Adding ViroKit. Needs AWSCore :(

mobile/ios/ViroKit.framework/Headers/VROARCamera.h

@@ -0,0 +1,78 @@
+//
+//  VROARCamera.h
+//  ViroKit
+//
+//  Created by Raj Advani on 6/6/17.
+//  Copyright © 2017 Viro Media. All rights reserved.
+//
+
+#ifndef VROARCamera_h
+#define VROARCamera_h
+
+#include <stdio.h>
+
+class VROViewport;
+class VROMatrix4f;
+class VROVector3f;
+class VROFieldOfView;
+
+enum class VROARTrackingState {
+    Unavailable,
+    Limited,
+    Normal,
+};
+
+/*
+ Provides reasons for why we are in Limited tracking state.
+ */
+enum class VROARTrackingStateReason {
+    None,
+    ExcessiveMotion,
+    InsufficientFeatures
+};
+
+/*
+ Contains information about the current camera position and imaging
+ characteristics. Updated periodically by the VROARSession.
+ */
+class VROARCamera {
+public:
+    
+    VROARCamera() {}
+    virtual ~VROARCamera() {}
+    
+    /*
+     Get the quality of the tracking. If we are in limited tracking state,
+     getLimitedTrackingStateReason() will return the reason for this state.
+     */
+    virtual VROARTrackingState getTrackingState() const = 0;
+    virtual VROARTrackingStateReason getLimitedTrackingStateReason() const = 0;
+    
+    /*
+     Get the position and rotation of the user in world space. These values
+     are derived from the AR camera's extrinsic matrix, acquired via visual and
+     inertial algorithms. They can be used to construct the view matrix for the
+     renderer.
+     */
+    virtual VROMatrix4f getRotation() const = 0;
+    virtual VROVector3f getPosition() const = 0;
+    
+    /*
+     Get the projection matrix needed to render a 3D scene to match the image
+     captured by this AR camera. The returned matrix is a concatenation of the
+     AR camera's intrinsic matrix (3D space --> 2D space) and the renderer's
+     orthographic projection matrix (2D space --> normalized device space).
+     This function should also output the field of view in the provided output
+     variable.
+     */
+    virtual VROMatrix4f getProjection(VROViewport viewport, float near, float far, VROFieldOfView *outFOV) const = 0;
+    
+    /*
+     Get the image size (width, height) for the camera. Stored in the
+     vector's x and y components.
+     */
+    virtual VROVector3f getImageSize() const = 0;
+    
+};
+
+#endif /* VROARCamera_h */