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 #define DEBUGMOVES 0
  24
  25 cvar_t sv_wallfriction = {CVAR_NOTIFY, "sv_wallfriction", "1", "how much you slow down when sliding along a wall"};
  26 cvar_t sv_stepheight = {CVAR_NOTIFY, "sv_stepheight", "18", "how high you can step up (TW_SV_STEPCONTROL extension)"};
  27 cvar_t sv_stopspeed = {CVAR_NOTIFY, "sv_stopspeed","100", "how fast you come to a complete stop"};
  28 cvar_t sv_friction = {CVAR_NOTIFY, "sv_friction","4", "how fast you slow down"};
  29 cvar_t sv_waterfriction = {CVAR_NOTIFY, "sv_waterfriction","-1", "how fast you slow down, if less than 0 the sv_friction variable is used instead"};
  30 cvar_t sv_edgefriction = {0, "edgefriction", "2", "how much you slow down when nearing a ledge you might fall off"};
  31 cvar_t sv_idealpitchscale = {0, "sv_idealpitchscale","0.8", "how much to look up/down slopes and stairs when not using freelook"};
  32 cvar_t sv_maxspeed = {CVAR_NOTIFY, "sv_maxspeed", "320", "maximum speed a player can accelerate to when on ground (can be exceeded by tricks)"};
  33 cvar_t sv_maxairspeed = {0, "sv_maxairspeed", "30", "maximum speed a player can accelerate to when airborn (note that it is possible to completely stop by moving the opposite direction)"};
  34 cvar_t sv_accelerate = {0, "sv_accelerate", "10", "rate at which a player accelerates to sv_maxspeed"};
  35 cvar_t sv_airaccelerate = {0, "sv_airaccelerate", "-1", "rate at which a player accelerates to sv_maxairspeed while in the air, if less than 0 the sv_accelerate variable is used instead"};
  36 cvar_t sv_wateraccelerate = {0, "sv_wateraccelerate", "-1", "rate at which a player accelerates to sv_maxspeed while in the air, if less than 0 the sv_accelerate variable is used instead"};
  37 cvar_t sv_jumpvelocity = {0, "sv_jumpvelocity", "270", "cvar that can be used by QuakeC code for jump velocity"};
  38 cvar_t sv_airaccel_qw = {0, "sv_airaccel_qw", "1", "ratio of QW-style air control as opposed to simple acceleration"};
  39 cvar_t sv_airaccel_sideways_friction = {0, "sv_airaccel_sideways_friction", "", "anti-sideways movement stabilization (reduces speed gain when zigzagging)"};
  40 cvar_t sv_clmovement_enable = {0, "sv_clmovement_enable", "1", "whether to allow clients to use cl_movement prediction, which can cause choppy movement on the server which may annoy other players"};
  41 cvar_t sv_clmovement_minping = {0, "sv_clmovement_minping", "0", "if client ping is below this time in milliseconds, then their ability to use cl_movement prediction is disabled for a while (as they don't need it)"};
  42 cvar_t sv_clmovement_minping_disabletime = {0, "sv_clmovement_minping_disabletime", "1000", "when client falls below minping, disable their prediction for this many milliseconds (should be at least 1000 or else their prediction may turn on/off frequently)"};
  43 cvar_t sv_clmovement_waitforinput = {0, "sv_clmovement_waitforinput", "16", "when a client does not send input for this many frames, force them to move anyway (unlike QuakeWorld)"};
  44
  45 static 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, step, dir;
  57         trace_t tr;
  58         vec3_t  top, bottom;
  59         float   z[MAX_FORWARD];
  60         int             i, j;
  61         int             steps;
  62
  63         if (!((int)host_client->edict->fields.server->flags & FL_ONGROUND))
  64                 return;
  65
  66         angleval = host_client->edict->fields.server->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] = host_client->edict->fields.server->origin[0] + cosval*(i+3)*12;
  73                 top[1] = host_client->edict->fields.server->origin[1] + sinval*(i+3)*12;
  74                 top[2] = host_client->edict->fields.server->origin[2] + host_client->edict->fields.server->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, host_client->edict, SUPERCONTENTS_SOLID);
  81                 // if looking at a wall, leave ideal the way is was
  82                 if (tr.startsolid)
  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                 host_client->edict->fields.server->idealpitch = 0;
 111                 return;
 112         }
 113
 114         if (steps < 2)
 115                 return;
 116         host_client->edict->fields.server->idealpitch = -dir * sv_idealpitchscale.value;
 117 }
 118
 119 static vec3_t wishdir, forward, right, up;
 120 static float wishspeed;
 121
 122 static qboolean onground;
 123
 124 /*
 125 ==================
 126 SV_UserFriction
 127
 128 ==================
 129 */
 130 void SV_UserFriction (void)
 131 {
 132         float speed, newspeed, control, friction;
 133         vec3_t start, stop;
 134         trace_t trace;
 135
 136         speed = sqrt(host_client->edict->fields.server->velocity[0]*host_client->edict->fields.server->velocity[0]+host_client->edict->fields.server->velocity[1]*host_client->edict->fields.server->velocity[1]);
 137         if (!speed)
 138                 return;
 139
 140         // if the leading edge is over a dropoff, increase friction
 141         start[0] = stop[0] = host_client->edict->fields.server->origin[0] + host_client->edict->fields.server->velocity[0]/speed*16;
 142         start[1] = stop[1] = host_client->edict->fields.server->origin[1] + host_client->edict->fields.server->velocity[1]/speed*16;
