1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/*****
* glrender.h
* Render 3D Bezier paths and surfaces.
*****/
#ifndef GLRENDER_H
#define GLRENDER_H
#include "common.h"
#include "triple.h"
#ifdef HAVE_GL
#include <csignal>
#define GLEW_NO_GLU
//#define GLEW_OSMESA
#ifdef __MSDOS__
#define GLEW_STATIC
#include <windows.h>
#define CALLBACK __stdcall
typedef void (APIENTRY* _GLUfuncptr)();
#endif
#ifdef __APPLE__
#include <OpenGL/glew.h>
#include <OpenGL/gl.h>
#ifdef HAVE_LIBGLUT
#include <GLUT/glut.h>
#endif
#ifdef HAVE_LIBOSMESA
#include <OpenGL/osmesa.h>
#endif
#else
#include <GL/glew.h>
#ifdef __MSDOS__
#include <GL/wglew.h>
#include <GL/wglext.h>
#endif
#ifdef HAVE_LIBGLUT
#ifdef __MSDOS__
#define FREEGLUT_STATIC
#define APIENTRY
#endif
#include <GL/glut.h>
#endif
#ifdef HAVE_LIBOSMESA
#include <GL/osmesa.h>
#endif
#endif
namespace camp {
class picture;
inline void store(GLfloat *f, double *C)
{
f[0]=C[0];
f[1]=C[1];
f[2]=C[2];
}
inline void store(GLfloat *control, const camp::triple& v)
{
control[0]=v.getx();
control[1]=v.gety();
control[2]=v.getz();
}
inline void store(GLfloat *control, const triple& v, double weight)
{
control[0]=v.getx()*weight;
control[1]=v.gety()*weight;
control[2]=v.getz()*weight;
control[3]=weight;
}
}
namespace gl {
extern bool outlinemode;
extern Int maxvertices;
struct projection
{
public:
bool orthographic;
camp::triple camera;
camp::triple up;
camp::triple target;
double zoom;
double angle;
camp::pair viewportshift;
projection(bool orthographic=false, camp::triple camera=0.0,
camp::triple up=0.0, camp::triple target=0.0,
double zoom=0.0, double angle=0.0,
camp::pair viewportshift=0.0) :
orthographic(orthographic), camera(camera), up(up), target(target),
zoom(zoom), angle(angle), viewportshift(viewportshift) {}
};
projection camera(bool user=true);
void glrender(const string& prefix, const camp::picture* pic,
const string& format, double width, double height, double angle,
double zoom, const camp::triple& m, const camp::triple& M,
const camp::pair& shift, double *t, double *background,
size_t nlights, camp::triple *lights, double *diffuse,
double *ambient, double *specular, bool view, int oldpid=0);
struct ModelView {
double T[16];
double Tinv[16];
};
extern ModelView modelView;
void initshader();
void deleteshader();
}
namespace camp {
struct billboard
{
double cx,cy,cz;
triple u,v,w;
void init(const triple& center) {
cx=center.getx();
cy=center.gety();
cz=center.getz();
gl::projection P=gl::camera(false);
w=unit(P.camera-P.target);
v=unit(perp(P.up,w));
u=cross(v,w);
}
triple transform(const triple& V) {
double x=V.getx()-cx;
double y=V.gety()-cy;
double z=V.getz()-cz;
return triple(cx+u.getx()*x+v.getx()*y+w.getx()*z,
cy+u.gety()*x+v.gety()*y+w.gety()*z,
cz+u.getz()*x+v.getz()*y+w.getz()*z);
}
void store(GLfloat* C, const triple& V) {
double x=V.getx()-cx;
double y=V.gety()-cy;
double z=V.getz()-cz;
C[0]=cx+u.getx()*x+v.getx()*y+w.getx()*z;
C[1]=cy+u.gety()*x+v.gety()*y+w.gety()*z;
C[2]=cz+u.getz()*x+v.getz()*y+w.getz()*z;
}
};
extern billboard BB;
}
#else
typedef float GLfloat;
#endif
#endif
|
