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 = 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 - host_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*host_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*host_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 * host_frametime;
 221         accelspeed = sv_accelerate.value*wishspeed * host_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
 234         len = VectorNormalizeLength (sv_player->v.punchangle);
 235
 236         len -= 10*host_frametime;
 237         if (len < 0)
 238                 len = 0;
 239         VectorScale (sv_player->v.punchangle, len, sv_player->v.punchangle);
 240 }
 241
 242 /*
 243 ===================
 244 SV_WaterMove
 245
 246 ===================
 247 */
 248 void SV_WaterMove (void)
 249 {
 250         int             i;
 251         vec3_t  wishvel;
 252         float   speed, newspeed, wishspeed, addspeed, accelspeed;
 253
 254 //
 255 // user intentions
 256 //
 257         AngleVectors (sv_player->v.v_angle, forward, right, up);
 258
 259         for (i=0 ; i<3 ; i++)
 260                 wishvel[i] = forward[i]*cmd.forwardmove + right[i]*cmd.sidemove;
 261
 262         if (!cmd.forwardmove && !cmd.sidemove && !cmd.upmove)
 263                 wishvel[2] -= 60;               // drift towards bottom
 264         else
 265                 wishvel[2] += cmd.upmove;
 266
 267         wishspeed = Length(wishvel);
 268         if (wishspeed > sv_maxspeed.value)
 269         {
 270                 VectorScale (wishvel, sv_maxspeed.value/wishspeed, wishvel);
 271                 wishspeed = sv_maxspeed.value;
 272         }
 273         wishspeed *= 0.7;
 274
 275 //
 276 // water friction
 277 //
 278         speed = Length (velocity);
 279         if (speed)
 280         {
 281                 newspeed = speed - host_frametime * speed * sv_friction.value;
 282                 if (newspeed < 0)
 283                         newspeed = 0;
 284                 VectorScale (velocity, newspeed/speed, velocity);
 285         }
 286         else
 287                 newspeed = 0;
 288
 289 //
 290 // water acceleration
 291 //
 292         if (!wishspeed)
 293                 return;
 294
 295         addspeed = wishspeed - newspeed;
 296         if (addspeed <= 0)
 297                 return;
 298
 299         VectorNormalize (wishvel);
 300         accelspeed = sv_accelerate.value * wishspeed * host_frametime;
 301         if (accelspeed > addspeed)
 302                 accelspeed = addspeed;
 303
 304         for (i=0 ; i<3 ; i++)
 305                 velocity[i] += accelspeed * wishvel[i];
 306 }
 307
 308 void SV_WaterJump (void)
 309 {
 310         if (sv.time > sv_player->v.teleport_time
 311         || !sv_player->v.waterlevel)
 312         {
 313                 sv_player->v.flags = (int)sv_player->v.flags & ~FL_WATERJUMP;
 314                 sv_player->v.teleport_time = 0;
 315         }
 316         sv_player->v.velocity[0] = sv_player->v.movedir[0];
 317         sv_player->v.velocity[1] = sv_player->v.movedir[1];
 318 }
 319
 320
 321 /*
 322 ===================
 323 SV_AirMove
 324
 325 ===================
 326 */
 327 void SV_AirMove (void)
 328 {
 329         int                     i;
 330         vec3_t          wishvel;
 331         float           fmove, smove;
 332
 333         // LordHavoc: correct quake movement speed bug when looking up/down
 334         wishvel[0] = wishvel[2] = 0;
 335         wishvel[1] = sv_player->v.angles[1];
 336         AngleVectors (wishvel, forward, right, up);
 337 //      AngleVectors (sv_player->v.angles, forward, right, up);
 338
 339         fmove = cmd.forwardmove;
 340         smove = cmd.sidemove;
 341
 342 // hack to not let you back into teleporter
 343         if (sv.time < sv_player->v.teleport_time && fmove < 0)
 344                 fmove = 0;
 345
 346         for (i=0 ; i<3 ; i++)
 347                 wishvel[i] = forward[i]*fmove + right[i]*smove;
 348
 349         if ( (int)sv_player->v.movetype != MOVETYPE_WALK)
 350                 wishvel[2] = cmd.upmove;
 351         else
 352                 wishvel[2] = 0;
 353
 354         VectorCopy (wishvel, wishdir);
 355         wishspeed = VectorNormalizeLength(wishdir);
 356         if (wishspeed > sv_maxspeed.value)
 357         {
 358                 VectorScale (wishvel, sv_maxspeed.value/wishspeed, wishvel);
 359                 wishspeed = sv_maxspeed.value;
 360         }
 361
 362         if ( sv_player->v.movetype == MOVETYPE_NOCLIP)
 363         {       // noclip
 364                 VectorCopy (wishvel, velocity);
 365         }
 366         else if ( onground )
 367         {
 368                 SV_UserFriction ();
 369                 SV_Accelerate ();
 370         }
 371         else
 372         {       // not on ground, so little effect on velocity
 373                 SV_AirAccelerate (wishvel);
 374         }
 375 }
 376
 377 /*
 378 ===================
 379 SV_ClientThink
 380
 381 the move fields specify an intended velocity in pix/sec