 143         start[2] = host_client->edict->fields.server->origin[2] + host_client->edict->fields.server->mins[2];
 144         stop[2] = start[2] - 34;
 145
 146         trace = SV_Move (start, vec3_origin, vec3_origin, stop, MOVE_NOMONSTERS, host_client->edict, SV_GenericHitSuperContentsMask(host_client->edict));
 147
 148         if (trace.fraction == 1.0)
 149                 friction = sv_friction.value*sv_edgefriction.value;
 150         else
 151                 friction = sv_friction.value;
 152
 153         // apply friction
 154         control = speed < sv_stopspeed.value ? sv_stopspeed.value : speed;
 155         newspeed = speed - sv.frametime*control*friction;
 156
 157         if (newspeed < 0)
 158                 newspeed = 0;
 159         else
 160                 newspeed /= speed;
 161
 162         VectorScale(host_client->edict->fields.server->velocity, newspeed, host_client->edict->fields.server->velocity);
 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 (host_client->edict->fields.server->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                 host_client->edict->fields.server->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 > sv_maxairspeed.value)
 194                 wishspd = sv_maxairspeed.value;
 195         currentspeed = DotProduct (host_client->edict->fields.server->velocity, wishveloc);
 196         addspeed = wishspd - currentspeed;
 197         if (addspeed <= 0)
 198                 return;
 199         accelspeed = (sv_airaccelerate.value < 0 ? sv_accelerate.value : sv_airaccelerate.value)*wishspeed * sv.frametime;
 200         if (accelspeed > addspeed)
 201                 accelspeed = addspeed;
 202
 203         for (i=0 ; i<3 ; i++)
 204                 host_client->edict->fields.server->velocity[i] += accelspeed*wishveloc[i];
 205 }
 206
 207
 208 void DropPunchAngle (void)
 209 {
 210         float len;
 211         prvm_eval_t *val;
 212
 213         len = VectorNormalizeLength (host_client->edict->fields.server->punchangle);
 214
 215         len -= 10*sv.frametime;
 216         if (len < 0)
 217                 len = 0;
 218         VectorScale (host_client->edict->fields.server->punchangle, len, host_client->edict->fields.server->punchangle);
 219
 220         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.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 (host_client->edict->fields.server->v_angle, forward, right, up);
 242
 243         for (i = 0; i < 3; i++)
 244                 host_client->edict->fields.server->velocity[i] = forward[i] * cmd.forwardmove + right[i] * cmd.sidemove;
 245
 246         host_client->edict->fields.server->velocity[2] += cmd.upmove;
 247
 248         wishspeed = VectorLength(host_client->edict->fields.server->velocity);
 249         if (wishspeed > sv_maxspeed.value)
 250                 VectorScale(host_client->edict->fields.server->velocity, sv_maxspeed.value / wishspeed, host_client->edict->fields.server->velocity);
 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         // user intentions
 266         AngleVectors (host_client->edict->fields.server->v_angle, forward, right, up);
 267
 268         for (i=0 ; i<3 ; i++)
 269                 wishvel[i] = forward[i]*cmd.forwardmove + right[i]*cmd.sidemove;
 270
 271         if (!cmd.forwardmove && !cmd.sidemove && !cmd.upmove)
 272                 wishvel[2] -= 60;               // drift towards bottom
 273         else
 274                 wishvel[2] += cmd.upmove;
 275
 276         wishspeed = VectorLength(wishvel);
 277         if (wishspeed > sv_maxspeed.value)
 278         {
 279                 temp = sv_maxspeed.value/wishspeed;
 280                 VectorScale (wishvel, temp, wishvel);
 281                 wishspeed = sv_maxspeed.value;
 282         }
 283         wishspeed *= 0.7;
 284
 285         // water friction
 286         speed = VectorLength(host_client->edict->fields.server->velocity);
 287         if (speed)
 288         {
 289                 newspeed = speed - sv.frametime * speed * (sv_waterfriction.value < 0 ? sv_friction.value : sv_waterfriction.value);
 290                 if (newspeed < 0)
 291                         newspeed = 0;
 292                 temp = newspeed/speed;
 293                 VectorScale(host_client->edict->fields.server->velocity, temp, host_client->edict->fields.server->velocity);
 294         }
 295         else
 296                 newspeed = 0;
 297
 298         // water acceleration
 299         if (!wishspeed)
 300                 return;
 301
 302         addspeed = wishspeed - newspeed;
 303         if (addspeed <= 0)
 304                 return;
 305
 306         VectorNormalize (wishvel);
 307         accelspeed = (sv_wateraccelerate.value < 0 ? sv_accelerate.value : sv_wateraccelerate.value) * wishspeed * sv.frametime;
 308         if (accelspeed > addspeed)
 309                 accelspeed = addspeed;
 310
 311         for (i=0 ; i<3 ; i++)
 312                 host_client->edict->fields.server->velocity[i] += accelspeed * wishvel[i];
 313 }
 314
 315 void SV_WaterJump (void)
 316 {
 317         if (sv.time > host_client->edict->fields.server->teleport_time || !host_client->edict->fields.server->waterlevel)
 318         {
