map: Add functions to query tile collisions

2 files changed, 22 insertions, 0 deletions

diff --git a/src/map.c b/src/map.c
index add4c3e..53dadaf 100644
--- a/src/map.c
+++ b/src/map.c
@@ -988,3 +988,21 @@ struct db_ball *db_map_get_balls(struct db_map *map)
 {
 	return map->ball_head;
 }
+
+int 
+db_map_tile_player_collides(struct db_map *map, int x, int y)
+{
+	int i;
+
+	i = y * map->w + x;
+	return (map->p_col[i / 8] & (1 << (i % 8))) != 0;
+}
+
+int 
+db_map_tile_ball_collides(struct db_map *map, int x, int y)
+{
+	int i;
+
+	i = y * map->w + x;
+	return (map->b_col[i / 8] & (1 << (i % 8))) != 0;
+}
diff --git a/src/map.h b/src/map.h
index bfd544d..a2cd112 100644
--- a/src/map.h
+++ b/src/map.h
@@ -34,5 +34,9 @@ void db_map_get_player(struct db_map *map, int *x, int *y, int *r, int *gid);
 void db_map_get_target(struct db_map *map, int *x, int *y, int *r, int *gid);
 struct db_ball *db_map_get_balls(struct db_map *map)
 	__attribute__((__pure__));
+int db_map_tile_player_collides(struct db_map *map, int x, int y)
+	__attribute__((__pure__));
+int db_map_tile_ball_collides(struct db_map *map, int x, int y)
+	__attribute__((__pure__));
 
 #endif  /* DB_MAP_H_ */