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 extern  cvar_t  sv_friction;
  27 cvar_t  sv_edgefriction = {"edgefriction", "2"};
  28 cvar_t  sv_predict = {"sv_predict", "1"};
  29 cvar_t  sv_deltacompress = {"sv_deltacompress", "1"};
  30 extern  cvar_t  sv_stopspeed;
  31
  32 static  vec3_t          forward, right, up;
  33
  34 vec3_t  wishdir;
  35 float   wishspeed;
  36
  37 // world
  38 float   *angles;
  39 float   *origin;
  40 float   *velocity;
  41
  42 qboolean        onground;
  43
  44 usercmd_t       cmd;
  45
  46 cvar_t  sv_idealpitchscale = {"sv_idealpitchscale","0.8"};
  47
  48
  49 /*
  50 ===============
  51 SV_SetIdealPitch
  52 ===============
  53 */
  54 #define MAX_FORWARD     6
  55 void SV_SetIdealPitch (void)
  56 {
  57         float   angleval, sinval, cosval;
  58         trace_t tr;
  59         vec3_t  top, bottom;
  60         float   z[MAX_FORWARD];
  61         int             i, j;
  62         int             step, dir, steps;
  63
  64         if (!((int)sv_player->v.flags & FL_ONGROUND))
  65                 return;
  66
  67         angleval = sv_player->v.angles[YAW] * M_PI*2 / 360;
  68         sinval = sin(angleval);
  69         cosval = cos(angleval);
  70
  71         for (i=0 ; i<MAX_FORWARD ; i++)
  72         {
  73                 top[0] = sv_player->v.origin[0] + cosval*(i+3)*12;
  74                 top[1] = sv_player->v.origin[1] + sinval*(i+3)*12;
  75                 top[2] = sv_player->v.origin[2] + sv_player->v.view_ofs[2];
  76
  77                 bottom[0] = top[0];
  78                 bottom[1] = top[1];
  79                 bottom[2] = top[2] - 160;
  80
  81                 tr = SV_Move (top, vec3_origin, vec3_origin, bottom, 1, sv_player);
  82                 if (tr.allsolid)
  83                         return; // looking at a wall, leave ideal the way is was
  84
  85                 if (tr.fraction == 1)
  86                         return; // near a dropoff
  87
  88                 z[i] = top[2] + tr.fraction*(bottom[2]-top[2]);
  89         }
  90
  91         dir = 0;
  92         steps = 0;
  93         for (j=1 ; j<i ; j++)
  94         {
  95                 step = z[j] - z[j-1];
  96                 if (step > -ON_EPSILON && step < ON_EPSILON)
  97                         continue;
  98
  99                 if (dir && ( step-dir > ON_EPSILON || step-dir < -ON_EPSILON ) )
 100                         return;         // mixed changes
 101
 102                 steps++;
 103                 dir = step;
 104         }
 105
 106         if (!dir)
 107         {
 108                 sv_player->v.idealpitch = 0;
 109                 return;
 110         }
 111
 112         if (steps < 2)
 113                 return;
 114         sv_player->v.idealpitch = -dir * sv_idealpitchscale.value;
 115 }
 116
 117
 118 /*
 119 ==================
 120 SV_UserFriction
 121
 122 ==================
 123 */
 124 void SV_UserFriction (void)
 125 {
 126         float   *vel;
 127         float   speed, newspeed, control;
 128         vec3_t  start, stop;
 129         float   friction;
 130         trace_t trace;
 131
 132         vel = velocity;
 133
 134         speed = sqrt(vel[0]*vel[0] +vel[1]*vel[1]);
 135         if (!speed)
 136                 return;
 137
 138 // if the leading edge is over a dropoff, increase friction
 139         start[0] = stop[0] = origin[0] + vel[0]/speed*16;
 140         start[1] = stop[1] = origin[1] + vel[1]/speed*16;
 141         start[2] = origin[2] + sv_player->v.mins[2];
 142         stop[2] = start[2] - 34;
 143
 144         trace = SV_Move (start, vec3_origin, vec3_origin, stop, true, sv_player);
 145
 146         if (trace.fraction == 1.0)
 147                 friction = sv_friction.value*sv_edgefriction.value;
 148         else
 149                 friction = sv_friction.value;
 150
 151 // apply friction
 152         control = speed < sv_stopspeed.value ? sv_stopspeed.value : speed;
 153         newspeed = speed - sv.frametime*control*friction;
 154
 155         if (newspeed < 0)
 156                 newspeed = 0;
 157         else
 158                 newspeed /= speed;
 159
 160         vel[0] = vel[0] * newspeed;
 161         vel[1] = vel[1] * newspeed;
 162         vel[2] = vel[2] * newspeed;
 163 }
 164
 165 /*
 166 ==============
 167 SV_Accelerate
 168 ==============
 169 */
 170 cvar_t  sv_maxspeed = {"sv_maxspeed", "320", false, true};
 171 cvar_t  sv_accelerate = {"sv_accelerate", "10"};
 172 #if 0
 173 void SV_Accelerate (vec3_t wishvel)
 174 {