 319                 host_client->edict->fields.server->flags = (int)host_client->edict->fields.server->flags & ~FL_WATERJUMP;
 320                 host_client->edict->fields.server->teleport_time = 0;
 321         }
 322         host_client->edict->fields.server->velocity[0] = host_client->edict->fields.server->movedir[0];
 323         host_client->edict->fields.server->velocity[1] = host_client->edict->fields.server->movedir[1];
 324 }
 325
 326
 327 /*
 328 ===================
 329 SV_AirMove
 330
 331 ===================
 332 */
 333 void SV_AirMove (void)
 334 {
 335         int i;
 336         vec3_t wishvel;
 337         float fmove, smove, temp;
 338
 339         // LordHavoc: correct quake movement speed bug when looking up/down
 340         wishvel[0] = wishvel[2] = 0;
 341         wishvel[1] = host_client->edict->fields.server->angles[1];
 342         AngleVectors (wishvel, forward, right, up);
 343
 344         fmove = cmd.forwardmove;
 345         smove = cmd.sidemove;
 346
 347 // hack to not let you back into teleporter
 348         if (sv.time < host_client->edict->fields.server->teleport_time && fmove < 0)
 349                 fmove = 0;
 350
 351         for (i=0 ; i<3 ; i++)
 352                 wishvel[i] = forward[i]*fmove + right[i]*smove;
 353
 354         if ((int)host_client->edict->fields.server->movetype != MOVETYPE_WALK)
 355                 wishvel[2] += cmd.upmove;
 356
 357         VectorCopy (wishvel, wishdir);
 358         wishspeed = VectorNormalizeLength(wishdir);
 359         if (wishspeed > sv_maxspeed.value)
 360         {
 361                 temp = sv_maxspeed.value/wishspeed;
 362                 VectorScale (wishvel, temp, wishvel);
 363                 wishspeed = sv_maxspeed.value;
 364         }
 365
 366         if (host_client->edict->fields.server->movetype == MOVETYPE_NOCLIP)
 367         {
 368                 // noclip
 369                 VectorCopy (wishvel, host_client->edict->fields.server->velocity);
 370         }
 371         else if (onground && (!sv_gameplayfix_qwplayerphysics.integer || !(host_client->edict->fields.server->button2 || !((int)host_client->edict->fields.server->flags & FL_JUMPRELEASED))))
 372         {
 373                 SV_UserFriction ();
 374                 SV_Accelerate ();
 375         }
 376         else
 377         {
 378                 // not on ground, so little effect on velocity
 379                 SV_AirAccelerate (wishvel);
 380         }
 381 }
 382
 383 /*
 384 ===================
 385 SV_ClientThink
 386
 387 the move fields specify an intended velocity in pix/sec
 388 the angle fields specify an exact angular motion in degrees
 389 ===================
 390 */
 391 extern cvar_t sv_playerphysicsqc;
 392 void SV_ClientThink (void)
 393 {
 394         vec3_t v_angle;
 395
 396         SV_ApplyClientMove();
 397         // make sure the velocity is sane (not a NaN)
 398         SV_CheckVelocity(host_client->edict);
 399
 400         // LordHavoc: QuakeC replacement for SV_ClientThink (player movement)
 401         if (prog->funcoffsets.SV_PlayerPhysics && sv_playerphysicsqc.integer)
 402         {
 403                 prog->globals.server->time = sv.time;
 404                 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
 405                 PRVM_ExecuteProgram (prog->funcoffsets.SV_PlayerPhysics, "QC function SV_PlayerPhysics is missing");
 406                 SV_CheckVelocity(host_client->edict);
 407                 return;
 408         }
 409
 410         if (host_client->edict->fields.server->movetype == MOVETYPE_NONE)
 411                 return;
 412
 413         onground = (int)host_client->edict->fields.server->flags & FL_ONGROUND;
 414
 415         DropPunchAngle ();
 416
 417         // if dead, behave differently
 418         if (host_client->edict->fields.server->health <= 0)
 419                 return;
 420
 421         cmd = host_client->cmd;
 422
 423         // angles
 424         // show 1/3 the pitch angle and all the roll angle
 425         VectorAdd (host_client->edict->fields.server->v_angle, host_client->edict->fields.server->punchangle, v_angle);
 426         host_client->edict->fields.server->angles[ROLL] = V_CalcRoll (host_client->edict->fields.server->angles, host_client->edict->fields.server->velocity)*4;
 427         if (!host_client->edict->fields.server->fixangle)
 428         {
 429                 host_client->edict->fields.server->angles[PITCH] = -v_angle[PITCH]/3;
 430                 host_client->edict->fields.server->angles[YAW] = v_angle[YAW];
 431         }
 432
 433         if ( (int)host_client->edict->fields.server->flags & FL_WATERJUMP )
 434         {
 435                 SV_WaterJump ();
 436                 SV_CheckVelocity(host_client->edict);
 437                 return;
 438         }
 439
 440         /*
 441         // Player is (somehow) outside of the map, or flying, or noclipping
 442         if (host_client->edict->fields.server->movetype != MOVETYPE_NOCLIP && (host_client->edict->fields.server->movetype == MOVETYPE_FLY || SV_TestEntityPosition (host_client->edict)))
 443         //if (host_client->edict->fields.server->movetype == MOVETYPE_NOCLIP || host_client->edict->fields.server->movetype == MOVETYPE_FLY || SV_TestEntityPosition (host_client->edict))
 444         {
