sv_user.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // sv_user.c -- server code for moving users
  21
  22 #include "quakedef.h"
  23
  24 edict_t *sv_player;
  25
  26 cvar_t  sv_edgefriction = {0, "edgefriction", "2"};
  27 cvar_t  sv_predict = {0, "sv_predict", "1"};
  28 cvar_t  sv_deltacompress = {0, "sv_deltacompress", "1"};
  29 cvar_t  sv_idealpitchscale = {0, "sv_idealpitchscale","0.8"};
  30 cvar_t  sv_maxspeed = {CVAR_NOTIFY, "sv_maxspeed", "320"};
  31 cvar_t  sv_accelerate = {0, "sv_accelerate", "10"};
  32
  33 static  vec3_t          forward, right, up;
  34
  35 vec3_t  wishdir;
  36 float   wishspeed;
  37
  38 // world
  39 float   *angles;
  40 float   *origin;
  41 float   *velocity;
  42
  43 qboolean        onground;
  44
  45 usercmd_t       cmd;
  46
  47
  48 /*
  49 ===============
  50 SV_SetIdealPitch
  51 ===============
  52 */
  53 #define MAX_FORWARD     6
  54 void SV_SetIdealPitch (void)
  55 {
  56         float   angleval, sinval, cosval;
  57         trace_t tr;
  58         vec3_t  top, bottom;
  59         float   z[MAX_FORWARD];
  60         int             i, j;
  61         int             step, dir, steps;
  62
  63         if (!((int)sv_player->v.flags & FL_ONGROUND))
  64                 return;
  65
  66         angleval = sv_player->v.angles[YAW] * M_PI*2 / 360;
  67         sinval = sin(angleval);
  68         cosval = cos(angleval);
  69
  70         for (i=0 ; i<MAX_FORWARD ; i++)
  71         {
  72                 top[0] = sv_player->v.origin[0] + cosval*(i+3)*12;
  73                 top[1] = sv_player->v.origin[1] + sinval*(i+3)*12;
  74                 top[2] = sv_player->v.origin[2] + sv_player->v.view_ofs[2];
  75
  76                 bottom[0] = top[0];
  77                 bottom[1] = top[1];
  78                 bottom[2] = top[2] - 160;
  79
  80                 tr = SV_Move (top, vec3_origin, vec3_origin, bottom, MOVE_NOMONSTERS, sv_player);
  81                 if (tr.allsolid)
  82                         return; // looking at a wall, leave ideal the way is was
  83
  84                 if (tr.fraction == 1)
  85                         return; // near a dropoff
  86
  87                 z[i] = top[2] + tr.fraction*(bottom[2]-top[2]);
  88         }
  89
  90         dir = 0;
  91         steps = 0;
  92         for (j=1 ; j<i ; j++)
  93         {
  94                 step = z[j] - z[j-1];
  95                 if (step > -ON_EPSILON && step < ON_EPSILON)
  96                         continue;
  97
  98                 if (dir && ( step-dir > ON_EPSILON || step-dir < -ON_EPSILON ) )
  99                         return;         // mixed changes
 100
 101                 steps++;
 102                 dir = step;
 103         }
 104
 105         if (!dir)
 106         {
 107                 sv_player->v.idealpitch = 0;
 108                 return;
 109         }
 110
 111         if (steps < 2)
 112                 return;
 113         sv_player->v.idealpitch = -dir * sv_idealpitchscale.value;
 114 }
 115
 116
 117 /*
 118 ==================
 119 SV_UserFriction
 120
 121 ==================
 122 */
 123 void SV_UserFriction (void)
 124 {
 125         float   *vel;
 126         float   speed, newspeed, control;
 127         vec3_t  start, stop;
 128         float   friction;
 129         trace_t trace;
 130
 131         vel = velocity;
 132
 133         speed = sqrt(vel[0]*vel[0] +vel[1]*vel[1]);
 134         if (!speed)
 135                 return;
 136
 137 // if the leading edge is over a dropoff, increase friction
 138         start[0] = stop[0] = origin[0] + vel[0]/speed*16;
 139         start[1] = stop[1] = origin[1] + vel[1]/speed*16;
 140         start[2] = origin[2] + sv_player->v.mins[2];
 141         stop[2] = start[2] - 34;
 142
 143         trace = SV_Move (start, vec3_origin, vec3_origin, stop, MOVE_NOMONSTERS, sv_player);
 144
 145         if (trace.fraction == 1.0)
 146                 friction = sv_friction.value*sv_edgefriction.value;
 147         else
 148                 friction = sv_friction.value;
 149
 150 // apply friction
 151         control = speed < sv_stopspeed.value ? sv_stopspeed.value : speed;
 152         newspeed = speed - sv.frametime*control*friction;
 153
 154         if (newspeed < 0)
 155                 newspeed = 0;
 156         else
 157                 newspeed /= speed;
 158
 159         vel[0] = vel[0] * newspeed;
 160         vel[1] = vel[1] * newspeed;
