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 - host_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*host_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*host_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 * host_frametime;
 222         accelspeed = sv_accelerate.value*wishspeed * host_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
 235         len = VectorNormalizeLength (sv_player->v.punchangle);
 236
 237         len -= 10*host_frametime;
 238         if (len < 0)
 239                 len = 0;
 240         VectorScale (sv_player->v.punchangle, len, sv_player->v.punchangle);
 241 }
 242
 243 /*
 244 ===================
 245 SV_WaterMove
 246
 247 ===================
 248 */
 249 void SV_WaterMove (void)
 250 {
 251         int             i;
 252         vec3_t  wishvel;
 253         float   speed, newspeed, wishspeed, addspeed, accelspeed;
 254
 255 //
 256 // user intentions
 257 //
 258         AngleVectors (sv_player->v.v_angle, forward, right, up);
 259
 260         for (i=0 ; i<3 ; i++)
 261                 wishvel[i] = forward[i]*cmd.forwardmove + right[i]*cmd.sidemove;
 262
 263         if (!cmd.forwardmove && !cmd.sidemove && !cmd.upmove)
 264                 wishvel[2] -= 60;               // drift towards bottom
 265         else
 266                 wishvel[2] += cmd.upmove;
 267
 268         wishspeed = Length(wishvel);
 269         if (wishspeed > sv_maxspeed.value)
 270         {
 271                 VectorScale (wishvel, sv_maxspeed.value/wishspeed, wishvel);
 272                 wishspeed = sv_maxspeed.value;
 273         }
 274         wishspeed *= 0.7;
 275
 276 //
 277 // water friction
 278 //
 279         speed = Length (velocity);
 280         if (speed)
 281         {
 282                 newspeed = speed - host_frametime * speed * sv_friction.value;
 283                 if (newspeed < 0)
 284                         newspeed = 0;
 285                 VectorScale (velocity, newspeed/speed, velocity);
 286         }
 287         else
 288                 newspeed = 0;
 289
 290 //
 291 // water acceleration
 292 //
 293         if (!wishspeed)
 294                 return;
 295
 296         addspeed = wishspeed - newspeed;
 297         if (addspeed <= 0)
 298                 return;
 299
 300         VectorNormalize (wishvel);
 301         accelspeed = sv_accelerate.value * wishspeed * host_frametime;
 302         if (accelspeed > addspeed)
 303                 accelspeed = addspeed;
 304
 305         for (i=0 ; i<3 ; i++)
 306                 velocity[i] += accelspeed * wishvel[i];
 307 }
 308
 309 void SV_WaterJump (void)
 310 {
 311         if (sv.time > sv_player->v.teleport_time
 312         || !sv_player->v.waterlevel)
 313         {
 314                 sv_player->v.flags = (int)sv_player->v.flags & ~FL_WATERJUMP;
 315                 sv_player->v.teleport_time = 0;
 316         }
 317         sv_player->v.velocity[0] = sv_player->v.movedir[0];
 318         sv_player->v.velocity[1] = sv_player->v.movedir[1];
 319 }
 320
 321
 322 /*
 323 ===================
 324 SV_AirMove
 325
 326 ===================
 327 */
 328 void SV_AirMove (void)
 329 {
 330         int                     i;
 331         vec3_t          wishvel;
 332         float           fmove, smove;
 333
 334         // LordHavoc: correct quake movement speed bug when looking up/down
 335         wishvel[0] = wishvel[2] = 0;
 336         wishvel[1] = sv_player->v.angles[1];
 337         AngleVectors (wishvel, forward, right, up);
 338 //      AngleVectors (sv_player->v.angles, forward, right, up);
 339
 340         fmove = cmd.forwardmove;
 341         smove = cmd.sidemove;
 342
 343 // hack to not let you back into teleporter
 344         if (sv.time < sv_player->v.teleport_time && fmove < 0)
 345                 fmove = 0;
 346
 347         for (i=0 ; i<3 ; i++)
 348                 wishvel[i] = forward[i]*fmove + right[i]*smove;
 349
 350         if ( (int)sv_player->v.movetype != MOVETYPE_WALK)
 351                 wishvel[2] = cmd.upmove;
 352         else
 353                 wishvel[2] = 0;
 354
 355         VectorCopy (wishvel, wishdir);
 356         wishspeed = VectorNormalizeLength(wishdir);
 357         if (wishspeed > sv_maxspeed.value)
 358         {
 359                 VectorScale (wishvel, sv_maxspeed.value/wishspeed, wishvel);
 360                 wishspeed = sv_maxspeed.value;
 361         }
 362
 363         if ( sv_player->v.movetype == MOVETYPE_NOCLIP)
 364         {       // noclip
 365                 VectorCopy (wishvel, velocity);
 366         }
 367         else if ( onground )
 368         {
 369                 SV_UserFriction ();
 370                 SV_Accelerate ();
 371         }
 372         else
 373         {       // not on ground, so little effect on velocity
 374                 SV_AirAccelerate (wishvel);
 375         }
 376 }
 377
 378 /*
 379 ===================
 380 SV_ClientThink
 381
 382 the move fields specify an intended velocity in pix/sec
 383 the angle fields specify an exact angular motion in degrees
 384 ===================
 385 */
 386 void SV_ClientThink (void)
 387 {
 388         vec3_t          v_angle;
 389
 390         if (sv_player->v.movetype == MOVETYPE_NONE)
 391                 return;
 392
 393         onground = (int)sv_player->v.flags & FL_ONGROUND;
 394
 395         origin = sv_player->v.origin;
