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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/*
* Example of how one might use GLUT with the 3Dfx driver in full-screen mode.
* Note: this only works with X since we're using Mesa's GLX "hack" for
* using Glide.
*
* Goals:
* easy setup and input event handling with GLUT
* use 3Dfx hardware
* automatically set MESA environment variables
* don't lose mouse input focus
*
* Brian Paul This file is in the public domain.
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <GL/glut.h>
#define WIDTH 640
#define HEIGHT 480
static int Window = 0;
static int ScreenWidth, ScreenHeight;
static GLuint Torus = 0;
static GLfloat Xrot = 0.0, Yrot = 0.0;
static void Display( void )
{
static GLfloat blue[4] = {0.2, 0.2, 1.0, 1.0};
static GLfloat red[4] = {1.0, 0.2, 0.2, 1.0};
static GLfloat green[4] = {0.2, 1.0, 0.2, 1.0};
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glPushMatrix();
glRotatef(Xrot, 1, 0, 0);
glRotatef(Yrot, 0, 1, 0);
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue);
glCallList(Torus);
glRotatef(90.0, 1, 0, 0);
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red);
glCallList(Torus);
glRotatef(90.0, 0, 1, 0);
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, green);
glCallList(Torus);
glPopMatrix();
glutSwapBuffers();
}
static void Reshape( int width, int height )
{
float ratio = (float) width / (float) height;
ScreenWidth = width;
ScreenHeight = height;
/*
* The 3Dfx driver is limited to 640 x 480 but the X window may be larger.
* Enforce that here.
*/
if (width > WIDTH)
width = WIDTH;
if (height > HEIGHT)
height = HEIGHT;
glViewport( 0, 0, width, height );
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
glFrustum( -ratio, ratio, -1.0, 1.0, 5.0, 30.0 );
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
glTranslatef( 0.0, 0.0, -20.0 );
}
static void Key( unsigned char key, int x, int y )
{
(void) x;
(void) y;
switch (key) {
case 27:
glutDestroyWindow(Window);
exit(0);
break;
}
glutPostRedisplay();
}
static void SpecialKey( int key, int x, int y )
{
(void) x;
(void) y;
switch (key) {
case GLUT_KEY_UP:
break;
case GLUT_KEY_DOWN:
break;
case GLUT_KEY_LEFT:
break;
case GLUT_KEY_RIGHT:
break;
}
glutPostRedisplay();
}
static void MouseMove( int x, int y )
{
Xrot = y - ScreenWidth / 2;
Yrot = x - ScreenHeight / 2;
glutPostRedisplay();
}
static void Init( void )
{
Torus = glGenLists(1);
glNewList(Torus, GL_COMPILE);
glutSolidTorus(0.5, 2.0, 10, 20);
glEndList();
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
}
int main( int argc, char *argv[] )
{
#ifndef _WIN32
printf("NOTE: if you've got 3Dfx VooDoo hardware you must run this");
printf(" program as root.\n\n");
printf("Move the mouse. Press ESC to exit.\n\n");
#endif
/* Tell Mesa GLX to use 3Dfx driver in fullscreen mode. */
putenv("MESA_GLX_FX=fullscreen");
/* Disable 3Dfx Glide splash screen */
putenv("FX_GLIDE_NO_SPLASH=");
/* Give an initial size and position so user doesn't have to place window */
glutInitWindowPosition(0, 0);
glutInitWindowSize(WIDTH, HEIGHT);
glutInit( &argc, argv );
glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
Window = glutCreateWindow(argv[0]);
if (!Window) {
printf("Error, couldn't open window\n");
exit(1);
}
/*
* Want the X window to fill the screen so that we don't have to
* worry about losing the mouse input focus.
* Note that we won't actually see the X window since we never draw
* to it, hence, the original X screen's contents aren't disturbed.
*/
glutFullScreen();
Init();
glutReshapeFunc( Reshape );
glutKeyboardFunc( Key );
glutSpecialFunc( SpecialKey );
glutDisplayFunc( Display );
glutPassiveMotionFunc( MouseMove );
glutMainLoop();
return 0;
}
|
