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_edgefriction = {0, "edgefriction", "2", "how much you slow down when nearing a ledge you might fall off"};
  26 cvar_t sv_idealpitchscale = {0, "sv_idealpitchscale","0.8", "how much to look up/down slopes and stairs when not using freelook"};
  27 cvar_t sv_maxspeed = {CVAR_NOTIFY, "sv_maxspeed", "320", "maximum speed a player can accelerate to when on ground (can be exceeded by tricks)"};
  28 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)"};
  29 cvar_t sv_accelerate = {0, "sv_accelerate", "10", "rate at which a player accelerates to sv_maxspeed"};
  30 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"};
  31 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"};
  32 cvar_t sv_jumpvelocity = {0, "sv_jumpvelocity", "270", "cvar that can be used by QuakeC code for jump velocity"};
  33 cvar_t sv_airaccel_qw = {0, "sv_airaccelerate", "1", "ratio of QW-style air control as opposed to simple acceleration"};
  34 cvar_t sv_airaccel_sideways_friction = {0, "sv_airaccelerate", "", "anti-sideways movement stabilization (reduces speed gain when zigzagging)"};
  35 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"};
  36 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)"};
  37 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)"};
  38 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)"};
  39
  40 static usercmd_t cmd;
  41
  42
  43 /*
  44 ===============
  45 SV_SetIdealPitch
  46 ===============
  47 */
  48 #define MAX_FORWARD     6
  49 void SV_SetIdealPitch (void)
  50 {
  51         float   angleval, sinval, cosval, step, dir;
  52         trace_t tr;
  53         vec3_t  top, bottom;
  54         float   z[MAX_FORWARD];
  55         int             i, j;
  56         int             steps;
  57
  58         if (!((int)host_client->edict->fields.server->flags & FL_ONGROUND))
  59                 return;
  60
  61         angleval = host_client->edict->fields.server->angles[YAW] * M_PI*2 / 360;
  62         sinval = sin(angleval);
  63         cosval = cos(angleval);
  64
  65         for (i=0 ; i<MAX_FORWARD ; i++)
  66         {
  67                 top[0] = host_client->edict->fields.server->origin[0] + cosval*(i+3)*12;
  68                 top[1] = host_client->edict->fields.server->origin[1] + sinval*(i+3)*12;
  69                 top[2] = host_client->edict->fields.server->origin[2] + host_client->edict->fields.server->view_ofs[2];
  70
  71                 bottom[0] = top[0];
  72                 bottom[1] = top[1];
  73                 bottom[2] = top[2] - 160;
  74
  75                 tr = SV_Move (top, vec3_origin, vec3_origin, bottom, MOVE_NOMONSTERS, host_client->edict, SUPERCONTENTS_SOLID);
  76                 // if looking at a wall, leave ideal the way is was
  77                 if (tr.startsolid)
  78                         return;
  79
  80                 // near a dropoff
  81                 if (tr.fraction == 1)
  82                         return;
  83
  84                 z[i] = top[2] + tr.fraction*(bottom[2]-top[2]);
  85         }
  86
  87         dir = 0;
  88         steps = 0;
  89         for (j=1 ; j<i ; j++)
  90         {
  91                 step = z[j] - z[j-1];
  92                 if (step > -ON_EPSILON && step < ON_EPSILON)
  93                         continue;
  94
  95                 // mixed changes
  96                 if (dir && ( step-dir > ON_EPSILON || step-dir < -ON_EPSILON ) )
  97                         return;
  98
  99                 steps++;
 100                 dir = step;
 101         }
 102
 103         if (!dir)
 104         {
 105                 host_client->edict->fields.server->idealpitch = 0;
 106                 return;
 107         }
 108
 109         if (steps < 2)
 110                 return;
 111         host_client->edict->fields.server->idealpitch = -dir * sv_idealpitchscale.value;
 112 }
 113
 114 static vec3_t wishdir, forward, right, up;
 115 static float wishspeed;
 116
 117 static qboolean onground;
 118
 119 /*
 120 ==================
 121 SV_UserFriction
 122
 123 ==================
 124 */
 125 void SV_UserFriction (void)
 126 {
 127         float speed, newspeed, control, friction;
 128         vec3_t start, stop;
 129         trace_t trace;
 130
 131         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]);
 132         if (!speed)
 133                 return;
 134
 135         // if the leading edge is over a dropoff, increase friction
 136         start[0] = stop[0] = host_client->edict->fields.server->origin[0] + host_client->edict->fields.server->velocity[0]/speed*16;
 137         start[1] = stop[1] = host_client->edict->fields.server->origin[1] + host_client->edict->fields.server->velocity[1]/speed*16;
