mirror of https://git.sr.ht/~kikoodx/momento
76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-3.0-or-later */
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/* Copyright (C) 2021 KikooDX */
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#include "conf.h"
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#include "level.h"
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#include "player.h"
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#include "tiles.h"
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extern struct Level level;
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static Tile collide_single(int x, int y);
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static int collide_sub_single(int x, int y, Tile sub, Tile rep);
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void player_collide(Tile collisions[COLLIDE_POINTS], int x, int y)
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{
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const int rx = x + PLAYER_WIDTH - 1;
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const int dy = y + PLAYER_HEIGHT - 1;
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collisions[UP_LEFT] = collide_single(x, y);
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collisions[UP_RIGHT] = collide_single(rx, y);
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collisions[DOWN_LEFT] = collide_single(x, dy);
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collisions[DOWN_RIGHT] = collide_single(rx, dy);
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}
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int player_collide_tile(Tile collisions[COLLIDE_POINTS], int x, int y,
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Tile tile, int update)
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{
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int i;
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if (update)
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player_collide(collisions, x, y);
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for (i = 0; i < COLLIDE_POINTS; i += 1)
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if (collisions[i] == tile)
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return 1;
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return 0;
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}
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/* collide and replace tiles, return the number of tiles affecter */
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int player_collide_sub(int x, int y, Tile sub, Tile rep)
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{
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const int rx = x + PLAYER_WIDTH - 1;
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const int dy = y + PLAYER_HEIGHT - 1;
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return collide_sub_single(x, y, sub, rep) +
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collide_sub_single(rx, y, sub, rep) +
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collide_sub_single(x, dy, sub, rep) +
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collide_sub_single(rx, dy, sub, rep);
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}
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int player_collide_solid(int x, int y)
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{
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Tile collisions[COLLIDE_POINTS];
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return player_collide_tile(collisions, x, y, TILE_SOLID, 1);
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}
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static Tile collide_single(int x, int y)
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{
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const int tx = x / TILE_WIDTH;
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const int ty = y / TILE_WIDTH;
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/* out of bounds handling */
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if (x < 0 || y < 0 || tx >= level.width || ty >= level.height)
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return TILE_OOB;
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return level.data[tx + ty * level.width];
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}
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/* try collide and replace tile at pixel position, return 1 if tile
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* replaced */
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static int collide_sub_single(int x, int y, Tile sub, Tile rep)
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{
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if (collide_single(x, y) == sub) {
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const int tile_index =
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(int)(x / TILE_WIDTH) +
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(int)(y / TILE_WIDTH) * level.width;
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level.data[tile_index] = rep;
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return 1;
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}
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return 0;
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}
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