58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
#include <gint/defs/types.h>
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#include <stdbool.h>
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#include "collide.h"
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#include "conf.h"
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#include "level.h"
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#include "tiles.h"
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Tile_flags collide_point(Vec point, const Level *level) {
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Vec cursor; /* the final position to test */
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vec_cpy(&cursor, point);
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vec_div(&cursor, TILE_SIZE); /* get the expected tile ID */
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if (point.x < 0 || point.y < 0 ||
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cursor.x >= level->width || cursor.y >= level->height) {
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return P_AIR; /* the point is out of bounds */
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}
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else {
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const Tile tile_id = level->layers[level->solid_layer][cursor.x + cursor.y * level->width];
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return tile_get_flags(tile_id);
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}
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}
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Tile_flags player_collide_or(Player *player, Vec position, const Level *level) {
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Vec pos;
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vec_cpy(&pos, position);
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Tile_flags flags = 0;
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flags |= collide_point(pos, level);
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pos.x += player->hbox.x;
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flags |= collide_point(pos, level);
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pos.y += player->hbox.y;
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flags |= collide_point(pos, level);
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pos.x -= player->hbox.x;
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flags |= collide_point(pos, level);
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return flags;
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}
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Tile_flags player_collide_and(Player *player, Vec position, const Level *level) {
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/* DRY, get the collision flags and do &= on flags if there is
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* any. */
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void process_flags(Player *player, const Level *level, Vec pos, Tile_flags *flags) {
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Tile tile_flags = collide_point(pos, level);
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if (tile_flags) {
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*flags &= tile_flags;
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}
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}
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Vec pos;
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vec_cpy(&pos, position);
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Tile_flags flags = -1; /* since unsigned, max value */
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process_flags(player, level, pos, &flags);
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pos.x += player->hbox.x;
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process_flags(player, level, pos, &flags);
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pos.y += player->hbox.y;
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process_flags(player, level, pos, &flags);
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pos.x -= player->hbox.x;
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process_flags(player, level, pos, &flags);
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return flags;
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}
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