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
|
/**
** sipp - SImple Polygon Processor
**
** A general 3d graphic package
**
** Copyright Equivalent Software HB 1992
**
** 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 1, or 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 can receive a copy of the GNU General Public License from the
** Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**/
/**
** bozo.c - Bozo shader: color objects a la Bozo the clown.
**/
#include <math.h>
#include <stdio.h>
#include <sipp.h>
#include <noise.h>
#include <shaders.h>
extern bool noise_ready;
void
bozo_shader(pos, normal, texture, view_vec, lights, bd, color, opacity)
Vector *pos;
Vector *normal;
Vector *texture;
Vector *view_vec;
Lightsource *lights;
Bozo_desc *bd;
Color *color;
Color *opacity;
{
Vector tmp;
Surf_desc surface;
double noiseval;
int i;
if (!noise_ready) {
noise_init();
}
VecScalMul(tmp, bd->scale, *texture);
noiseval = noise(&tmp);
i = (noiseval + 1) * bd->no_of_cols / 2.0;
surface.color = bd->colors[i];
surface.ambient = bd->ambient;
surface.specular = bd->specular;
surface.c3 = bd->c3;
surface.opacity = bd->opacity;
basic_shader(pos, normal, texture, view_vec, lights, &surface,
color, opacity);
}
|
