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 = {"edgefriction", "2"};
  27 cvar_t  sv_predict = {"sv_predict", "1"};
  28 cvar_t  sv_deltacompress = {"sv_deltacompress", "1"};
  29
  30 static  vec3_t          forward, right, up;
  31
  32 vec3_t  wishdir;
  33 float   wishspeed;
  34
  35 // world
  36 float   *angles;
  37 float   *origin;
  38 float   *velocity;
  39
  40 qboolean        onground;
  41
  42 usercmd_t       cmd;
  43
  44 cvar_t  sv_idealpitchscale = {"sv_idealpitchscale","0.8"};
  45
  46
  47 /*
  48 ===============
  49 SV_SetIdealPitch
  50 ===============
  51 */
  52 #define MAX_FORWARD     6
  53 void SV_SetIdealPitch (void)
  54 {
  55         float   angleval, sinval, cosval;
  56         trace_t tr;
  57         vec3_t  top, bottom;
  58         float   z[MAX_FORWARD];
  59         int             i, j;
  60         int             step, dir, steps;
  61
  62         if (!((int)sv_player->v.flags & FL_ONGROUND))
  63                 return;
  64
  65         angleval = sv_player->v.angles[YAW] * M_PI*2 / 360;
  66         sinval = sin(angleval);
  67         cosval = cos(angleval);
  68
  69         for (i=0 ; i<MAX_FORWARD ; i++)
  70         {
  71                 top[0] = sv_player->v.origin[0] + cosval*(i+3)*12;
  72                 top[1] = sv_player->v.origin[1] + sinval*(i+3)*12;
  73                 top[2] = sv_player->v.origin[2] + sv_player->v.view_ofs[2];
  74
  75                 bottom[0] = top[0];
  76                 bottom[1] = top[1];
  77                 bottom[2] = top[2] - 160;
  78
  79                 tr = SV_Move (top, vec3_origin, vec3_origin, bottom, 1, sv_player);
  80                 if (tr.allsolid)
  81                         return; // looking at a wall, leave ideal the way is was
  82
  83                 if (tr.fraction == 1)
  84                         return; // near a dropoff
  85
  86                 z[i] = top[2] + tr.fraction*(bottom[2]-top[2]);
  87         }
  88
  89         dir = 0;
  90         steps = 0;
  91         for (j=1 ; j<i ; j++)
  92         {
  93                 step = z[j] - z[j-1];
  94                 if (step > -ON_EPSILON && step < ON_EPSILON)
  95                         continue;
  96
  97                 if (dir && ( step-dir > ON_EPSILON || step-dir < -ON_EPSILON ) )
  98                         return;         // mixed changes
  99
 100                 steps++;
 101                 dir = step;
 102         }
 103
 104         if (!dir)
 105         {
 106                 sv_player->v.idealpitch = 0;
 107                 return;
 108         }
 109
 110         if (steps < 2)
 111                 return;
 112         sv_player->v.idealpitch = -dir * sv_idealpitchscale.value;
 113 }
 114
 115
 116 /*
 117 ==================
 118 SV_UserFriction
 119
 120 ==================
 121 */
 122 void SV_UserFriction (void)
 123 {
 124         float   *vel;
 125         float   speed, newspeed, control;
 126         vec3_t  start, stop;
 127         float   friction;
 128         trace_t trace;
 129
 130         vel = velocity;
 131
 132         speed = sqrt(vel[0]*vel[0] +vel[1]*vel[1]);
 133         if (!speed)
 134                 return;
 135
 136 // if the leading edge is over a dropoff, increase friction
 137         start[0] = stop[0] = origin[0] + vel[0]/speed*16;
 138         start[1] = stop[1] = origin[1] + vel[1]/speed*16;
 139         start[2] = origin[2] + sv_player->v.mins[2];
 140         stop[2] = start[2] - 34;
 141
 142         trace = SV_Move (start, vec3_origin, vec3_origin, stop, true, sv_player);
 143
 144         if (trace.fraction == 1.0)
 145                 friction = sv_friction.value*sv_edgefriction.value;
 146         else
 147                 friction = sv_friction.value;
 148
 149 // apply friction
 150         control = speed < sv_stopspeed.value ? sv_stopspeed.value : speed;
 151         newspeed = speed - sv.frametime*control*friction;
 152
 153         if (newspeed < 0)
 154                 newspeed = 0;
 155         else
 156                 newspeed /= speed;
 157
 158         vel[0] = vel[0] * newspeed;
 159         vel[1] = vel[1] * newspeed;
 160         vel[2] = vel[2] * newspeed;
 161 }
 162
 163 /*
 164 ==============
 165 SV_Accelerate
 166 ==============
 167 */
 168 cvar_t  sv_maxspeed = {"sv_maxspeed", "320", false, true};
 169 cvar_t  sv_accelerate = {"sv_accelerate", "10"};
 170 #if 0
 171 void SV_Accelerate (vec3_t wishvel)
 172 {
 173         int                     i;
 174         float           addspeed, accelspeed;
