149 lines
4.0 KiB
C
149 lines
4.0 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* search_map.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: hulamy <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2019/04/27 20:47:22 by hulamy #+# #+# */
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/* Updated: 2019/05/02 00:11:48 by hulamy ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "fillit.h"
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/*
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** function that look for the first place in the map for a tetri
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*/
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int find_place(unsigned int *tab, t_fillist *list, int size, int pos)
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{
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int i;
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int j;
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unsigned int mask;
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unsigned int tmp;
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// creer un mask avec les size bits de gauche a 1 (ex: 11111110000000000000000000000000)
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mask = ~0u << (32 - list->width);
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tmp = mask;
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i = pos;
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// boucle jusqu'a la dernier place pour le tetri dans la map ou qu'il fit dans un trou
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while (i <= (size - list->height) * size)
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{
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// pour ne pas deborder a droite de la map
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if (i % size == size - list->width + 1)
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i += list->width - 1;
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tmp = 0;
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// construit un tmp qui est une photo de la map de la taille du tetri a un emplacement donne
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j = (list->height - 1) * size + i;
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while (j >= i)
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{
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tmp >>= list->width;
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tmp |= (mask & (tab[j / 32] << j));
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tmp |= (mask & (tab[(j + list->width) / 32] >> (32 - j)));
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j -= size;
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}
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if (!((tmp >> 16) & list->tetribit))
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return (i + 1);
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i++;
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}
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return (0);
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}
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/*
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** function that add or remove a tetri on the map
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*/
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void add_remove(unsigned int *map, t_fillist *list, int size, int pos)
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{
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unsigned int mask;
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unsigned short tetri;
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int i;
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int j;
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tetri = list->tetribit;
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mask = ~0u << (32 - list->width);
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i = (list->height - 1) * list->width;
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j = (list->height - 1) * size + pos;
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// change les bits du tetri sur la map a la position donnee
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while (j >= pos)
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{
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map[j / 32] ^= (mask & tetri << (16 + i)) >> (j - 1);
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map[(j + size) / 32] ^= (mask & tetri << (16 + i)) << (j % 32 + 1);
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j -= size;
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i -= list->width;
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}
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}
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/*
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** function that recursively try to fill the map with the tetris
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*/
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int fill_map(unsigned int *map, t_fillist *list, int size)
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{
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int pos;
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pos = 0;
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if (!list)
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return (1);
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while ((pos = find_place(map, list, size, pos)))
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{
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// ft_putchar('\n'); ft_putendl("add_remove"); // POUR DEBUG
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add_remove(map, list, size, pos);
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print_map(map, size, size); // POUR DEBUG
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ft_putchar('\n'); // POUR DEBUG
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if (fill_map(map, list->next, size))
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return (list->position = pos);
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add_remove(map, list, size, pos);
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// print_map(map, size, size); // POUR DEBUG
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// ft_putchar('\n'); // POUR DEBUG
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}
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return (0);
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}
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/*
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** function that init the map to the right size fill with int equal to zeros
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*/
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unsigned int *init_map(int i)
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{
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unsigned int *new;
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int size;
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size = (i * i) / 32 + 1;
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new = (unsigned int *)malloc(sizeof(*new) * size);
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while (size)
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new[size--] = 0;
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return (new);
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}
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/*
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** function that send to "fill_map" a map of a certain size and increment its size untill it's solved
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*/
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void search_map(t_fillist *list)
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{
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t_fillist *tmp;
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unsigned int *map;
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int size;
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int i;
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size = 2;
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i = 1;
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tmp = list;
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// trouve le nombre de tetri en parcourant la liste chainee
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while ((tmp = tmp->next))
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i++;
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// trouve la taille minimale de la map
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while (size * size < i * 4)
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size++;
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map = init_map(size);
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// lance la recursive fill_map en augmentant la taille de la map tant qu'il n'y a pas de solution
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ft_putstr("test "); ft_putnbrendl(size); // POUR DEBUG
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while (!fill_map(map, list, size))
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map = init_map(size++);
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}
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