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_deltacompress = {0, "sv_deltacompress", "1"};
  28 cvar_t sv_idealpitchscale = {0, "sv_idealpitchscale","0.8"};
  29 cvar_t sv_maxspeed = {CVAR_NOTIFY, "sv_maxspeed", "320"};
  30 cvar_t sv_accelerate = {0, "sv_accelerate", "10"};
  31
  32 static usercmd_t cmd;
  33
  34
  35 /*
  36 ===============
  37 SV_SetIdealPitch
  38 ===============
  39 */
  40 #define MAX_FORWARD     6
  41 void SV_SetIdealPitch (void)
  42 {
  43         float   angleval, sinval, cosval;
  44         trace_t tr;
  45         vec3_t  top, bottom;
  46         float   z[MAX_FORWARD];
  47         int             i, j;
  48         int             step, dir, steps;
  49
  50         if (!((int)sv_player->v->flags & FL_ONGROUND))
  51                 return;
  52
  53         angleval = sv_player->v->angles[YAW] * M_PI*2 / 360;
  54         sinval = sin(angleval);
  55         cosval = cos(angleval);
  56
  57         for (i=0 ; i<MAX_FORWARD ; i++)
  58         {
  59                 top[0] = sv_player->v->origin[0] + cosval*(i+3)*12;
  60                 top[1] = sv_player->v->origin[1] + sinval*(i+3)*12;
  61                 top[2] = sv_player->v->origin[2] + sv_player->v->view_ofs[2];
  62
  63                 bottom[0] = top[0];
  64                 bottom[1] = top[1];
  65                 bottom[2] = top[2] - 160;
  66
  67                 tr = SV_Move (top, vec3_origin, vec3_origin, bottom, MOVE_NOMONSTERS, sv_player);
  68                 // if looking at a wall, leave ideal the way is was
  69                 if (tr.startsolid)
  70                         return;
  71
  72                 // near a dropoff
  73                 if (tr.fraction == 1)
  74                         return;
  75
  76                 z[i] = top[2] + tr.fraction*(bottom[2]-top[2]);
  77         }
  78
  79         dir = 0;
  80         steps = 0;
  81         for (j=1 ; j<i ; j++)
  82         {
  83                 step = z[j] - z[j-1];
  84                 if (step > -ON_EPSILON && step < ON_EPSILON)
  85                         continue;
  86
  87                 // mixed changes
  88                 if (dir && ( step-dir > ON_EPSILON || step-dir < -ON_EPSILON ) )
  89                         return;
  90
  91                 steps++;
  92                 dir = step;
  93         }
  94
  95         if (!dir)
  96         {
  97                 sv_player->v->idealpitch = 0;
  98                 return;
  99         }
 100
 101         if (steps < 2)
 102                 return;
 103         sv_player->v->idealpitch = -dir * sv_idealpitchscale.value;
 104 }
 105
 106 #if 1
 107 static vec3_t wishdir, forward, right, up;
 108 static float wishspeed;
 109
 110 static qboolean onground;
 111
 112 /*
 113 ==================
 114 SV_UserFriction
 115
 116 ==================
 117 */
 118 void SV_UserFriction (void)
 119 {
 120         float speed, newspeed, control, friction;
 121         vec3_t start, stop;
 122         trace_t trace;
 123
 124         speed = sqrt(sv_player->v->velocity[0]*sv_player->v->velocity[0]+sv_player->v->velocity[1]*sv_player->v->velocity[1]);
 125         if (!speed)
 126                 return;
 127
 128         // if the leading edge is over a dropoff, increase friction
 129         start[0] = stop[0] = sv_player->v->origin[0] + sv_player->v->velocity[0]/speed*16;
 130         start[1] = stop[1] = sv_player->v->origin[1] + sv_player->v->velocity[1]/speed*16;
 131         start[2] = sv_player->v->origin[2] + sv_player->v->mins[2];
 132         stop[2] = start[2] - 34;
 133
 134         trace = SV_Move (start, vec3_origin, vec3_origin, stop, MOVE_NOMONSTERS, sv_player);
 135
 136         if (trace.fraction == 1.0)
 137                 friction = sv_friction.value*sv_edgefriction.value;
 138         else
 139                 friction = sv_friction.value;
 140
 141         // apply friction
 142         control = speed < sv_stopspeed.value ? sv_stopspeed.value : speed;
 143         newspeed = speed - sv.frametime*control*friction;
 144
 145         if (newspeed < 0)
 146                 newspeed = 0;
 147         else
 148                 newspeed /= speed;
 149
 150         VectorScale(sv_player->v->velocity, newspeed, sv_player->v->velocity);