 175         vec3_t          pushvec;
 176
 177         if (wishspeed == 0)
 178                 return;
 179
 180         VectorSubtract (wishvel, velocity, pushvec);
 181         addspeed = VectorNormalize (pushvec);
 182
 183         accelspeed = sv_accelerate.value*sv.frametime*addspeed;
 184         if (accelspeed > addspeed)
 185                 accelspeed = addspeed;
 186
 187         for (i=0 ; i<3 ; i++)
 188                 velocity[i] += accelspeed*pushvec[i];
 189 }
 190 #endif
 191 void SV_Accelerate (void)
 192 {
 193         int                     i;
 194         float           addspeed, accelspeed, currentspeed;
 195
 196         currentspeed = DotProduct (velocity, wishdir);
 197         addspeed = wishspeed - currentspeed;
 198         if (addspeed <= 0)
 199                 return;
 200         accelspeed = sv_accelerate.value*sv.frametime*wishspeed;
 201         if (accelspeed > addspeed)
 202                 accelspeed = addspeed;
 203
 204         for (i=0 ; i<3 ; i++)
 205                 velocity[i] += accelspeed*wishdir[i];
 206 }
 207
 208 void SV_AirAccelerate (vec3_t wishveloc)
 209 {
 210         int                     i;
 211         float           addspeed, wishspd, accelspeed, currentspeed;
 212
 213         wishspd = VectorNormalizeLength (wishveloc);
 214         if (wishspd > 30)
 215                 wishspd = 30;
 216         currentspeed = DotProduct (velocity, wishveloc);
 217         addspeed = wishspd - currentspeed;
 218         if (addspeed <= 0)
 219                 return;
 220 //      accelspeed = sv_accelerate.value * sv.frametime;
 221         accelspeed = sv_accelerate.value*wishspeed * sv.frametime;
 222         if (accelspeed > addspeed)
 223                 accelspeed = addspeed;
 224
 225         for (i=0 ; i<3 ; i++)
 226                 velocity[i] += accelspeed*wishveloc[i];
 227 }
 228
 229
 230 void DropPunchAngle (void)
 231 {
 232         float   len;
 233         eval_t  *val;
 234
 235         len = VectorNormalizeLength (sv_player->v.punchangle);
 236
 237         len -= 10*sv.frametime;
 238         if (len < 0)
 239                 len = 0;
 240         VectorScale (sv_player->v.punchangle, len, sv_player->v.punchangle);
 241
 242         if ((val = GETEDICTFIELDVALUE(sv_player, eval_punchvector)))
 243         {
 244                 len = VectorNormalizeLength (val->vector);
 245
 246                 len -= 20*sv.frametime;
 247                 if (len < 0)
 248                         len = 0;
 249                 VectorScale (val->vector, len, val->vector);
 250         }
 251 }
 252
 253 /*
 254 ===================
 255 SV_WaterMove
 256
 257 ===================
 258 */
 259 void SV_WaterMove (void)
 260 {
 261         int             i;
 262         vec3_t  wishvel;
 263         float   speed, newspeed, wishspeed, addspeed, accelspeed;
 264
 265 //
 266 // user intentions
 267 //
 268         AngleVectors (sv_player->v.v_angle, forward, right, up);
 269
 270         for (i=0 ; i<3 ; i++)
 271                 wishvel[i] = forward[i]*cmd.forwardmove + right[i]*cmd.sidemove;
 272
 273         if (!cmd.forwardmove && !cmd.sidemove && !cmd.upmove)
 274                 wishvel[2] -= 60;               // drift towards bottom
 275         else
 276                 wishvel[2] += cmd.upmove;
 277
 278         wishspeed = Length(wishvel);
 279         if (wishspeed > sv_maxspeed.value)
 280         {
 281                 VectorScale (wishvel, sv_maxspeed.value/wishspeed, wishvel);
 282                 wishspeed = sv_maxspeed.value;
 283         }
 284         wishspeed *= 0.7;
 285
 286 //
 287 // water friction
 288 //
 289         speed = Length (velocity);
 290         if (speed)
 291         {
 292                 newspeed = speed - sv.frametime * speed * sv_friction.value;
 293                 if (newspeed < 0)
 294                         newspeed = 0;
 295                 VectorScale (velocity, newspeed/speed, velocity);
 296         }
 297         else
 298                 newspeed = 0;
 299
 300 //
 301 // water acceleration
 302 //
 303         if (!wishspeed)
 304                 return;
 305
 306         addspeed = wishspeed - newspeed;
 307         if (addspeed <= 0)
 308                 return;
 309
 310         VectorNormalize (wishvel);
 311         accelspeed = sv_accelerate.value * wishspeed * sv.frametime;
 312         if (accelspeed > addspeed)
 313                 accelspeed = addspeed;
 314
 315         for (i=0 ; i<3 ; i++)
