| rev |
line source |
|
nuclear@2
|
1 /*
|
|
nuclear@2
|
2 libvmath - a vector math library
|
|
nuclear@2
|
3 Copyright (C) 2004-2011 John Tsiombikas <nuclear@member.fsf.org>
|
|
nuclear@2
|
4
|
|
nuclear@2
|
5 This program is free software: you can redistribute it and/or modify
|
|
nuclear@2
|
6 it under the terms of the GNU Lesser General Public License as published
|
|
nuclear@2
|
7 by the Free Software Foundation, either version 3 of the License, or
|
|
nuclear@2
|
8 (at your option) any later version.
|
|
nuclear@2
|
9
|
|
nuclear@2
|
10 This program is distributed in the hope that it will be useful,
|
|
nuclear@2
|
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
nuclear@2
|
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
nuclear@2
|
13 GNU Lesser General Public License for more details.
|
|
nuclear@2
|
14
|
|
nuclear@2
|
15 You should have received a copy of the GNU Lesser General Public License
|
|
nuclear@2
|
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
nuclear@2
|
17 */
|
|
nuclear@2
|
18
|
|
nuclear@2
|
19 #include "basis.h"
|
|
nuclear@2
|
20 #include "matrix.h"
|
|
nuclear@2
|
21
|
|
nuclear@2
|
22 void basis_matrix(mat4_t res, vec3_t i, vec3_t j, vec3_t k)
|
|
nuclear@2
|
23 {
|
|
nuclear@2
|
24 m4_identity(res);
|
|
nuclear@2
|
25 m4_set_column(res, v4_cons(i.x, i.y, i.z, 1.0), 0);
|
|
nuclear@2
|
26 m4_set_column(res, v4_cons(j.x, j.y, j.z, 1.0), 1);
|
|
nuclear@2
|
27 m4_set_column(res, v4_cons(k.x, k.y, k.z, 1.0), 2);
|
|
nuclear@2
|
28 }
|
|
nuclear@2
|
29
|
|
nuclear@2
|
30 void basis_matrix_dir(mat4_t res, vec3_t dir)
|
|
nuclear@2
|
31 {
|
|
nuclear@2
|
32 vec3_t k = v3_normalize(dir);
|
|
nuclear@2
|
33 vec3_t j = {0, 1, 0};
|
|
nuclear@2
|
34 vec3_t i = v3_cross(j, k);
|
|
nuclear@2
|
35 j = v3_cross(k, i);
|
|
nuclear@2
|
36 basis_matrix(res, i, j, k);
|
|
nuclear@2
|
37 }
|