 445                 SV_FreeMove ();
 446                 return;
 447         }
 448         */
 449
 450         // walk
 451         if ((host_client->edict->fields.server->waterlevel >= 2) && (host_client->edict->fields.server->movetype != MOVETYPE_NOCLIP))
 452         {
 453                 SV_WaterMove ();
 454                 SV_CheckVelocity(host_client->edict);
 455                 return;
 456         }
 457
 458         SV_AirMove ();
 459         SV_CheckVelocity(host_client->edict);
 460 }
 461
 462 /*
 463 ===================
 464 SV_ReadClientMove
 465 ===================
 466 */
 467 int sv_numreadmoves = 0;
 468 usercmd_t sv_readmoves[CL_MAX_USERCMDS];
 469 void SV_ReadClientMove (void)
 470 {
 471         int i;
 472         usercmd_t newmove;
 473         usercmd_t *move = &newmove;
 474
 475         memset(move, 0, sizeof(*move));
 476
 477         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 478
 479         // read ping time
 480         if (sv.protocol != PROTOCOL_QUAKE && sv.protocol != PROTOCOL_QUAKEDP && sv.protocol != PROTOCOL_NEHAHRAMOVIE && sv.protocol != PROTOCOL_DARKPLACES1 && sv.protocol != PROTOCOL_DARKPLACES2 && sv.protocol != PROTOCOL_DARKPLACES3 && sv.protocol != PROTOCOL_DARKPLACES4 && sv.protocol != PROTOCOL_DARKPLACES5 && sv.protocol != PROTOCOL_DARKPLACES6)
 481                 move->sequence = MSG_ReadLong ();
 482         move->time = MSG_ReadFloat ();
 483         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 484         move->receivetime = (float)sv.time;
 485
 486 #if DEBUGMOVES
 487         Con_Printf("%s move%i #%i %ims (%ims) %i %i '%i %i %i' '%i %i %i'\n", move->time > move->receivetime ? "^3read future" : "^4read normal", sv_numreadmoves + 1, move->sequence, (int)floor((move->time - host_client->cmd.time) * 1000.0 + 0.5), (int)floor(move->time * 1000.0 + 0.5), move->impulse, move->buttons, (int)move->viewangles[0], (int)move->viewangles[1], (int)move->viewangles[2], (int)move->forwardmove, (int)move->sidemove, (int)move->upmove);
 488 #endif
 489         // limit reported time to current time
 490         // (incase the client is trying to cheat)
 491         move->time = min(move->time, move->receivetime + sv.frametime);
 492
 493         // read current angles
 494         for (i = 0;i < 3;i++)
 495         {
 496                 if (sv.protocol == PROTOCOL_QUAKE || sv.protocol == PROTOCOL_QUAKEDP || sv.protocol == PROTOCOL_NEHAHRAMOVIE)
 497                         move->viewangles[i] = MSG_ReadAngle8i();
 498                 else if (sv.protocol == PROTOCOL_DARKPLACES1)
 499                         move->viewangles[i] = MSG_ReadAngle16i();
 500                 else if (sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3)
 501                         move->viewangles[i] = MSG_ReadAngle32f();
 502                 else
 503                         move->viewangles[i] = MSG_ReadAngle16i();
 504         }
 505         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 506
 507         // read movement
 508         move->forwardmove = MSG_ReadCoord16i ();
 509         move->sidemove = MSG_ReadCoord16i ();
 510         move->upmove = MSG_ReadCoord16i ();
 511         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 512
 513         // read buttons
 514         // be sure to bitwise OR them into the move->buttons because we want to
 515         // accumulate button presses from multiple packets per actual move
 516         if (sv.protocol == PROTOCOL_QUAKE || sv.protocol == PROTOCOL_QUAKEDP || sv.protocol == PROTOCOL_NEHAHRAMOVIE || sv.protocol == PROTOCOL_DARKPLACES1 || sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3 || sv.protocol == PROTOCOL_DARKPLACES4 || sv.protocol == PROTOCOL_DARKPLACES5)
 517                 move->buttons = MSG_ReadByte ();
 518         else
 519                 move->buttons = MSG_ReadLong ();
 520         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 521
 522         // read impulse
 523         move->impulse = MSG_ReadByte ();
 524         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 525
 526         // PRYDON_CLIENTCURSOR
 527         if (sv.protocol != PROTOCOL_QUAKE && sv.protocol != PROTOCOL_QUAKEDP && sv.protocol != PROTOCOL_NEHAHRAMOVIE && sv.protocol != PROTOCOL_DARKPLACES1 && sv.protocol != PROTOCOL_DARKPLACES2 && sv.protocol != PROTOCOL_DARKPLACES3 && sv.protocol != PROTOCOL_DARKPLACES4 && sv.protocol != PROTOCOL_DARKPLACES5)
 528         {
 529                 // 30 bytes
 530                 move->cursor_screen[0] = MSG_ReadShort() * (1.0f / 32767.0f);
 531                 move->cursor_screen[1] = MSG_ReadShort() * (1.0f / 32767.0f);
 532                 move->cursor_start[0] = MSG_ReadFloat();
 533                 move->cursor_start[1] = MSG_ReadFloat();
 534                 move->cursor_start[2] = MSG_ReadFloat();
 535                 move->cursor_impact[0] = MSG_ReadFloat();
 536                 move->cursor_impact[1] = MSG_ReadFloat();
 537                 move->cursor_impact[2] = MSG_ReadFloat();
 538                 move->cursor_entitynumber = (unsigned short)MSG_ReadShort();
 539                 if (move->cursor_entitynumber >= prog->max_edicts)
 540                 {
 541                         Con_DPrintf("SV_ReadClientMessage: client send bad cursor_entitynumber\n");
