56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* maths_vector_op.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: ntrahy <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2017/01/03 00:45:34 by ntrahy #+# #+# */
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/* Updated: 2017/01/08 12:56:51 by scebula ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "rt.h"
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#include <math.h>
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void add_to_vector(t_vect *v1, t_vect v2)
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{
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v1->x += v2.x;
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v1->y += v2.y;
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v1->z += v2.z;
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}
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void substract_to_vector(t_vect *v1, t_vect v2)
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{
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v1->x -= v2.x;
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v1->y -= v2.y;
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v1->z -= v2.z;
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}
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double dot_product_vector(t_vect v1, t_vect v2)
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{
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return (v1.x * v2.x + v1.y * v2.y + v1.z * v2.z);
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}
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t_vect cross_product_vector(t_vect v1, t_vect v2)
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{
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t_vect cross_product;
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cross_product = init_vector(v1.y * v2.z - v1.z * v2.y,
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v1.z * v2.x - v1.x * v2.z,
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v1.x * v2.y - v1.y * v2.x, 0);
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return (cross_product);
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}
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t_vect define_obj_normal(t_record *info,
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t_data *d, t_thread *thread)
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{
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t_vect obj_normal;
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obj_normal = ((t_vect (*)(t_obj *, t_vect, t_thread *))
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d->func->get_obj_normal[info->type])(info->obj,
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info->n_pos, thread);
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apply_tf(info->obj, &obj_normal, d, TF_NORMAL);
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return (obj_normal);
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}
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