 138         start[2] = host_client->edict->fields.server->origin[2] + host_client->edict->fields.server->mins[2];
 139         stop[2] = start[2] - 34;
 140
 141         trace = SV_Move (start, vec3_origin, vec3_origin, stop, MOVE_NOMONSTERS, host_client->edict, SV_GenericHitSuperContentsMask(host_client->edict));
 142
 143         if (trace.fraction == 1.0)
 144                 friction = sv_friction.value*sv_edgefriction.value;
 145         else
 146                 friction = sv_friction.value;
 147
 148         // apply friction
 149         control = speed < sv_stopspeed.value ? sv_stopspeed.value : speed;
 150         newspeed = speed - sv.frametime*control*friction;
 151
 152         if (newspeed < 0)
 153                 newspeed = 0;
 154         else
 155                 newspeed /= speed;
 156
 157         VectorScale(host_client->edict->fields.server->velocity, newspeed, host_client->edict->fields.server->velocity);
 158 }
 159
 160 /*
 161 ==============
 162 SV_Accelerate
 163 ==============
 164 */
 165 void SV_Accelerate (void)
 166 {
 167         int i;
 168         float addspeed, accelspeed, currentspeed;
 169
 170         currentspeed = DotProduct (host_client->edict->fields.server->velocity, wishdir);
 171         addspeed = wishspeed - currentspeed;
 172         if (addspeed <= 0)
 173                 return;
 174         accelspeed = sv_accelerate.value*sv.frametime*wishspeed;
 175         if (accelspeed > addspeed)
 176                 accelspeed = addspeed;
 177
 178         for (i=0 ; i<3 ; i++)
 179                 host_client->edict->fields.server->velocity[i] += accelspeed*wishdir[i];
 180 }
 181
 182 void SV_AirAccelerate (vec3_t wishveloc)
 183 {
 184         int i;
 185         float addspeed, wishspd, accelspeed, currentspeed;
 186
 187         wishspd = VectorNormalizeLength (wishveloc);
 188         if (wishspd > sv_maxairspeed.value)
 189                 wishspd = sv_maxairspeed.value;
 190         currentspeed = DotProduct (host_client->edict->fields.server->velocity, wishveloc);
 191         addspeed = wishspd - currentspeed;
 192         if (addspeed <= 0)
 193                 return;
 194         accelspeed = (sv_airaccelerate.value < 0 ? sv_accelerate.value : sv_airaccelerate.value)*wishspeed * sv.frametime;
 195         if (accelspeed > addspeed)
 196                 accelspeed = addspeed;
 197
 198         for (i=0 ; i<3 ; i++)
 199                 host_client->edict->fields.server->velocity[i] += accelspeed*wishveloc[i];
 200 }
 201
 202
 203 void DropPunchAngle (void)
 204 {
 205         float len;
 206         prvm_eval_t *val;
 207
 208         len = VectorNormalizeLength (host_client->edict->fields.server->punchangle);
 209
 210         len -= 10*sv.frametime;
 211         if (len < 0)
 212                 len = 0;
 213         VectorScale (host_client->edict->fields.server->punchangle, len, host_client->edict->fields.server->punchangle);
 214
 215         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.punchvector)))
 216         {
 217                 len = VectorNormalizeLength (val->vector);
 218
 219                 len -= 20*sv.frametime;
 220                 if (len < 0)
 221                         len = 0;
 222                 VectorScale (val->vector, len, val->vector);
 223         }
 224 }
 225
 226 /*
 227 ===================
 228 SV_FreeMove
 229 ===================
 230 */
 231 void SV_FreeMove (void)
 232 {
 233         int i;
 234         float wishspeed;
 235
 236         AngleVectors (host_client->edict->fields.server->v_angle, forward, right, up);
 237
 238         for (i = 0; i < 3; i++)
 239                 host_client->edict->fields.server->velocity[i] = forward[i] * cmd.forwardmove + right[i] * cmd.sidemove;
 240
 241         host_client->edict->fields.server->velocity[2] += cmd.upmove;
 242
 243         wishspeed = VectorLength(host_client->edict->fields.server->velocity);
 244         if (wishspeed > sv_maxspeed.value)
 245                 VectorScale(host_client->edict->fields.server->velocity, sv_maxspeed.value / wishspeed, host_client->edict->fields.server->velocity);
 246 }
 247
 248 /*
 249 ===================
 250 SV_WaterMove
 251
 252 ===================
 253 */
 254 void SV_WaterMove (void)
 255 {
 256         int i;
 257         vec3_t wishvel;
 258         float speed, newspeed, wishspeed, addspeed, accelspeed, temp;
 259
 260         // user intentions
 261         AngleVectors (host_client->edict->fields.server->v_angle, forward, right, up);
 262
 263         for (i=0 ; i<3 ; i++)
 264                 wishvel[i] = forward[i]*cmd.forwardmove + right[i]*cmd.sidemove;
 265
 266         if (!cmd.forwardmove && !cmd.sidemove && !cmd.upmove)
 267                 wishvel[2] -= 60;               // drift towards bottom
 268         else
 269                 wishvel[2] += cmd.upmove;