 396         velocity = sv_player->v.velocity;
 397
 398         DropPunchAngle ();
 399
 400 //
 401 // if dead, behave differently
 402 //
 403         if (sv_player->v.health <= 0)
 404                 return;
 405
 406 //
 407 // angles
 408 // show 1/3 the pitch angle and all the roll angle
 409         cmd = host_client->cmd;
 410         angles = sv_player->v.angles;
 411
 412         VectorAdd (sv_player->v.v_angle, sv_player->v.punchangle, v_angle);
 413         angles[ROLL] = V_CalcRoll (sv_player->v.angles, sv_player->v.velocity)*4;
 414         if (!sv_player->v.fixangle)
 415         {
 416                 // LordHavoc: pitch was ugly to begin with...  removed except in water
 417                 if (sv_player->v.waterlevel >= 2)
 418                         angles[PITCH] = -v_angle[PITCH]/3;
 419                 else
 420                         angles[PITCH] = 0;
 421                 angles[YAW] = v_angle[YAW];
 422         }
 423
 424         if ( (int)sv_player->v.flags & FL_WATERJUMP )
 425         {
 426                 SV_WaterJump ();
 427                 return;
 428         }
 429 //
 430 // walk
 431 //
 432         if ( (sv_player->v.waterlevel >= 2)
 433         && (sv_player->v.movetype != MOVETYPE_NOCLIP) )
 434         {
 435                 SV_WaterMove ();
 436                 return;
 437         }
 438
 439         SV_AirMove ();
 440 }
 441
 442
 443 /*
 444 ===================
 445 SV_ReadClientMove
 446 ===================
 447 */
 448 void SV_ReadClientMove (usercmd_t *move)
 449 {
 450         int             i;
 451         vec3_t  angle;
 452         int             bits;
 453         eval_t  *val;
 454         float   total;
 455
 456 // read ping time
 457         host_client->ping_times[host_client->num_pings%NUM_PING_TIMES]
 458                 = sv.time - MSG_ReadFloat ();
 459         host_client->num_pings++;
 460         for (i=0, total = 0;i < NUM_PING_TIMES;i++)
 461                 total += host_client->ping_times[i];
 462         host_client->ping = total / NUM_PING_TIMES; // can be used for prediction
 463         host_client->latency = 0;
 464         if (sv_predict.value && (svs.maxclients > 1) && (!sv.paused)) // if paused or a local game, don't predict
 465                 host_client->latency = host_client->ping;
 466         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_ping)))
 467                 val->_float = host_client->ping * 1000.0;
 468
 469 // read current angles
 470         if (dpprotocol)
 471         {
 472                 for (i=0 ; i<3 ; i++)
 473                         angle[i] = MSG_ReadPreciseAngle ();
 474         }
 475         else
 476         {
 477                 for (i=0 ; i<3 ; i++)
 478                         angle[i] = MSG_ReadAngle ();
 479         }
 480
 481         VectorCopy (angle, host_client->edict->v.v_angle);
 482
 483 // read movement
 484         move->forwardmove = MSG_ReadShort ();
 485         move->sidemove = MSG_ReadShort ();
 486         move->upmove = MSG_ReadShort ();
 487         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_movement)))
 488         {
 489                 val->vector[0] = move->forwardmove;
 490                 val->vector[1] = move->sidemove;
 491                 val->vector[2] = move->upmove;
 492         }
 493
 494 // read buttons
 495         bits = MSG_ReadByte ();
 496         host_client->edict->v.button0 = bits & 1;
 497         host_client->edict->v.button2 = (bits & 2)>>1;
 498         // LordHavoc: added 6 new buttons
 499         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button3))) val->_float = ((bits >> 2) & 1);
 500         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button4))) val->_float = ((bits >> 3) & 1);
 501         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button5))) val->_float = ((bits >> 4) & 1);
 502         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button6))) val->_float = ((bits >> 5) & 1);
 503         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button7))) val->_float = ((bits >> 6) & 1);
 504         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button8))) val->_float = ((bits >> 7) & 1);
 505
 506         i = MSG_ReadByte ();
 507         if (i)
 508                 host_client->edict->v.impulse = i;
 509 }
 510
 511 /*
 512 ===================
 513 SV_ReadClientMessage
 514
 515 Returns false if the client should be killed
 516 ===================
 517 */
 518 qboolean SV_ReadClientMessage (void)
 519 {
 520         int             ret;
 521         int             cmd;
 522         char            *s;
 523
 524         do
 525         {
 526 nextmsg:
 527                 ret = NET_GetMessage (host_client->netconnection);
 528                 if (ret == -1)
 529                 {
 530                         Sys_Printf ("SV_ReadClientMessage: NET_GetMessage failed\n");
 531                         return false;
 532                 }
 533                 if (!ret)
 534                         return true;
 535
 536                 MSG_BeginReading ();
 537
 538                 while (1)
 539                 {
 540                         if (!host_client->active)
 541                                 return false;   // a command caused an error
 542
 543                         if (msg_badread)
 544                         {