 161         vel[2] = vel[2] * newspeed;
 162 }
 163
 164 /*
 165 ==============
 166 SV_Accelerate
 167 ==============
 168 */
 169 void SV_Accelerate (void)
 170 {
 171         int                     i;
 172         float           addspeed, accelspeed, currentspeed;
 173
 174         currentspeed = DotProduct (velocity, wishdir);
 175         addspeed = wishspeed - currentspeed;
 176         if (addspeed <= 0)
 177                 return;
 178         accelspeed = sv_accelerate.value*sv.frametime*wishspeed;
 179         if (accelspeed > addspeed)
 180                 accelspeed = addspeed;
 181
 182         for (i=0 ; i<3 ; i++)
 183                 velocity[i] += accelspeed*wishdir[i];
 184 }
 185
 186 void SV_AirAccelerate (vec3_t wishveloc)
 187 {
 188         int                     i;
 189         float           addspeed, wishspd, accelspeed, currentspeed;
 190
 191         wishspd = VectorNormalizeLength (wishveloc);
 192         if (wishspd > 30)
 193                 wishspd = 30;
 194         currentspeed = DotProduct (velocity, wishveloc);
 195         addspeed = wishspd - currentspeed;
 196         if (addspeed <= 0)
 197                 return;
 198         accelspeed = sv_accelerate.value*wishspeed * sv.frametime;
 199         if (accelspeed > addspeed)
 200                 accelspeed = addspeed;
 201
 202         for (i=0 ; i<3 ; i++)
 203                 velocity[i] += accelspeed*wishveloc[i];
 204 }
 205
 206
 207 void DropPunchAngle (void)
 208 {
 209         float   len;
 210         eval_t  *val;
 211
 212         len = VectorNormalizeLength (sv_player->v.punchangle);
 213
 214         len -= 10*sv.frametime;
 215         if (len < 0)
 216                 len = 0;
 217         VectorScale (sv_player->v.punchangle, len, sv_player->v.punchangle);
 218
 219         if ((val = GETEDICTFIELDVALUE(sv_player, eval_punchvector)))
 220         {
 221                 len = VectorNormalizeLength (val->vector);
 222
 223                 len -= 20*sv.frametime;
 224                 if (len < 0)
 225                         len = 0;
 226                 VectorScale (val->vector, len, val->vector);
 227         }
 228 }
 229
 230 /*
 231 ===================
 232 SV_WaterMove
 233
 234 ===================
 235 */
 236 void SV_WaterMove (void)
 237 {
 238         int             i;
 239         vec3_t  wishvel;
 240         float   speed, newspeed, wishspeed, addspeed, accelspeed, temp;
 241
 242 //
 243 // user intentions
 244 //
 245         AngleVectors (sv_player->v.v_angle, forward, right, up);
 246
 247         for (i=0 ; i<3 ; i++)
 248                 wishvel[i] = forward[i]*cmd.forwardmove + right[i]*cmd.sidemove;
 249
 250         if (!cmd.forwardmove && !cmd.sidemove && !cmd.upmove)
 251                 wishvel[2] -= 60;               // drift towards bottom
 252         else
 253                 wishvel[2] += cmd.upmove;
 254
 255         wishspeed = VectorLength(wishvel);
 256         if (wishspeed > sv_maxspeed.value)
 257         {
 258                 temp = sv_maxspeed.value/wishspeed;
 259                 VectorScale (wishvel, temp, wishvel);
 260                 wishspeed = sv_maxspeed.value;
 261         }
 262         wishspeed *= 0.7;
 263
 264 //
 265 // water friction
 266 //
 267         speed = VectorLength (velocity);
 268         if (speed)
 269         {
 270                 newspeed = speed - sv.frametime * speed * sv_friction.value;
 271                 if (newspeed < 0)
 272                         newspeed = 0;
 273                 temp = newspeed/speed;
 274                 VectorScale (velocity, temp, velocity);
 275         }
 276         else
 277                 newspeed = 0;
 278
 279 //
 280 // water acceleration
 281 //
 282         if (!wishspeed)
 283                 return;
 284
 285         addspeed = wishspeed - newspeed;
 286         if (addspeed <= 0)
 287                 return;
 288
 289         VectorNormalize (wishvel);
 290         accelspeed = sv_accelerate.value * wishspeed * sv.frametime;
 291         if (accelspeed > addspeed)
 292                 accelspeed = addspeed;
 293
 294         for (i=0 ; i<3 ; i++)
 295                 velocity[i] += accelspeed * wishvel[i];
 296 }
 297
 298 void SV_WaterJump (void)
 299 {
 300         if (sv.time > sv_player->v.teleport_time
 301         || !sv_player->v.waterlevel)
 302         {
 303                 sv_player->v.flags = (int)sv_player->v.flags & ~FL_WATERJUMP;
