70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* center_vertices.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: gbrochar <gbrochar@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2020/12/26 06:11:21 by gbrochar #+# #+# */
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/* Updated: 2020/12/26 06:25:59 by gbrochar ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "scop.h"
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#include "vec3.h"
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void center_vertices(t_buf_d *vertices)
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{
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t_vec3 average;
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t_vec3 max = { .x = DBL_MIN, .y = DBL_MIN, .z = DBL_MIN };
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t_vec3 min = { .x = DBL_MAX, .y = DBL_MAX, .z = DBL_MAX };
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for (size_t i = 0; i < vertices->ptr; i++)
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{
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if (i % 3 == 0) {
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if (vertices->data[i] > max.x)
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max.x = vertices->data[i];
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if (vertices->data[i] < min.x)
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min.x = vertices->data[i];
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average.x += vertices->data[i];
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}
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else if (i % 3 == 1) {
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if (vertices->data[i] > max.y)
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max.y = vertices->data[i];
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if (vertices->data[i] < min.y)
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min.y = vertices->data[i];
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average.y += vertices->data[i];
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}
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else if (i % 3 == 2) {
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if (vertices->data[i] > max.z)
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max.z = vertices->data[i];
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if (vertices->data[i] < min.z)
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min.z = vertices->data[i];
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average.z += vertices->data[i];
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}
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}
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average.x /= (vertices->ptr / 3);
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average.y /= (vertices->ptr / 3);
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average.z /= (vertices->ptr / 3);
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double max_k = max.x - min.x;
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max_k = max_k > max.y - min.y ? max_k : max.y - min.y;
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max_k = max_k > max.z - min.z ? max_k : max.z - min.z;
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for (size_t i = 0; i < vertices->ptr; i++)
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{
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if (i % 3 == 0) {
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vertices->data[i] -= average.x;
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vertices->data[i] /= max_k;
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}
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else if (i % 3 == 1) {
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vertices->data[i] -= average.y;
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vertices->data[i] /= max_k;
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}
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else if (i % 3 == 2) {
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vertices->data[i] -= average.z;
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vertices->data[i] /= max_k;
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}
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}
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}
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