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
|
#!/usr/local/bin/perl
#
# cube
#
# Draws a 3-D cube, viewed with perspective, stretched
# along the y-axis.
# Adapted from "cube.c", chapter 3, listing 3-1,
# page 70, OpenGL Programming Guide
#
BEGIN{ unshift(@INC,"../blib"); } # in case OpenGL is built but not installed
BEGIN{ unshift(@INC,"../blib/arch"); } # 5.002 gamma needs this
BEGIN{ unshift(@INC,"../blib/lib"); } # 5.002 gamma needs this
use OpenGL;
sub wirecube{
# adapted from libaux
local($s) = @_;
local(@x,@y,@z,@f);
local($i,$j,$k);
$s = $s/2.0;
@x=(-$s,-$s,-$s,-$s,$s,$s,$s,$s);
@y=(-$s,-$s,$s,$s,-$s,-$s,$s,$s);
@z=(-$s,$s,$s,-$s,-$s,$s,$s,-$s);
@f=(
0, 1, 2, 3,
3, 2, 6, 7,
7, 6, 5, 4,
4, 5, 1, 0,
5, 6, 2, 1,
7, 4, 0, 3,
);
for($i=0;$i<6;$i++){
glBegin(GL_LINE_LOOP);
for($j=0;$j<4;$j++){
$k=$f[$i*4+$j];
glVertex3d($x[$k],$y[$k],$z[$k]);
}
glEnd();
}
}
sub display{
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(1.0, 1.0, 1.0);
glLoadIdentity(); # clear the matrix
glTranslatef(0.0, 0.0, -5.0); # viewing transformation
glScalef(1.0, 2.0, 1.0); # modeling transformation
wirecube(1.0);
glpFlush();
}
sub myReshape {
# glViewport(0, 0, w, h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustum(-1.0, 1.0, -1.0, 1.0, 1.5, 20.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity ();
}
glpOpenWindow;
glShadeModel(GL_FLAT);
myReshape();
display();
glpMainLoop;
|
