Added AR figure

Signed-off-by: Brandyn A. White <[email protected]>

Author: Brandyn A. White

Diff for: ar.rst

@@ -1,4 +1,41 @@
 Augmented Reality
 =================
 
+While Glass has a relatively small display and won't be able to create full immersive overlays, there are several interesting applications of AR that have been under-explored.  We have put together the building blocks to get you started, this will require understanding how they work to use them properly and this module is highly experimental.
 
+.. figure:: ardimensions.png
+   :alt: Glass Prism, Photo, Preview (640x360) relationships
+
+   This shows the relationship between the Prism, Photo, and Preview (640x360) images.
+
+displayWarpView([Array hBigToGlass]) : void
+  Warps each preview image to the display such that it overlaps with what the user sees (works for objects > 7ft away, currently supported resolutions are 640x360 and 1280x720).  If the hBigToGlass homography is not provided a default is used; however, it won't match perfectly, each Glass is slightly different and they only need to be calibrated once.
+
+warpPreviewSampleGlass([Function callback]) : void
+  Publishes the next preview image it gets, AR server uses it to match subsequent images to, a local copy is stored and can be drawn on using WS.warpDraw.
+
+  * Callback has parameters of the form function `callback(Homography array)`
+
+warpDraw(x, y, radius, r, g, b) : void
+  Draws a circle on the sample image
+
+
+.. code-block:: guess
+
+    function server() {
+	WS.cameraOn(1.2, 360, 640);
+	WS.displayWarpView();
+	function sample() {
+	    setTimeout(function (){
+		WS.warpDraw(640 / 2, 360 / 2, 10, 255, 0, 0);
+	    }, 1500)
+	    WS.warpPreviewSampleGlass('');
+	}
+	WS.dataLog(false, true, .15);
+	WS.gestureCallback('onGesture', function (gesture) {
+	    if (gesture === 'TAP') {
+		WS.sound('SUCCESS');
+		sample();
+	    }
+	});
+    }

Diff for: ardimensions.png

@@ -48,7 +48,7 @@ Example: Ping/Pong
 
     wearscript.parse(callback, argparse.ArgumentParser())
 
-.. code-block:: Go
+.. code-block:: guess
 
     // Go: Server
     package main