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 extern  cvar_t  sv_stopspeed;
  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 = sinf(angleval);
  67         cosval = cosf(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 = sqrtf(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 - host_frametime*control*friction;
 152
 153         if (newspeed < 0)
 154                 newspeed = 0;
 155         newspeed /= speed;
 156
 157         vel[0] = vel[0] * newspeed;
 158         vel[1] = vel[1] * newspeed;
 159         vel[2] = vel[2] * newspeed;
 160 }
 161
 162 /*
 163 ==============
 164 SV_Accelerate
 165 ==============
 166 */
 167 cvar_t  sv_maxspeed = {"sv_maxspeed", "320", false, true};
 168 cvar_t  sv_accelerate = {"sv_accelerate", "10"};
 169 #if 0
 170 void SV_Accelerate (vec3_t wishvel)
 171 {
 172         int                     i;
 173         float           addspeed, accelspeed;
 174         vec3_t          pushvec;
 175
 176         if (wishspeed == 0)
 177                 return;
 178
 179         VectorSubtract (wishvel, velocity, pushvec);
 180         addspeed = VectorNormalize (pushvec);
 181
 182         accelspeed = sv_accelerate.value*host_frametime*addspeed;
 183         if (accelspeed > addspeed)
 184                 accelspeed = addspeed;
 185
 186         for (i=0 ; i<3 ; i++)
 187                 velocity[i] += accelspeed*pushvec[i];
 188 }
 189 #endif
 190 void SV_Accelerate (void)
 191 {
 192         int                     i;
 193         float           addspeed, accelspeed, currentspeed;
 194
 195         currentspeed = DotProduct (velocity, wishdir);
 196         addspeed = wishspeed - currentspeed;
 197         if (addspeed <= 0)
 198                 return;
 199         accelspeed = sv_accelerate.value*host_frametime*wishspeed;
 200         if (accelspeed > addspeed)
 201                 accelspeed = addspeed;
 202
 203         for (i=0 ; i<3 ; i++)
 204                 velocity[i] += accelspeed*wishdir[i];
 205 }
 206
 207 void SV_AirAccelerate (vec3_t wishveloc)
 208 {
 209         int                     i;
 210         float           addspeed, wishspd, accelspeed, currentspeed;
 211
 212         wishspd = VectorNormalize (wishveloc);
 213         if (wishspd > 30)
 214                 wishspd = 30;
 215         currentspeed = DotProduct (velocity, wishveloc);
 216         addspeed = wishspd - currentspeed;
 217         if (addspeed <= 0)
 218                 return;
 219 //      accelspeed = sv_accelerate.value * host_frametime;
 220         accelspeed = sv_accelerate.value*wishspeed * host_frametime;
 221         if (accelspeed > addspeed)
 222                 accelspeed = addspeed;
 223
 224         for (i=0 ; i<3 ; i++)
 225                 velocity[i] += accelspeed*wishveloc[i];
 226 }
 227
 228
 229 void DropPunchAngle (void)
 230 {
 231         float   len;
 232
 233         len = VectorNormalize (sv_player->v.punchangle);
 234
 235         if(kurok)
 236                 len -= 25*host_frametime;
 237         else
 238                 len -= 10*host_frametime;
 239
 240         if (len < 0)
 241                 len = 0;
 242         VectorScale (sv_player->v.punchangle, len, sv_player->v.punchangle);
 243 }
 244
 245 /*
 246 ===================
 247 SV_WaterMove
 248
 249 ===================
 250 */
 251 void SV_WaterMove (void)
 252 {
 253         int             i;
 254         vec3_t  wishvel;
 255         float   speed, newspeed, wishspeed, addspeed, accelspeed;
 256
 257 //
 258 // user intentions
 259 //
 260         AngleVectors (sv_player->v.v_angle, forward, right, up);
 261
 262         for (i=0 ; i<3 ; i++)
 263                 wishvel[i] = forward[i]*cmd.forwardmove + right[i]*cmd.sidemove;
 264
 265         if (!cmd.forwardmove && !cmd.sidemove && !cmd.upmove)
 266         {
 267         if (!kurok)
 268                     wishvel[2] -= 60;           // drift towards bottom
 269     }
 270         else
 271                 wishvel[2] += cmd.upmove;
 272
 273         wishspeed = Length(wishvel);
 274         if (wishspeed > sv_maxspeed.value)
 275         {
 276                 VectorScale (wishvel, sv_maxspeed.value/wishspeed, wishvel);
 277                 wishspeed = sv_maxspeed.value;
 278         }
 279         wishspeed *= 0.7;
 280
 281 //
 282 // water friction
 283 //
 284         speed = Length (velocity);
 285         if (speed)
 286         {