 542                         move->cursor_entitynumber = 0;
 543                 }
 544                 // as requested by FrikaC, cursor_trace_ent is reset to world if the
 545                 // entity is free at time of receipt
 546                 if (PRVM_EDICT_NUM(move->cursor_entitynumber)->priv.server->free)
 547                         move->cursor_entitynumber = 0;
 548                 if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 549         }
 550
 551         // if the previous move has not been applied yet, we need to accumulate
 552         // the impulse/buttons from it
 553         if (!host_client->cmd.applied)
 554         {
 555                 if (!move->impulse)
 556                         move->impulse = host_client->cmd.impulse;
 557                 move->buttons |= host_client->cmd.buttons;
 558         }
 559
 560         // now store this move for later execution
 561         // (we have to buffer the moves because of old ones being repeated)
 562         if (sv_numreadmoves < CL_MAX_USERCMDS)
 563                 sv_readmoves[sv_numreadmoves++] = *move;
 564 }
 565
 566 void SV_ExecuteClientMoves(void)
 567 {
 568         int moveindex;
 569         float moveframetime;
 570         double oldframetime;
 571         double oldframetime2;
 572 #ifdef NUM_PING_TIMES
 573         double total;
 574 #endif
 575         prvm_eval_t *val;
 576         if (sv_numreadmoves < 1)
 577                 return;
 578         // only start accepting input once the player is spawned
 579         if (!host_client->spawned)
 580                 return;
 581 #if DEBUGMOVES
 582         Con_Printf("SV_ExecuteClientMoves: read %i moves at sv.time %f\n", sv_numreadmoves, (float)sv.time);
 583 #endif
 584         // disable clientside movement prediction in some cases
 585         if (ceil(max(sv_readmoves[sv_numreadmoves-1].receivetime - sv_readmoves[sv_numreadmoves-1].time, 0) * 1000.0) < sv_clmovement_minping.integer)
 586                 host_client->clmovement_disabletimeout = realtime + sv_clmovement_minping_disabletime.value / 1000.0;
 587         // several conditions govern whether clientside movement prediction is allowed
 588         if (sv_readmoves[sv_numreadmoves-1].sequence && sv_clmovement_enable.integer && sv_clmovement_waitforinput.integer > 0 && host_client->clmovement_disabletimeout <= realtime && host_client->edict->fields.server->movetype == MOVETYPE_WALK && (!(val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.disableclientprediction)) || !val->_float))
 589         {
 590                 // process the moves in order and ignore old ones
 591                 // but always trust the latest move
 592                 // (this deals with bogus initial move sequences after level change,
 593                 //  where the client will eventually catch up with the level change
 594                 //  and reset its move sequence)
 595                 for (moveindex = 0;moveindex < sv_numreadmoves;moveindex++)
 596                 {
 597                         usercmd_t *move = sv_readmoves + moveindex;
 598                         if (host_client->movesequence < move->sequence || moveindex == sv_numreadmoves - 1)
 599                         {
 600 #if DEBUGMOVES
 601                                 Con_Printf("%smove #%i %ims (%ims) %i %i '%i %i %i' '%i %i %i'\n", (move->time - host_client->cmd.time) > sv.frametime * 1.01 ? "^1" : "^2", move->sequence, (int)floor((move->time - host_client->cmd.time) * 1000.0 + 0.5), (int)floor(move->time * 1000.0 + 0.5), move->impulse, move->buttons, (int)move->viewangles[0], (int)move->viewangles[1], (int)move->viewangles[2], (int)move->forwardmove, (int)move->sidemove, (int)move->upmove);
 602 #endif
 603                                 // this is a new move
 604                                 moveframetime = bound(0, move->time - host_client->cmd.time, 0.1);
 605                                 //Con_Printf("movesequence = %i (%i lost), moveframetime = %f\n", move->sequence, move->sequence ? move->sequence - host_client->movesequence - 1 : 0, moveframetime);
 606                                 host_client->cmd = *move;
 607                                 host_client->movesequence = move->sequence;
 608
 609                                 // if using prediction, we need to perform moves when packets are
 610                                 // received, even if multiple occur in one frame
 611                                 // (they can't go beyond the current time so there is no cheat issue
 612                                 //  with this approach, and if they don't send input for a while they
 613                                 //  start moving anyway, so the longest 'lagaport' possible is
 614                                 //  determined by the sv_clmovement_waitforinput cvar)
 615                                 if (moveframetime <= 0)
 616                                         continue;
 617                                 oldframetime = prog->globals.server->frametime;
 618                                 oldframetime2 = sv.frametime;
 619                                 // update ping time for qc to see while executing this move
 620                                 host_client->ping = host_client->cmd.receivetime - host_client->cmd.time;
