mirror of https://git.sr.ht/~kikoodx/momento
85 lines
2.3 KiB
C
85 lines
2.3 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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#include "particles.h"
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#include <libimg.h>
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extern struct Level level;
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extern img_t img_coin_particle;
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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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int margin)
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{
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const int lx = x + margin;
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const int rx = x + PLAYER_WIDTH - 1 - margin;
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const int ty = y + margin;
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const int dy = y + PLAYER_HEIGHT - 1 - margin;
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collisions[UP_LEFT] = collide_single(lx, ty);
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collisions[UP_RIGHT] = collide_single(rx, ty);
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collisions[DOWN_LEFT] = collide_single(lx, 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 margin, int update)
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{
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if (update)
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player_collide(collisions, x, y, margin);
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int i = COLLIDE_POINTS;
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while (i-- > 0)
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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, int margin)
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{
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const int lx = x + margin;
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const int rx = x + PLAYER_WIDTH - 1 - margin;
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const int ty = y + margin;
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const int dy = y + PLAYER_HEIGHT - 1 - margin;
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return collide_sub_single(lx, ty, sub, rep) +
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collide_sub_single(rx, ty, sub, rep) +
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collide_sub_single(lx, 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, 0, 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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return level_get_tile(tx, ty);
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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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if (sub == TILE_GOLD)
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particle_create(&img_coin_particle, (int)(x / TILE_WIDTH) * TILE_WIDTH, (int)(y / TILE_HEIGHT) * TILE_HEIGHT, TILE_WIDTH, 2);
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return 1;
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}
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return 0;
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}
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