sv_user.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // sv_user.c -- server code for moving users
  21
  22 #include "quakedef.h"
  23
  24 edict_t *sv_player;
  25
  26 cvar_t sv_edgefriction = {0, "edgefriction", "2"};
  27 cvar_t sv_predict = {0, "sv_predict", "1"};
  28 cvar_t sv_deltacompress = {0, "sv_deltacompress", "1"};
  29 cvar_t sv_idealpitchscale = {0, "sv_idealpitchscale","0.8"};
  30 cvar_t sv_maxspeed = {CVAR_NOTIFY, "sv_maxspeed", "320"};
  31 cvar_t sv_accelerate = {0, "sv_accelerate", "10"};
  32
  33 static vec3_t forward, right, up;
  34
  35 vec3_t wishdir;
  36 float wishspeed;
  37
  38 // world
  39 float *angles;
  40 float *origin;
  41 float *velocity;
  42
  43 qboolean onground;
  44
  45 usercmd_t cmd;
  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, MOVE_NOMONSTERS, sv_player);
  81                 // if looking at a wall, leave ideal the way is was
  82                 if (tr.allsolid)
  83                         return;
  84
  85                 // near a dropoff
  86                 if (tr.fraction == 1)
  87                         return;
  88
  89                 z[i] = top[2] + tr.fraction*(bottom[2]-top[2]);
  90         }
  91
  92         dir = 0;
  93         steps = 0;
  94         for (j=1 ; j<i ; j++)
  95         {
  96                 step = z[j] - z[j-1];
  97                 if (step > -ON_EPSILON && step < ON_EPSILON)
  98                         continue;
  99
 100                 // mixed changes
 101                 if (dir && ( step-dir > ON_EPSILON || step-dir < -ON_EPSILON ) )
 102                         return;
 103
 104                 steps++;
 105                 dir = step;
 106         }
 107
 108         if (!dir)
 109         {
 110                 sv_player->v.idealpitch = 0;
 111                 return;
 112         }
 113
 114         if (steps < 2)
 115                 return;
 116         sv_player->v.idealpitch = -dir * sv_idealpitchscale.value;
 117 }
 118
 119
 120 /*
 121 ==================
 122 SV_UserFriction
 123
 124 ==================
 125 */
 126 void SV_UserFriction (void)
 127 {
 128         float *vel, speed, newspeed, control, friction;
 129         vec3_t start, stop;
 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, MOVE_NOMONSTERS, 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 void SV_Accelerate (void)
 171 {
 172         int i;
 173         float addspeed, accelspeed, currentspeed;
 174
 175         currentspeed = DotProduct (velocity, wishdir);
 176         addspeed = wishspeed - currentspeed;
 177         if (addspeed <= 0)
 178                 return;
 179         accelspeed = sv_accelerate.value*sv.frametime*wishspeed;
 180         if (accelspeed > addspeed)
 181                 accelspeed = addspeed;
 182
 183         for (i=0 ; i<3 ; i++)
 184                 velocity[i] += accelspeed*wishdir[i];
 185 }
 186
 187 void SV_AirAccelerate (vec3_t wishveloc)
 188 {
 189         int i;
 190         float addspeed, wishspd, accelspeed, currentspeed;
 191
 192         wishspd = VectorNormalizeLength (wishveloc);
 193         if (wishspd > 30)
 194                 wishspd = 30;
 195         currentspeed = DotProduct (velocity, wishveloc);
 196         addspeed = wishspd - currentspeed;
 197         if (addspeed <= 0)
 198                 return;
 199         accelspeed = sv_accelerate.value*wishspeed * sv.frametime;
 200         if (accelspeed > addspeed)
 201                 accelspeed = addspeed;
 202
 203         for (i=0 ; i<3 ; i++)
 204                 velocity[i] += accelspeed*wishveloc[i];
 205 }
 206
 207
 208 void DropPunchAngle (void)
 209 {
 210         float len;
 211         eval_t *val;
 212
 213         len = VectorNormalizeLength (sv_player->v.punchangle);
 214
 215         len -= 10*sv.frametime;
 216         if (len < 0)
 217                 len = 0;
 218         VectorScale (sv_player->v.punchangle, len, sv_player->v.punchangle);
 219
 220         if ((val = GETEDICTFIELDVALUE(sv_player, eval_punchvector)))
 221         {
 222                 len = VectorNormalizeLength (val->vector);
 223
 224                 len -= 20*sv.frametime;
 225                 if (len < 0)
 226                         len = 0;
 227                 VectorScale (val->vector, len, val->vector);
 228         }
 229 }
 230
 231 /*
 232 ===================
 233 SV_FreeMove
 234 ===================
 235 */
 236 void SV_FreeMove (void)
 237 {
 238         int i;
 239         float wishspeed;
 240
 241         AngleVectors (sv_player->v.v_angle, forward, right, up);
 242
 243         for (i = 0; i < 3; i++)
 244                 velocity[i] = forward[i] * cmd.forwardmove + right[i] * cmd.sidemove;
 245
 246         velocity[2] += cmd.upmove;
 247
 248         wishspeed = VectorLength (velocity);