 151 }
 152
 153 /*
 154 ==============
 155 SV_Accelerate
 156 ==============
 157 */
 158 void SV_Accelerate (void)
 159 {
 160         int i;
 161         float addspeed, accelspeed, currentspeed;
 162
 163         currentspeed = DotProduct (sv_player->v->velocity, wishdir);
 164         addspeed = wishspeed - currentspeed;
 165         if (addspeed <= 0)
 166                 return;
 167         accelspeed = sv_accelerate.value*sv.frametime*wishspeed;
 168         if (accelspeed > addspeed)
 169                 accelspeed = addspeed;
 170
 171         for (i=0 ; i<3 ; i++)
 172                 sv_player->v->velocity[i] += accelspeed*wishdir[i];
 173 }
 174
 175 void SV_AirAccelerate (vec3_t wishveloc)
 176 {
 177         int i;
 178         float addspeed, wishspd, accelspeed, currentspeed;
 179
 180         wishspd = VectorNormalizeLength (wishveloc);
 181         if (wishspd > 30)
 182                 wishspd = 30;
 183         currentspeed = DotProduct (sv_player->v->velocity, wishveloc);
 184         addspeed = wishspd - currentspeed;
 185         if (addspeed <= 0)
 186                 return;
 187         accelspeed = sv_accelerate.value*wishspeed * sv.frametime;
 188         if (accelspeed > addspeed)
 189                 accelspeed = addspeed;
 190
 191         for (i=0 ; i<3 ; i++)
 192                 sv_player->v->velocity[i] += accelspeed*wishveloc[i];
 193 }
 194
 195
 196 void DropPunchAngle (void)
 197 {
 198         float len;
 199         eval_t *val;
 200
 201         len = VectorNormalizeLength (sv_player->v->punchangle);
 202
 203         len -= 10*sv.frametime;
 204         if (len < 0)
 205                 len = 0;
 206         VectorScale (sv_player->v->punchangle, len, sv_player->v->punchangle);
 207
 208         if ((val = GETEDICTFIELDVALUE(sv_player, eval_punchvector)))
 209         {
 210                 len = VectorNormalizeLength (val->vector);
 211
 212                 len -= 20*sv.frametime;
 213                 if (len < 0)
 214                         len = 0;
 215                 VectorScale (val->vector, len, val->vector);
 216         }
 217 }
 218
 219 /*
 220 ===================
 221 SV_FreeMove
 222 ===================
 223 */
 224 void SV_FreeMove (void)
 225 {
 226         int i;
 227         float wishspeed;
 228
 229         AngleVectors (sv_player->v->v_angle, forward, right, up);
 230
 231         for (i = 0; i < 3; i++)
 232                 sv_player->v->velocity[i] = forward[i] * cmd.forwardmove + right[i] * cmd.sidemove;
 233
 234         sv_player->v->velocity[2] += cmd.upmove;
 235
 236         wishspeed = VectorLength(sv_player->v->velocity);
 237         if (wishspeed > sv_maxspeed.value)
 238                 VectorScale(sv_player->v->velocity, sv_maxspeed.value / wishspeed, sv_player->v->velocity);
 239 }
 240
 241 /*
 242 ===================
 243 SV_WaterMove
 244
 245 ===================
 246 */
 247 void SV_WaterMove (void)
 248 {
 249         int i;
 250         vec3_t wishvel;
 251         float speed, newspeed, wishspeed, addspeed, accelspeed, temp;
 252
 253         // user intentions
 254         AngleVectors (sv_player->v->v_angle, forward, right, up);
 255
 256         for (i=0 ; i<3 ; i++)
 257                 wishvel[i] = forward[i]*cmd.forwardmove + right[i]*cmd.sidemove;
 258
 259         if (!cmd.forwardmove && !cmd.sidemove && !cmd.upmove)
 260                 wishvel[2] -= 60;               // drift towards bottom
 261         else
 262                 wishvel[2] += cmd.upmove;
 263
 264         wishspeed = VectorLength(wishvel);
 265         if (wishspeed > sv_maxspeed.value)
 266         {
 267                 temp = sv_maxspeed.value/wishspeed;
 268                 VectorScale (wishvel, temp, wishvel);
 269                 wishspeed = sv_maxspeed.value;
 270         }
 271         wishspeed *= 0.7;
 272
 273         // water friction
 274         speed = VectorLength(sv_player->v->velocity);
 275         if (speed)
 276         {
 277                 newspeed = speed - sv.frametime * speed * sv_friction.value;
 278                 if (newspeed < 0)
 279                         newspeed = 0;
 280                 temp = newspeed/speed;
 281                 VectorScale(sv_player->v->velocity, temp, sv_player->v->velocity);