 304                 sv_player->v.teleport_time = 0;
 305         }
 306         sv_player->v.velocity[0] = sv_player->v.movedir[0];
 307         sv_player->v.velocity[1] = sv_player->v.movedir[1];
 308 }
 309
 310
 311 /*
 312 ===================
 313 SV_AirMove
 314
 315 ===================
 316 */
 317 void SV_AirMove (void)
 318 {
 319         int                     i;
 320         vec3_t          wishvel;
 321         float           fmove, smove, temp;
 322
 323         // LordHavoc: correct quake movement speed bug when looking up/down
 324         wishvel[0] = wishvel[2] = 0;
 325         wishvel[1] = sv_player->v.angles[1];
 326         AngleVectors (wishvel, forward, right, up);
 327
 328         fmove = cmd.forwardmove;
 329         smove = cmd.sidemove;
 330
 331 // hack to not let you back into teleporter
 332         if (sv.time < sv_player->v.teleport_time && fmove < 0)
 333                 fmove = 0;
 334
 335         for (i=0 ; i<3 ; i++)
 336                 wishvel[i] = forward[i]*fmove + right[i]*smove;
 337
 338         if ( (int)sv_player->v.movetype != MOVETYPE_WALK)
 339                 wishvel[2] = cmd.upmove;
 340         else
 341                 wishvel[2] = 0;
 342
 343         VectorCopy (wishvel, wishdir);
 344         wishspeed = VectorNormalizeLength(wishdir);
 345         if (wishspeed > sv_maxspeed.value)
 346         {
 347                 temp = sv_maxspeed.value/wishspeed;
 348                 VectorScale (wishvel, temp, wishvel);
 349                 wishspeed = sv_maxspeed.value;
 350         }
 351
 352         if ( sv_player->v.movetype == MOVETYPE_NOCLIP)
 353         {       // noclip
 354                 VectorCopy (wishvel, velocity);
 355         }
 356         else if ( onground )
 357         {
 358                 SV_UserFriction ();
 359                 SV_Accelerate ();
 360         }
 361         else
 362         {       // not on ground, so little effect on velocity
 363                 SV_AirAccelerate (wishvel);
 364         }
 365 }
 366
 367 /*
 368 ===================
 369 SV_ClientThink
 370
 371 the move fields specify an intended velocity in pix/sec
 372 the angle fields specify an exact angular motion in degrees
 373 ===================
 374 */
 375 void SV_ClientThink (void)
 376 {
 377         vec3_t          v_angle;
 378
 379         if (sv_player->v.movetype == MOVETYPE_NONE)
 380                 return;
 381
 382         onground = (int)sv_player->v.flags & FL_ONGROUND;
 383
 384         origin = sv_player->v.origin;
 385         velocity = sv_player->v.velocity;
 386
 387         DropPunchAngle ();
 388
 389 //
 390 // if dead, behave differently
 391 //
 392         if (sv_player->v.health <= 0)
 393                 return;
 394
 395 //
 396 // angles
 397 // show 1/3 the pitch angle and all the roll angle
 398         cmd = host_client->cmd;
 399         angles = sv_player->v.angles;
 400
 401         VectorAdd (sv_player->v.v_angle, sv_player->v.punchangle, v_angle);
 402         angles[ROLL] = V_CalcRoll (sv_player->v.angles, sv_player->v.velocity)*4;
 403         if (!sv_player->v.fixangle)
 404         {
 405                 // LordHavoc: pitch was ugly to begin with...  removed except in water
 406                 if (sv_player->v.waterlevel >= 2)
 407                         angles[PITCH] = -v_angle[PITCH]/3;
 408                 else
 409                         angles[PITCH] = 0;
 410                 angles[YAW] = v_angle[YAW];
 411         }
 412
 413         if ( (int)sv_player->v.flags & FL_WATERJUMP )
 414         {
 415                 SV_WaterJump ();
 416                 return;
 417         }
 418 //
 419 // walk
 420 //
 421         if ( (sv_player->v.waterlevel >= 2)     && (sv_player->v.movetype != MOVETYPE_NOCLIP) )
 422         {
 423                 SV_WaterMove ();
 424                 return;
 425         }
 426
 427         SV_AirMove ();
 428 }
 429
 430
 431 /*
 432 ===================
 433 SV_ReadClientMove
 434 ===================
 435 */
 436 void SV_ReadClientMove (usercmd_t *move)
 437 {
 438         int             i;
 439         vec3_t  angle;
 440         int             bits;
 441         eval_t  *val;
 442         float   total;
 443
 444 // read ping time
 445         host_client->ping_times[host_client->num_pings % NUM_PING_TIMES] = sv.time - MSG_ReadFloat ();
 446         host_client->num_pings++;
 447         for (i=0, total = 0;i < NUM_PING_TIMES;i++)
