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