Fixed ray picking in retina display mode

Core/Contents/Source/PolyGLRenderer.cpp

@@ -319,8 +319,8 @@ Vector3 OpenGLRenderer::projectRayFrom2DCoordinate(Number x, Number y, const Mat
 		_sceneProjectionMatrix[i] = projectionMatrix.ml[i];
 	}
 
-	gluUnProject(x, yRes - y, 0.0, mv, _sceneProjectionMatrix, vp, &nearPlane[0], &nearPlane[1], &nearPlane[2]);
-	gluUnProject(x, yRes - y, 1.0, mv, _sceneProjectionMatrix, vp, &farPlane[0], &farPlane[1], &farPlane[2]);
+	gluUnProject(x, (yRes*backingResolutionScaleY) - y, 0.0, mv, _sceneProjectionMatrix, vp, &nearPlane[0], &nearPlane[1], &nearPlane[2]);
+	gluUnProject(x, (yRes*backingResolutionScaleY) - y, 1.0, mv, _sceneProjectionMatrix, vp, &farPlane[0], &farPlane[1], &farPlane[2]);
 
 	Vector3 nearVec(nearPlane[0], nearPlane[1], nearPlane[2]);
 	Vector3 farVec(farPlane[0], farPlane[1], farPlane[2]);

Core/Contents/Source/PolyScene.cpp

@@ -270,7 +270,7 @@ Ray Scene::projectRayFromCameraAndViewportCoordinate(Camera *camera, Vector2 coo
 	Polycode::Rectangle viewport = camera->getViewport();
 	viewport.x = sceneMouseAdjust.x * renderer->getBackingResolutionScaleX();
 	viewport.y = sceneMouseAdjust.y * renderer->getBackingResolutionScaleY();
-    
+        
 	Vector3 dir =  renderer->projectRayFrom2DCoordinate(coordinate.x *  renderer->getBackingResolutionScaleX(), coordinate.y  * renderer->getBackingResolutionScaleY(), camera->getConcatenatedMatrix(), camera->getProjectionMatrix(), viewport);
 	Vector3 pos;