gfxmath.h

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/*
 This file is part of the MinGfx Project.
 
 Copyright (c) 2017,2018 Regents of the University of Minnesota.
 All Rights Reserved.
 
 Original Author(s) of this File:
    Dan Keefe, 2018, University of Minnesota
    
 Author(s) of Significant Updates/Modifications to the File:
    ...
 */
 
#ifndef SRC_GFXMATH_H_
#define SRC_GFXMATH_H_
 
#include "point2.h"
#include "point3.h"
#include "vector3.h"
#include "matrix4.h"
 
namespace mingfx {
 
 
class GfxMath {
public:
 
    static float Clamp(float x, float a, float b);
        
    static float ToRadians(float degrees);
        
    static float ToDegrees(float radians);
    
    static Vector3 ToRadians(Vector3 degrees);
    
    static Vector3 ToDegrees(Vector3 radians);
    
    static float Lerp(float a, float b, float alpha);
 
    static int iLerp(int a, int b, float alpha);
 
    static Point3 ScreenToNearPlane(const Matrix4 &viewMatrix, const Matrix4 &projMatrix, const Point2 &normalizedScreenPt);
 
    static Point3 ScreenToDepthPlane(const Matrix4 &viewMatrix, const Matrix4 &projMatrix, const Point2 &normalizedScreenPt, float planeDepth);
 
    static Point3 ScreenToWorld(const Matrix4 &viewMatrix, const Matrix4 &projMatrix, const Point2 &normalizedScreenPt, float normalizedZ);
 
 
    static const float PI;
    static const float TWO_PI;
    static const float HALF_PI;
};
 
 
    
} // end namespace
 
#endif