 282         }
 283         else
 284                 newspeed = 0;
 285
 286         // water acceleration
 287         if (!wishspeed)
 288                 return;
 289
 290         addspeed = wishspeed - newspeed;
 291         if (addspeed <= 0)
 292                 return;
 293
 294         VectorNormalize (wishvel);
 295         accelspeed = sv_accelerate.value * wishspeed * sv.frametime;
 296         if (accelspeed > addspeed)
 297                 accelspeed = addspeed;
 298
 299         for (i=0 ; i<3 ; i++)
 300                 sv_player->v->velocity[i] += accelspeed * wishvel[i];
 301 }
 302
 303 void SV_WaterJump (void)
 304 {
 305         if (sv.time > sv_player->v->teleport_time || !sv_player->v->waterlevel)
 306         {
 307                 sv_player->v->flags = (int)sv_player->v->flags & ~FL_WATERJUMP;
 308                 sv_player->v->teleport_time = 0;
 309         }
 310         sv_player->v->velocity[0] = sv_player->v->movedir[0];
 311         sv_player->v->velocity[1] = sv_player->v->movedir[1];
 312 }
 313
 314
 315 /*
 316 ===================
 317 SV_AirMove
 318
 319 ===================
 320 */
 321 void SV_AirMove (void)
 322 {
 323         int i;
 324         vec3_t wishvel;
 325         float fmove, smove, temp;
 326
 327         // LordHavoc: correct quake movement speed bug when looking up/down
 328         wishvel[0] = wishvel[2] = 0;
 329         wishvel[1] = sv_player->v->angles[1];
 330         AngleVectors (wishvel, forward, right, up);
 331
 332         fmove = cmd.forwardmove;
 333         smove = cmd.sidemove;
 334
 335 // hack to not let you back into teleporter
 336         if (sv.time < sv_player->v->teleport_time && fmove < 0)
 337                 fmove = 0;
 338
 339         for (i=0 ; i<3 ; i++)
 340                 wishvel[i] = forward[i]*fmove + right[i]*smove;
 341
 342         if ((int)sv_player->v->movetype != MOVETYPE_WALK)
 343                 wishvel[2] += cmd.upmove;
 344
 345         VectorCopy (wishvel, wishdir);
 346         wishspeed = VectorNormalizeLength(wishdir);
 347         if (wishspeed > sv_maxspeed.value)
 348         {
 349                 temp = sv_maxspeed.value/wishspeed;
 350                 VectorScale (wishvel, temp, wishvel);
 351                 wishspeed = sv_maxspeed.value;
 352         }
 353
 354         if (sv_player->v->movetype == MOVETYPE_NOCLIP)
 355         {
 356                 // noclip
 357                 VectorCopy (wishvel, sv_player->v->velocity);
 358         }
 359         else if ( onground )
 360         {
 361                 SV_UserFriction ();
 362                 SV_Accelerate ();
 363         }
 364         else
 365         {
 366                 // not on ground, so little effect on velocity
 367                 SV_AirAccelerate (wishvel);
 368         }
 369 }
 370
 371 /*
 372 ===================
 373 SV_ClientThink
 374
 375 the move fields specify an intended velocity in pix/sec
 376 the angle fields specify an exact angular motion in degrees
 377 ===================
 378 */
 379 void SV_ClientThink (void)
 380 {
 381         vec3_t v_angle;
 382
 383         if (sv_player->v->movetype == MOVETYPE_NONE)
 384                 return;
 385
 386         onground = (int)sv_player->v->flags & FL_ONGROUND;
 387
 388         DropPunchAngle ();
 389
 390         // if dead, behave differently
 391         if (sv_player->v->health <= 0)
 392                 return;
 393
 394         cmd = host_client->cmd;
 395
 396         // angles
 397         // show 1/3 the pitch angle and all the roll angle
 398         VectorAdd (sv_player->v->v_angle, sv_player->v->punchangle, v_angle);
 399         sv_player->v->angles[ROLL] = V_CalcRoll (sv_player->v->angles, sv_player->v->velocity)*4;
 400         if (!sv_player->v->fixangle)
 401         {
 402                 sv_player->v->angles[PITCH] = -v_angle[PITCH]/3;
 403                 sv_player->v->angles[YAW] = v_angle[YAW];
 404         }
 405
 406         if ( (int)sv_player->v->flags & FL_WATERJUMP )
 407         {
 408                 SV_WaterJump ();
 409                 return;
 410         }
 411
 412         /*
 413         // Player is (somehow) outside of the map, or flying, or noclipping
