Function Script_Unit_IsValidDestination

src/script/unit.c:1682–1716

* Check if the given tile is a valid destination. In case of for example * a carry-all it checks if the unit carrying can be placed on destination. * In case of structures, it checks if you can walk into it. * * Stack: 1 - An encoded tile, indicating the destination. * * @param script The script engine to operate on. * @return ??. */

 * @return ??.
 */
uint16 Script_Unit_IsValidDestination(ScriptEngine *script)
{
	Unit *u;
	Unit *u2;
	uint16 encoded;
	uint16 index;

	u = g_scriptCurrentUnit;
	encoded = STACK_PEEK(1);
	index = Tools_Index_Decode(encoded);

	switch (Tools_Index_GetType(encoded)) {
		case IT_TILE:
			if (!Map_IsValidPosition(index)) return 1;
			if (u->o.linkedID == 0xFF) return 1;
			u2 = Unit_Get_ByIndex(u->o.linkedID);
			u2->o.position = Tools_Index_GetTile(encoded);
			if (!Unit_IsTileOccupied(u2)) return 0;
			u2->o.position.x = 0xFFFF;
			u2->o.position.y = 0xFFFF;
			return 1;

		case IT_STRUCTURE: {
			Structure *s;

			s = Structure_Get_ByIndex(index);
			if (s->o.houseID == Unit_GetHouseID(u)) return 0;
			if (u->o.linkedID == 0xFF) return 1;
			u2 = Unit_Get_ByIndex(u->o.linkedID);
			return Unit_IsValidMovementIntoStructure(u2, s) != 0 ? 1 : 0;
		}

		default: return 1;
	}
}

/**
 * Get a random tile around the Unit.