 175         int                     i;
 176         float           addspeed, accelspeed;
 177         vec3_t          pushvec;
 178
 179         if (wishspeed == 0)
 180                 return;
 181
 182         VectorSubtract (wishvel, velocity, pushvec);
 183         addspeed = VectorNormalize (pushvec);
 184
 185         accelspeed = sv_accelerate.value*sv.frametime*addspeed;
 186         if (accelspeed > addspeed)
 187                 accelspeed = addspeed;
 188
 189         for (i=0 ; i<3 ; i++)
 190                 velocity[i] += accelspeed*pushvec[i];
 191 }
 192 #endif
 193 void SV_Accelerate (void)
 194 {
 195         int                     i;
 196         float           addspeed, accelspeed, currentspeed;
 197
 198         currentspeed = DotProduct (velocity, wishdir);
 199         addspeed = wishspeed - currentspeed;
 200         if (addspeed <= 0)
 201                 return;
 202         accelspeed = sv_accelerate.value*sv.frametime*wishspeed;
 203         if (accelspeed > addspeed)
 204                 accelspeed = addspeed;
 205
 206         for (i=0 ; i<3 ; i++)
 207                 velocity[i] += accelspeed*wishdir[i];
 208 }
 209
 210 void SV_AirAccelerate (vec3_t wishveloc)
 211 {
 212         int                     i;
 213         float           addspeed, wishspd, accelspeed, currentspeed;
 214
 215         wishspd = VectorNormalizeLength (wishveloc);
 216         if (wishspd > 30)
 217                 wishspd = 30;
 218         currentspeed = DotProduct (velocity, wishveloc);
 219         addspeed = wishspd - currentspeed;
 220         if (addspeed <= 0)
 221                 return;
 222 //      accelspeed = sv_accelerate.value * sv.frametime;
 223         accelspeed = sv_accelerate.value*wishspeed * sv.frametime;
 224         if (accelspeed > addspeed)
 225                 accelspeed = addspeed;
 226
 227         for (i=0 ; i<3 ; i++)
 228                 velocity[i] += accelspeed*wishveloc[i];
 229 }
 230
 231
 232 void DropPunchAngle (void)
 233 {
 234         float   len;
 235         eval_t  *val;
 236
 237         len = VectorNormalizeLength (sv_player->v.punchangle);
 238
 239         len -= 10*sv.frametime;
 240         if (len < 0)
 241                 len = 0;
 242         VectorScale (sv_player->v.punchangle, len, sv_player->v.punchangle);
 243
 244         if ((val = GETEDICTFIELDVALUE(sv_player, eval_punchvector)))
 245         {
 246                 len = VectorNormalizeLength (val->vector);
 247
 248                 len -= 20*sv.frametime;
 249                 if (len < 0)
 250                         len = 0;
 251                 VectorScale (val->vector, len, val->vector);
 252         }
 253 }
 254
 255 /*
 256 ===================
 257 SV_WaterMove
 258
 259 ===================
 260 */
 261 void SV_WaterMove (void)
 262 {
 263         int             i;
 264         vec3_t  wishvel;
 265         float   speed, newspeed, wishspeed, addspeed, accelspeed;
 266
 267 //
 268 // user intentions
 269 //
 270         AngleVectors (sv_player->v.v_angle, forward, right, up);
 271
 272         for (i=0 ; i<3 ; i++)
 273                 wishvel[i] = forward[i]*cmd.forwardmove + right[i]*cmd.sidemove;
 274
 275         if (!cmd.forwardmove && !cmd.sidemove && !cmd.upmove)
 276                 wishvel[2] -= 60;               // drift towards bottom
 277         else
 278                 wishvel[2] += cmd.upmove;
 279
 280         wishspeed = Length(wishvel);
 281         if (wishspeed > sv_maxspeed.value)
 282         {
 283                 VectorScale (wishvel, sv_maxspeed.value/wishspeed, wishvel);
 284                 wishspeed = sv_maxspeed.value;
 285         }
 286         wishspeed *= 0.7;
 287
 288 //
 289 // water friction
 290 //
 291         speed = Length (velocity);
 292         if (speed)
 293         {
 294                 newspeed = speed - sv.frametime * speed * sv_friction.value;
 295                 if (newspeed < 0)
 296                         newspeed = 0;
 297                 VectorScale (velocity, newspeed/speed, velocity);
 298         }
 299         else
 300                 newspeed = 0;
 301
 302 //
 303 // water acceleration
 304 //
 305         if (!wishspeed)
 306                 return;
 307
 308         addspeed = wishspeed - newspeed;
 309         if (addspeed <= 0)
 310                 return;
 311
 312         VectorNormalize (wishvel);
 313         accelspeed = sv_accelerate.value * wishspeed * sv.frametime;
 314         if (accelspeed > addspeed)
 315                 accelspeed = addspeed;
 316
