/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   map_helpers.c                                      :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: apago <apago@student.42.fr>                +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/04/05 06:50:28 by tischmid          #+#    #+#             */
/*   Updated: 2023/04/05 19:06:18 by apago            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "ft_bsq.h"

// index to column
int	itoc(int idx, int width)
{
	return (idx % width);
}

// index to row
int	itor(int idx, int width)
{
	return (idx / width);
}

int	get_index(t_map *map, int idx, int bottom, int right)
{
	int	row;
	int	col;

	if ((bottom | right) == 0)
		return (map->index[idx]);
	row = itor(idx, map->meta.width);
	col = itoc(idx, map->meta.width);
	row += bottom;
	col += right;
	if (row >= map->meta.height || col >= map->meta.width || col < 0 || row < 0)
		return (0);
	idx = col + row * map->meta.width;
	return (map->index[idx]);
}