Adding ViroKit. Needs AWSCore :(

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

@@ -0,0 +1,107 @@
+//
+//  VROFieldOfView.cpp
+//  ViroRenderer
+//
+//  Created by Raj Advani on 10/23/15.
+//  Copyright © 2015 Viro Media. All rights reserved.
+//
+
+#ifndef VROFieldOfView_h
+#define VROFieldOfView_h
+
+#include "VROMath.h"
+
+enum class VROFieldOfViewAxis {
+    X, Y
+};
+
+/*
+ Represents the field of view in each direction, in degrees.
+ */
+class VROFieldOfView {
+    
+public:
+    
+    VROFieldOfView() :
+        _left(s_defaultViewAngle),
+        _right(s_defaultViewAngle),
+        _bottom(s_defaultViewAngle),
+        _top(s_defaultViewAngle)
+    {}
+    
+    VROFieldOfView(float left, float right, float bottom, float top) :
+        _left(left),
+        _right(right),
+        _bottom(bottom),
+        _top(top)
+    {}
+    
+    VROFieldOfView(const VROFieldOfView *other) :
+        _left(other->_left),
+        _right(other->_right),
+        _bottom(other->_bottom),
+        _top(other->_top)
+    {}
+    
+    void setLeft(float left) {
+        _left = left;
+    }
+    float getLeft() const {
+        return _left;
+    }
+    
+    void setRight(float right) {
+        _right = right;
+    }
+    float getRight() const {
+        return _right;
+    }
+    
+    void setBottom(float bottom) {
+        _bottom = bottom;
+    }
+    float getBottom() const {
+        return _bottom;
+    }
+    
+    void setTop(float top) {
+        _top = top;
+    }
+    float getTop() const {
+        return _top;
+    }
+    
+    VROMatrix4f toPerspectiveProjection(float near, float far) {
+        float left   = -tanf(degrees_to_radians(_left))   * near;
+        float right  =  tanf(degrees_to_radians(_right))  * near;
+        float bottom = -tanf(degrees_to_radians(_bottom)) * near;
+        float top    =  tanf(degrees_to_radians(_top))    * near;
+        
+        return VROMathComputeFrustum(left, right, bottom, top, near, far);
+    }
+    
+    bool equals(const VROFieldOfView *other) const {
+        if (other == nullptr) {
+            return false;
+        }
+        else if (other == this) {
+            return true;
+        }
+        return (_left == other->_left) &&
+               (_right == other->_right) &&
+               (_bottom == other->_bottom) &&
+               (_top == other->_top);
+    }
+    
+private:
+    
+    constexpr static float s_defaultViewAngle = 40.0f;
+    
+    float _left;
+    float _right;
+    float _bottom;
+    float _top;
+    
+};
+
+#endif