 249         if (wishspeed > sv_maxspeed.value)
 250         {
 251                 VectorScale (velocity, sv_maxspeed.value / wishspeed, velocity);
 252                 wishspeed = sv_maxspeed.value;
 253         }
 254 }
 255
 256 /*
 257 ===================
 258 SV_WaterMove
 259
 260 ===================
 261 */
 262 void SV_WaterMove (void)
 263 {
 264         int i;
 265         vec3_t wishvel;
 266         float speed, newspeed, wishspeed, addspeed, accelspeed, temp;
 267
 268         // user intentions
 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 = VectorLength(wishvel);
 280         if (wishspeed > sv_maxspeed.value)
 281         {
 282                 temp = sv_maxspeed.value/wishspeed;
 283                 VectorScale (wishvel, temp, wishvel);
 284                 wishspeed = sv_maxspeed.value;
 285         }
 286         wishspeed *= 0.7;
 287
 288         // water friction
 289         speed = VectorLength (velocity);
 290         if (speed)
 291         {
 292                 newspeed = speed - sv.frametime * speed * sv_friction.value;
 293                 if (newspeed < 0)
 294                         newspeed = 0;
 295                 temp = newspeed/speed;
 296                 VectorScale (velocity, temp, velocity);
 297         }
 298         else
 299                 newspeed = 0;
 300
 301         // water acceleration
 302         if (!wishspeed)
 303                 return;
 304
 305         addspeed = wishspeed - newspeed;
 306         if (addspeed <= 0)
 307                 return;
 308
 309         VectorNormalize (wishvel);
 310         accelspeed = sv_accelerate.value * wishspeed * sv.frametime;
 311         if (accelspeed > addspeed)
 312                 accelspeed = addspeed;
 313
 314         for (i=0 ; i<3 ; i++)
 315                 velocity[i] += accelspeed * wishvel[i];
 316 }
 317
 318 void SV_WaterJump (void)
 319 {
 320         if (sv.time > sv_player->v.teleport_time || !sv_player->v.waterlevel)
 321         {
 322                 sv_player->v.flags = (int)sv_player->v.flags & ~FL_WATERJUMP;
 323                 sv_player->v.teleport_time = 0;
 324         }
 325         sv_player->v.velocity[0] = sv_player->v.movedir[0];
 326         sv_player->v.velocity[1] = sv_player->v.movedir[1];
 327 }
 328
 329
 330 /*
 331 ===================
 332 SV_AirMove
 333
 334 ===================
 335 */
 336 void SV_AirMove (void)
 337 {
 338         int i;
 339         vec3_t wishvel;
 340         float fmove, smove, temp;
 341
 342         // LordHavoc: correct quake movement speed bug when looking up/down
 343         wishvel[0] = wishvel[2] = 0;
 344         wishvel[1] = sv_player->v.angles[1];
 345         AngleVectors (wishvel, forward, right, up);
 346
 347         fmove = cmd.forwardmove;
 348         smove = cmd.sidemove;
 349
 350 // hack to not let you back into teleporter
 351         if (sv.time < sv_player->v.teleport_time && fmove < 0)
 352                 fmove = 0;
 353
 354         for (i=0 ; i<3 ; i++)
 355                 wishvel[i] = forward[i]*fmove + right[i]*smove;
 356
 357         if ((int)sv_player->v.movetype != MOVETYPE_WALK)
 358                 wishvel[2] += cmd.upmove;
 359
 360         VectorCopy (wishvel, wishdir);
 361         wishspeed = VectorNormalizeLength(wishdir);
 362         if (wishspeed > sv_maxspeed.value)
 363         {
 364                 temp = sv_maxspeed.value/wishspeed;
 365                 VectorScale (wishvel, temp, wishvel);
 366                 wishspeed = sv_maxspeed.value;
 367         }
 368
 369         if (sv_player->v.movetype == MOVETYPE_NOCLIP)
 370         {
 371                 // noclip
 372                 VectorCopy (wishvel, velocity);
 373         }
 374         else if ( onground )
 375         {
 376                 SV_UserFriction ();
 377                 SV_Accelerate ();
 378         }
 379         else
 380         {
 381                 // not on ground, so little effect on velocity
 382                 SV_AirAccelerate (wishvel);
 383         }
 384 }
 385
 386 /*
 387 ===================
 388 SV_ClientThink
 389
 390 the move fields specify an intended velocity in pix/sec
 391 the angle fields specify an exact angular motion in degrees
 392 ===================
 393 */
 394 void SV_ClientThink (void)
 395 {
 396         vec3_t v_angle;
 397
 398         if (sv_player->v.movetype == MOVETYPE_NONE)
 399                 return;
 400
 401         onground = (int)sv_player->v.flags & FL_ONGROUND;
 402
 403         origin = sv_player->v.origin;
 404         velocity = sv_player->v.velocity;
 405
 406         DropPunchAngle ();
 407
 408         // if dead, behave differently
 409         if (sv_player->v.health <= 0)
 410                 return;
 411
 412         // angles