 382 the angle fields specify an exact angular motion in degrees
 383 ===================
 384 */
 385 void SV_ClientThink (void)
 386 {
 387         vec3_t          v_angle;
 388
 389         if (sv_player->v.movetype == MOVETYPE_NONE)
 390                 return;
 391
 392         onground = (int)sv_player->v.flags & FL_ONGROUND;
 393
 394         origin = sv_player->v.origin;
 395         velocity = sv_player->v.velocity;
 396
 397         DropPunchAngle ();
 398
 399 //
 400 // if dead, behave differently
 401 //
 402         if (sv_player->v.health <= 0)
 403                 return;
 404
 405 //
 406 // angles
 407 // show 1/3 the pitch angle and all the roll angle
 408         cmd = host_client->cmd;
 409         angles = sv_player->v.angles;
 410
 411         VectorAdd (sv_player->v.v_angle, sv_player->v.punchangle, v_angle);
 412         angles[ROLL] = V_CalcRoll (sv_player->v.angles, sv_player->v.velocity)*4;
 413         if (!sv_player->v.fixangle)
 414         {
 415                 // LordHavoc: pitch was ugly to begin with...  removed except in water
 416                 if (sv_player->v.waterlevel >= 2)
 417                         angles[PITCH] = -v_angle[PITCH]/3;
 418                 else
 419                         angles[PITCH] = 0;
 420                 angles[YAW] = v_angle[YAW];
 421         }
 422
 423         if ( (int)sv_player->v.flags & FL_WATERJUMP )
 424         {
 425                 SV_WaterJump ();
 426                 return;
 427         }
 428 //
 429 // walk
 430 //
 431         if ( (sv_player->v.waterlevel >= 2)
 432         && (sv_player->v.movetype != MOVETYPE_NOCLIP) )
 433         {
 434                 SV_WaterMove ();
 435                 return;
 436         }
 437
 438         SV_AirMove ();
 439 }
 440
 441
 442 /*
 443 ===================
 444 SV_ReadClientMove
 445 ===================
 446 */
 447 void SV_ReadClientMove (usercmd_t *move)
 448 {
 449         int             i;
 450         vec3_t  angle;
 451         int             bits;
 452         eval_t  *val;
 453         float   total;
 454
 455 // read ping time
 456         host_client->ping_times[host_client->num_pings%NUM_PING_TIMES]
 457                 = sv.time - MSG_ReadFloat ();
 458         host_client->num_pings++;
 459         if (val = GETEDICTFIELDVALUE(host_client->edict, eval_ping))
 460         {
 461                 for (i=0, total = 0;i < NUM_PING_TIMES;i++)
 462                         total += host_client->ping_times[i];
 463                 val->_float = 1000.0 / NUM_PING_TIMES;
 464         }
 465
 466 // read current angles
 467         for (i=0 ; i<3 ; i++)
 468                 angle[i] = MSG_ReadAngle ();
 469
 470         VectorCopy (angle, host_client->edict->v.v_angle);
 471
 472 // read movement
 473         move->forwardmove = MSG_ReadShort ();
 474         move->sidemove = MSG_ReadShort ();
 475         move->upmove = MSG_ReadShort ();
 476         if (val = GETEDICTFIELDVALUE(host_client->edict, eval_movement))
 477         {
 478                 val->vector[0] = move->forwardmove;
 479                 val->vector[1] = move->sidemove;
 480                 val->vector[2] = move->upmove;
 481         }
 482
 483 // read buttons
 484         bits = MSG_ReadByte ();
 485         host_client->edict->v.button0 = bits & 1;
 486         host_client->edict->v.button2 = (bits & 2)>>1;
 487         // LordHavoc: added 6 new buttons
 488         if (val = GETEDICTFIELDVALUE(host_client->edict, eval_button3)) val->_float = ((bits >> 2) & 1);
 489         if (val = GETEDICTFIELDVALUE(host_client->edict, eval_button4)) val->_float = ((bits >> 3) & 1);
 490         if (val = GETEDICTFIELDVALUE(host_client->edict, eval_button5)) val->_float = ((bits >> 4) & 1);
 491         if (val = GETEDICTFIELDVALUE(host_client->edict, eval_button6)) val->_float = ((bits >> 5) & 1);
 492         if (val = GETEDICTFIELDVALUE(host_client->edict, eval_button7)) val->_float = ((bits >> 6) & 1);
 493         if (val = GETEDICTFIELDVALUE(host_client->edict, eval_button8)) val->_float = ((bits >> 7) & 1);
 494
 495         i = MSG_ReadByte ();
 496         if (i)
 497                 host_client->edict->v.impulse = i;
 498 }
 499
 500 /*
 501 ===================
 502 SV_ReadClientMessage
 503
 504 Returns false if the client should be killed
 505 ===================
 506 */
 507 qboolean SV_ReadClientMessage (void)
 508 {
 509         int             ret;
 510         int             cmd;
 511         char            *s;
 512
 513         do
 514         {
 515 nextmsg:
 516                 ret = NET_GetMessage (host_client->netconnection);
 517                 if (ret == -1)
 518                 {
 519                         Sys_Printf ("SV_ReadClientMessage: NET_GetMessage failed\n");
 520                         return false;
 521                 }
 522                 if (!ret)
 523                         return true;
 524
 525                 MSG_BeginReading ();
 526
 527                 while (1)
 528                 {
 529                         if (!host_client->active)