 317         for (i=0 ; i<3 ; i++)
 318                 velocity[i] += accelspeed * wishvel[i];
 319 }
 320
 321 void SV_WaterJump (void)
 322 {
 323         if (sv.time > sv_player->v.teleport_time
 324         || !sv_player->v.waterlevel)
 325         {
 326                 sv_player->v.flags = (int)sv_player->v.flags & ~FL_WATERJUMP;
 327                 sv_player->v.teleport_time = 0;
 328         }
 329         sv_player->v.velocity[0] = sv_player->v.movedir[0];
 330         sv_player->v.velocity[1] = sv_player->v.movedir[1];
 331 }
 332
 333
 334 /*
 335 ===================
 336 SV_AirMove
 337
 338 ===================
 339 */
 340 void SV_AirMove (void)
 341 {
 342         int                     i;
 343         vec3_t          wishvel;
 344         float           fmove, smove;
 345
 346         // LordHavoc: correct quake movement speed bug when looking up/down
 347         wishvel[0] = wishvel[2] = 0;
 348         wishvel[1] = sv_player->v.angles[1];
 349         AngleVectors (wishvel, forward, right, up);
 350 //      AngleVectors (sv_player->v.angles, forward, right, up);
 351
 352         fmove = cmd.forwardmove;
 353         smove = cmd.sidemove;
 354
 355 // hack to not let you back into teleporter
 356         if (sv.time < sv_player->v.teleport_time && fmove < 0)
 357                 fmove = 0;
 358
 359         for (i=0 ; i<3 ; i++)
 360                 wishvel[i] = forward[i]*fmove + right[i]*smove;
 361
 362         if ( (int)sv_player->v.movetype != MOVETYPE_WALK)
 363                 wishvel[2] = cmd.upmove;
 364         else
 365                 wishvel[2] = 0;
 366
 367         VectorCopy (wishvel, wishdir);
 368         wishspeed = VectorNormalizeLength(wishdir);
 369         if (wishspeed > sv_maxspeed.value)
 370         {
 371                 VectorScale (wishvel, sv_maxspeed.value/wishspeed, wishvel);
 372                 wishspeed = sv_maxspeed.value;
 373         }
 374
 375         if ( sv_player->v.movetype == MOVETYPE_NOCLIP)
 376         {       // noclip
 377                 VectorCopy (wishvel, velocity);
 378         }
 379         else if ( onground )
 380         {
 381                 SV_UserFriction ();
 382                 SV_Accelerate ();
 383         }
 384         else
 385         {       // not on ground, so little effect on velocity
 386                 SV_AirAccelerate (wishvel);
 387         }
 388 }
 389
 390 /*
 391 ===================
 392 SV_ClientThink
 393
 394 the move fields specify an intended velocity in pix/sec
 395 the angle fields specify an exact angular motion in degrees
 396 ===================
 397 */
 398 void SV_ClientThink (void)
 399 {
 400         vec3_t          v_angle;
 401
 402         if (sv_player->v.movetype == MOVETYPE_NONE)
 403                 return;
 404
 405         onground = (int)sv_player->v.flags & FL_ONGROUND;
 406
 407         origin = sv_player->v.origin;
 408         velocity = sv_player->v.velocity;
 409
 410         DropPunchAngle ();
 411
 412 //
 413 // if dead, behave differently
 414 //
 415         if (sv_player->v.health <= 0)
 416                 return;
 417
 418 //
 419 // angles
 420 // show 1/3 the pitch angle and all the roll angle
 421         cmd = host_client->cmd;
 422         angles = sv_player->v.angles;
 423
 424         VectorAdd (sv_player->v.v_angle, sv_player->v.punchangle, v_angle);
 425         angles[ROLL] = V_CalcRoll (sv_player->v.angles, sv_player->v.velocity)*4;
 426         if (!sv_player->v.fixangle)
 427         {
 428                 // LordHavoc: pitch was ugly to begin with...  removed except in water
 429                 if (sv_player->v.waterlevel >= 2)
 430                         angles[PITCH] = -v_angle[PITCH]/3;
 431                 else
 432                         angles[PITCH] = 0;
 433                 angles[YAW] = v_angle[YAW];
 434         }
 435
 436         if ( (int)sv_player->v.flags & FL_WATERJUMP )
 437         {
 438                 SV_WaterJump ();
 439                 return;
 440         }
 441 //
 442 // walk
 443 //
 444         if ( (sv_player->v.waterlevel >= 2)     && (sv_player->v.movetype != MOVETYPE_NOCLIP) )
 445         {
 446                 SV_WaterMove ();
 447                 return;
 448         }
 449
 450         SV_AirMove ();
 451 }
 452
 453
 454 /*
 455 ===================
 456 SV_ReadClientMove
 457 ===================
 458 */
 459 void SV_ReadClientMove (usercmd_t *move)
 460 {
 461         int             i;
 462         vec3_t  angle;
 463         int             bits;
 464         eval_t  *val;