 414         if (sv_player->v->movetype != MOVETYPE_NOCLIP && (sv_player->v->movetype == MOVETYPE_FLY || SV_TestEntityPosition (sv_player)))
 415         //if (sv_player->v->movetype == MOVETYPE_NOCLIP || sv_player->v->movetype == MOVETYPE_FLY || SV_TestEntityPosition (sv_player))
 416         {
 417                 SV_FreeMove ();
 418                 return;
 419         }
 420         */
 421
 422         // walk
 423         if ((sv_player->v->waterlevel >= 2) && (sv_player->v->movetype != MOVETYPE_NOCLIP))
 424         {
 425                 SV_WaterMove ();
 426                 return;
 427         }
 428
 429         SV_AirMove ();
 430 }
 431
 432 #else
 433
 434 extern cvar_t cl_rollspeed;
 435 extern cvar_t cl_rollangle;
 436 void SV_ClientThink(void)
 437 {
 438         int j;
 439         vec3_t wishvel, wishdir, v, v_forward, v_right, v_up, start, stop;
 440         float wishspeed, f, limit;
 441         trace_t trace;
 442
 443         if (sv_player->v->movetype == MOVETYPE_NONE)
 444                 return;
 445
 446         f = DotProduct(sv_player->v->punchangle, sv_player->v->punchangle);
 447         if (f)
 448         {
 449                 limit = sqrt(f);
 450                 f = (limit - 10 * sv.frametime);
 451                 f /= limit;
 452                 f = max(0, f);
 453                 VectorScale(sv_player->v->punchangle, f, sv_player->v->punchangle);
 454         }
 455
 456         // if dead, behave differently
 457         if (sv_player->v->health <= 0)
 458                 return;
 459
 460         AngleVectors(sv_player->v->v_angle, v_forward, v_right, v_up);
 461         // show 1/3 the pitch angle and all the roll angle
 462         f = DotProduct(sv_player->v->velocity, v_right) * (1.0 / cl_rollspeed.value);
 463         sv_player->v->angles[2] = bound(-1, f, 1) * cl_rollangle.value * 4;
 464         if (!sv_player->v->fixangle)
 465         {
 466                 sv_player->v->angles[0] = (sv_player->v->v_angle[0] + sv_player->v->punchangle[0]) * -0.333;
 467                 sv_player->v->angles[1] = sv_player->v->v_angle[1] + sv_player->v->punchangle[1];
 468         }
 469
 470         if ((int)sv_player->v->flags & FL_WATERJUMP)
 471         {
 472                 sv_player->v->velocity[0] = sv_player->v->movedir[0];
 473                 sv_player->v->velocity[1] = sv_player->v->movedir[1];
 474                 if (sv.time > sv_player->v->teleport_time || sv_player->v->waterlevel == 0)
 475                 {
 476                         sv_player->v->flags = (int)sv_player->v->flags - ((int)sv_player->v->flags & FL_WATERJUMP);
 477                         sv_player->v->teleport_time = 0;
 478                 }
 479                 return;
 480         }
 481
 482         // swim
 483         if (sv_player->v->waterlevel >= 2)
 484         if (sv_player->v->movetype != MOVETYPE_NOCLIP)
 485         {
 486                 if (host_client->cmd.forwardmove == 0 && host_client->cmd.sidemove == 0 && host_client->cmd.upmove == 0)
 487                 {
 488                         // drift towards bottom
 489                         wishvel[0] = 0;
 490                         wishvel[1] = 0;
 491                         wishvel[2] = -60;
 492                 }
 493                 else
 494                 {
 495                         for (j = 0;j < 3;j++)
 496                                 wishvel[j] = v_forward[j] * host_client->cmd.forwardmove + v_right[j] * host_client->cmd.sidemove;
 497                         wishvel[2] += host_client->cmd.upmove;
 498                 }
 499
 500                 wishspeed = VectorLength(wishvel);
 501                 wishspeed = min(wishspeed, sv_maxspeed.value) * 0.7;
 502
 503                 // water friction
 504                 f = VectorLength(sv_player->v->velocity) * (1 - sv.frametime * sv_friction.value);
 505                 if (f > 0)
 506                         f /= VectorLength(sv_player->v->velocity);
 507                 else
 508                         f = 0;
 509                 VectorScale(sv_player->v->velocity, f, sv_player->v->velocity);
 510
 511                 // water acceleration
 512                 if (wishspeed <= f)
 513                         return;
 514
 515                 f = wishspeed - f;
