Added mat4 in libftm, can rotate, scale and translate vector

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);
+}