dot_cross_vec.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   dot_cross_vec.c                                    :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: shongou <shongou@student.42tokyo.jp>       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/01/04 23:33:06 by shongou           #+#    #+#             */
/*   Updated: 2023/01/04 23:33:07 by shongou          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "minirt.h"

double	dot(t_vec a, t_vec b)
{
	return (a.x * b.x + a.y * b.y + a.z * b.z);
}

t_vec	cross(t_vec a, t_vec b)
{
	t_vec	vec;

	vec.x = a.y * b.z - a.z * b.y;
	vec.y = a.z * b.x - a.x * b.z;
	vec.z = a.x * b.y - a.y * b.x;
	return (vec);
}