ray.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_RAY_H_
#define SRC_RAY_H_
 
#include <iostream>
 
#include "aabb.h"
#include "point3.h"
#include "vector3.h"
#include "mesh.h"
 
 
namespace mingfx {
 
    
class Ray {
public:
    
    Ray();
    
    Ray(const Point3 &origin, const Vector3 &direction);
    
    virtual ~Ray();
    
    bool operator==(const Ray& other) const;
    
    bool operator!=(const Ray& other) const;
    
    float Length() const;
    
    bool IntersectPlane(const Point3 &planePt, const Vector3 &planeNormal,
                        float *iTime, Point3 *iPoint) const;
    
    bool IntersectTriangle(const Point3 &v1, const Point3 &v2, const Point3 &v3,
                           float *iTime, Point3 *iPoint) const;
    
    bool IntersectQuad(const Point3 &v1, const Point3 &v2, const Point3 &v3, const Point3 &v4,
                       float *iTime, Point3 *iPoint) const;
 
    bool IntersectSphere(const Point3 &center, float radius,
                         float *iTime, Point3 *iPoint) const;
    
    bool IntersectMesh(const Mesh &mesh, float *iTime,
                       Point3 *iPoint, int *iTriangleID) const;
    
    bool FastIntersectMesh(Mesh *mesh, float *iTime,
                           Point3 *iPoint, int *iTriangleID) const;
    
     bool IntersectAABB(const AABB &box, float *iTime) const;
    
    Point3 origin() const;
    
    Vector3 direction() const;
 
    void set(Point3 newOrigin, Vector3 newDir);
    
private:
    Point3 p_;
    Vector3 d_;
};
 
 
// --- Stream operators ---
 
std::ostream & operator<< ( std::ostream &os, const Ray &r);
std::istream & operator>> ( std::istream &is, Ray &r);
 
    
} // end namespace
 
#endif