 413         // show 1/3 the pitch angle and all the roll angle
 414         cmd = host_client->cmd;
 415         angles = sv_player->v.angles;
 416
 417         VectorAdd (sv_player->v.v_angle, sv_player->v.punchangle, v_angle);
 418         angles[ROLL] = V_CalcRoll (sv_player->v.angles, sv_player->v.velocity)*4;
 419         if (!sv_player->v.fixangle)
 420         {
 421                 // LordHavoc: pitch was ugly to begin with...  removed except in water
 422                 if (sv_player->v.waterlevel >= 2)
 423                         angles[PITCH] = -v_angle[PITCH]/3;
 424                 else
 425                         angles[PITCH] = 0;
 426                 angles[YAW] = v_angle[YAW];
 427         }
 428
 429         if ( (int)sv_player->v.flags & FL_WATERJUMP )
 430         {
 431                 SV_WaterJump ();
 432                 return;
 433         }
 434
 435         // Player is (somehow) outside of the map, or flying, or noclipping
 436         if (SV_TestEntityPosition (sv_player)
 437          || sv_player->v.movetype == MOVETYPE_FLY
 438          || sv_player->v.movetype == MOVETYPE_NOCLIP)
 439         {
 440                 SV_FreeMove ();
 441                 return;
 442         }
 443
 444         // walk
 445         if ((sv_player->v.waterlevel >= 2) && (sv_player->v.movetype != MOVETYPE_NOCLIP))
 446         {
 447                 SV_WaterMove ();
 448                 return;
 449         }
 450
 451         SV_AirMove ();
 452 }
 453
 454
 455 /*
 456 ===================
 457 SV_ReadClientMove
 458 ===================
 459 */
 460 void SV_ReadClientMove (usercmd_t *move)
 461 {
 462         int i;
 463         vec3_t angle;
 464         int bits;
 465         eval_t *val;
 466         float total;
 467
 468         // read ping time
 469         host_client->ping_times[host_client->num_pings % NUM_PING_TIMES] = 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         // can be used for prediction
 474         host_client->ping = total / NUM_PING_TIMES;
 475         host_client->latency = 0;
 476         // if paused or a local game, don't predict
 477         if (sv_predict.integer && (svs.maxclients > 1) && (!sv.paused))
 478                 host_client->latency = host_client->ping;
 479         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_ping)))
 480                 val->_float = host_client->ping * 1000.0;
 481
 482         // read current angles
 483         // dpprotocol version 2
 484         for (i = 0;i < 3;i++)
 485                 angle[i] = MSG_ReadFloat ();
 486
 487         VectorCopy (angle, host_client->edict->v.v_angle);
 488
 489         // read movement
 490         move->forwardmove = MSG_ReadShort ();
 491         move->sidemove = MSG_ReadShort ();
 492         move->upmove = MSG_ReadShort ();
 493         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_movement)))
 494         {
 495                 val->vector[0] = move->forwardmove;
 496                 val->vector[1] = move->sidemove;
 497                 val->vector[2] = move->upmove;
 498         }
 499
 500         // read buttons
 501         bits = MSG_ReadByte ();
 502         host_client->edict->v.button0 = bits & 1;
 503         host_client->edict->v.button2 = (bits & 2)>>1;
 504         // LordHavoc: added 6 new buttons
 505         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button3))) val->_float = ((bits >> 2) & 1);
 506         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button4))) val->_float = ((bits >> 3) & 1);
 507         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button5))) val->_float = ((bits >> 4) & 1);
 508         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button6))) val->_float = ((bits >> 5) & 1);
 509         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button7))) val->_float = ((bits >> 6) & 1);
 510         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button8))) val->_float = ((bits >> 7) & 1);
 511
 512         i = MSG_ReadByte ();
 513         if (i)
 514                 host_client->edict->v.impulse = i;
 515 }
 516
 517 /*
 518 ===================
 519 SV_ReadClientMessage
 520
 521 Returns false if the client should be killed
 522 ===================
 523 */
 524 extern void SV_SendServerinfo (client_t *client);
 525 qboolean SV_ReadClientMessage (void)
 526 {
 527         int             ret;
 528         int             cmd;
 529         char            *s;
 530
 531         do
 532         {
 533 nextmsg:
 534                 ret = NET_GetMessage (host_client->netconnection);
 535                 if (ret == -1)
 536                 {
 537                         Sys_Printf ("SV_ReadClientMessage: NET_GetMessage failed\n");
 538                         return false;
