goat3d

annotate libs/vmath/basis_c.c @ 40:a5c5cec3cb88

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