src/serverobject.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2 of the License, or
   8 (at your option) any later version.
   9
  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 General Public License for more details.
  14
  15 You should have received a copy of the GNU 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.
  18 */
  19
  20 #include "serverobject.h"
  21 #include <fstream>
  22 #include "environment.h"
  23 #include "inventory.h"
  24 #include "collision.h"
  25
  26 core::map<u16, ServerActiveObject::Factory> ServerActiveObject::m_types;
  27
  28 ServerActiveObject::ServerActiveObject(ServerEnvironment *env, u16 id, v3f pos):
  29         ActiveObject(id),
  30         m_known_by_count(0),
  31         m_removed(false),
  32         m_static_exists(false),
  33         m_static_block(1337,1337,1337),
  34         m_env(env),
  35         m_base_position(pos)
  36 {
  37 }
  38
  39 ServerActiveObject::~ServerActiveObject()
  40 {
  41 }
  42
  43 ServerActiveObject* ServerActiveObject::create(u8 type,
  44                 ServerEnvironment *env, u16 id, v3f pos,
  45                 const std::string &data)
  46 {
  47         // Find factory function
  48         core::map<u16, Factory>::Node *n;
  49         n = m_types.find(type);
  50         if(n == NULL)
  51         {
  52                 // If factory is not found, just return.
  53                 dstream<<"WARNING: ServerActiveObject: No factory for type="
  54                                 <<type<<std::endl;
  55                 return NULL;
  56         }
  57
  58         Factory f = n->getValue();
  59         ServerActiveObject *object = (*f)(env, id, pos, data);
  60         return object;
  61 }
  62
  63 void ServerActiveObject::registerType(u16 type, Factory f)
  64 {
  65         core::map<u16, Factory>::Node *n;
  66         n = m_types.find(type);
  67         if(n)
  68                 return;
  69         m_types.insert(type, f);
  70 }
  71
  72
  73 /*
  74         TestSAO
  75 */
  76
  77 // Prototype
  78 TestSAO proto_TestSAO(NULL, 0, v3f(0,0,0));
  79
  80 TestSAO::TestSAO(ServerEnvironment *env, u16 id, v3f pos):
  81         ServerActiveObject(env, id, pos),
  82         m_timer1(0),
  83         m_age(0)
  84 {
  85         ServerActiveObject::registerType(getType(), create);
  86 }
  87
  88 ServerActiveObject* TestSAO::create(ServerEnvironment *env, u16 id, v3f pos,
  89                 const std::string &data)
  90 {
  91         return new TestSAO(env, id, pos);
  92 }
  93
  94 void TestSAO::step(float dtime, Queue<ActiveObjectMessage> &messages,
  95                 bool send_recommended)
  96 {
  97         m_age += dtime;
  98         if(m_age > 10)
  99         {
 100                 m_removed = true;
 101                 return;
 102         }
 103
 104         m_base_position.Y += dtime * BS * 2;
 105         if(m_base_position.Y > 8*BS)
 106                 m_base_position.Y = 2*BS;
 107
 108         if(send_recommended == false)
 109                 return;
 110
 111         m_timer1 -= dtime;
 112         if(m_timer1 < 0.0)
 113         {
 114                 m_timer1 += 0.125;
 115                 //dstream<<"TestSAO: id="<<getId()<<" sending data"<<std::endl;
 116
 117                 std::string data;
 118
 119                 data += itos(0); // 0 = position
 120                 data += " ";
 121                 data += itos(m_base_position.X);
 122                 data += " ";
 123                 data += itos(m_base_position.Y);
 124                 data += " ";
 125                 data += itos(m_base_position.Z);
 126
 127                 ActiveObjectMessage aom(getId(), false, data);
 128                 messages.push_back(aom);
 129         }
 130 }
 131
 132
 133 /*
 134         ItemSAO
 135 */
 136
 137 // Prototype
 138 ItemSAO proto_ItemSAO(NULL, 0, v3f(0,0,0), "");
 139
 140 ItemSAO::ItemSAO(ServerEnvironment *env, u16 id, v3f pos,
 141                 const std::string inventorystring):
 142         ServerActiveObject(env, id, pos),
 143         m_inventorystring(inventorystring),
 144         m_speed_f(0,0,0),
 145         m_last_sent_position(0,0,0)
 146 {
 147         ServerActiveObject::registerType(getType(), create);
 148 }
 149
 150 ServerActiveObject* ItemSAO::create(ServerEnvironment *env, u16 id, v3f pos,
 151                 const std::string &data)
 152 {
 153         std::istringstream is(data, std::ios::binary);
 154         char buf[1];
 155         // read version
 156         is.read(buf, 1);
 157         u8 version = buf[0];
 158         // check if version is supported
 159         if(version != 0)
 160                 return NULL;
 161         std::string inventorystring = deSerializeString(is);
 162         dstream<<"ItemSAO::create(): Creating item \""
 163                         <<inventorystring<<"\""<<std::endl;
 164         return new ItemSAO(env, id, pos, inventorystring);
 165 }
 166
 167 void ItemSAO::step(float dtime, Queue<ActiveObjectMessage> &messages,