 270
 271         wishspeed = VectorLength(wishvel);
 272         if (wishspeed > sv_maxspeed.value)
 273         {
 274                 temp = sv_maxspeed.value/wishspeed;
 275                 VectorScale (wishvel, temp, wishvel);
 276                 wishspeed = sv_maxspeed.value;
 277         }
 278         wishspeed *= 0.7;
 279
 280         // water friction
 281         speed = VectorLength(host_client->edict->fields.server->velocity);
 282         if (speed)
 283         {
 284                 newspeed = speed - sv.frametime * speed * (sv_waterfriction.value < 0 ? sv_friction.value : sv_waterfriction.value);
 285                 if (newspeed < 0)
 286                         newspeed = 0;
 287                 temp = newspeed/speed;
 288                 VectorScale(host_client->edict->fields.server->velocity, temp, host_client->edict->fields.server->velocity);
 289         }
 290         else
 291                 newspeed = 0;
 292
 293         // water acceleration
 294         if (!wishspeed)
 295                 return;
 296
 297         addspeed = wishspeed - newspeed;
 298         if (addspeed <= 0)
 299                 return;
 300
 301         VectorNormalize (wishvel);
 302         accelspeed = (sv_wateraccelerate.value < 0 ? sv_accelerate.value : sv_wateraccelerate.value) * wishspeed * sv.frametime;
 303         if (accelspeed > addspeed)
 304                 accelspeed = addspeed;
 305
 306         for (i=0 ; i<3 ; i++)
 307                 host_client->edict->fields.server->velocity[i] += accelspeed * wishvel[i];
 308 }
 309
 310 void SV_WaterJump (void)
 311 {
 312         if (sv.time > host_client->edict->fields.server->teleport_time || !host_client->edict->fields.server->waterlevel)
 313         {
 314                 host_client->edict->fields.server->flags = (int)host_client->edict->fields.server->flags & ~FL_WATERJUMP;
 315                 host_client->edict->fields.server->teleport_time = 0;
 316         }
 317         host_client->edict->fields.server->velocity[0] = host_client->edict->fields.server->movedir[0];
 318         host_client->edict->fields.server->velocity[1] = host_client->edict->fields.server->movedir[1];
 319 }
 320
 321
 322 /*
 323 ===================
 324 SV_AirMove
 325
 326 ===================
 327 */
 328 void SV_AirMove (void)
 329 {
 330         int i;
 331         vec3_t wishvel;
 332         float fmove, smove, temp;
 333
 334         // LordHavoc: correct quake movement speed bug when looking up/down
 335         wishvel[0] = wishvel[2] = 0;
 336         wishvel[1] = host_client->edict->fields.server->angles[1];
 337         AngleVectors (wishvel, forward, right, up);
 338
 339         fmove = cmd.forwardmove;
 340         smove = cmd.sidemove;
 341
 342 // hack to not let you back into teleporter
 343         if (sv.time < host_client->edict->fields.server->teleport_time && fmove < 0)
 344                 fmove = 0;
 345
 346         for (i=0 ; i<3 ; i++)
 347                 wishvel[i] = forward[i]*fmove + right[i]*smove;
 348
 349         if ((int)host_client->edict->fields.server->movetype != MOVETYPE_WALK)
 350                 wishvel[2] += cmd.upmove;
 351
 352         VectorCopy (wishvel, wishdir);
 353         wishspeed = VectorNormalizeLength(wishdir);
 354         if (wishspeed > sv_maxspeed.value)
 355         {
 356                 temp = sv_maxspeed.value/wishspeed;
 357                 VectorScale (wishvel, temp, wishvel);
 358                 wishspeed = sv_maxspeed.value;
 359         }
 360
 361         if (host_client->edict->fields.server->movetype == MOVETYPE_NOCLIP)
 362         {
 363                 // noclip
 364                 VectorCopy (wishvel, host_client->edict->fields.server->velocity);
 365         }
 366         else if (onground && (!sv_gameplayfix_qwplayerphysics.integer || !(host_client->edict->fields.server->button2 || !((int)host_client->edict->fields.server->flags & FL_JUMPRELEASED))))
 367         {
 368                 SV_UserFriction ();
 369                 SV_Accelerate ();
 370         }
 371         else
 372         {
 373                 // not on ground, so little effect on velocity
 374                 SV_AirAccelerate (wishvel);
 375         }
 376 }
 377
 378 /*
 379 ===================
 380 SV_ClientThink
 381
 382 the move fields specify an intended velocity in pix/sec
 383 the angle fields specify an exact angular motion in degrees
 384 ===================
 385 */
 386 extern cvar_t sv_playerphysicsqc;
 387 void SV_ClientThink (void)
 388 {
 389         vec3_t v_angle;
 390
 391         SV_ApplyClientMove();
 392         // make sure the velocity is sane (not a NaN)
 393         SV_CheckVelocity(host_client->edict);
 394
 395         // LordHavoc: QuakeC replacement for SV_ClientThink (player movement)
