45 lines
1.7 KiB
C
45 lines
1.7 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* vector_math2.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: vvobis <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2024/11/26 20:02:37 by vvobis #+# #+# */
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/* Updated: 2024/11/26 20:03:58 by vvobis ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "../../minirt.h"
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t_vector rot_y(t_vector vec, int dir)
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{
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return ((t_vector){vec.x * COS_10 + vec.z * SIN_10 * dir, vec.y, \
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vec.x * dir * -SIN_10 + vec.z * COS_10});
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}
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t_vector rot_z(t_vector vec, int dir)
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{
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return ((t_vector){vec.x * COS_10 - vec.y * SIN_10 * dir, \
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vec.x * SIN_10 * dir + vec.y * COS_10, vec.z});
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}
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t_vector cross_product(t_vector a, t_vector b)
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{
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return ((t_vector){a.y * b.z - a.z * b.y, a.z * b.x - a.x * b.z, \
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a.x * b.y - a.y * b.x});
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}
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t_vector reflect_vector(t_vector incoming, t_vector axis)
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{
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return (vector_subtract(incoming, \
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scale_vector(axis, 2 * dot_product(axis, incoming))));
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}
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void calc_hit_point_vectors(t_hit_point *hit, t_vector ray, t_vector n)
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{
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hit->n = n;
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hit->v = scale_vector(ray, -1);
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hit->r = reflect_vector(ray, n);
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}
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