games/minimal/mods/testentities/textures/testentities_cube4.png

/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#ifndef SERVEROBJECT_HEADER
#define SERVEROBJECT_HEADER

#include "irrlichttypes_bloated.h"
#include "activeobject.h"
#include "inventorymanager.h"
#include "itemgroup.h"
#include "util/container.h"

/*

Some planning
-------------

* Server environment adds an active object, which gets the id 1
* The active object list is scanned for each client once in a while,
  and it finds out what objects have been added that are not known
  by the client yet. This scan is initiated by the Server class and
  the result ends up directly to the server.
* A network packet is created with the info and sent to the client.
* Environment converts objects to static data and static data to
  objects, based on how close players are to them.

*/

class ServerEnvironment;
struct ItemStack;
class Player;
struct ToolCapabilities;
struct ObjectProperties;

class ServerActiveObject : public ActiveObject
{
public:
	/*
		NOTE: m_env can be NULL, but step() isn't called if it is.
		Prototypes are used that way.
	*/
	ServerActiveObject(ServerEnvironment *env, v3f pos);
	virtual ~ServerActiveObject();

	virtual ActiveObjectType getSendType() const
	{ return getType(); }

	// Called after id has been set and has been inserted in environment
	virtual void addedToEnvironment(u32 dtime_s){};
	// Called before removing from environment
	virtual void removingFromEnvironment(){};
	// Returns true if object's deletion is the job of the
	// environment
	virtual bool environmentDeletes() const
	{ return true; }
	
	// Create a certain type of ServerActiveObject
	static ServerActiveObject* create(ActiveObjectType type,
			ServerEnvironment *env, u16 id, v3f pos,
			const std::string &data);
	
	/*
		Some simple getters/setters
	*/
	v3f getBasePosition(){ return m_base_position; }
	void setBasePosition(v3f pos){ m_base_position = pos; }
	ServerEnvironment* getEnv(){ return m_env; }
	
	/*
		Some more dynamic interface
	*/
	
	virtual void setPos(v3f pos)
		{ setBasePosition(pos); }
	// continuous: if true, object does not stop immediately at pos
	virtual void moveTo(v3f pos, bool continuous)
		{ setBasePosition(pos); }
	// If object has moved less than this and data has not changed,
	// saving to disk may be omitted
	virtual float getMinimumSavedMovement();

	virtual std::string getDescription(){return "SAO";}
	
	/*
		Step object in time.
		Messages added to messages are sent to client over network.

		send_recommended:
			True at around 5-10 times a second, same for all objects.
			This is used to let objects send most of the data at the
			same time so that the data can be combined in a single
			packet.
	*/
	virtual void step(float dtime, bool send_recommended){}
	
	/*
		The return value of this is passed to the client-side object
		when it is created
	*/
	virtual std::string getClientInitializationData(u16 protocol_version){return "";}
	
	/*
		The return value of this is passed to the server-side object
		when it is created (converted from static to active - actually
		the data is the static form)
	*/
	virtual std::string getStaticData()
	{
		assert(isStaticAllowed());
		return "";
	}
	/*
		Return false in here to never save and instead remove object
		on unload. getStaticData() will not be called in that case.
	*/
	virtual bool isStaticAllowed() const
	{return true;}
	
	// Returns tool wear
	virtual int punch(v3f dir,
			const ToolCapabilities *toolcap=NULL,
			ServerActiveObject *puncher=NULL,
			float time_from_last_punch=1000000)
	{ return 0; }
	virtual void rightClick(ServerActiveObject *clicker)
	{}
	virtual void setHP(s16 hp)
	{}
	virtual s16 getHP() const
	{ return 0; }

	virtual void setArmorGroups(const ItemGroupList &armor_groups)
	{}
ofs	hex dump	ascii
0000	89 50 4e 47 0d 0a 1a 0a 00 00 00 0d 49 48 44 52 00 00 00 10 00 00 00 10 08 02 00 00 00 90 91 68	.PNG........IHDR...............h
0020	36 00 00 00 45 49 44 41 54 78 01 63 f8 cf c0 90 46 0a 00 a9 9e 74 32 88 48 84 d0 f0 1f 0c 40 0c	6...EIDATx.c....F....t2.H.....@.
0040	04 89 10 84 b3 11 1a 90 25 f0 90 e8 1a 68 6c 03 b2 a9 84 6d 20 12 51 a4 01 e1 56 da 69 80 01 d2	........%....hl....m..Q...V.i...
0060	fc 40 8e 06 aa 87 12 89 00 00 1f 7e cb 19 f4 9f 81 7c 00 00 00 00 49 45 4e 44 ae 42 60 82	.@.........~.....\|....IEND.B`.