 621                                 // the server and qc frametime values must be changed temporarily
 622                                 prog->globals.server->frametime = sv.frametime = moveframetime;
 623                                 // if move is more than 50ms, split it into two moves (this matches QWSV behavior and the client prediction)
 624                                 if (sv.frametime > 0.05)
 625                                 {
 626                                         prog->globals.server->frametime = sv.frametime = moveframetime * 0.5f;
 627                                         SV_Physics_ClientMove();
 628                                 }
 629                                 SV_Physics_ClientMove();
 630                                 sv.frametime = oldframetime2;
 631                                 prog->globals.server->frametime = oldframetime;
 632                                 host_client->clmovement_skipphysicsframes = sv_clmovement_waitforinput.integer;
 633                         }
 634                 }
 635         }
 636         else
 637         {
 638                 // try to gather button bits from old moves, but only if their time is
 639                 // advancing (ones with the same timestamp can't be trusted)
 640                 for (moveindex = 0;moveindex < sv_numreadmoves-1;moveindex++)
 641                 {
 642                         usercmd_t *move = sv_readmoves + moveindex;
 643                         if (host_client->cmd.time < move->time)
 644                         {
 645                                 sv_readmoves[sv_numreadmoves-1].buttons |= move->buttons;
 646                                 if (move->impulse)
 647                                         sv_readmoves[sv_numreadmoves-1].impulse = move->impulse;
 648                         }
 649                 }
 650                 // now copy the new move
 651                 host_client->cmd = sv_readmoves[sv_numreadmoves-1];
 652                 host_client->movesequence = 0;
 653                 // make sure that normal physics takes over immediately
 654                 host_client->clmovement_skipphysicsframes = 0;
 655         }
 656
 657         // calculate average ping time
 658         host_client->ping = host_client->cmd.receivetime - host_client->cmd.time;
 659 #ifdef NUM_PING_TIMES
 660         host_client->ping_times[host_client->num_pings % NUM_PING_TIMES] = host_client->cmd.receivetime - host_client->cmd.time;
 661         host_client->num_pings++;
 662         for (i=0, total = 0;i < NUM_PING_TIMES;i++)
 663                 total += host_client->ping_times[i];
 664         host_client->ping = total / NUM_PING_TIMES;
 665 #endif
 666 }
 667
 668 void SV_ApplyClientMove (void)
 669 {
 670         prvm_eval_t *val;
 671         usercmd_t *move = &host_client->cmd;
 672
 673         if (!move->receivetime)
 674                 return;
 675
 676         // note: a move can be applied multiple times if the client packets are
 677         // not coming as often as the physics is executed, and the move must be
 678         // applied before running qc each time because the id1 qc had a bug where
 679         // it clears self.button2 in PlayerJump, causing pogostick behavior if
 680         // moves are not applied every time before calling qc
 681         move->applied = true;
 682
 683         // set the edict fields
 684         host_client->edict->fields.server->button0 = move->buttons & 1;
 685         host_client->edict->fields.server->button2 = (move->buttons & 2)>>1;
 686         if (move->impulse)
 687                 host_client->edict->fields.server->impulse = move->impulse;
 688         // only send the impulse to qc once
 689         move->impulse = 0;
 690         VectorCopy(move->viewangles, host_client->edict->fields.server->v_angle);
 691         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button3))) val->_float = ((move->buttons >> 2) & 1);
 692         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button4))) val->_float = ((move->buttons >> 3) & 1);
 693         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button5))) val->_float = ((move->buttons >> 4) & 1);
 694         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button6))) val->_float = ((move->buttons >> 5) & 1);
 695         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button7))) val->_float = ((move->buttons >> 6) & 1);
 696         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button8))) val->_float = ((move->buttons >> 7) & 1);
 697         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button9))) val->_float = ((move->buttons >> 11) & 1);
 698         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button10))) val->_float = ((move->buttons >> 12) & 1);
 699         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button11))) val->_float = ((move->buttons >> 13) & 1);
 700         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button12))) val->_float = ((move->buttons >> 14) & 1);
 701         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button13))) val->_float = ((move->buttons >> 15) & 1);
 702         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button14))) val->_float = ((move->buttons >> 16) & 1);
