-
Notifications
You must be signed in to change notification settings - Fork 0
/
cube.c
147 lines (119 loc) · 3.86 KB
/
cube.c
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
/* ============================================================================
**
** Demonstration of spinning cube
** Copyright (C) 2005 Julien Guertault
**
** This program is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License
** as published by the Free Software Foundation; either version 2
** of the License, or (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
**
** ========================================================================= */
#include <stdlib.h>
#include <math.h>
#ifdef __APPLE__
#include <GLUT/glut.h>
#else
#include <GL/glut.h>
#endif
/*
** Function called to update rendering
*/
void DisplayFunc(void)
{
static float alpha = 0;
/* Clear the buffer, clear the matrix */
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
/* A step backward, then spin the cube */
glTranslatef(0, 0, -10);
glRotatef(30, 1, 0, 0);
glRotatef(alpha, 0, 1, 0);
/* We tell we want to draw quads */
glBegin(GL_QUADS);
/* Every four calls to glVertex, a quad is drawn */
glColor3f(0, 0, 0); glVertex3f(-1, -1, -1);
glColor3f(0, 0, 1); glVertex3f(-1, -1, 1);
glColor3f(0, 1, 1); glVertex3f(-1, 1, 1);
glColor3f(0, 1, 0); glVertex3f(-1, 1, -1);
glColor3f(1, 0, 0); glVertex3f( 1, -1, -1);
glColor3f(1, 0, 1); glVertex3f( 1, -1, 1);
glColor3f(1, 1, 1); glVertex3f( 1, 1, 1);
glColor3f(1, 1, 0); glVertex3f( 1, 1, -1);
glColor3f(0, 0, 0); glVertex3f(-1, -1, -1);
glColor3f(0, 0, 1); glVertex3f(-1, -1, 1);
glColor3f(1, 0, 1); glVertex3f( 1, -1, 1);
glColor3f(1, 0, 0); glVertex3f( 1, -1, -1);
glColor3f(0, 1, 0); glVertex3f(-1, 1, -1);
glColor3f(0, 1, 1); glVertex3f(-1, 1, 1);
glColor3f(1, 1, 1); glVertex3f( 1, 1, 1);
glColor3f(1, 1, 0); glVertex3f( 1, 1, -1);
glColor3f(0, 0, 0); glVertex3f(-1, -1, -1);
glColor3f(0, 1, 0); glVertex3f(-1, 1, -1);
glColor3f(1, 1, 0); glVertex3f( 1, 1, -1);
glColor3f(1, 0, 0); glVertex3f( 1, -1, -1);
glColor3f(0, 0, 1); glVertex3f(-1, -1, 1);
glColor3f(0, 1, 1); glVertex3f(-1, 1, 1);
glColor3f(1, 1, 1); glVertex3f( 1, 1, 1);
glColor3f(1, 0, 1); glVertex3f( 1, -1, 1);
/* No more quads */
glEnd();
/* Rotate a bit more */
alpha = alpha + 0.1;
/* End */
glFlush();
glutSwapBuffers();
/* Update again and again */
glutPostRedisplay();
}
/*
** Function called when the window is created or resized
*/
void ReshapeFunc(int width, int height)
{
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(20, width / (float) height, 5, 15);
glViewport(0, 0, width, height);
glMatrixMode(GL_MODELVIEW);
glutPostRedisplay();
}
/*
** Function called when a key is hit
*/
void KeyboardFunc(unsigned char key, int x, int y)
{
int foo;
foo = x + y; /* Has no effect: just to avoid a warning */
if ('q' == key || 'Q' == key || 27 == key)
exit(0);
}
int main(int argc, char **argv)
{
/* Creation of the window */
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
glutInitWindowSize(500, 500);
glutCreateWindow("Spinning cube");
/* OpenGL settings */
glClearColor(0, 0, 0, 0);
glEnable(GL_DEPTH_TEST);
/* Declaration of the callbacks */
glutDisplayFunc(&DisplayFunc);
glutReshapeFunc(&ReshapeFunc);
glutKeyboardFunc(&KeyboardFunc);
/* Loop */
glutMainLoop();
/* Never reached */
return 0;
}
/* ========================================================================= */