 516                 limit = sv_accelerate.value * wishspeed * sv.frametime;
 517                 if (f > limit)
 518                         f = limit;
 519                 limit = VectorLength(wishvel);
 520                 if (limit)
 521                         f /= limit;
 522                 VectorMA(sv_player->v->velocity, f, wishvel, sv_player->v->velocity);
 523                 return;
 524         }
 525
 526         // if not flying, move horizontally only
 527         if (sv_player->v->movetype != MOVETYPE_FLY)
 528         {
 529                 VectorClear(wishvel);
 530                 wishvel[1] = sv_player->v->v_angle[1];
 531                 AngleVectors(wishvel, v_forward, v_right, v_up);
 532         }
 533
 534         // hack to not let you back into teleporter
 535         VectorScale(v_right, host_client->cmd.sidemove, wishvel);
 536         if (sv.time >= sv_player->v->teleport_time || host_client->cmd.forwardmove > 0)
 537                 VectorMA(wishvel, host_client->cmd.forwardmove, v_forward, wishvel);
 538         if (sv_player->v->movetype != MOVETYPE_WALK)
 539                 wishvel[2] += cmd.upmove;
 540
 541         VectorCopy(wishvel, wishdir);
 542         VectorNormalize(wishdir);
 543         wishspeed = VectorLength(wishvel);
 544         if (wishspeed > sv_maxspeed.value)
 545                 wishspeed = sv_maxspeed.value;
 546
 547         if (sv_player->v->movetype == MOVETYPE_NOCLIP || sv_player->v->movetype == MOVETYPE_FLY)
 548         {
 549                 VectorScale(wishdir, wishspeed, sv_player->v->velocity);
 550                 return;
 551         }
 552
 553         if ((int)sv_player->v->flags & FL_ONGROUND) // walking
 554         {
 555                 // friction
 556                 f = sv_player->v->velocity[0] * sv_player->v->velocity[0] + sv_player->v->velocity[1] * sv_player->v->velocity[1];
 557                 if (f)
 558                 {
 559                         f = sqrt(f);
 560                         VectorCopy(sv_player->v->velocity, v);
 561                         v[2] = 0;
 562
 563                         // if the leading edge is over a dropoff, increase friction
 564                         limit = 16.0f / f;
 565                         VectorMA(sv_player->v->origin, limit, v, v);
 566                         v[2] += sv_player->v->mins[2];
 567
 568                         VectorCopy(v, start);
 569                         VectorCopy(v, stop);
 570                         stop[2] -= 34;
 571                         trace = SV_Move(start, vec3_origin, vec3_origin, stop, MOVE_NOMONSTERS, sv_player);
 572
 573                         // apply friction
 574                         if (f < sv_stopspeed.value)
 575                                 f = sv_stopspeed.value / f;
 576                         else
 577                                 f = 1;
 578                         if (trace.fraction == 1)
 579                                 f *= sv_edgefriction.value;
 580                         f = 1 - sv.frametime * f * sv_friction.value;
 581
 582                         if (f < 0)
 583                                 f = 0;
 584                         VectorScale(sv_player->v->velocity, f, sv_player->v->velocity);
 585                 }
 586         }
 587         else // airborn
 588                 wishspeed = min(wishspeed, 30);
 589
 590         // ground or air acceleration
 591         f = wishspeed - DotProduct(sv_player->v->velocity, wishdir);
 592         if (f > 0)
 593         {
 594                 limit = sv_accelerate.value * sv.frametime * wishspeed;
 595                 if (f > limit)
 596                         f = limit;
 597                 VectorMA(sv_player->v->velocity, f, wishdir, sv_player->v->velocity);
 598         }
 599 }
 600 #endif
 601
 602 /*
 603 ===================
 604 SV_ReadClientMove
 605 ===================
 606 */
 607 void SV_ReadClientMove (usercmd_t *move)
 608 {
 609         int i;
 610         vec3_t angle;
 611         int bits;
 612         eval_t *val;
 613         float total;
 614
 615         // read ping time
 616         host_client->ping_times[host_client->num_pings % NUM_PING_TIMES] = sv.time - MSG_ReadFloat ();
 617         host_client->num_pings++;