 703         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button15))) val->_float = ((move->buttons >> 17) & 1);
 704         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button16))) val->_float = ((move->buttons >> 18) & 1);
 705         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.buttonuse))) val->_float = ((move->buttons >> 8) & 1);
 706         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.buttonchat))) val->_float = ((move->buttons >> 9) & 1);
 707         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_active))) val->_float = ((move->buttons >> 10) & 1);
 708         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.movement))) VectorSet(val->vector, move->forwardmove, move->sidemove, move->upmove);
 709         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_screen))) VectorCopy(move->cursor_screen, val->vector);
 710         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_trace_start))) VectorCopy(move->cursor_start, val->vector);
 711         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_trace_endpos))) VectorCopy(move->cursor_impact, val->vector);
 712         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_trace_ent))) val->edict = PRVM_EDICT_TO_PROG(PRVM_EDICT_NUM(move->cursor_entitynumber));
 713         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.ping))) val->_float = host_client->ping * 1000.0;
 714 }
 715
 716 void SV_FrameLost(int framenum)
 717 {
 718         if (host_client->entitydatabase5)
 719                 EntityFrame5_LostFrame(host_client->entitydatabase5, framenum);
 720 }
 721
 722 void SV_FrameAck(int framenum)
 723 {
 724         if (host_client->entitydatabase)
 725                 EntityFrame_AckFrame(host_client->entitydatabase, framenum);
 726         else if (host_client->entitydatabase4)
 727                 EntityFrame4_AckFrame(host_client->entitydatabase4, framenum, true);
 728         else if (host_client->entitydatabase5)
 729                 EntityFrame5_AckFrame(host_client->entitydatabase5, framenum);
 730 }
 731
 732 /*
 733 ===================
 734 SV_ReadClientMessage
 735 ===================
 736 */
 737 extern void SV_SendServerinfo(client_t *client);
 738 extern sizebuf_t vm_tempstringsbuf;
 739 void SV_ReadClientMessage(void)
 740 {
 741         int cmd, num, start;
 742         char *s;
 743
 744         //MSG_BeginReading ();
 745         sv_numreadmoves = 0;
 746
 747         for(;;)
 748         {
 749                 if (!host_client->active)
 750                 {
 751                         // a command caused an error
 752                         SV_DropClient (false);
 753                         return;
 754                 }
 755
 756                 if (msg_badread)
 757                 {
 758                         Con_Print("SV_ReadClientMessage: badread\n");
 759                         SV_DropClient (false);
 760                         return;
 761                 }
 762
 763                 cmd = MSG_ReadByte ();
 764                 if (cmd == -1)
 765                 {
 766                         // end of message
 767                         // apply the moves that were read this frame
 768                         SV_ExecuteClientMoves();
 769                         break;
 770                 }
 771
 772                 switch (cmd)
 773                 {
 774                 default:
 775                         Con_Printf("SV_ReadClientMessage: unknown command char %i\n", cmd);
 776                         SV_DropClient (false);
 777                         return;
 778
 779                 case clc_nop:
 780                         break;
 781
 782                 case clc_stringcmd:
 783                         s = MSG_ReadString ();
 784                         if (strncasecmp(s, "spawn", 5) == 0
 785                          || strncasecmp(s, "begin", 5) == 0
 786                          || strncasecmp(s, "prespawn", 8) == 0)
 787                                 Cmd_ExecuteString (s, src_client);
 788                         else if (prog->funcoffsets.SV_ParseClientCommand)
 789                         {
 790                                 int restorevm_tempstringsbuf_cursize;
 791                                 restorevm_tempstringsbuf_cursize = vm_tempstringsbuf.cursize;
 792                                 PRVM_G_INT(OFS_PARM0) = PRVM_SetTempString(s);
 793                                 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
 794                                 PRVM_ExecuteProgram (prog->funcoffsets.SV_ParseClientCommand, "QC function SV_ParseClientCommand is missing");
 795                                 vm_tempstringsbuf.cursize = restorevm_tempstringsbuf_cursize;
 796                         }
 797                         else
 798                                 Cmd_ExecuteString (s, src_client);
 799                         break;
 800
 801                 case clc_disconnect:
 802                         SV_DropClient (false); // client wants to disconnect
 803                         return;
 804
 805                 case clc_move:
 806                         SV_ReadClientMove();
 807                         break;
 808
 809                 case clc_ackdownloaddata:
 810                         start = MSG_ReadLong();