 168                 bool send_recommended)
 169 {
 170         assert(m_env);
 171
 172         const float interval = 0.2;
 173         if(m_move_interval.step(dtime, interval)==false)
 174                 return;
 175         dtime = interval;
 176
 177         core::aabbox3d<f32> box(-BS/3.,0.0,-BS/3., BS/3.,BS*2./3.,BS/3.);
 178         collisionMoveResult moveresult;
 179         // Apply gravity
 180         m_speed_f += v3f(0, -dtime*9.81*BS, 0);
 181         // Maximum movement without glitches
 182         f32 pos_max_d = BS*0.25;
 183         // Limit speed
 184         if(m_speed_f.getLength()*dtime > pos_max_d)
 185                 m_speed_f *= pos_max_d / (m_speed_f.getLength()*dtime);
 186         v3f pos_f = getBasePosition();
 187         v3f pos_f_old = pos_f;
 188         moveresult = collisionMoveSimple(&m_env->getMap(), pos_max_d,
 189                         box, dtime, pos_f, m_speed_f);
 190
 191         if(send_recommended == false)
 192                 return;
 193
 194         if(pos_f.getDistanceFrom(m_last_sent_position) > 0.05*BS)
 195         {
 196                 setBasePosition(pos_f);
 197                 m_last_sent_position = pos_f;
 198
 199                 std::ostringstream os(std::ios::binary);
 200                 char buf[6];
 201                 // command (0 = update position)
 202                 buf[0] = 0;
 203                 os.write(buf, 1);
 204                 // pos
 205                 writeS32((u8*)buf, m_base_position.X*1000);
 206                 os.write(buf, 4);
 207                 writeS32((u8*)buf, m_base_position.Y*1000);
 208                 os.write(buf, 4);
 209                 writeS32((u8*)buf, m_base_position.Z*1000);
 210                 os.write(buf, 4);
 211                 // create message and add to list
 212                 ActiveObjectMessage aom(getId(), false, os.str());
 213                 messages.push_back(aom);
 214         }
 215 }
 216
 217 std::string ItemSAO::getClientInitializationData()
 218 {
 219         std::ostringstream os(std::ios::binary);
 220         char buf[6];
 221         // version
 222         buf[0] = 0;
 223         os.write(buf, 1);
 224         // pos
 225         writeS32((u8*)buf, m_base_position.X*1000);
 226         os.write(buf, 4);
 227         writeS32((u8*)buf, m_base_position.Y*1000);
 228         os.write(buf, 4);
 229         writeS32((u8*)buf, m_base_position.Z*1000);
 230         os.write(buf, 4);
 231         // inventorystring
 232         os<<serializeString(m_inventorystring);
 233         return os.str();
 234 }
 235
 236 std::string ItemSAO::getStaticData()
 237 {
 238         dstream<<__FUNCTION_NAME<<std::endl;
 239         std::ostringstream os(std::ios::binary);
 240         char buf[1];
 241         // version
 242         buf[0] = 0;
 243         os.write(buf, 1);
 244         // inventorystring
 245         os<<serializeString(m_inventorystring);
 246         return os.str();
 247 }
 248
 249 InventoryItem * ItemSAO::createInventoryItem()
 250 {
 251         try{
 252                 std::istringstream is(m_inventorystring, std::ios_base::binary);
 253                 InventoryItem *item = InventoryItem::deSerialize(is);
 254                 dstream<<__FUNCTION_NAME<<": m_inventorystring=\""
 255                                 <<m_inventorystring<<"\" -> item="<<item
 256                                 <<std::endl;
 257                 return item;
 258         }
 259         catch(SerializationError &e)
 260         {
 261                 dstream<<__FUNCTION_NAME<<": serialization error: "
 262                                 <<"m_inventorystring=\""<<m_inventorystring<<"\""<<std::endl;
 263                 return NULL;
 264         }
 265 }
 266
 267
 268 /*
 269         RatSAO
 270 */
 271
 272 // Prototype
 273 RatSAO proto_RatSAO(NULL, 0, v3f(0,0,0));
 274
 275 RatSAO::RatSAO(ServerEnvironment *env, u16 id, v3f pos):
 276         ServerActiveObject(env, id, pos),
 277         m_is_active(false),
 278         m_speed_f(0,0,0)
 279 {
 280         ServerActiveObject::registerType(getType(), create);
 281
 282         m_oldpos = v3f(0,0,0);
 283         m_last_sent_position = v3f(0,0,0);
 284         m_yaw = 0;
 285         m_counter1 = 0;
 286         m_counter2 = 0;
 287         m_age = 0;
 288         m_touching_ground = false;
 289 }
 290
 291 ServerActiveObject* RatSAO::create(ServerEnvironment *env, u16 id, v3f pos,
 292                 const std::string &data)
 293 {
 294         std::istringstream is(data, std::ios::binary);
 295         char buf[1];
 296         // read version
 297         is.read(buf, 1);
 298         u8 version = buf[0];
 299         // check if version is supported
 300         if(version != 0)
 301                 return NULL;
 302         return new RatSAO(env, id, pos);
 303 }
 304
 305 void RatSAO::step(float dtime, Queue<ActiveObjectMessage> &messages,
 306                 bool send_recommended)
 307 {