 396         if (prog->funcoffsets.SV_PlayerPhysics && sv_playerphysicsqc.integer)
 397         {
 398                 prog->globals.server->time = sv.time;
 399                 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
 400                 PRVM_ExecuteProgram (prog->funcoffsets.SV_PlayerPhysics, "QC function SV_PlayerPhysics is missing");
 401                 SV_CheckVelocity(host_client->edict);
 402                 return;
 403         }
 404
 405         if (host_client->edict->fields.server->movetype == MOVETYPE_NONE)
 406                 return;
 407
 408         onground = (int)host_client->edict->fields.server->flags & FL_ONGROUND;
 409
 410         DropPunchAngle ();
 411
 412         // if dead, behave differently
 413         if (host_client->edict->fields.server->health <= 0)
 414                 return;
 415
 416         cmd = host_client->cmd;
 417
 418         // angles
 419         // show 1/3 the pitch angle and all the roll angle
 420         VectorAdd (host_client->edict->fields.server->v_angle, host_client->edict->fields.server->punchangle, v_angle);
 421         host_client->edict->fields.server->angles[ROLL] = V_CalcRoll (host_client->edict->fields.server->angles, host_client->edict->fields.server->velocity)*4;
 422         if (!host_client->edict->fields.server->fixangle)
 423         {
 424                 host_client->edict->fields.server->angles[PITCH] = -v_angle[PITCH]/3;
 425                 host_client->edict->fields.server->angles[YAW] = v_angle[YAW];
 426         }
 427
 428         if ( (int)host_client->edict->fields.server->flags & FL_WATERJUMP )
 429         {
 430                 SV_WaterJump ();
 431                 SV_CheckVelocity(host_client->edict);
 432                 return;
 433         }
 434
 435         /*
 436         // Player is (somehow) outside of the map, or flying, or noclipping
 437         if (host_client->edict->fields.server->movetype != MOVETYPE_NOCLIP && (host_client->edict->fields.server->movetype == MOVETYPE_FLY || SV_TestEntityPosition (host_client->edict)))
 438         //if (host_client->edict->fields.server->movetype == MOVETYPE_NOCLIP || host_client->edict->fields.server->movetype == MOVETYPE_FLY || SV_TestEntityPosition (host_client->edict))
 439         {
 440                 SV_FreeMove ();
 441                 return;
 442         }
 443         */
 444
 445         // walk
 446         if ((host_client->edict->fields.server->waterlevel >= 2) && (host_client->edict->fields.server->movetype != MOVETYPE_NOCLIP))
 447         {
 448                 SV_WaterMove ();
 449                 SV_CheckVelocity(host_client->edict);
 450                 return;
 451         }
 452
 453         SV_AirMove ();
 454         SV_CheckVelocity(host_client->edict);
 455 }
 456
 457 /*
 458 ===================
 459 SV_ReadClientMove
 460 ===================
 461 */
 462 int sv_numreadmoves = 0;
 463 usercmd_t sv_readmoves[CL_MAX_USERCMDS];
 464 void SV_ReadClientMove (void)
 465 {
 466         int i;
 467         usercmd_t newmove;
 468         usercmd_t *move = &newmove;
 469
 470         memset(move, 0, sizeof(*move));
 471
 472         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 473
 474         // read ping time
 475         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)
 476                 move->sequence = MSG_ReadLong ();
 477         move->time = MSG_ReadFloat ();
 478         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 479         move->receivetime = (float)sv.time;
 480
 481 #if DEBUGMOVES
 482         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);
 483 #endif
 484         // limit reported time to current time
 485         // (incase the client is trying to cheat)
 486         move->time = min(move->time, move->receivetime + sv.frametime);
 487
 488         // read current angles
 489         for (i = 0;i < 3;i++)
 490         {
 491                 if (sv.protocol == PROTOCOL_QUAKE || sv.protocol == PROTOCOL_QUAKEDP || sv.protocol == PROTOCOL_NEHAHRAMOVIE)
 492                         move->viewangles[i] = MSG_ReadAngle8i();
 493                 else if (sv.protocol == PROTOCOL_DARKPLACES1)
 494                         move->viewangles[i] = MSG_ReadAngle16i();
 495                 else if (sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3)
 496                         move->viewangles[i] = MSG_ReadAngle32f();
 497                 else
 498                         move->viewangles[i] = MSG_ReadAngle16i();
 499         }
 500         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 501
 502         // read movement
 503         move->forwardmove = MSG_ReadCoord16i ();
 504         move->sidemove = MSG_ReadCoord16i ();
 505         move->upmove = MSG_ReadCoord16i ();