 287                 newspeed = speed - host_frametime * speed * sv_friction.value;
 288                 if (newspeed < 0)
 289                         newspeed = 0;
 290                 VectorScale (velocity, newspeed/speed, velocity);
 291         }
 292         else
 293                 newspeed = 0;
 294
 295 //
 296 // water acceleration
 297 //
 298         if (!wishspeed)
 299                 return;
 300
 301         addspeed = wishspeed - newspeed;
 302         if (addspeed <= 0)
 303                 return;
 304
 305         VectorNormalize (wishvel);
 306         accelspeed = sv_accelerate.value * wishspeed * host_frametime;
 307         if (accelspeed > addspeed)
 308                 accelspeed = addspeed;
 309
 310         for (i=0 ; i<3 ; i++)
 311                 velocity[i] += accelspeed * wishvel[i];
 312 }
 313
 314 void SV_WaterJump (void)
 315 {
 316         if (sv.time > sv_player->v.teleport_time
 317         || !sv_player->v.waterlevel)
 318         {
 319                 sv_player->v.flags = (int)sv_player->v.flags & ~FL_WATERJUMP;
 320                 sv_player->v.teleport_time = 0;
 321         }
 322         sv_player->v.velocity[0] = sv_player->v.movedir[0];
 323         sv_player->v.velocity[1] = sv_player->v.movedir[1];
 324 }
 325
 326
 327 /*
 328 ===================
 329 SV_AirMove
 330
 331 ===================
 332 */
 333 void SV_AirMove (void)
 334 {
 335         int                     i;
 336         vec3_t          wishvel;
 337         float           fmove, smove;
 338
 339         AngleVectors (sv_player->v.angles, forward, right, up);
 340
 341         fmove = cmd.forwardmove;
 342         smove = cmd.sidemove;
 343
 344 // hack to not let you back into teleporter
 345         if (sv.time < sv_player->v.teleport_time && fmove < 0)
 346                 fmove = 0;
 347
 348         for (i=0 ; i<3 ; i++)
 349                 wishvel[i] = forward[i]*fmove + right[i]*smove;
 350
 351         if ( (int)sv_player->v.movetype != MOVETYPE_WALK)
 352                 wishvel[2] = cmd.upmove;
 353         else
 354                 wishvel[2] = 0;
 355
 356         VectorCopy (wishvel, wishdir);
 357         wishspeed = VectorNormalize(wishdir);
 358         if (wishspeed > sv_maxspeed.value)
 359         {
 360                 VectorScale (wishvel, sv_maxspeed.value/wishspeed, wishvel);
 361                 wishspeed = sv_maxspeed.value;
 362         }
 363
 364         if ( sv_player->v.movetype == MOVETYPE_NOCLIP)
 365         {       // noclip
 366                 VectorCopy (wishvel, velocity);
 367         }
 368         else if ( onground )
 369         {
 370                 SV_UserFriction ();
 371                 SV_Accelerate ();
 372         }
 373         else
 374         {       // not on ground, so little effect on velocity
 375                 SV_AirAccelerate (wishvel);
 376         }
 377 }
 378
 379 /*
 380 ===================
 381 SV_ClientThink
 382
 383 the move fields specify an intended velocity in pix/sec
 384 the angle fields specify an exact angular motion in degrees
 385 ===================
 386 */
 387 void SV_ClientThink (void)
 388 {
 389         vec3_t          v_angle;
 390
 391         if (sv_player->v.movetype == MOVETYPE_NONE)
 392                 return;
 393
 394         onground = (int)sv_player->v.flags & FL_ONGROUND;
 395
 396         origin = sv_player->v.origin;
 397         velocity = sv_player->v.velocity;
 398
 399         DropPunchAngle ();
 400
 401 //
 402 // if dead, behave differently
 403 //
 404         if (sv_player->v.health <= 0)
 405                 return;
 406
 407 //
 408 // angles
 409 // show 1/3 the pitch angle and all the roll angle
 410         cmd = host_client->cmd;
 411         angles = sv_player->v.angles;
 412
 413         VectorAdd (sv_player->v.v_angle, sv_player->v.punchangle, v_angle);
 414         angles[ROLL] = V_CalcRoll (sv_player->v.angles, sv_player->v.velocity)*4;
 415         if (!sv_player->v.fixangle)
 416         {
 417                 angles[PITCH] = -v_angle[PITCH]/3;
 418                 angles[YAW] = v_angle[YAW];
 419         }
 420
 421         if ( (int)sv_player->v.flags & FL_WATERJUMP )
 422         {
 423                 SV_WaterJump ();
 424                 return;
 425         }
 426 //
 427 // walk
 428 //
 429         if ( (sv_player->v.waterlevel >= 2)
 430         && (sv_player->v.movetype != MOVETYPE_NOCLIP) )
 431         {