 316                 velocity[i] += accelspeed * wishvel[i];
 317 }
 318
 319 void SV_WaterJump (void)
 320 {
 321         if (sv.time > sv_player->v.teleport_time
 322         || !sv_player->v.waterlevel)
 323         {
 324                 sv_player->v.flags = (int)sv_player->v.flags & ~FL_WATERJUMP;
 325                 sv_player->v.teleport_time = 0;
 326         }
 327         sv_player->v.velocity[0] = sv_player->v.movedir[0];
 328         sv_player->v.velocity[1] = sv_player->v.movedir[1];
 329 }
 330
 331
 332 /*
 333 ===================
 334 SV_AirMove
 335
 336 ===================
 337 */
 338 void SV_AirMove (void)
 339 {
 340         int                     i;
 341         vec3_t          wishvel;
 342         float           fmove, smove;
 343
 344         // LordHavoc: correct quake movement speed bug when looking up/down
 345         wishvel[0] = wishvel[2] = 0;
 346         wishvel[1] = sv_player->v.angles[1];
 347         AngleVectors (wishvel, forward, right, up);
 348 //      AngleVectors (sv_player->v.angles, forward, right, up);
 349
 350         fmove = cmd.forwardmove;
 351         smove = cmd.sidemove;
 352
 353 // hack to not let you back into teleporter
 354         if (sv.time < sv_player->v.teleport_time && fmove < 0)
 355                 fmove = 0;
 356
 357         for (i=0 ; i<3 ; i++)
 358                 wishvel[i] = forward[i]*fmove + right[i]*smove;
 359
 360         if ( (int)sv_player->v.movetype != MOVETYPE_WALK)
 361                 wishvel[2] = cmd.upmove;
 362         else
 363                 wishvel[2] = 0;
 364
 365         VectorCopy (wishvel, wishdir);
 366         wishspeed = VectorNormalizeLength(wishdir);
 367         if (wishspeed > sv_maxspeed.value)
 368         {
 369                 VectorScale (wishvel, sv_maxspeed.value/wishspeed, wishvel);
 370                 wishspeed = sv_maxspeed.value;
 371         }
 372
 373         if ( sv_player->v.movetype == MOVETYPE_NOCLIP)
 374         {       // noclip
 375                 VectorCopy (wishvel, velocity);
 376         }
 377         else if ( onground )
 378         {
 379                 SV_UserFriction ();
 380                 SV_Accelerate ();
 381         }
 382         else
 383         {       // not on ground, so little effect on velocity
 384                 SV_AirAccelerate (wishvel);
 385         }
 386 }
 387
 388 /*
 389 ===================
 390 SV_ClientThink
 391
 392 the move fields specify an intended velocity in pix/sec
 393 the angle fields specify an exact angular motion in degrees
 394 ===================
 395 */
 396 void SV_ClientThink (void)
 397 {
 398         vec3_t          v_angle;
 399
 400         if (sv_player->v.movetype == MOVETYPE_NONE)
 401                 return;
 402
 403         onground = (int)sv_player->v.flags & FL_ONGROUND;
 404
 405         origin = sv_player->v.origin;
 406         velocity = sv_player->v.velocity;
 407
 408         DropPunchAngle ();
 409
 410 //
 411 // if dead, behave differently
 412 //
 413         if (sv_player->v.health <= 0)
 414                 return;
 415
 416 //
 417 // angles
 418 // show 1/3 the pitch angle and all the roll angle
 419         cmd = host_client->cmd;
 420         angles = sv_player->v.angles;
 421
 422         VectorAdd (sv_player->v.v_angle, sv_player->v.punchangle, v_angle);
 423         angles[ROLL] = V_CalcRoll (sv_player->v.angles, sv_player->v.velocity)*4;
 424         if (!sv_player->v.fixangle)
 425         {
 426                 // LordHavoc: pitch was ugly to begin with...  removed except in water
 427                 if (sv_player->v.waterlevel >= 2)
 428                         angles[PITCH] = -v_angle[PITCH]/3;
 429                 else
 430                         angles[PITCH] = 0;
 431                 angles[YAW] = v_angle[YAW];
 432         }
 433
 434         if ( (int)sv_player->v.flags & FL_WATERJUMP )
 435         {
 436                 SV_WaterJump ();
 437                 return;
 438         }
 439 //
 440 // walk
 441 //
 442         if ( (sv_player->v.waterlevel >= 2)     && (sv_player->v.movetype != MOVETYPE_NOCLIP) )
 443         {
 444                 SV_WaterMove ();
 445                 return;
 446         }
 447
 448         SV_AirMove ();
 449 }
 450
 451
 452 /*
 453 ===================
 454 SV_ReadClientMove
 455 ===================
 456 */
 457 void SV_ReadClientMove (usercmd_t *move)
 458 {
 459         int             i;
 460         vec3_t  angle;
 461         int             bits;
 462         eval_t  *val;