 506         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 507
 508         // read buttons
 509         // be sure to bitwise OR them into the move->buttons because we want to
 510         // accumulate button presses from multiple packets per actual move
 511         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)
 512                 move->buttons = MSG_ReadByte ();
 513         else
 514                 move->buttons = MSG_ReadLong ();
 515         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 516
 517         // read impulse
 518         move->impulse = MSG_ReadByte ();
 519         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 520
 521         // PRYDON_CLIENTCURSOR
 522         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)
 523         {
 524                 // 30 bytes
 525                 move->cursor_screen[0] = MSG_ReadShort() * (1.0f / 32767.0f);
 526                 move->cursor_screen[1] = MSG_ReadShort() * (1.0f / 32767.0f);
 527                 move->cursor_start[0] = MSG_ReadFloat();
 528                 move->cursor_start[1] = MSG_ReadFloat();
 529                 move->cursor_start[2] = MSG_ReadFloat();
 530                 move->cursor_impact[0] = MSG_ReadFloat();
 531                 move->cursor_impact[1] = MSG_ReadFloat();
 532                 move->cursor_impact[2] = MSG_ReadFloat();
 533                 move->cursor_entitynumber = (unsigned short)MSG_ReadShort();
 534                 if (move->cursor_entitynumber >= prog->max_edicts)
 535                 {
 536                         Con_DPrintf("SV_ReadClientMessage: client send bad cursor_entitynumber\n");
 537                         move->cursor_entitynumber = 0;
 538                 }
 539                 // as requested by FrikaC, cursor_trace_ent is reset to world if the
 540                 // entity is free at time of receipt
 541                 if (PRVM_EDICT_NUM(move->cursor_entitynumber)->priv.server->free)
 542                         move->cursor_entitynumber = 0;
 543                 if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 544         }
 545
 546         // if the previous move has not been applied yet, we need to accumulate
 547         // the impulse/buttons from it
 548         if (!host_client->cmd.applied)
 549         {
 550                 if (!move->impulse)
 551                         move->impulse = host_client->cmd.impulse;
 552                 move->buttons |= host_client->cmd.buttons;
 553         }
 554
 555         // now store this move for later execution
 556         // (we have to buffer the moves because of old ones being repeated)
 557         if (sv_numreadmoves < CL_MAX_USERCMDS)
 558                 sv_readmoves[sv_numreadmoves++] = *move;
 559 }
 560
 561 void SV_ExecuteClientMoves(void)
 562 {
 563         int moveindex;
 564         float moveframetime;
 565         double oldframetime;
 566         double oldframetime2;
 567 #ifdef NUM_PING_TIMES
 568         double total;
 569 #endif
 570         prvm_eval_t *val;
 571         if (sv_numreadmoves < 1)
 572                 return;
 573         // only start accepting input once the player is spawned
 574         if (!host_client->spawned)
 575                 return;
 576 #if DEBUGMOVES
 577         Con_Printf("SV_ExecuteClientMoves: read %i moves at sv.time %f\n", sv_numreadmoves, (float)sv.time);
 578 #endif
 579         // disable clientside movement prediction in some cases
 580         if (ceil(max(sv_readmoves[sv_numreadmoves-1].receivetime - sv_readmoves[sv_numreadmoves-1].time, 0) * 1000.0) < sv_clmovement_minping.integer)
 581                 host_client->clmovement_disabletimeout = realtime + sv_clmovement_minping_disabletime.value / 1000.0;
 582         // several conditions govern whether clientside movement prediction is allowed
 583         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))
 584         {
 585                 // process the moves in order and ignore old ones
 586                 // but always trust the latest move
 587                 // (this deals with bogus initial move sequences after level change,
 588                 //  where the client will eventually catch up with the level change
 589                 //  and reset its move sequence)
 590                 for (moveindex = 0;moveindex < sv_numreadmoves;moveindex++)
 591                 {
 592                         usercmd_t *move = sv_readmoves + moveindex;
 593                         if (host_client->movesequence < move->sequence || moveindex == sv_numreadmoves - 1)
 594                         {
 595 #if DEBUGMOVES
 596                                 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);
 597 #endif
 598                                 // this is a new move
