#ifndef MAP_OBJECTS_H
#define MAP_OBJECTS_H
-
-
#include <stdio.h> /* for FILE typedef */
#include <stdint.h> /* for uint8_t */
#include "yx_uint16.h" /* for yx_uint16 coordinates */
-struct World;
-
-
-
-/* Player is non-standard: single and of a hard-coded type. */
-struct Player
-{
- struct yx_uint16 pos;
- uint8_t hitpoints;
-};
struct MapObj
{
struct MapObj * next; /* pointer to next one in map object chain */
+ struct MapObj * owns; /* chain of map objects owned / in inventory */
uint8_t id; /* individual map object's unique identifier */
uint8_t type; /* ID of appropriate map object definition */
uint8_t lifepoints; /* 0: object is inanimate; >0: hitpoints */
/* Initialize map object defnitions chain from file at path "filename". */
-extern void init_map_object_defs(struct World * world, char * filename);
+extern void init_map_object_defs(char * filename);
extern void free_map_object_defs(struct MapObjDef * mod_start);
-/* Build chain of "n" map objects of "tpye" to start at "mo_ptr_ptr". */
-extern struct MapObj ** build_map_objects(struct World * w,
- struct MapObj ** mo_ptr_ptr,
- uint8_t type, uint8_t n);
+
+/* Add new object(s) ("n": how many?) of "type" to map on random position(s).
+ * New animate objects are never placed in the same square with other animated
+ * ones.
+ */
+extern void add_map_object(uint8_t type);
+extern void add_map_objects(uint8_t type, uint8_t n);
+
/* Write map objects chain to "file". */
-extern void write_map_objects(struct World * world, FILE * file);
+extern void write_map_objects(FILE * file);
/* Read from "file" map objects chain; use "line" as char array for fgets() and
* expect strings of max. "linemax" length.
*/
-extern void read_map_objects(struct World * world, FILE * file,
- char * line, int linemax);
+extern void read_map_objects(FILE * file, char * line, int linemax);
+/* Move object of "id" from "source" inventory to "target" inventory. */
+extern void own_map_object(struct MapObj ** target, struct MapObj ** source,
+ uint8_t id);
+
+
+
+/* Get pointer to the MapObj struct that represents the player. */
+extern struct MapObj * get_player();
+
+
+
/* Get pointer to the map object definition of identifier "def_id". */
-extern struct MapObjDef * get_map_object_def(struct World * w, uint8_t id);
+extern struct MapObjDef * get_map_object_def(uint8_t id);
+
+
+
+/* Move not only "mo" to "pos", but also all map objects owned by it. */
+extern void set_object_position(struct MapObj * mo, struct yx_uint16 pos);