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 = {"edgefriction", "2"};
  27 cvar_t  sv_predict = {"sv_predict", "1"};
  28 cvar_t  sv_deltacompress = {"sv_deltacompress", "1"};
  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 - sv.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*sv.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*sv.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 * sv.frametime;
 221         accelspeed = sv_accelerate.value*wishspeed * sv.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         eval_t  *val;
 234
 235         len = VectorNormalizeLength (sv_player->v.punchangle);
 236
 237         len -= 10*sv.frametime;
 238         if (len < 0)
 239                 len = 0;
 240         VectorScale (sv_player->v.punchangle, len, sv_player->v.punchangle);
 241
 242         if ((val = GETEDICTFIELDVALUE(sv_player, eval_punchvector)))
 243         {
 244                 len = VectorNormalizeLength (val->vector);
 245
 246                 len -= 20*sv.frametime;
 247                 if (len < 0)
 248                         len = 0;
 249                 VectorScale (val->vector, len, val->vector);
 250         }
 251 }
 252
 253 /*
 254 ===================
 255 SV_WaterMove
 256
 257 ===================
 258 */
 259 void SV_WaterMove (void)
 260 {
 261         int             i;
 262         vec3_t  wishvel;
 263         float   speed, newspeed, wishspeed, addspeed, accelspeed, temp;
 264
 265 //
 266 // user intentions
 267 //
 268         AngleVectors (sv_player->v.v_angle, forward, right, up);
 269
 270         for (i=0 ; i<3 ; i++)
 271                 wishvel[i] = forward[i]*cmd.forwardmove + right[i]*cmd.sidemove;
 272
 273         if (!cmd.forwardmove && !cmd.sidemove && !cmd.upmove)
 274                 wishvel[2] -= 60;               // drift towards bottom
 275         else
 276                 wishvel[2] += cmd.upmove;
 277
 278         wishspeed = Length(wishvel);
 279         if (wishspeed > sv_maxspeed.value)
 280         {
 281                 temp = sv_maxspeed.value/wishspeed;
 282                 VectorScale (wishvel, temp, 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                 temp = newspeed/speed;
 297                 VectorScale (velocity, temp, velocity);
 298         }
 299         else
 300                 newspeed = 0;
 301
 302 //
 303 // water acceleration
 304 //
 305         if (!wishspeed)
 306                 return;
 307
 308         addspeed = wishspeed - newspeed;
 309         if (addspeed <= 0)
 310                 return;
 311
 312         VectorNormalize (wishvel);
 313         accelspeed = sv_accelerate.value * wishspeed * sv.frametime;
 314         if (accelspeed > addspeed)
 315                 accelspeed = addspeed;
 316
 317         for (i=0 ; i<3 ; i++)
 318                 velocity[i] += accelspeed * wishvel[i];
 319 }
 320
 321 void SV_WaterJump (void)
 322 {
 323         if (sv.time > sv_player->v.teleport_time
 324         || !sv_player->v.waterlevel)
 325         {
 326                 sv_player->v.flags = (int)sv_player->v.flags & ~FL_WATERJUMP;
 327                 sv_player->v.teleport_time = 0;
 328         }
 329         sv_player->v.velocity[0] = sv_player->v.movedir[0];
 330         sv_player->v.velocity[1] = sv_player->v.movedir[1];
 331 }
 332
 333
 334 /*
 335 ===================
 336 SV_AirMove
 337
 338 ===================
 339 */
 340 void SV_AirMove (void)
 341 {
 342         int                     i;
 343         vec3_t          wishvel;
 344         float           fmove, smove, temp;
 345
 346         // LordHavoc: correct quake movement speed bug when looking up/down
 347         wishvel[0] = wishvel[2] = 0;
 348         wishvel[1] = sv_player->v.angles[1];
 349         AngleVectors (wishvel, forward, right, up);
 350 //      AngleVectors (sv_player->v.angles, forward, right, up);
 351
 352         fmove = cmd.forwardmove;
 353         smove = cmd.sidemove;
 354
 355 // hack to not let you back into teleporter
 356         if (sv.time < sv_player->v.teleport_time && fmove < 0)
 357                 fmove = 0;
 358
 359         for (i=0 ; i<3 ; i++)
 360                 wishvel[i] = forward[i]*fmove + right[i]*smove;
 361
 362         if ( (int)sv_player->v.movetype != MOVETYPE_WALK)
 363                 wishvel[2] = cmd.upmove;
 364         else
 365                 wishvel[2] = 0;
 366
 367         VectorCopy (wishvel, wishdir);
 368         wishspeed = VectorNormalizeLength(wishdir);
 369         if (wishspeed > sv_maxspeed.value)
 370         {
 371                 temp = sv_maxspeed.value/wishspeed;
 372                 VectorScale (wishvel, temp, wishvel);
 373                 wishspeed = sv_maxspeed.value;
 374         }
 375
 376         if ( sv_player->v.movetype == MOVETYPE_NOCLIP)
 377         {       // noclip
 378                 VectorCopy (wishvel, velocity);
