diff options
Diffstat (limited to 'vendor/libftm/src/mat4/ftm_mat4mul.c')
| -rw-r--r-- | vendor/libftm/src/mat4/ftm_mat4mul.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/vendor/libftm/src/mat4/ftm_mat4mul.c b/vendor/libftm/src/mat4/ftm_mat4mul.c new file mode 100644 index 0000000..553e47c --- /dev/null +++ b/vendor/libftm/src/mat4/ftm_mat4mul.c @@ -0,0 +1,40 @@ +/* ************************************************************************** */ +/* */ +/* ::: :::::::: */ +/* ftm_mat4mul.c :+: :+: :+: */ +/* +:+ +:+ +:+ */ +/* By: charles <charles.cabergs@gmail.com> +#+ +:+ +#+ */ +/* +#+#+#+#+#+ +#+ */ +/* Created: 2020/05/12 11:22:20 by charles #+# #+# */ +/* Updated: 2020/05/12 14:03:19 by charles ### ########.fr */ +/* */ +/* ************************************************************************** */ + +#include "libftm_mat4.h" + +static float st_dot(t_ftmmat4 *a, t_ftmmat4 *b, int y, int x) +{ + return (ftm_mat4get(a, y, 0) * ftm_mat4get(b, 0, x) + + ftm_mat4get(a, y, 1) * ftm_mat4get(b, 1, x) + + ftm_mat4get(a, y, 2) * ftm_mat4get(b, 2, x) + + ftm_mat4get(a, y, 3) * ftm_mat4get(b, 3, x)); +} + +t_ftmmat4 *ftm_mat4mul(t_ftmmat4 *dst, t_ftmmat4 *other) +{ + t_ftmmat4 tmp; + int i; + int j; + + i = -1; + while (++i < 4) + { + j = -1; + while (++j < 4) + ftm_mat4set(&tmp, i, j, st_dot(dst, other, i, j)); + } + i = -1; + while (++i < 4 * 4) + dst->m[i] = tmp.m[i]; + return (dst); +} |