 465         float   total;
 466
 467 // read ping time
 468         host_client->ping_times[host_client->num_pings%NUM_PING_TIMES]
 469                 = sv.time - MSG_ReadFloat ();
 470         host_client->num_pings++;
 471         for (i=0, total = 0;i < NUM_PING_TIMES;i++)
 472                 total += host_client->ping_times[i];
 473         host_client->ping = total / NUM_PING_TIMES; // can be used for prediction
 474         host_client->latency = 0;
 475         if (sv_predict.value && (svs.maxclients > 1) && (!sv.paused)) // if paused or a local game, don't predict
 476                 host_client->latency = host_client->ping;
 477         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_ping)))
 478                 val->_float = host_client->ping * 1000.0;
 479
 480 // read current angles
 481         if (dpprotocol)
 482         {
 483                 for (i=0 ; i<3 ; i++)
 484                         angle[i] = MSG_ReadPreciseAngle ();
 485         }
 486         else
 487         {
 488                 for (i=0 ; i<3 ; i++)
 489                         angle[i] = MSG_ReadAngle ();
 490         }
 491
 492         VectorCopy (angle, host_client->edict->v.v_angle);
 493
 494 // read movement
 495         move->forwardmove = MSG_ReadShort ();
 496         move->sidemove = MSG_ReadShort ();
 497         move->upmove = MSG_ReadShort ();
 498         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_movement)))
 499         {
 500                 val->vector[0] = move->forwardmove;
 501                 val->vector[1] = move->sidemove;
 502                 val->vector[2] = move->upmove;
 503         }
 504
 505 // read buttons
 506         bits = MSG_ReadByte ();
 507         host_client->edict->v.button0 = bits & 1;
 508         host_client->edict->v.button2 = (bits & 2)>>1;
 509         // LordHavoc: added 6 new buttons
 510         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button3))) val->_float = ((bits >> 2) & 1);
 511         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button4))) val->_float = ((bits >> 3) & 1);
 512         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button5))) val->_float = ((bits >> 4) & 1);
 513         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button6))) val->_float = ((bits >> 5) & 1);
 514         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button7))) val->_float = ((bits >> 6) & 1);
 515         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button8))) val->_float = ((bits >> 7) & 1);
 516
 517         i = MSG_ReadByte ();
 518         if (i)
 519                 host_client->edict->v.impulse = i;
 520 }
 521
 522 /*
 523 ===================
 524 SV_ReadClientMessage
 525
 526 Returns false if the client should be killed
 527 ===================
 528 */
 529 qboolean SV_ReadClientMessage (void)
 530 {
 531         int             ret;
 532         int             cmd;
 533         char            *s;
 534
 535         do
 536         {
 537 nextmsg:
 538                 ret = NET_GetMessage (host_client->netconnection);
 539                 if (ret == -1)
 540                 {
 541                         Sys_Printf ("SV_ReadClientMessage: NET_GetMessage failed\n");
 542                         return false;
 543                 }
 544                 if (!ret)
 545                         return true;
 546
 547                 MSG_BeginReading ();
 548
 549                 while (1)
 550                 {
 551                         if (!host_client->active)
 552                                 return false;   // a command caused an error
 553
 554                         if (msg_badread)
 555                         {
 556                                 Sys_Printf ("SV_ReadClientMessage: badread\n");
 557                                 return false;
 558                         }
 559
 560                         cmd = MSG_ReadChar ();
 561
 562                         switch (cmd)
 563                         {
 564                         case -1:
 565                                 goto nextmsg;           // end of message
 566
 567                         default:
 568                                 Sys_Printf ("SV_ReadClientMessage: unknown command char\n");
 569                                 return false;
 570
 571                         case clc_nop:
 572 //                              Sys_Printf ("clc_nop\n");
 573                                 break;
 574
 575                         case clc_stringcmd:
 576                                 s = MSG_ReadString ();