 811                         num = MSG_ReadShort();
 812                         if (host_client->download_file && host_client->download_started)
 813                         {
 814                                 if (host_client->download_expectedposition == start)
 815                                 {
 816                                         int size = (int)FS_FileSize(host_client->download_file);
 817                                         // a data block was successfully received by the client,
 818                                         // update the expected position on the next data block
 819                                         host_client->download_expectedposition = start + num;
 820                                         // if this was the last data block of the file, it's done
 821                                         if (host_client->download_expectedposition >= FS_FileSize(host_client->download_file))
 822                                         {
 823                                                 // tell the client that the download finished
 824                                                 // we need to calculate the crc now
 825                                                 //
 826                                                 // note: at this point the OS probably has the file
 827                                                 // entirely in memory, so this is a faster operation
 828                                                 // now than it was when the download started.
 829                                                 //
 830                                                 // it is also preferable to do this at the end of the
 831                                                 // download rather than the start because it reduces
 832                                                 // potential for Denial Of Service attacks against the
 833                                                 // server.
 834                                                 int crc;
 835                                                 unsigned char *temp;
 836                                                 FS_Seek(host_client->download_file, 0, SEEK_SET);
 837                                                 temp = Mem_Alloc(tempmempool, size);
 838                                                 FS_Read(host_client->download_file, temp, size);
 839                                                 crc = CRC_Block(temp, size);
 840                                                 Mem_Free(temp);
 841                                                 // calculated crc, send the file info to the client
 842                                                 // (so that it can verify the data)
 843                                                 Host_ClientCommands(va("\ncl_downloadfinished %i %i %s\n", size, crc, host_client->download_name));
 844                                                 Con_DPrintf("Download of %s by %s has finished\n", host_client->download_name, host_client->name);
 845                                                 FS_Close(host_client->download_file);
 846                                                 host_client->download_file = NULL;
 847                                                 host_client->download_name[0] = 0;
 848                                                 host_client->download_expectedposition = 0;
 849                                                 host_client->download_started = false;
 850                                         }
 851                                 }
 852                                 else
 853                                 {
 854                                         // a data block was lost, reset to the expected position
 855                                         // and resume sending from there
 856                                         FS_Seek(host_client->download_file, host_client->download_expectedposition, SEEK_SET);
 857                                 }
 858                         }
 859                         break;
 860
 861                 case clc_ackframe:
 862                         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 863                         num = MSG_ReadLong();
 864                         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 865                         if (developer_networkentities.integer >= 10)
 866                                 Con_Printf("recv clc_ackframe %i\n", num);
 867                         // if the client hasn't progressed through signons yet,
 868                         // ignore any clc_ackframes we get (they're probably from the
 869                         // previous level)
 870                         if (host_client->spawned && host_client->latestframenum < num)
 871                         {
 872                                 int i;
 873                                 for (i = host_client->latestframenum + 1;i < num;i++)
 874                                         SV_FrameLost(i);
 875                                 SV_FrameAck(num);
 876                                 host_client->latestframenum = num;
 877                         }
 878                         break;
 879                 }
 880         }
 881 }
 882