 545                                 Sys_Printf ("SV_ReadClientMessage: badread\n");
 546                                 return false;
 547                         }
 548
 549                         cmd = MSG_ReadChar ();
 550
 551                         switch (cmd)
 552                         {
 553                         case -1:
 554                                 goto nextmsg;           // end of message
 555
 556                         default:
 557                                 Sys_Printf ("SV_ReadClientMessage: unknown command char\n");
 558                                 return false;
 559
 560                         case clc_nop:
 561 //                              Sys_Printf ("clc_nop\n");
 562                                 break;
 563
 564                         case clc_stringcmd:
 565                                 s = MSG_ReadString ();
 566                                 ret = 0;
 567                                 if (Q_strncasecmp(s, "status", 6) == 0
 568                                  || Q_strncasecmp(s, "name", 4) == 0
 569                                  || Q_strncasecmp(s, "say", 3) == 0
 570                                  || Q_strncasecmp(s, "say_team", 8) == 0
 571                                  || Q_strncasecmp(s, "tell", 4) == 0
 572                                  || Q_strncasecmp(s, "color", 5) == 0
 573                                  || Q_strncasecmp(s, "kill", 4) == 0
 574                                  || Q_strncasecmp(s, "pause", 5) == 0
 575                                  || Q_strncasecmp(s, "spawn", 5) == 0
 576                                  || Q_strncasecmp(s, "begin", 5) == 0
 577                                  || Q_strncasecmp(s, "prespawn", 8) == 0
 578                                  || Q_strncasecmp(s, "kick", 4) == 0
 579                                  || Q_strncasecmp(s, "ping", 4) == 0
 580                                  || Q_strncasecmp(s, "ban", 3) == 0
 581                                  || Q_strncasecmp(s, "pmodel", 6) == 0
 582                                  || (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))
 583                                  || (!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)))
 584                                 {
 585                                         ret = 1;
 586                                         Cmd_ExecuteString (s, src_client);
 587                                 }
 588                                 else
 589                                         Con_DPrintf("%s tried to %s\n", host_client->name, s);
 590                                 /*
 591                                 if (ret == 2)
 592                                         Cbuf_InsertText (s);
 593                                 else if (ret == 1)
 594                                         Cmd_ExecuteString (s, src_client);
 595                                 else
 596                                         Con_DPrintf("%s tried to %s\n", host_client->name, s);
 597                                 */
 598                                 break;
 599
 600                         case clc_disconnect:
 601 //                              Sys_Printf ("SV_ReadClientMessage: client disconnected\n");
 602                                 return false;
 603
 604                         case clc_move:
 605                                 SV_ReadClientMove (&host_client->cmd);
 606                                 break;
 607                         }
 608                 }
 609         } while (ret == 1);
 610
 611         return true;
 612 }
 613
 614
 615 /*
 616 ==================
 617 SV_RunClients
 618 ==================
 619 */
 620 extern dfunction_t *SV_PlayerPhysicsQC;
 621 void SV_RunClients (void)
 622 {
 623         int                             i;
 624
 625         for (i=0, host_client = svs.clients ; i<svs.maxclients ; i++, host_client++)
 626         {
 627                 if (!host_client->active)
 628                         continue;
 629
 630                 sv_player = host_client->edict;
 631
 632                 if (!SV_ReadClientMessage ())
 633                 {
 634                         SV_DropClient (false);  // client misbehaved...
 635                         continue;
 636                 }
 637
 638                 if (!host_client->spawned)
 639                 {
 640                 // clear client movement until a new packet is received
 641                         memset (&host_client->cmd, 0, sizeof(host_client->cmd));
 642                         continue;
 643                 }
 644
 645 // always pause in single player if in console or menus
 646                 if (!sv.paused && (svs.maxclients > 1 || key_dest == key_game) )
 647                 {
 648                         // LordHavoc: QuakeC replacement for SV_ClientThink (player movement)
 649                         if (SV_PlayerPhysicsQC)
 650                         {
 651                                 pr_global_struct->time = sv.time;
 652                                 pr_global_struct->self = EDICT_TO_PROG(sv_player);
 653                                 PR_ExecuteProgram ((func_t)(SV_PlayerPhysicsQC - pr_functions), "");
 654                         }
 655                         else
 656                                 SV_ClientThink ();
 657                 }
 658         }
 659 }
 660