 618         for (i=0, total = 0;i < NUM_PING_TIMES;i++)
 619                 total += host_client->ping_times[i];
 620         // can be used for prediction
 621         host_client->ping = total / NUM_PING_TIMES;
 622         if ((val = GETEDICTFIELDVALUE(sv_player, eval_ping)))
 623                 val->_float = host_client->ping * 1000.0;
 624
 625         // read current angles
 626         // PROTOCOL_DARKPLACES4
 627         for (i = 0;i < 3;i++)
 628                 angle[i] = MSG_ReadPreciseAngle();
 629
 630         VectorCopy (angle, sv_player->v->v_angle);
 631
 632         // read movement
 633         move->forwardmove = MSG_ReadShort ();
 634         move->sidemove = MSG_ReadShort ();
 635         move->upmove = MSG_ReadShort ();
 636         if ((val = GETEDICTFIELDVALUE(sv_player, eval_movement)))
 637         {
 638                 val->vector[0] = move->forwardmove;
 639                 val->vector[1] = move->sidemove;
 640                 val->vector[2] = move->upmove;
 641         }
 642
 643         // read buttons
 644         bits = MSG_ReadByte ();
 645         sv_player->v->button0 = bits & 1;
 646         sv_player->v->button2 = (bits & 2)>>1;
 647         // LordHavoc: added 6 new buttons
 648         if ((val = GETEDICTFIELDVALUE(sv_player, eval_button3))) val->_float = ((bits >> 2) & 1);
 649         if ((val = GETEDICTFIELDVALUE(sv_player, eval_button4))) val->_float = ((bits >> 3) & 1);
 650         if ((val = GETEDICTFIELDVALUE(sv_player, eval_button5))) val->_float = ((bits >> 4) & 1);
 651         if ((val = GETEDICTFIELDVALUE(sv_player, eval_button6))) val->_float = ((bits >> 5) & 1);
 652         if ((val = GETEDICTFIELDVALUE(sv_player, eval_button7))) val->_float = ((bits >> 6) & 1);
 653         if ((val = GETEDICTFIELDVALUE(sv_player, eval_button8))) val->_float = ((bits >> 7) & 1);
 654
 655         i = MSG_ReadByte ();
 656         if (i)
 657                 sv_player->v->impulse = i;
 658 }
 659
 660 /*
 661 ===================
 662 SV_ReadClientMessage
 663 ===================
 664 */
 665 extern void SV_SendServerinfo(client_t *client);
 666 void SV_ReadClientMessage(void)
 667 {
 668         int cmd;
 669         char *s;
 670
 671         //MSG_BeginReading ();
 672
 673         for(;;)
 674         {
 675                 if (!host_client->active)
 676                 {
 677                         // a command caused an error
 678                         SV_DropClient (false);
 679                         return;
 680                 }
 681
 682                 if (msg_badread)
 683                 {
 684                         Con_Print("SV_ReadClientMessage: badread\n");
 685                         SV_DropClient (false);
 686                         return;
 687                 }
 688
 689                 cmd = MSG_ReadChar ();
 690                 if (cmd == -1)
 691                 {
 692                         // end of message
 693                         break;
 694                 }
 695
 696                 switch (cmd)
 697                 {
 698                 default:
 699                         Con_Printf("SV_ReadClientMessage: unknown command char %i\n", cmd);
 700                         SV_DropClient (false);
 701                         return;
 702
 703                 case clc_nop:
 704                         break;
 705
 706                 case clc_stringcmd:
 707                         s = MSG_ReadString ();
 708                         if (strncasecmp(s, "spawn", 5) == 0
 709                          || strncasecmp(s, "begin", 5) == 0
 710                          || strncasecmp(s, "prespawn", 8) == 0)
 711                                 Cmd_ExecuteString (s, src_client);
 712                         else if (SV_ParseClientCommandQC)
 713                         {
 714                                 G_INT(OFS_PARM0) = PR_SetString(s);
 715                                 pr_global_struct->self = EDICT_TO_PROG(host_client->edict);
 716                                 PR_ExecuteProgram ((func_t)(SV_ParseClientCommandQC - pr_functions), "");
 717                         }
 718                         else if (strncasecmp(s, "status", 6) == 0
 719                          || strncasecmp(s, "name", 4) == 0