 379         }
 380         else if ( onground )
 381         {
 382                 SV_UserFriction ();
 383                 SV_Accelerate ();
 384         }
 385         else
 386         {       // not on ground, so little effect on velocity
 387                 SV_AirAccelerate (wishvel);
 388         }
 389 }
 390
 391 /*
 392 ===================
 393 SV_ClientThink
 394
 395 the move fields specify an intended velocity in pix/sec
 396 the angle fields specify an exact angular motion in degrees
 397 ===================
 398 */
 399 void SV_ClientThink (void)
 400 {
 401         vec3_t          v_angle;
 402
 403         if (sv_player->v.movetype == MOVETYPE_NONE)
 404                 return;
 405
 406         onground = (int)sv_player->v.flags & FL_ONGROUND;
 407
 408         origin = sv_player->v.origin;
 409         velocity = sv_player->v.velocity;
 410
 411         DropPunchAngle ();
 412
 413 //
 414 // if dead, behave differently
 415 //
 416         if (sv_player->v.health <= 0)
 417                 return;
 418
 419 //
 420 // angles
 421 // show 1/3 the pitch angle and all the roll angle
 422         cmd = host_client->cmd;
 423         angles = sv_player->v.angles;
 424
 425         VectorAdd (sv_player->v.v_angle, sv_player->v.punchangle, v_angle);
 426         angles[ROLL] = V_CalcRoll (sv_player->v.angles, sv_player->v.velocity)*4;
 427         if (!sv_player->v.fixangle)
 428         {
 429                 // LordHavoc: pitch was ugly to begin with...  removed except in water
 430                 if (sv_player->v.waterlevel >= 2)
 431                         angles[PITCH] = -v_angle[PITCH]/3;
 432                 else
 433                         angles[PITCH] = 0;
 434                 angles[YAW] = v_angle[YAW];
 435         }
 436
 437         if ( (int)sv_player->v.flags & FL_WATERJUMP )
 438         {
 439                 SV_WaterJump ();
 440                 return;
 441         }
 442 //
 443 // walk
 444 //
 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]
 470                 = sv.time - MSG_ReadFloat ();
 471         host_client->num_pings++;
 472         for (i=0, total = 0;i < NUM_PING_TIMES;i++)
 473                 total += host_client->ping_times[i];
 474         host_client->ping = total / NUM_PING_TIMES; // can be used for prediction
 475         host_client->latency = 0;
 476         if (sv_predict.value && (svs.maxclients > 1) && (!sv.paused)) // if paused or a local game, don't predict
 477                 host_client->latency = host_client->ping;
 478         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_ping)))
 479                 val->_float = host_client->ping * 1000.0;
 480
 481 // read current angles
 482         if (dpprotocol)
 483         {
 484                 for (i=0 ; i<3 ; i++)
 485                         angle[i] = MSG_ReadPreciseAngle ();
 486         }
 487         else
 488         {
 489                 for (i=0 ; i<3 ; i++)
 490                         angle[i] = MSG_ReadAngle ();
 491         }
 492
 493         VectorCopy (angle, host_client->edict->v.v_angle);
 494
 495 // read movement
 496         move->forwardmove = MSG_ReadShort ();
 497         move->sidemove = MSG_ReadShort ();
 498         move->upmove = MSG_ReadShort ();
 499         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_movement)))
 500         {
 501                 val->vector[0] = move->forwardmove;
 502                 val->vector[1] = move->sidemove;
 503                 val->vector[2] = move->upmove;
 504         }
 505
 506 // read buttons
 507         bits = MSG_ReadByte ();
 508         host_client->edict->v.button0 = bits & 1;
 509         host_client->edict->v.button2 = (bits & 2)>>1;
 510         // LordHavoc: added 6 new buttons
 511         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button3))) val->_float = ((bits >> 2) & 1);
 512         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button4))) val->_float = ((bits >> 3) & 1);
 513         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button5))) val->_float = ((bits >> 4) & 1);
 514         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button6))) val->_float = ((bits >> 5) & 1);
 515         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button7))) val->_float = ((bits >> 6) & 1);
 516         if ((val = GETEDICTFIELDVALUE(host_client->edict, eval_button8))) val->_float = ((bits >> 7) & 1);
 517
 518         i = MSG_ReadByte ();
 519         if (i)
 520                 host_client->edict->v.impulse = i;
 521 }
 522
 523 /*
 524 ===================
 525 SV_ReadClientMessage
 526
 527 Returns false if the client should be killed
 528 ===================
 529 */
 530 qboolean SV_ReadClientMessage (void)
 531 {
 532         int             ret;
 533         int             cmd;
 534         char            *s;
 535
 536         do
 537         {
