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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* 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);
}
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