55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* maths_vector_calc.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 00:45:27 by ntrahy #+# #+# */
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/* Updated: 2017/01/03 00:45:28 by ntrahy ### ########.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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t_vect copy_vector(t_vect v)
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{
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t_vect v_new;
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v_new.x = v.x;
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v_new.y = v.y;
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v_new.z = v.z;
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v_new.w = v.w;
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return (v_new);
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}
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void negative_vector(t_vect *v)
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{
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v->x *= -1;
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v->y *= -1;
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v->z *= -1;
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}
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double vector_magnitude(t_vect v)
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{
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return (sqrt(v.x * v.x + v.y * v.y + v.z * v.z));
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}
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void normalize_vector(t_vect *v)
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{
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double magnitude;
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magnitude = vector_magnitude(*v);
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v->x /= magnitude;
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v->y /= magnitude;
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v->z /= magnitude;
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}
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void mult_vector(t_vect *v, double d)
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{
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v->x *= d;
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v->y *= d;
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v->z *= d;
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}
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