 432                 SV_WaterMove ();
 433                 return;
 434         }
 435
 436         SV_AirMove ();
 437 }
 438
 439
 440 /*
 441 ===================
 442 SV_ReadClientMove
 443 ===================
 444 */
 445 void SV_ReadClientMove (usercmd_t *move)
 446 {
 447         int             i;
 448         vec3_t  angle;
 449         int             bits;
 450
 451 // read ping time
 452         host_client->ping_times[host_client->num_pings%NUM_PING_TIMES]
 453                 = sv.time - MSG_ReadFloat ();
 454         host_client->num_pings++;
 455
 456 // read current angles
 457 // JPG - precise aim for ProQuake!!
 458     for (i=0 ; i<3 ; i++)
 459         angle[i] = MSG_ReadPreciseAngle ();
 460
 461 // read current angles
 462 //      for (i=0 ; i<3 ; i++)
 463 //              angle[i] = MSG_ReadAngle ();
 464
 465         VectorCopy (angle, host_client->edict->v.v_angle);
 466
 467 // read movement
 468         move->forwardmove = MSG_ReadShort ();
 469         move->sidemove = MSG_ReadShort ();
 470         move->upmove = MSG_ReadShort ();
 471
 472 // read buttons
 473         bits = MSG_ReadByte ();
 474         host_client->edict->v.button0 = bits & 1;
 475         host_client->edict->v.button2 = (bits & 2)>>1;
 476
 477         i = MSG_ReadByte ();
 478         if (i)
 479                 host_client->edict->v.impulse = i;
 480
 481 #ifdef QUAKE2
 482 // read light level
 483         host_client->edict->v.light_level = MSG_ReadByte ();
 484 #endif
 485 }
 486
 487 /*
 488 ===================
 489 SV_ReadClientMessage
 490
 491 Returns false if the client should be killed
 492 ===================
 493 */
 494 qboolean SV_ReadClientMessage (void)
 495 {
 496         int             ret;
 497         int             cmd;
 498         char            *s;
 499
 500         do
 501         {
 502 nextmsg:
 503                 ret = NET_GetMessage (host_client->netconnection);
 504                 if (ret == -1)
 505                 {
 506                         Sys_Printf ("SV_ReadClientMessage: NET_GetMessage failed\n");
 507                         return false;
 508                 }
 509                 if (!ret)
 510                         return true;
 511
 512                 MSG_BeginReading ();
 513
 514                 while (1)
 515                 {
 516                         if (!host_client->active)
 517                                 return false;   // a command caused an error
 518
 519                         if (msg_badread)
 520                         {
 521                                 Sys_Printf ("SV_ReadClientMessage: badread\n");
 522                                 return false;
 523                         }
 524
 525                         cmd = MSG_ReadChar ();
 526
 527                         switch (cmd)
 528                         {
 529                         case -1:
 530                                 goto nextmsg;           // end of message
 531
 532                         default:
 533                                 Sys_Printf ("SV_ReadClientMessage: unknown command char\n");
 534                                 return false;
 535
 536                         case clc_nop:
 537 //                              Sys_Printf ("clc_nop\n");
 538                                 break;
 539
 540                         case clc_stringcmd:
 541                                 s = MSG_ReadString ();
 542                                 if (host_client->privileged)
 543                                         ret = 2;
 544                                 else
 545                                         ret = 0;
 546                                 if (Q_strncasecmp(s, "status", 6) == 0)
 547                                         ret = 1;
 548                                 else if (Q_strncasecmp(s, "god", 3) == 0)
 549                                         ret = 1;
 550                                 else if (Q_strncasecmp(s, "notarget", 8) == 0)
 551                                         ret = 1;
 552                                 else if (Q_strncasecmp(s, "fly", 3) == 0)
 553                                         ret = 1;
 554                                 else if (Q_strncasecmp(s, "name", 4) == 0)
 555                                         ret = 1;
 556                                 else if (Q_strncasecmp(s, "noclip", 6) == 0)
 557                                         ret = 1;
