-void cell_to_pos(int cx, int cy, int32_t *px, int32_t *py);
-void pos_to_cell(int32_t px, int32_t py, int *cx, int *cy);
+void cell_to_pos(struct level *lvl, int cx, int cy, int32_t *px, int32_t *py);
+void pos_to_cell(struct level *lvl, int32_t px, int32_t py, int *cx, int *cy);