ray.hpp
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1 /*
2 ** TP CPE Lyon
3 ** Copyright (C) 2013 Damien Rohmer
4 **
5 ** This program is free software: you can redistribute it and/or modify
6 ** it under the terms of the GNU General Public License as published by
7 ** the Free Software Foundation, either version 3 of the License, or
8 ** (at your option) any later version.
9 **
10 ** This program is distributed in the hope that it will be useful,
11 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
12 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 ** GNU General Public License for more details.
14 **
15 ** You should have received a copy of the GNU General Public License
16 ** along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18 
19 
20 
21 
22 
23 #ifndef RAY_HPP
24 #define RAY_HPP
25 
26 #include <vec3.hpp>
27 
28 namespace cpe
29 {
30 
31 class camera;
32 
34 class ray
35 {
36  public:
37 
38  // ********************************************* //
39  // ********************************************* //
40  // CONSTRUCTOR
41  // ********************************************* //
42  // ********************************************* //
43 
45  ray(const vec3& x0=vec3(),const vec3& u=vec3());
46 
47 
48  // ********************************************* //
49  // ********************************************* //
50  // RAY EVALUATION
51  // ********************************************* //
52  // ********************************************* //
53 
55  vec3 operator()(float t) const;
56 
57  // ********************************************* //
58  // ********************************************* //
59  // HELPER RAY CONSTRUCTION
60  // ********************************************* //
61  // ********************************************* //
62 
63 
65  void offset(const double& epsilon=1e-3);
66 
67 
68 
73 };
74 
76 std::ostream& operator<<(std::ostream& stream,const ray& r);
77 
82 vec3 reflected_direction(const vec3& u,const vec3& n);
83 
84 }
85 
86 
87 
88 #endif