goat3d
view libs/vmath/ray_c.c @ 40:a5c5cec3cb88
- added mesh attribute and face append functions
- added Int4 constructor
- continued the blender exporter
- fixed a bug in clean_filename which made it produce unterminated strings
- renamed clean_filename to goat3d_clean_filename and made it extern
- added call to goat3d_clean_filename in the mesh XML export code to cleanup ctm filenames
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Sun, 13 Oct 2013 10:14:19 +0300 |
| parents | |
| children |
line source
1 /*
2 libvmath - a vector math library
3 Copyright (C) 2004-2011 John Tsiombikas <nuclear@member.fsf.org>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published
7 by the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
19 #include "ray.h"
20 #include "vector.h"
22 ray_t ray_transform(ray_t r, mat4_t xform)
23 {
24 mat4_t upper;
25 vec3_t dir;
27 m4_copy(upper, xform);
28 upper[0][3] = upper[1][3] = upper[2][3] = upper[3][0] = upper[3][1] = upper[3][2] = 0.0;
29 upper[3][3] = 1.0;
31 dir = v3_sub(r.dir, r.origin);
32 dir = v3_transform(dir, upper);
33 r.origin = v3_transform(r.origin, xform);
34 r.dir = v3_add(dir, r.origin);
35 return r;
36 }