 448                 total += host_client->ping_times[i];
 449         host_client->ping = total / NUM_PING_TIMES; // can be used for prediction
 450         host_client->latency = 0;
 451         if (sv_predict.integer && (svs.maxclients > 1) && (!sv.paused)) // if paused or a local game, don't predict
 452                 host_client->latency = host_client->ping;
 453         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_ping)))
 454                 val->_float = host_client->ping * 1000.0;
 455
 456 // read current angles
 457         // dpprotocol version 2
 458         for (i = 0;i < 3;i++)
 459                 angle[i] = MSG_ReadFloat ();
 460
 461         VectorCopy (angle, host_client->edict->v.v_angle);
 462
 463 // read movement
 464         move->forwardmove = MSG_ReadShort ();
 465         move->sidemove = MSG_ReadShort ();
 466         move->upmove = MSG_ReadShort ();
 467         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_movement)))
 468         {
 469                 val->vector[0] = move->forwardmove;
 470                 val->vector[1] = move->sidemove;
 471                 val->vector[2] = move->upmove;
 472         }
 473
 474 // read buttons
 475         bits = MSG_ReadByte ();
 476         host_client->edict->v.button0 = bits & 1;
 477         host_client->edict->v.button2 = (bits & 2)>>1;
 478         // LordHavoc: added 6 new buttons
 479         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button3))) val->_float = ((bits >> 2) & 1);
 480         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button4))) val->_float = ((bits >> 3) & 1);
 481         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button5))) val->_float = ((bits >> 4) & 1);
 482         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button6))) val->_float = ((bits >> 5) & 1);
 483         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button7))) val->_float = ((bits >> 6) & 1);
 484         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button8))) val->_float = ((bits >> 7) & 1);
 485
 486         i = MSG_ReadByte ();
 487         if (i)
 488                 host_client->edict->v.impulse = i;
 489 }
 490
 491 /*
 492 ===================
 493 SV_ReadClientMessage
 494
 495 Returns false if the client should be killed
 496 ===================
 497 */
 498 void SV_SendServerinfo (client_t *client);
 499 qboolean SV_ReadClientMessage (void)
 500 {
 501         int             ret;
 502         int             cmd;
 503         char            *s;
 504
 505         do
 506         {
 507 nextmsg:
 508                 ret = NET_GetMessage (host_client->netconnection);
 509                 if (ret == -1)
 510                 {
 511                         Sys_Printf ("SV_ReadClientMessage: NET_GetMessage failed\n");
 512                         return false;
 513                 }
 514                 if (!ret)
 515                         return true;
 516
 517                 MSG_BeginReading ();
 518
 519                 while (1)
 520                 {
 521                         if (!host_client->active)
 522                                 return false;   // a command caused an error
 523
 524                         if (msg_badread)
 525                         {
 526                                 Sys_Printf ("SV_ReadClientMessage: badread\n");
 527                                 return false;
 528                         }
 529
 530                         cmd = MSG_ReadChar ();
 531
 532 #ifndef NOROUTINGFIX
 533                         if (cmd != -1 && host_client->waitingforconnect)
 534                         {
 535                                 host_client->waitingforconnect = false;
 536                                 host_client->sendserverinfo = true;
 537                         }
 538 #endif
 539
 540                         switch (cmd)
 541                         {
 542                         case -1:
 543                                 goto nextmsg;           // end of message
 544
 545                         default:
 546                                 Sys_Printf ("SV_ReadClientMessage: unknown command char %i\n", cmd);
 547                                 return false;
 548
 549                         case clc_nop:
 550                                 break;
 551
 552                         case clc_stringcmd:
 553                                 s = MSG_ReadString ();