 308         assert(m_env);
 309
 310         if(m_is_active == false)
 311         {
 312                 if(m_inactive_interval.step(dtime, 0.5)==false)
 313                         return;
 314         }
 315
 316         /*
 317                 The AI
 318         */
 319
 320         /*m_age += dtime;
 321         if(m_age > 60)
 322         {
 323                 // Die
 324                 m_removed = true;
 325                 return;
 326         }*/
 327
 328         // Apply gravity
 329         m_speed_f.Y -= dtime*9.81*BS;
 330
 331         /*
 332                 Move around if some player is close
 333         */
 334         bool player_is_close = false;
 335         // Check connected players
 336         core::list<Player*> players = m_env->getPlayers(true);
 337         core::list<Player*>::Iterator i;
 338         for(i = players.begin();
 339                         i != players.end(); i++)
 340         {
 341                 Player *player = *i;
 342                 v3f playerpos = player->getPosition();
 343                 if(m_base_position.getDistanceFrom(playerpos) < BS*10.0)
 344                 {
 345                         player_is_close = true;
 346                         break;
 347                 }
 348         }
 349
 350         m_is_active = player_is_close;
 351
 352         if(player_is_close == false)
 353         {
 354                 m_speed_f.X = 0;
 355                 m_speed_f.Z = 0;
 356         }
 357         else
 358         {
 359                 // Move around
 360                 v3f dir(cos(m_yaw/180*PI),0,sin(m_yaw/180*PI));
 361                 f32 speed = 2*BS;
 362                 m_speed_f.X = speed * dir.X;
 363                 m_speed_f.Z = speed * dir.Z;
 364
 365                 if(m_touching_ground && (m_oldpos - m_base_position).getLength()
 366                                 < dtime*speed/2)
 367                 {
 368                         m_counter1 -= dtime;
 369                         if(m_counter1 < 0.0)
 370                         {
 371                                 m_counter1 += 1.0;
 372                                 m_speed_f.Y = 5.0*BS;
 373                         }
 374                 }
 375
 376                 {
 377                         m_counter2 -= dtime;
 378                         if(m_counter2 < 0.0)
 379                         {
 380                                 m_counter2 += (float)(myrand()%100)/100*3.0;
 381                                 m_yaw += ((float)(myrand()%200)-100)/100*180;
 382                                 m_yaw = wrapDegrees(m_yaw);
 383                         }
 384                 }
 385         }
 386
 387         m_oldpos = m_base_position;
 388
 389         /*
 390                 Move it, with collision detection
 391         */
 392
 393         core::aabbox3d<f32> box(-BS/3.,0.0,-BS/3., BS/3.,BS*2./3.,BS/3.);
 394         collisionMoveResult moveresult;
 395         // Maximum movement without glitches
 396         f32 pos_max_d = BS*0.25;
 397         // Limit speed
 398         if(m_speed_f.getLength()*dtime > pos_max_d)
 399                 m_speed_f *= pos_max_d / (m_speed_f.getLength()*dtime);
 400         v3f pos_f = getBasePosition();
 401         v3f pos_f_old = pos_f;
 402         moveresult = collisionMoveSimple(&m_env->getMap(), pos_max_d,
 403                         box, dtime, pos_f, m_speed_f);
 404         m_touching_ground = moveresult.touching_ground;
 405
 406         setBasePosition(pos_f);
 407
 408         if(send_recommended == false)
 409                 return;
 410
 411         if(pos_f.getDistanceFrom(m_last_sent_position) > 0.05*BS)
 412         {
 413                 m_last_sent_position = pos_f;
 414
 415                 std::ostringstream os(std::ios::binary);
 416                 // command (0 = update position)
 417                 writeU8(os, 0);
 418                 // pos
 419                 writeV3F1000(os, m_base_position);
 420                 // yaw
 421                 writeF1000(os, m_yaw);
 422                 // create message and add to list
 423                 ActiveObjectMessage aom(getId(), false, os.str());
 424                 messages.push_back(aom);
 425         }
 426 }
 427
 428 std::string RatSAO::getClientInitializationData()
 429 {
 430         std::ostringstream os(std::ios::binary);
 431         // version
 432         writeU8(os, 0);
 433         // pos
 434         writeV3F1000(os, m_base_position);
 435         return os.str();
 436 }
 437
 438 std::string RatSAO::getStaticData()
 439 {
 440         //dstream<<__FUNCTION_NAME<<std::endl;
 441         std::ostringstream os(std::ios::binary);
 442         // version
 443         writeU8(os, 0);
 444         return os.str();
 445 }
 446
 447 InventoryItem* RatSAO::createPickedUpItem()
 448 {
 449         std::istringstream is("CraftItem rat 1", std::ios_base::binary);
 450         InventoryItem *item = InventoryItem::deSerialize(is);
 451         return item;
 452 }
 453
 454