 530                                 return false;   // a command caused an error
 531
 532                         if (msg_badread)
 533                         {
 534                                 Sys_Printf ("SV_ReadClientMessage: badread\n");
 535                                 return false;
 536                         }
 537
 538                         cmd = MSG_ReadChar ();
 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\n");
 547                                 return false;
 548
 549                         case clc_nop:
 550 //                              Sys_Printf ("clc_nop\n");
 551                                 break;
 552
 553                         case clc_stringcmd:
 554                                 s = MSG_ReadString ();
 555                                 if (host_client->privileged)
 556                                         ret = 2;
 557                                 else
 558                                         ret = 0;
 559                                 if (Q_strncasecmp(s, "status", 6) == 0
 560                                  || Q_strncasecmp(s, "name", 4) == 0
 561                                  || Q_strncasecmp(s, "say", 3) == 0
 562                                  || Q_strncasecmp(s, "say_team", 8) == 0
 563                                  || Q_strncasecmp(s, "tell", 4) == 0
 564                                  || Q_strncasecmp(s, "color", 5) == 0
 565                                  || Q_strncasecmp(s, "kill", 4) == 0
 566                                  || Q_strncasecmp(s, "pause", 5) == 0
 567                                  || Q_strncasecmp(s, "spawn", 5) == 0
 568                                  || Q_strncasecmp(s, "begin", 5) == 0
 569                                  || Q_strncasecmp(s, "prespawn", 8) == 0
 570                                  || Q_strncasecmp(s, "kick", 4) == 0
 571                                  || Q_strncasecmp(s, "ping", 4) == 0
 572                                  || Q_strncasecmp(s, "ban", 3) == 0
 573                                  || Q_strncasecmp(s, "pmodel", 6) == 0
 574                                  || (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))
 575                                  || (!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)))
 576                                         ret = 1;
 577                                 if (ret == 2)
 578                                         Cbuf_InsertText (s);
 579                                 else if (ret == 1)
 580                                         Cmd_ExecuteString (s, src_client);
 581                                 else
 582                                         Con_DPrintf("%s tried to %s\n", host_client->name, s);
 583                                 break;
 584
 585                         case clc_disconnect:
 586 //                              Sys_Printf ("SV_ReadClientMessage: client disconnected\n");
 587                                 return false;
 588
 589                         case clc_move:
 590                                 SV_ReadClientMove (&host_client->cmd);
 591                                 break;
 592                         }
 593                 }
 594         } while (ret == 1);
 595
 596         return true;
 597 }
 598
 599
 600 /*
 601 ==================
 602 SV_RunClients
 603 ==================
 604 */
 605 extern dfunction_t *SV_PlayerPhysicsQC;
 606 void SV_RunClients (void)
 607 {
 608         int                             i;
 609
 610         for (i=0, host_client = svs.clients ; i<svs.maxclients ; i++, host_client++)
 611         {
 612                 if (!host_client->active)
 613                         continue;
 614
 615                 sv_player = host_client->edict;
 616
 617                 if (!SV_ReadClientMessage ())
 618                 {
 619                         SV_DropClient (false);  // client misbehaved...
 620                         continue;
 621                 }
 622
 623                 if (!host_client->spawned)
 624                 {
 625                 // clear client movement until a new packet is received
 626                         memset (&host_client->cmd, 0, sizeof(host_client->cmd));
 627                         continue;
 628                 }
 629
 630 // always pause in single player if in console or menus
 631                 if (!sv.paused && (svs.maxclients > 1 || key_dest == key_game) )
 632                 {
 633                         // LordHavoc: QuakeC replacement for SV_ClientThink (player movement)
 634                         if (SV_PlayerPhysicsQC)
 635                         {
 636                                 pr_global_struct->time = sv.time;
 637                                 pr_global_struct->self = EDICT_TO_PROG(sv_player);
 638                                 PR_ExecuteProgram ((func_t)(SV_PlayerPhysicsQC - pr_functions));
 639                         }
 640                         else
 641                                 SV_ClientThink ();
 642                 }
 643         }
 644 }
 645