 558                                 else if (Q_strncasecmp(s, "say", 3) == 0)
 559                                         ret = 1;
 560                                 else if (Q_strncasecmp(s, "say_team", 8) == 0)
 561                                         ret = 1;
 562                                 else if (Q_strncasecmp(s, "tell", 4) == 0)
 563                                         ret = 1;
 564                                 else if (Q_strncasecmp(s, "color", 5) == 0)
 565                                         ret = 1;
 566                                 else if (Q_strncasecmp(s, "kill", 4) == 0)
 567                                         ret = 1;
 568                                 else if (Q_strncasecmp(s, "pause", 5) == 0)
 569                                         ret = 1;
 570                                 else if (Q_strncasecmp(s, "spawn", 5) == 0)
 571                                         ret = 1;
 572                                 else if (Q_strncasecmp(s, "begin", 5) == 0)
 573                                         ret = 1;
 574                                 else if (Q_strncasecmp(s, "prespawn", 8) == 0)
 575                                         ret = 1;
 576                                 else if (Q_strncasecmp(s, "kick", 4) == 0)
 577                                         ret = 1;
 578                                 else if (Q_strncasecmp(s, "ping", 4) == 0)
 579                                         ret = 1;
 580                                 else if (Q_strncasecmp(s, "give", 4) == 0)
 581                                         ret = 1;
 582                                 else if (Q_strncasecmp(s, "ban", 3) == 0)
 583                                         ret = 1;
 584                                 if (ret == 2)
 585                                         Cbuf_InsertText (s);
 586                                 else if (ret == 1)
 587                                         Cmd_ExecuteString (s, src_client);
 588                                 else
 589                                         Con_DPrintf("%s tried to %s\n", host_client->name, s);
 590                                 break;
 591
 592                         case clc_disconnect:
 593 //                              Sys_Printf ("SV_ReadClientMessage: client disconnected\n");
 594                                 return false;
 595
 596                         case clc_move:
 597                                 SV_ReadClientMove (&host_client->cmd);
 598                                 break;
 599                         }
 600                 }
 601         } while (ret == 1);
 602
 603         return true;
 604 }
 605
 606 extern qboolean bmg_type_changed;
 607 /*
 608 ==================
 609 SV_RunClients
 610 ==================
 611 */
 612 void SV_RunClients (void)
 613 {
 614         int                             i;
 615
 616         for (i=0, host_client = svs.clients ; i<svs.maxclients ; i++, host_client++)
 617         {
 618                 if (!host_client->active)
 619                         continue;
 620
 621                 sv_player = host_client->edict;
 622
 623                 if (!SV_ReadClientMessage ())
 624                 {
 625                         SV_DropClient (false);  // client misbehaved...
 626                         continue;
 627                 }
 628
 629                 if (!host_client->spawned)
 630                 {
 631                 // clear client movement until a new packet is received
 632                         memset (&host_client->cmd, 0, sizeof(host_client->cmd));
 633                         continue;
 634                 }
 635
 636 // always pause in single player if in console or menus
 637                 if (!sv.paused && (svs.maxclients > 1 || key_dest == key_game) )
 638                 {
 639                         SV_ClientThink ();
 640                         if(kurok)
 641                         {
 642                 Cvar_Set("bgmtype","cd");
 643                 bmg_type_changed = true;
 644                         }
 645                 }
 646                 else
 647                 {
 648                     if(kurok)
 649                     {
 650                 Cvar_Set("bgmtype","none");
 651                 bmg_type_changed = true;
 652                     }
 653                 }
 654         }
 655 }
 656