Adding ViroKit. Needs AWSCore :(

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

@@ -0,0 +1,96 @@
+//
+//  VROFrustum.h
+//  ViroRenderer
+//
+//  Created by Raj Advani on 10/15/15.
+//  Copyright © 2015 Viro Media. All rights reserved.
+//
+
+#ifndef VROFRUSTUM_H_
+#define VROFRUSTUM_H_
+
+#include "VROFrustumPlane.h"
+#include "VROVector3f.h"
+#include "VROFrustumBoxIntersectionMetadata.h"
+
+/*
+ Plane identifiers.
+ */
+enum class VROFrustumSide : int {
+    Left = 0,
+    Right = 1,
+    Bottom = 2,
+    Top = 3,
+    Near = 4,
+    Far = 5
+};
+
+/*
+ Enum for intersection testing results.
+ */
+enum class VROFrustumResult {
+    Inside,
+    Intersects,
+    Outside
+};
+
+class VROFrustum {
+public:
+
+    /*
+     Create a new frustum.
+     */
+    explicit VROFrustum();
+    virtual ~VROFrustum();
+
+    /*
+     Generic initialization.
+     */
+    void fitToModelView(const float *view, const float *projection,
+                        const float bufferSides, const float bufferNear, const float bufferFar);
+
+    /*
+     Intersection testing (automatically chooses best method).
+     */
+    VROFrustumResult intersect(const VROBoundingBox &box, VROFrustumBoxIntersectionMetadata *metadata) const;
+
+    /*
+     Intersect this frustum with a bounding box, utilizing the far points optimization and
+     temporal coherency optimizations.
+     */
+    VROFrustumResult intersectAllOpt(const VROBoundingBox &box, VROFrustumBoxIntersectionMetadata *metadata) const;
+
+    /*
+     Frustum intersection using the "far point" optimization. The far point optimization enables us
+     to determine if there's an intersection between a frustum and an AABB using only two plane->point
+     distance calculations per frustum plane.
+     */
+    VROFrustumResult intersectWithFarPointsOpt(const VROBoundingBox &box) const;
+
+    /*
+     Robust frustum intersection, using no optimizations.
+     */
+    VROFrustumResult intersectNoOpt(const VROBoundingBox &box) const;
+
+    /*
+     Check if the given point is contained by this frustum.
+     */
+    bool containsPoint(const VROVector3f &point) const;
+
+    /*
+     Get the distance of the given point from the near or far clipping plane of this
+     frustum.
+     */
+    float distanceFromFCP(VROVector3f pt) const;
+    float distanceFromNCP(VROVector3f pt) const;
+
+private:
+
+    /*
+     The planes composing this frustum: left, right, bottom, top, near, far.
+     */
+    VROFrustumPlane _planes[6];
+    
+};
+
+#endif /* VROFRUSTUM_H_ */