 577                                 ret = 0;
 578                                 if (Q_strncasecmp(s, "status", 6) == 0
 579                                  || Q_strncasecmp(s, "name", 4) == 0
 580                                  || Q_strncasecmp(s, "say", 3) == 0
 581                                  || Q_strncasecmp(s, "say_team", 8) == 0
 582                                  || Q_strncasecmp(s, "tell", 4) == 0
 583                                  || Q_strncasecmp(s, "color", 5) == 0
 584                                  || Q_strncasecmp(s, "kill", 4) == 0
 585                                  || Q_strncasecmp(s, "pause", 5) == 0
 586                                  || Q_strncasecmp(s, "spawn", 5) == 0
 587                                  || Q_strncasecmp(s, "begin", 5) == 0
 588                                  || Q_strncasecmp(s, "prespawn", 8) == 0
 589                                  || Q_strncasecmp(s, "kick", 4) == 0
 590                                  || Q_strncasecmp(s, "ping", 4) == 0
 591                                  || Q_strncasecmp(s, "ban", 3) == 0
 592                                  || Q_strncasecmp(s, "pmodel", 6) == 0
 593                                  || (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))
 594                                  || (!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)))
 595                                 {
 596                                         ret = 1;
 597                                         Cmd_ExecuteString (s, src_client);
 598                                 }
 599                                 else
 600                                         Con_DPrintf("%s tried to %s\n", host_client->name, s);
 601                                 /*
 602                                 if (ret == 2)
 603                                         Cbuf_InsertText (s);
 604                                 else if (ret == 1)
 605                                         Cmd_ExecuteString (s, src_client);
 606                                 else
 607                                         Con_DPrintf("%s tried to %s\n", host_client->name, s);
 608                                 */
 609                                 break;
 610
 611                         case clc_disconnect:
 612 //                              Sys_Printf ("SV_ReadClientMessage: client disconnected\n");
 613                                 return false;
 614
 615                         case clc_move:
 616                                 SV_ReadClientMove (&host_client->cmd);
 617                                 break;
 618                         }
 619                 }
 620         } while (ret == 1);
 621
 622         return true;
 623 }
 624
 625
 626 /*
 627 ==================
 628 SV_RunClients
 629 ==================
 630 */
 631 extern dfunction_t *SV_PlayerPhysicsQC;
 632 void SV_RunClients (void)
 633 {
 634         int                             i;
 635
 636         for (i=0, host_client = svs.clients ; i<svs.maxclients ; i++, host_client++)
 637         {
 638                 if (!host_client->active)
 639                         continue;
 640
 641                 sv_player = host_client->edict;
 642
 643                 if (!SV_ReadClientMessage ())
 644                 {
 645                         SV_DropClient (false);  // client misbehaved...
 646                         continue;
 647                 }
 648
 649                 if (!host_client->spawned)
 650                 {
 651                 // clear client movement until a new packet is received
 652                         memset (&host_client->cmd, 0, sizeof(host_client->cmd));
 653                         continue;
 654                 }
 655
 656 // always pause in single player if in console or menus
 657                 if (!sv.paused && (svs.maxclients > 1 || key_dest == key_game) )
 658                 {
 659                         // LordHavoc: QuakeC replacement for SV_ClientThink (player movement)
 660                         if (SV_PlayerPhysicsQC)
 661                         {
 662                                 pr_global_struct->time = sv.time;
 663                                 pr_global_struct->self = EDICT_TO_PROG(sv_player);
 664                                 PR_ExecuteProgram ((func_t)(SV_PlayerPhysicsQC - pr_functions), "");
 665                         }
 666                         else
 667                                 SV_ClientThink ();
 668                 }
 669         }
 670 }
 671