 539                 }
 540                 if (!ret)
 541                         return true;
 542
 543                 MSG_BeginReading ();
 544
 545                 while (1)
 546                 {
 547                         if (!host_client->active)
 548                                 // a command caused an error
 549                                 return false;
 550
 551                         if (msg_badread)
 552                         {
 553                                 Sys_Printf ("SV_ReadClientMessage: badread\n");
 554                                 return false;
 555                         }
 556
 557                         cmd = MSG_ReadChar ();
 558
 559 #ifndef NOROUTINGFIX
 560                         if (cmd != -1 && host_client->waitingforconnect)
 561                         {
 562                                 host_client->waitingforconnect = false;
 563                                 host_client->sendserverinfo = true;
 564                         }
 565 #endif
 566
 567                         switch (cmd)
 568                         {
 569                         case -1:
 570                                 // end of message
 571                                 goto nextmsg;
 572
 573                         default:
 574                                 Sys_Printf ("SV_ReadClientMessage: unknown command char %i\n", cmd);
 575                                 return false;
 576
 577                         case clc_nop:
 578                                 break;
 579
 580                         case clc_stringcmd:
 581                                 s = MSG_ReadString ();
 582                                 ret = 0;
 583                                 if (Q_strncasecmp(s, "status", 6) == 0
 584                                  || Q_strncasecmp(s, "name", 4) == 0
 585                                  || Q_strncasecmp(s, "say", 3) == 0
 586                                  || Q_strncasecmp(s, "say_team", 8) == 0
 587                                  || Q_strncasecmp(s, "tell", 4) == 0
 588                                  || Q_strncasecmp(s, "color", 5) == 0
 589                                  || Q_strncasecmp(s, "kill", 4) == 0
 590                                  || Q_strncasecmp(s, "pause", 5) == 0
 591                                  || Q_strncasecmp(s, "spawn", 5) == 0
 592                                  || Q_strncasecmp(s, "begin", 5) == 0
 593                                  || Q_strncasecmp(s, "prespawn", 8) == 0
 594                                  || Q_strncasecmp(s, "kick", 4) == 0
 595                                  || Q_strncasecmp(s, "ping", 4) == 0
 596                                  || Q_strncasecmp(s, "ban", 3) == 0
 597                                  || Q_strncasecmp(s, "pmodel", 6) == 0
 598                                  || (gamemode == GAME_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))
 599                                  || (gamemode != GAME_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)))
 600                                 {
 601                                         ret = 1;
 602                                         Cmd_ExecuteString (s, src_client);
 603                                 }
 604                                 else
 605                                         Con_DPrintf("%s tried to %s\n", host_client->name, s);
 606                                 break;
 607
 608                         case clc_disconnect:
 609                                 return false;
 610
 611                         case clc_move:
 612                                 SV_ReadClientMove (&host_client->cmd);
 613                                 break;
 614
 615                         case clc_ackentities:
 616                                 EntityFrame_AckFrame(&host_client->entitydatabase, MSG_ReadLong());
 617                                 break;
 618                         }
 619                 }
 620         }
 621         while (ret == 1);
 622
 623         return true;
 624 }
 625
 626
 627 /*
 628 ==================
 629 SV_RunClients
 630 ==================
 631 */
 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                         // client misbehaved...
 646                         SV_DropClient (false);
 647                         continue;
 648                 }
 649
 650                 if (!host_client->spawned)
 651                 {
 652                         // clear client movement until a new packet is received
 653                         memset (&host_client->cmd, 0, sizeof(host_client->cmd));
 654                         continue;
 655                 }
 656
 657                 if (sv.frametime)
 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