 463         float   total;
 464
 465 // read ping time
 466         host_client->ping_times[host_client->num_pings%NUM_PING_TIMES]
 467                 = sv.time - MSG_ReadFloat ();
 468         host_client->num_pings++;
 469         for (i=0, total = 0;i < NUM_PING_TIMES;i++)
 470                 total += host_client->ping_times[i];
 471         host_client->ping = total / NUM_PING_TIMES; // can be used for prediction
 472         host_client->latency = 0;
 473         if (sv_predict.value && (svs.maxclients > 1) && (!sv.paused)) // if paused or a local game, don't predict
 474                 host_client->latency = host_client->ping;
 475         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_ping)))
 476                 val->_float = host_client->ping * 1000.0;
 477
 478 // read current angles
 479         if (dpprotocol)
 480         {
 481                 for (i=0 ; i<3 ; i++)
 482                         angle[i] = MSG_ReadPreciseAngle ();
 483         }
 484         else
 485         {
 486                 for (i=0 ; i<3 ; i++)
 487                         angle[i] = MSG_ReadAngle ();
 488         }
 489
 490         VectorCopy (angle, host_client->edict->v.v_angle);
 491
 492 // read movement
 493         move->forwardmove = MSG_ReadShort ();
 494         move->sidemove = MSG_ReadShort ();
 495         move->upmove = MSG_ReadShort ();
 496         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_movement)))
 497         {
 498                 val->vector[0] = move->forwardmove;
 499                 val->vector[1] = move->sidemove;
 500                 val->vector[2] = move->upmove;
 501         }
 502
 503 // read buttons
 504         bits = MSG_ReadByte ();
 505         host_client->edict->v.button0 = bits & 1;
 506         host_client->edict->v.button2 = (bits & 2)>>1;
 507         // LordHavoc: added 6 new buttons
 508         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button3))) val->_float = ((bits >> 2) & 1);
 509         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button4))) val->_float = ((bits >> 3) & 1);
 510         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button5))) val->_float = ((bits >> 4) & 1);
 511         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button6))) val->_float = ((bits >> 5) & 1);
 512         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button7))) val->_float = ((bits >> 6) & 1);
 513         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button8))) val->_float = ((bits >> 7) & 1);
 514
 515         i = MSG_ReadByte ();
 516         if (i)
 517                 host_client->edict->v.impulse = i;
 518 }
 519
 520 /*
 521 ===================
 522 SV_ReadClientMessage
 523
 524 Returns false if the client should be killed
 525 ===================
 526 */
 527 qboolean SV_ReadClientMessage (void)
 528 {
 529         int             ret;
 530         int             cmd;
 531         char            *s;
 532
 533         do
 534         {
 535 nextmsg:
 536                 ret = NET_GetMessage (host_client->netconnection);
 537                 if (ret == -1)
 538                 {
 539                         Sys_Printf ("SV_ReadClientMessage: NET_GetMessage failed\n");
 540                         return false;
 541                 }
 542                 if (!ret)
 543                         return true;
 544
 545                 MSG_BeginReading ();
 546
 547                 while (1)
 548                 {
 549                         if (!host_client->active)
 550                                 return false;   // a command caused an error
 551
 552                         if (msg_badread)
 553                         {
 554                                 Sys_Printf ("SV_ReadClientMessage: badread\n");
 555                                 return false;
 556                         }
 557
 558                         cmd = MSG_ReadChar ();
 559
 560                         switch (cmd)
 561                         {
 562                         case -1:
 563                                 goto nextmsg;           // end of message
 564
 565                         default:
 566                                 Sys_Printf ("SV_ReadClientMessage: unknown command char\n");
 567                                 return false;
 568
 569                         case clc_nop:
 570 //                              Sys_Printf ("clc_nop\n");
 571                                 break;
 572
 573                         case clc_stringcmd:
 574                                 s = MSG_ReadString ();
 575                                 ret = 0;
 576                                 if (Q_strncasecmp(s, "status", 6) == 0
 577                                  || Q_strncasecmp(s, "name", 4) == 0
 578                                  || Q_strncasecmp(s, "say", 3) == 0
 579                                  || Q_strncasecmp(s, "say_team", 8) == 0
 580                                  || Q_strncasecmp(s, "tell", 4) == 0
 581                                  || Q_strncasecmp(s, "color", 5) == 0
 582                                  || Q_strncasecmp(s, "kill", 4) == 0
 583                                  || Q_strncasecmp(s, "pause", 5) == 0
 584                                  || Q_strncasecmp(s, "spawn", 5) == 0
 585                                  || Q_strncasecmp(s, "begin", 5) == 0
 586                                  || Q_strncasecmp(s, "prespawn", 8) == 0
 587                                  || Q_strncasecmp(s, "kick", 4) == 0
 588                                  || Q_strncasecmp(s, "ping", 4) == 0
 589                                  || Q_strncasecmp(s, "ban", 3) == 0
 590                                  || Q_strncasecmp(s, "pmodel", 6) == 0
 591                                  || (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))
 592                                  || (!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)))
 593                                 {
 594                                         ret = 1;
 595                                         Cmd_ExecuteString (s, src_client);
 596                                 }
 597                                 else
 598                                         Con_DPrintf("%s tried to %s\n", host_client->name, s);
 599                                 /*
 600                                 if (ret == 2)
 601                                         Cbuf_InsertText (s);
 602                                 else if (ret == 1)
 603                                         Cmd_ExecuteString (s, src_client);
 604                                 else
 605                                         Con_DPrintf("%s tried to %s\n", host_client->name, s);
 606                                 */
 607                                 break;
 608
 609                         case clc_disconnect:
 610 //                              Sys_Printf ("SV_ReadClientMessage: client disconnected\n");
 611                                 return false;
 612
 613                         case clc_move:
 614                                 SV_ReadClientMove (&host_client->cmd);
 615                                 break;
 616                         }
 617                 }
 618         } while (ret == 1);
 619
 620         return true;
 621 }
 622
 623
 624 /*
 625 ==================
 626 SV_RunClients
 627 ==================
 628 */
 629 void SV_RunClients (void)
 630 {
 631         int                             i;
 632
 633         for (i=0, host_client = svs.clients ; i<svs.maxclients ; i++, host_client++)
 634         {
 635                 if (!host_client->active)
 636                         continue;
 637
 638                 sv_player = host_client->edict;
 639
 640                 if (!SV_ReadClientMessage ())
 641                 {
 642                         SV_DropClient (false);  // client misbehaved...
 643                         continue;
 644                 }
 645
 646                 if (!host_client->spawned)
 647                 {
 648                 // clear client movement until a new packet is received
 649                         memset (&host_client->cmd, 0, sizeof(host_client->cmd));
 650                         continue;
 651                 }
 652
 653 // always pause in single player if in console or menus
 654                 if (!sv.paused && (svs.maxclients > 1 || key_dest == key_game) )
 655                 {
 656                         // LordHavoc: QuakeC replacement for SV_ClientThink (player movement)
 657                         if (SV_PlayerPhysicsQC)
 658                         {
 659                                 pr_global_struct->time = sv.time;
 660                                 pr_global_struct->self = EDICT_TO_PROG(sv_player);
 661                                 PR_ExecuteProgram ((func_t)(SV_PlayerPhysicsQC - pr_functions), "");
 662                         }
 663                         else
 664                                 SV_ClientThink ();
 665                 }
 666         }
 667 }
 668