 554                                 ret = 0;
 555                                 if (Q_strncasecmp(s, "status", 6) == 0
 556                                  || Q_strncasecmp(s, "name", 4) == 0
 557                                  || Q_strncasecmp(s, "say", 3) == 0
 558                                  || Q_strncasecmp(s, "say_team", 8) == 0
 559                                  || Q_strncasecmp(s, "tell", 4) == 0
 560                                  || Q_strncasecmp(s, "color", 5) == 0
 561                                  || Q_strncasecmp(s, "kill", 4) == 0
 562                                  || Q_strncasecmp(s, "pause", 5) == 0
 563                                  || Q_strncasecmp(s, "spawn", 5) == 0
 564                                  || Q_strncasecmp(s, "begin", 5) == 0
 565                                  || Q_strncasecmp(s, "prespawn", 8) == 0
 566                                  || Q_strncasecmp(s, "kick", 4) == 0
 567                                  || Q_strncasecmp(s, "ping", 4) == 0
 568                                  || Q_strncasecmp(s, "ban", 3) == 0
 569                                  || Q_strncasecmp(s, "pmodel", 6) == 0
 570                                  || (gamemode == GAME_NEHAHRA && (Q_strncasecmp(s, "max", 3) == 0 || Q_strncasecmp(s, "monster", 7) == 0 || Q_strncasecmp(s, "scrag", 5) == 0 || Q_strncasecmp(s, "gimme", 5) == 0 || Q_strncasecmp(s, "wraith", 6) == 0))
 571                                  || (gamemode != GAME_NEHAHRA && (Q_strncasecmp(s, "god", 3) == 0 || Q_strncasecmp(s, "notarget", 8) == 0 || Q_strncasecmp(s, "fly", 3) == 0 || Q_strncasecmp(s, "give", 4) == 0 || Q_strncasecmp(s, "noclip", 6) == 0)))
 572                                 {
 573                                         ret = 1;
 574                                         Cmd_ExecuteString (s, src_client);
 575                                 }
 576                                 else
 577                                         Con_DPrintf("%s tried to %s\n", host_client->name, s);
 578                                 break;
 579
 580                         case clc_disconnect:
 581                                 return false;
 582
 583                         case clc_move:
 584                                 SV_ReadClientMove (&host_client->cmd);
 585                                 break;
 586
 587                         case clc_ackentities:
 588                                 EntityFrame_AckFrame(&host_client->entitydatabase, MSG_ReadLong());
 589                                 break;
 590                         }
 591                 }
 592         } while (ret == 1);
 593
 594         return true;
 595 }
 596
 597
 598 /*
 599 ==================
 600 SV_RunClients
 601 ==================
 602 */
 603 void SV_RunClients (void)
 604 {
 605         int                             i;
 606
 607         for (i=0, host_client = svs.clients ; i<svs.maxclients ; i++, host_client++)
 608         {
 609                 if (!host_client->active)
 610                         continue;
 611
 612                 sv_player = host_client->edict;
 613
 614                 if (!SV_ReadClientMessage ())
 615                 {
 616                         SV_DropClient (false);  // client misbehaved...
 617                         continue;
 618                 }
 619
 620                 if (!host_client->spawned)
 621                 {
 622                 // clear client movement until a new packet is received
 623                         memset (&host_client->cmd, 0, sizeof(host_client->cmd));
 624                         continue;
 625                 }
 626
 627 // always pause in single player if in console or menus
 628                 if (!sv.paused && (svs.maxclients > 1 || key_dest == key_game) )
 629                 {
 630                         // LordHavoc: QuakeC replacement for SV_ClientThink (player movement)
 631                         if (SV_PlayerPhysicsQC)
 632                         {
 633                                 pr_global_struct->time = sv.time;
 634                                 pr_global_struct->self = EDICT_TO_PROG(sv_player);
 635                                 PR_ExecuteProgram ((func_t)(SV_PlayerPhysicsQC - pr_functions), "");
 636                         }
 637                         else
 638                                 SV_ClientThink ();
 639                 }
 640         }
 641 }
 642