diff options
Diffstat (limited to 'vendor/libftm/src/mat4/ftm_mat4init_frustum.c')
| -rw-r--r-- | vendor/libftm/src/mat4/ftm_mat4init_frustum.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/vendor/libftm/src/mat4/ftm_mat4init_frustum.c b/vendor/libftm/src/mat4/ftm_mat4init_frustum.c new file mode 100644 index 0000000..1ba30b2 --- /dev/null +++ b/vendor/libftm/src/mat4/ftm_mat4init_frustum.c @@ -0,0 +1,27 @@ +/* ************************************************************************** */ +/* */ +/* ::: :::::::: */ +/* ftm_mat4init_frustum.c :+: :+: :+: */ +/* +:+ +:+ +:+ */ +/* By: charles <charles.cabergs@gmail.com> +#+ +:+ +#+ */ +/* +#+#+#+#+#+ +#+ */ +/* Created: 2020/05/12 15:37:26 by charles #+# #+# */ +/* Updated: 2020/05/12 17:29:53 by charles ### ########.fr */ +/* */ +/* ************************************************************************** */ + +#include "libftm_mat4.h" + +t_ftmmat4 *ftm_mat4init_frustum(t_ftmmat4 *mat4, t_ftmfrustum *frustum) +{ + ftm_mat4init_fill(mat4, 0.0); + + ftm_mat4set(mat4, 0, 0, (2.0 * frustum->near) / (frustum->right - frustum->left)); + ftm_mat4set(mat4, 1, 1, (2.0 * frustum->near) / (frustum->top - frustum->bottom)); + ftm_mat4set(mat4, 2, 2, (-(frustum->far + frustum->near)) / (frustum->far - frustum->near)); + ftm_mat4set(mat4, 0, 2, (frustum->right + frustum->left) / (frustum->right - frustum->left)); + ftm_mat4set(mat4, 1, 2, (frustum->top + frustum->bottom) / (frustum->top - frustum->bottom)); + ftm_mat4set(mat4, 2, 3, (-2.0 * frustum->far * frustum->near) / (frustum->far - frustum->near)); + ftm_mat4set(mat4, 3, 2, -1.0); + return (mat4); +} |