 720                          || strncasecmp(s, "say", 3) == 0
 721                          || strncasecmp(s, "say_team", 8) == 0
 722                          || strncasecmp(s, "tell", 4) == 0
 723                          || strncasecmp(s, "color", 5) == 0
 724                          || strncasecmp(s, "kill", 4) == 0
 725                          || strncasecmp(s, "pause", 5) == 0
 726                          || strncasecmp(s, "kick", 4) == 0
 727                          || strncasecmp(s, "ping", 4) == 0
 728                          || strncasecmp(s, "ban", 3) == 0
 729                          || strncasecmp(s, "pmodel", 6) == 0
 730                          || strncasecmp(s, "rate", 4) == 0
 731                          || (gamemode == GAME_NEHAHRA && (strncasecmp(s, "max", 3) == 0 || strncasecmp(s, "monster", 7) == 0 || strncasecmp(s, "scrag", 5) == 0 || strncasecmp(s, "gimme", 5) == 0 || strncasecmp(s, "wraith", 6) == 0))
 732                          || (gamemode != GAME_NEHAHRA && (strncasecmp(s, "god", 3) == 0 || strncasecmp(s, "notarget", 8) == 0 || strncasecmp(s, "fly", 3) == 0 || strncasecmp(s, "give", 4) == 0 || strncasecmp(s, "noclip", 6) == 0)))
 733                                 Cmd_ExecuteString (s, src_client);
 734                         else
 735                                 Con_Printf("%s tried to %s\n", host_client->name, s);
 736                         break;
 737
 738                 case clc_disconnect:
 739                         SV_DropClient (false); // client wants to disconnect
 740                         return;
 741
 742                 case clc_move:
 743                         SV_ReadClientMove (&host_client->cmd);
 744                         break;
 745
 746                 case clc_ackentities:
 747                         host_client->entitydatabase4->ackframenum = MSG_ReadLong();
 748                         if (developer_networkentities.integer >= 1)
 749                                 Con_Printf("recv clc_ackentities %i\n", host_client->entitydatabase4->ackframenum);
 750                         EntityFrame4_AckFrame(host_client->entitydatabase4, host_client->entitydatabase4->ackframenum);
 751                         break;
 752                 }
 753         }
 754 }
 755
 756 /*
 757 ==================
 758 SV_RunClients
 759 ==================
 760 */
 761 void SV_RunClients (void)
 762 {
 763         int i;
 764
 765         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
 766         {
 767                 if (!host_client->active)
 768                         continue;
 769
 770                 if (!host_client->spawned)
 771                 {
 772                         // clear client movement until a new packet is received
 773                         memset (&host_client->cmd, 0, sizeof(host_client->cmd));
 774                         continue;
 775                 }
 776
 777                 if (sv.frametime)
 778                 {
 779                         sv_player = host_client->edict;
 780
 781                         // LordHavoc: QuakeC replacement for SV_ClientThink (player movement)
 782                         if (SV_PlayerPhysicsQC)
 783                         {
 784                                 pr_global_struct->time = sv.time;
 785                                 pr_global_struct->self = EDICT_TO_PROG(sv_player);
 786                                 PR_ExecuteProgram ((func_t)(SV_PlayerPhysicsQC - pr_functions), "");
 787                         }
 788                         else
 789                                 SV_ClientThink ();
 790
 791                         SV_CheckVelocity(sv_player);
 792
 793                         // LordHavoc: a hack to ensure that the (rather silly) id1 quakec
 794                         // player_run/player_stand1 does not horribly malfunction if the
 795                         // velocity becomes a number that is both == 0 and != 0
 796                         // (sounds to me like NaN but to be absolutely safe...)
 797                         if (DotProduct(sv_player->v->velocity, sv_player->v->velocity) < 0.0001)
 798                                 VectorClear(sv_player->v->velocity);
 799                 }
 800         }
 801 }
 802