 599                                 moveframetime = bound(0, move->time - host_client->cmd.time, 0.1);
 600                                 //Con_Printf("movesequence = %i (%i lost), moveframetime = %f\n", move->sequence, move->sequence ? move->sequence - host_client->movesequence - 1 : 0, moveframetime);
 601                                 host_client->cmd = *move;
 602                                 host_client->movesequence = move->sequence;
 603
 604                                 // if using prediction, we need to perform moves when packets are
 605                                 // received, even if multiple occur in one frame
 606                                 // (they can't go beyond the current time so there is no cheat issue
 607                                 //  with this approach, and if they don't send input for a while they
 608                                 //  start moving anyway, so the longest 'lagaport' possible is
 609                                 //  determined by the sv_clmovement_waitforinput cvar)
 610                                 if (moveframetime <= 0)
 611                                         continue;
 612                                 oldframetime = prog->globals.server->frametime;
 613                                 oldframetime2 = sv.frametime;
 614                                 // update ping time for qc to see while executing this move
 615                                 host_client->ping = host_client->cmd.receivetime - host_client->cmd.time;
 616                                 // the server and qc frametime values must be changed temporarily
 617                                 prog->globals.server->frametime = sv.frametime = moveframetime;
 618                                 // if move is more than 50ms, split it into two moves (this matches QWSV behavior and the client prediction)
 619                                 if (sv.frametime > 0.05)
 620                                 {
 621                                         prog->globals.server->frametime = sv.frametime = moveframetime * 0.5f;
 622                                         SV_Physics_ClientMove();
 623                                 }
 624                                 SV_Physics_ClientMove();
 625                                 sv.frametime = oldframetime2;
 626                                 prog->globals.server->frametime = oldframetime;
 627                                 host_client->clmovement_skipphysicsframes = sv_clmovement_waitforinput.integer;
 628                         }
 629                 }
 630         }
 631         else
 632         {
 633                 // try to gather button bits from old moves, but only if their time is
 634                 // advancing (ones with the same timestamp can't be trusted)
 635                 for (moveindex = 0;moveindex < sv_numreadmoves-1;moveindex++)
 636                 {
 637                         usercmd_t *move = sv_readmoves + moveindex;
 638                         if (host_client->cmd.time < move->time)
 639                         {
 640                                 sv_readmoves[sv_numreadmoves-1].buttons |= move->buttons;
 641                                 if (move->impulse)
 642                                         sv_readmoves[sv_numreadmoves-1].impulse = move->impulse;
 643                         }
 644                 }
 645                 // now copy the new move
 646                 host_client->cmd = sv_readmoves[sv_numreadmoves-1];
 647                 host_client->movesequence = 0;
 648                 // make sure that normal physics takes over immediately
 649                 host_client->clmovement_skipphysicsframes = 0;
 650         }
 651
 652         // calculate average ping time
 653         host_client->ping = host_client->cmd.receivetime - host_client->cmd.time;
 654 #ifdef NUM_PING_TIMES
 655         host_client->ping_times[host_client->num_pings % NUM_PING_TIMES] = host_client->cmd.receivetime - host_client->cmd.time;
 656         host_client->num_pings++;
 657         for (i=0, total = 0;i < NUM_PING_TIMES;i++)
 658                 total += host_client->ping_times[i];
 659         host_client->ping = total / NUM_PING_TIMES;
 660 #endif
 661 }
 662
 663 void SV_ApplyClientMove (void)
 664 {
 665         prvm_eval_t *val;
 666         usercmd_t *move = &host_client->cmd;
 667
 668         if (!move->receivetime)
 669                 return;
 670
 671         // note: a move can be applied multiple times if the client packets are
 672         // not coming as often as the physics is executed, and the move must be
 673         // applied before running qc each time because the id1 qc had a bug where
 674         // it clears self.button2 in PlayerJump, causing pogostick behavior if
 675         // moves are not applied every time before calling qc
