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Imported Upstream version 0.13.2+dsfg1

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Sebastian Ramacher 2016-02-24 00:16:51 +01:00
commit fb3990e9e5
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libobs/graphics/vec4.c Normal file
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/******************************************************************************
Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#include "vec4.h"
#include "vec3.h"
#include "matrix4.h"
void vec4_from_vec3(struct vec4 *dst, const struct vec3 *v)
{
dst->m = v->m;
dst->w = 1.0f;
}
void vec4_transform(struct vec4 *dst, const struct vec4 *v,
const struct matrix4 *m)
{
struct vec4 temp;
struct matrix4 transpose;
matrix4_transpose(&transpose, m);
temp.x = vec4_dot(&transpose.x, v);
temp.y = vec4_dot(&transpose.y, v);
temp.z = vec4_dot(&transpose.z, v);
temp.w = vec4_dot(&transpose.t, v);
vec4_copy(dst, &temp);
}