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
|
/**
** 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.
**/
/**
** mask.c - Mask shader: use a masking function to select between
** two shaders.
**/
#include <sipp.h>
#include <shaders.h>
void
mask_shader(pos, normal, texture, view_vec, lights, md, color, opacity)
Vector *pos;
Vector *normal;
Vector *texture;
Vector *view_vec;
Lightsource *lights;
Mask_desc *md;
Color *color;
Color *opacity;
{
if (md->masker(md->mask_data, texture)) {
md->t_shader(pos, normal, texture, view_vec, lights, md->t_surface,
color, opacity);
} else {
md->f_shader(pos, normal, texture, view_vec, lights, md->f_surface,
color, opacity);
}
}
|