 676         move->applied = true;
 677
 678         // set the edict fields
 679         host_client->edict->fields.server->button0 = move->buttons & 1;
 680         host_client->edict->fields.server->button2 = (move->buttons & 2)>>1;
 681         if (move->impulse)
 682                 host_client->edict->fields.server->impulse = move->impulse;
 683         // only send the impulse to qc once
 684         move->impulse = 0;
 685         VectorCopy(move->viewangles, host_client->edict->fields.server->v_angle);
 686         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button3))) val->_float = ((move->buttons >> 2) & 1);
 687         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button4))) val->_float = ((move->buttons >> 3) & 1);
 688         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button5))) val->_float = ((move->buttons >> 4) & 1);
 689         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button6))) val->_float = ((move->buttons >> 5) & 1);
 690         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button7))) val->_float = ((move->buttons >> 6) & 1);
 691         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button8))) val->_float = ((move->buttons >> 7) & 1);
 692         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button9))) val->_float = ((move->buttons >> 11) & 1);
 693         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button10))) val->_float = ((move->buttons >> 12) & 1);
 694         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button11))) val->_float = ((move->buttons >> 13) & 1);
 695         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button12))) val->_float = ((move->buttons >> 14) & 1);
 696         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button13))) val->_float = ((move->buttons >> 15) & 1);
 697         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button14))) val->_float = ((move->buttons >> 16) & 1);
 698         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button15))) val->_float = ((move->buttons >> 17) & 1);
 699         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.button16))) val->_float = ((move->buttons >> 18) & 1);
 700         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.buttonuse))) val->_float = ((move->buttons >> 8) & 1);
 701         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.buttonchat))) val->_float = ((move->buttons >> 9) & 1);
 702         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_active))) val->_float = ((move->buttons >> 10) & 1);
 703         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.movement))) VectorSet(val->vector, move->forwardmove, move->sidemove, move->upmove);
 704         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_screen))) VectorCopy(move->cursor_screen, val->vector);
 705         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_trace_start))) VectorCopy(move->cursor_start, val->vector);
 706         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_trace_endpos))) VectorCopy(move->cursor_impact, val->vector);
 707         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.cursor_trace_ent))) val->edict = PRVM_EDICT_TO_PROG(PRVM_EDICT_NUM(move->cursor_entitynumber));
 708         if ((val = PRVM_EDICTFIELDVALUE(host_client->edict, prog->fieldoffsets.ping))) val->_float = host_client->ping * 1000.0;
 709 }
 710
 711 void SV_FrameLost(int framenum)
 712 {
 713         if (host_client->entitydatabase5)
 714                 EntityFrame5_LostFrame(host_client->entitydatabase5, framenum);
 715 }
 716
 717 void SV_FrameAck(int framenum)
 718 {
 719         if (host_client->entitydatabase)
 720                 EntityFrame_AckFrame(host_client->entitydatabase, framenum);
 721         else if (host_client->entitydatabase4)
 722                 EntityFrame4_AckFrame(host_client->entitydatabase4, framenum, true);
 723         else if (host_client->entitydatabase5)
 724                 EntityFrame5_AckFrame(host_client->entitydatabase5, framenum);
 725 }
 726
 727 /*
 728 ===================
 729 SV_ReadClientMessage
 730 ===================
 731 */
 732 extern void SV_SendServerinfo(client_t *client);
 733 extern sizebuf_t vm_tempstringsbuf;
 734 void SV_ReadClientMessage(void)
 735 {
 736         int cmd, num, start;
 737         char *s;
 738
 739         //MSG_BeginReading ();
 740         sv_numreadmoves = 0;
 741
 742         for(;;)
 743         {
 744                 if (!host_client->active)
 745                 {
 746                         // a command caused an error
 747                         SV_DropClient (false);
 748                         return;
 749                 }
 750
 751                 if (msg_badread)
 752                 {
