  Created by Brad Hefta-Gaub on 2/6/14.
+//  Copyright (c) 2014 HighFidelity, Inc. All rights reserved.
+//
+//  This is an example script that demonstrates use of the Camera class
+//
+//
+
+function mouseMoveEvent(event) {
+    print("mouseMoveEvent event.x,y=" + event.x + ", " + event.y);
+    var pickRay = Camera.computePickRay(event.x, event.y);
+    print("called Camera.computePickRay()");
+    print("computePickRay origin=" + pickRay.origin.x + ", " + pickRay.origin.y + ", " + pickRay.origin.z);
+    print("computePickRay direction=" + pickRay.direction.x + ", " + pickRay.direction.y + ", " + pickRay.direction.z);
+    var pickRay = Camera.computePickRay(event.x, event.y);
+    var intersection = Voxels.findRayIntersection(pickRay);
+    if (intersection.intersects) {
+        print("intersection voxel.red/green/blue=" + intersection.voxel.red + ", " 
+                    + intersection.voxel.green + ", " + intersection.voxel.blue);
+    }
+}
+
+Controller.mouseMoveEvent.connect(mouseMoveEvent);
+
+function scriptEnding() {
+}
+Script.scriptEnding.connect(scriptEnding);
+