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         dstream<<"Server: ItemSAO created with inventorystring=\""
 148                         <<m_inventorystring<<"\""<<std::endl;
 149         ServerActiveObject::registerType(getType(), create);
 150 }
 151
 152 ServerActiveObject* ItemSAO::create(ServerEnvironment *env, u16 id, v3f pos,
 153                 const std::string &data)
 154 {
 155         std::istringstream is(data, std::ios::binary);
 156         char buf[1];
 157         // read version
 158         is.read(buf, 1);
 159         u8 version = buf[0];
 160         // check if version is supported
 161         if(version != 0)
 162                 return NULL;
 163         std::string inventorystring = deSerializeString(is);
 164         dstream<<"ItemSAO::create(): Creating item \""
 165                         <<inventorystring<<"\""<<std::endl;
 166         return new ItemSAO(env, id, pos, inventorystring);
 167 }
 168
 169 void ItemSAO::step(float dtime, Queue<ActiveObjectMessage> &messages,
 170                 bool send_recommended)
 171 {
 172         core::aabbox3d<f32> box(-BS/3.,0.0,-BS/3., BS/3.,BS*2./3.,BS/3.);
 173         collisionMoveResult moveresult;
 174         // Apply gravity
 175         m_speed_f += v3f(0, -dtime*9.81*BS, 0);
 176         // Maximum movement without glitches
 177         f32 pos_max_d = BS*0.25;
 178         // Limit speed
 179         if(m_speed_f.getLength()*dtime > pos_max_d)
 180                 m_speed_f *= pos_max_d / (m_speed_f.getLength()*dtime);
 181         v3f pos_f = getBasePosition();
 182         v3f pos_f_old = pos_f;
 183         moveresult = collisionMoveSimple(&m_env->getMap(), pos_max_d,
 184                         box, dtime, pos_f, m_speed_f);
 185
 186         if(send_recommended == false)
 187                 return;
 188
 189         if(pos_f.getDistanceFrom(m_last_sent_position) > 0.05*BS)
 190         {
 191                 setBasePosition(pos_f);
 192                 m_last_sent_position = pos_f;
 193
 194                 std::ostringstream os(std::ios::binary);
 195                 char buf[6];
 196                 // command (0 = update position)
 197                 buf[0] = 0;
 198                 os.write(buf, 1);
 199                 // pos
 200                 writeS32((u8*)buf, m_base_position.X*1000);
 201                 os.write(buf, 4);
 202                 writeS32((u8*)buf, m_base_position.Y*1000);
 203                 os.write(buf, 4);
 204                 writeS32((u8*)buf, m_base_position.Z*1000);
 205                 os.write(buf, 4);
 206                 // create message and add to list
 207                 ActiveObjectMessage aom(getId(), false, os.str());
 208                 messages.push_back(aom);
 209         }
 210 }
 211
 212 std::string ItemSAO::getClientInitializationData()
 213 {
 214         std::ostringstream os(std::ios::binary);
 215         char buf[6];
 216         // version
 217         buf[0] = 0;
 218         os.write(buf, 1);
 219         // pos
 220         writeS32((u8*)buf, m_base_position.X*1000);
 221         os.write(buf, 4);
 222         writeS32((u8*)buf, m_base_position.Y*1000);
 223         os.write(buf, 4);
 224         writeS32((u8*)buf, m_base_position.Z*1000);
 225         os.write(buf, 4);
 226         // inventorystring
 227         os<<serializeString(m_inventorystring);
 228         return os.str();
 229 }
 230
 231 std::string ItemSAO::getStaticData()
 232 {
 233         dstream<<__FUNCTION_NAME<<std::endl;
 234         std::ostringstream os(std::ios::binary);
 235         char buf[1];
 236         // version
 237         buf[0] = 0;
 238         os.write(buf, 1);
 239         // inventorystring
 240         os<<serializeString(m_inventorystring);
 241         return os.str();
 242 }
 243
 244 InventoryItem * ItemSAO::createInventoryItem()
 245 {
 246         try{
 247                 std::istringstream is(m_inventorystring, std::ios_base::binary);
 248                 InventoryItem *item = InventoryItem::deSerialize(is);
 249                 dstream<<__FUNCTION_NAME<<": m_inventorystring=\""
 250                                 <<m_inventorystring<<"\" -> item="<<item
 251                                 <<std::endl;
 252                 return item;
 253         }
 254         catch(SerializationError &e)
 255         {
 256                 dstream<<__FUNCTION_NAME<<": serialization error: "
 257                                 <<"m_inventorystring=\""<<m_inventorystring<<"\""<<std::endl;
 258                 return NULL;
 259         }
 260 }
 261
 262
 263 /*
 264         RatSAO
 265 */
 266
 267 // Prototype
 268 RatSAO proto_RatSAO(NULL, 0, v3f(0,0,0));
 269
 270 RatSAO::RatSAO(ServerEnvironment *env, u16 id, v3f pos):
 271         ServerActiveObject(env, id, pos),
 272         m_speed_f(0,0,0)
 273 {
 274         dstream<<"Server: RatSAO created"<<std::endl;
 275         ServerActiveObject::registerType(getType(), create);
 276
 277         m_oldpos = v3f(0,0,0);
 278         m_last_sent_position = v3f(0,0,0);
 279         m_yaw = 0;
 280         m_counter1 = 0;
 281         m_counter2 = 0;
 282         m_age = 0;
 283         m_touching_ground = false;
 284 }
 285
 286 ServerActiveObject* RatSAO::create(ServerEnvironment *env, u16 id, v3f pos,
