vector_op.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   vector_op.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: gphilips <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2017/11/29 17:09:39 by gphilips          #+#    #+#             */
/*   Updated: 2017/12/22 16:15:27 by gphilips         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "rtv1.h"

t_vec	vec_add(t_vec *v1, t_vec *v2)
{
	t_vec	v;

	v.x = v1->x + v2->x;
	v.y = v1->y + v2->y;
	v.z = v1->z + v2->z;
	return (v);
}

t_vec	vec_sub(t_vec *v1, t_vec *v2)
{
	t_vec	v;

	v.x = v1->x - v2->x;
	v.y = v1->y - v2->y;
	v.z = v1->z - v2->z;
	return (v);
}

t_vec	vec_scale(double scale, t_vec *v1)
{
	t_vec	v;

	v.x = scale * v1->x;
	v.y = scale * v1->y;
	v.z = scale * v1->z;
	return (v);
}

t_vec	vec_negative(t_vec *v)
{
	t_vec	n;

	n.x = -v->x;
	n.y = -v->y;
	n.z = -v->z;
	return (n);
}

t_vec	vec_cross(t_vec *v1, t_vec *v2)
{
	t_vec	v;

	v.x = v1->y * v2->z - v1->z * v2->y;
	v.y = v2->x * v1->z - v2->z * v1->x;
	v.z = v1->x * v2->y - v1->y * v2->x;
	return (v);
}