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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* center.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: charles <charles.cabergs@gmail.com> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/05/13 10:48:15 by charles #+# #+# */
/* Updated: 2020/05/13 16:43:38 by charles ### ########.fr */
/* */
/* ************************************************************************** */
#include "scop.h"
void st_find_boundary(float *vertices, size_t vertices_len, t_ftmvec3 *min, t_ftmvec3 *max)
{
size_t i;
ftm_vec3init(min, INFINITY, INFINITY, INFINITY);
ftm_vec3init(max, -INFINITY, -INFINITY, -INFINITY);
i = 0;
while (i < vertices_len * 4)
{
if (vertices[i] > max->x)
max->x = vertices[i];
if (vertices[i] < min->x)
min->x = vertices[i];
i++;
if (vertices[i] > max->y)
max->y = vertices[i];
if (vertices[i] < min->y)
min->y = vertices[i];
i++;
if (vertices[i] > max->z)
max->z = vertices[i];
if (vertices[i] < min->z)
min->z = vertices[i];
i += 2;
}
}
void center_mat4_init_translate(t_ftmmat4 *dst, float *vertices, size_t vertices_len)
{
t_ftmvec3 min;
t_ftmvec3 max;
st_find_boundary(vertices, vertices_len, &min, &max);
ftm_mat4init_eye(dst, 1.0);
ftm_mat4translate(dst, -(max.x + min.x) / 2.0f,
-(max.y + min.y) / 2.0f,
-(max.z + min.z) / 2.0f);
}
float *texture_coord_create(float *vertices, size_t vertices_len)
{
t_ftmvec3 min;
t_ftmvec3 max;
float *coords;
size_t i;
if ((coords = malloc(sizeof(float) * (vertices_len * 2))) == NULL)
return (NULL);
st_find_boundary(vertices, vertices_len, &min, &max);
i = 0;
while (i < vertices_len)
{
coords[i * 2 + 0] = (vertices[i * 4 + 0] - min.x) * (1.0 / (max.x - min.x));
coords[i * 2 + 1] = (vertices[i * 4 + 1] - min.y) * (1.0 / (max.y - min.y));
i++;
}
return (coords);
}
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