3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 #include <unordered_set>
23 #include "irrlichttypes_bloated.h"
24 #include "activeobject.h"
25 #include "inventorymanager.h"
26 #include "itemgroup.h"
27 #include "util/container.h"
34 * Server environment adds an active object, which gets the id 1
35 * The active object list is scanned for each client once in a while,
36 and it finds out what objects have been added that are not known
37 by the client yet. This scan is initiated by the Server class and
38 the result ends up directly to the server.
39 * A network packet is created with the info and sent to the client.
40 * Environment converts objects to static data and static data to
41 objects, based on how close players are to them.
45 class ServerEnvironment;
47 struct ToolCapabilities;
48 struct ObjectProperties;
49 struct PlayerHPChangeReason;
51 class ServerActiveObject : public ActiveObject
55 NOTE: m_env can be NULL, but step() isn't called if it is.
56 Prototypes are used that way.
58 ServerActiveObject(ServerEnvironment *env, v3f pos);
59 virtual ~ServerActiveObject() = default;
61 virtual ActiveObjectType getSendType() const
64 // Called after id has been set and has been inserted in environment
65 virtual void addedToEnvironment(u32 dtime_s){};
66 // Called before removing from environment
67 virtual void removingFromEnvironment(){};
68 // Returns true if object's deletion is the job of the
70 virtual bool environmentDeletes() const
73 // Safely mark the object for removal or deactivation
74 void markForRemoval();
75 void markForDeactivation();
77 // Create a certain type of ServerActiveObject
78 static ServerActiveObject* create(ActiveObjectType type,
79 ServerEnvironment *env, u16 id, v3f pos,
80 const std::string &data);
83 Some simple getters/setters
85 v3f getBasePosition() const { return m_base_position; }
86 void setBasePosition(v3f pos){ m_base_position = pos; }
87 ServerEnvironment* getEnv(){ return m_env; }
90 Some more dynamic interface
93 virtual void setPos(const v3f &pos)
94 { setBasePosition(pos); }
95 // continuous: if true, object does not stop immediately at pos
96 virtual void moveTo(v3f pos, bool continuous)
97 { setBasePosition(pos); }
98 // If object has moved less than this and data has not changed,
99 // saving to disk may be omitted
100 virtual float getMinimumSavedMovement();
102 virtual std::string getDescription(){return "SAO";}
106 Messages added to messages are sent to client over network.
109 True at around 5-10 times a second, same for all objects.
110 This is used to let objects send most of the data at the
111 same time so that the data can be combined in a single
114 virtual void step(float dtime, bool send_recommended){}
117 The return value of this is passed to the client-side object
120 virtual std::string getClientInitializationData(u16 protocol_version) {return "";}
123 The return value of this is passed to the server-side object
124 when it is created (converted from static to active - actually
125 the data is the static form)
127 virtual void getStaticData(std::string *result) const
129 assert(isStaticAllowed());
134 Return false in here to never save and instead remove object
135 on unload. getStaticData() will not be called in that case.
137 virtual bool isStaticAllowed() const
141 Return false here to never unload the object.
142 isStaticAllowed && shouldUnload -> unload when out of active block range
143 !isStaticAllowed && shouldUnload -> unload when block is unloaded
145 virtual bool shouldUnload() const
149 virtual u16 punch(v3f dir,
150 const ToolCapabilities *toolcap = nullptr,
151 ServerActiveObject *puncher = nullptr,
152 float time_from_last_punch = 1000000.0f)
154 virtual void rightClick(ServerActiveObject *clicker)
156 virtual void setHP(s32 hp, const PlayerHPChangeReason &reason)
158 virtual u16 getHP() const
161 virtual void setArmorGroups(const ItemGroupList &armor_groups)
163 virtual const ItemGroupList &getArmorGroups() const
164 { static ItemGroupList rv; return rv; }
165 virtual void setAnimation(v2f frames, float frame_speed, float frame_blend, bool frame_loop)
167 virtual void getAnimation(v2f *frames, float *frame_speed, float *frame_blend, bool *frame_loop)
169 virtual void setAnimationSpeed(float frame_speed)
171 virtual void setBonePosition(const std::string &bone, v3f position, v3f rotation)
173 virtual void getBonePosition(const std::string &bone, v3f *position, v3f *lotation)
175 virtual const std::unordered_set<int> &getAttachmentChildIds() const
176 { static std::unordered_set<int> rv; return rv; }
177 virtual ServerActiveObject *getParent() const { return nullptr; }
178 virtual ObjectProperties* accessObjectProperties()
180 virtual void notifyObjectPropertiesModified()
183 // Inventory and wielded item
184 virtual Inventory *getInventory() const
186 virtual InventoryLocation getInventoryLocation() const
187 { return InventoryLocation(); }
188 virtual void setInventoryModified()
190 virtual std::string getWieldList() const
192 virtual u16 getWieldIndex() const
194 virtual ItemStack getWieldedItem(ItemStack *selected,
195 ItemStack *hand = nullptr) const;
196 virtual bool setWieldedItem(const ItemStack &item);
197 inline void attachParticleSpawner(u32 id)
199 m_attached_particle_spawners.insert(id);
201 inline void detachParticleSpawner(u32 id)
203 m_attached_particle_spawners.erase(id);
206 std::string generateUpdateInfantCommand(u16 infant_id, u16 protocol_version);
208 void dumpAOMessagesToQueue(std::queue<ActiveObjectMessage> &queue);
211 Number of players which know about this object. Object won't be
212 deleted until this is 0 to keep the id preserved for the right
215 u16 m_known_by_count = 0;
218 A getter that unifies the above to answer the question:
219 "Can the environment still interact with this object?"
221 inline bool isGone() const
222 { return m_pending_removal || m_pending_deactivation; }
224 inline bool isPendingRemoval() const
225 { return m_pending_removal; }
228 Whether the object's static data has been stored to a block
230 bool m_static_exists = false;
232 The block from which the object was loaded from, and in which
233 a copy of the static data resides.
235 v3s16 m_static_block = v3s16(1337,1337,1337);
238 virtual void onMarkedForDeactivation() {}
239 virtual void onMarkedForRemoval() {}
241 virtual void onAttach(int parent_id) {}
242 virtual void onDetach(int parent_id) {}
244 ServerEnvironment *m_env;
246 std::unordered_set<u32> m_attached_particle_spawners;
249 Same purpose as m_pending_removal but for deactivation.
250 deactvation = save static data in block, remove active object
252 If this is set alongside with m_pending_removal, removal takes
254 Note: Do not assign this directly, use markForDeactivation() instead.
256 bool m_pending_deactivation = false;
259 - Whether this object is to be removed when nobody knows about
261 - Removal is delayed to preserve the id for the time during which
262 it could be confused to some other object by some client.
263 - This is usually set to true by the step() method when the object wants
264 to be deleted but can be set by anything else too.
265 Note: Do not assign this directly, use markForRemoval() instead.
267 bool m_pending_removal = false;
270 Queue of messages to be sent to the client
272 std::queue<ActiveObjectMessage> m_messages_out;