 538 nextmsg:
 539                 ret = NET_GetMessage (host_client->netconnection);
 540                 if (ret == -1)
 541                 {
 542                         Sys_Printf ("SV_ReadClientMessage: NET_GetMessage failed\n");
 543                         return false;
 544                 }
 545                 if (!ret)
 546                         return true;
 547
 548                 MSG_BeginReading ();
 549
 550                 while (1)
 551                 {
 552                         if (!host_client->active)
 553                                 return false;   // a command caused an error
 554
 555                         if (msg_badread)
 556                         {
 557                                 Sys_Printf ("SV_ReadClientMessage: badread\n");
 558                                 return false;
 559                         }
 560
 561                         cmd = MSG_ReadChar ();
 562
 563                         switch (cmd)
 564                         {
 565                         case -1:
 566                                 goto nextmsg;           // end of message
 567
 568                         default:
 569                                 Sys_Printf ("SV_ReadClientMessage: unknown command char\n");
 570                                 return false;
 571
 572                         case clc_nop:
 573 //                              Sys_Printf ("clc_nop\n");
 574                                 break;
 575
 576                         case clc_stringcmd:
 577                                 s = MSG_ReadString ();
 578                                 ret = 0;
 579                                 if (Q_strncasecmp(s, "status", 6) == 0
 580                                  || Q_strncasecmp(s, "name", 4) == 0
 581                                  || Q_strncasecmp(s, "say", 3) == 0
 582                                  || Q_strncasecmp(s, "say_team", 8) == 0
 583                                  || Q_strncasecmp(s, "tell", 4) == 0
 584                                  || Q_strncasecmp(s, "color", 5) == 0
 585                                  || Q_strncasecmp(s, "kill", 4) == 0
 586                                  || Q_strncasecmp(s, "pause", 5) == 0
 587                                  || Q_strncasecmp(s, "spawn", 5) == 0
 588                                  || Q_strncasecmp(s, "begin", 5) == 0
 589                                  || Q_strncasecmp(s, "prespawn", 8) == 0
 590                                  || Q_strncasecmp(s, "kick", 4) == 0
 591                                  || Q_strncasecmp(s, "ping", 4) == 0
 592                                  || Q_strncasecmp(s, "ban", 3) == 0
 593                                  || Q_strncasecmp(s, "pmodel", 6) == 0
 594                                  || (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))
 595                                  || (!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)))
 596                                 {
 597                                         ret = 1;
 598                                         Cmd_ExecuteString (s, src_client);
 599                                 }
 600                                 else
 601                                         Con_DPrintf("%s tried to %s\n", host_client->name, s);
 602                                 /*
 603                                 if (ret == 2)
 604                                         Cbuf_InsertText (s);
 605                                 else if (ret == 1)
 606                                         Cmd_ExecuteString (s, src_client);
 607                                 else
 608                                         Con_DPrintf("%s tried to %s\n", host_client->name, s);
 609                                 */
 610                                 break;
 611
 612                         case clc_disconnect:
 613 //                              Sys_Printf ("SV_ReadClientMessage: client disconnected\n");
 614                                 return false;
 615
 616                         case clc_move:
 617                                 SV_ReadClientMove (&host_client->cmd);
 618                                 break;
 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                         SV_DropClient (false);  // client misbehaved...
 646                         continue;
 647                 }
 648
 649                 if (!host_client->spawned)
 650                 {
 651                 // clear client movement until a new packet is received
 652                         memset (&host_client->cmd, 0, sizeof(host_client->cmd));
 653                         continue;
 654                 }
 655
 656 // always pause in single player if in console or menus
 657                 if (!sv.paused && (svs.maxclients > 1 || key_dest == key_game) )
 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