 287                 const std::string &data)
 288 {
 289         std::istringstream is(data, std::ios::binary);
 290         char buf[1];
 291         // read version
 292         is.read(buf, 1);
 293         u8 version = buf[0];
 294         // check if version is supported
 295         if(version != 0)
 296                 return NULL;
 297         return new RatSAO(env, id, pos);
 298 }
 299
 300 void RatSAO::step(float dtime, Queue<ActiveObjectMessage> &messages,
 301                 bool send_recommended)
 302 {
 303         /*
 304                 The AI
 305         */
 306
 307         m_age += dtime;
 308         if(m_age > 60)
 309         {
 310                 // Die
 311                 m_removed = true;
 312                 return;
 313         }
 314
 315         // Apply gravity
 316         m_speed_f.Y -= dtime*9.81*BS;
 317
 318         /*
 319                 Move around if some player is close
 320         */
 321         bool player_is_close = false;
 322         // Check connected players
 323         core::list<Player*> players = m_env->getPlayers(true);
 324         core::list<Player*>::Iterator i;
 325         for(i = players.begin();
 326                         i != players.end(); i++)
 327         {
 328                 Player *player = *i;
 329                 v3f playerpos = player->getPosition();
 330                 if(m_base_position.getDistanceFrom(playerpos) < BS*10.0)
 331                 {
 332                         player_is_close = true;
 333                         break;
 334                 }
 335         }
 336
 337         if(player_is_close == false)
 338         {
 339                 m_speed_f.X = 0;
 340                 m_speed_f.Z = 0;
 341         }
 342         else
 343         {
 344                 // Move around
 345                 v3f dir(cos(m_yaw/180*PI),0,sin(m_yaw/180*PI));
 346                 f32 speed = 2*BS;
 347                 m_speed_f.X = speed * dir.X;
 348                 m_speed_f.Z = speed * dir.Z;
 349
 350                 if(m_touching_ground && (m_oldpos - m_base_position).getLength()
 351                                 < dtime*speed/2)
 352                 {
 353                         m_counter1 -= dtime;
 354                         if(m_counter1 < 0.0)
 355                         {
 356                                 m_counter1 += 1.0;
 357                                 m_speed_f.Y = 5.0*BS;
 358                         }
 359                 }
 360
 361                 {
 362                         m_counter2 -= dtime;
 363                         if(m_counter2 < 0.0)
 364                         {
 365                                 m_counter2 += (float)(myrand()%100)/100*3.0;
 366                                 m_yaw += ((float)(myrand()%200)-100)/100*180;
 367                                 m_yaw = wrapDegrees(m_yaw);
 368                         }
 369                 }
 370         }
 371
 372         m_oldpos = m_base_position;
 373
 374         /*
 375                 Move it, with collision detection
 376         */
 377
 378         core::aabbox3d<f32> box(-BS/3.,0.0,-BS/3., BS/3.,BS*2./3.,BS/3.);
 379         collisionMoveResult moveresult;
 380         // Maximum movement without glitches
 381         f32 pos_max_d = BS*0.25;
 382         // Limit speed
 383         if(m_speed_f.getLength()*dtime > pos_max_d)
 384                 m_speed_f *= pos_max_d / (m_speed_f.getLength()*dtime);
 385         v3f pos_f = getBasePosition();
 386         v3f pos_f_old = pos_f;
 387         moveresult = collisionMoveSimple(&m_env->getMap(), pos_max_d,
 388                         box, dtime, pos_f, m_speed_f);
 389         m_touching_ground = moveresult.touching_ground;
 390
 391         setBasePosition(pos_f);
 392
 393         if(send_recommended == false)
 394                 return;
 395
 396         if(pos_f.getDistanceFrom(m_last_sent_position) > 0.05*BS)
 397         {
 398                 m_last_sent_position = pos_f;
 399
 400                 std::ostringstream os(std::ios::binary);
 401                 // command (0 = update position)
 402                 writeU8(os, 0);
 403                 // pos
 404                 writeV3F1000(os, m_base_position);
 405                 // yaw
 406                 writeF1000(os, m_yaw);
 407                 // create message and add to list
 408                 ActiveObjectMessage aom(getId(), false, os.str());
 409                 messages.push_back(aom);
 410         }
 411 }
 412
 413 std::string RatSAO::getClientInitializationData()
 414 {
 415         std::ostringstream os(std::ios::binary);
 416         // version
 417         writeU8(os, 0);
 418         // pos
 419         writeV3F1000(os, m_base_position);
 420         return os.str();
 421 }
 422
 423 std::string RatSAO::getStaticData()
 424 {
 425         dstream<<__FUNCTION_NAME<<std::endl;
 426         std::ostringstream os(std::ios::binary);
 427         // version
 428         writeU8(os, 0);
 429         return os.str();
 430 }
 431
 432 InventoryItem* RatSAO::createPickedUpItem()
 433 {
 434         std::istringstream is("CraftItem rat 1", std::ios_base::binary);
 435         InventoryItem *item = InventoryItem::deSerialize(is);
 436         return item;
 437 }
 438
 439