Added comments and todo to collide.c

src/collide.c

@@ -18,6 +18,9 @@ uint8_t collide_point(Vec point, const Level *level, uint layer_id) {
 	}
 }
 
+/* TODO: 'collide{right,left,up,down} are a bad idea, should replace all
+ * of these for by an unique function i.e. 'player_collide'.
+ */
 bool collide_right(Player *player, Vec position, const Level *level, uint layer_id) {
 	Vec pos;
 	vec_cpy(&pos, position);