 753                         Con_Print("SV_ReadClientMessage: badread\n");
 754                         SV_DropClient (false);
 755                         return;
 756                 }
 757
 758                 cmd = MSG_ReadByte ();
 759                 if (cmd == -1)
 760                 {
 761                         // end of message
 762                         // apply the moves that were read this frame
 763                         SV_ExecuteClientMoves();
 764                         break;
 765                 }
 766
 767                 switch (cmd)
 768                 {
 769                 default:
 770                         Con_Printf("SV_ReadClientMessage: unknown command char %i\n", cmd);
 771                         SV_DropClient (false);
 772                         return;
 773
 774                 case clc_nop:
 775                         break;
 776
 777                 case clc_stringcmd:
 778                         s = MSG_ReadString ();
 779                         if (strncasecmp(s, "spawn", 5) == 0
 780                          || strncasecmp(s, "begin", 5) == 0
 781                          || strncasecmp(s, "prespawn", 8) == 0)
 782                                 Cmd_ExecuteString (s, src_client);
 783                         else if (prog->funcoffsets.SV_ParseClientCommand)
 784                         {
 785                                 int restorevm_tempstringsbuf_cursize;
 786                                 restorevm_tempstringsbuf_cursize = vm_tempstringsbuf.cursize;
 787                                 PRVM_G_INT(OFS_PARM0) = PRVM_SetTempString(s);
 788                                 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
 789                                 PRVM_ExecuteProgram (prog->funcoffsets.SV_ParseClientCommand, "QC function SV_ParseClientCommand is missing");
 790                                 vm_tempstringsbuf.cursize = restorevm_tempstringsbuf_cursize;
 791                         }
 792                         else
 793                                 Cmd_ExecuteString (s, src_client);
 794                         break;
 795
 796                 case clc_disconnect:
 797                         SV_DropClient (false); // client wants to disconnect
 798                         return;
 799
 800                 case clc_move:
 801                         SV_ReadClientMove();
 802                         break;
 803
 804                 case clc_ackdownloaddata:
 805                         start = MSG_ReadLong();
 806                         num = MSG_ReadShort();
 807                         if (host_client->download_file && host_client->download_started)
 808                         {
 809                                 if (host_client->download_expectedposition == start)
 810                                 {
 811                                         int size = (int)FS_FileSize(host_client->download_file);
 812                                         // a data block was successfully received by the client,
 813                                         // update the expected position on the next data block
 814                                         host_client->download_expectedposition = start + num;
 815                                         // if this was the last data block of the file, it's done
 816                                         if (host_client->download_expectedposition >= FS_FileSize(host_client->download_file))
 817                                         {
 818                                                 // tell the client that the download finished
 819                                                 // we need to calculate the crc now
 820                                                 //
 821                                                 // note: at this point the OS probably has the file
 822                                                 // entirely in memory, so this is a faster operation
 823                                                 // now than it was when the download started.
 824                                                 //
 825                                                 // it is also preferable to do this at the end of the
 826                                                 // download rather than the start because it reduces
 827                                                 // potential for Denial Of Service attacks against the
 828                                                 // server.
 829                                                 int crc;
 830                                                 unsigned char *temp;
 831                                                 FS_Seek(host_client->download_file, 0, SEEK_SET);
 832                                                 temp = Mem_Alloc(tempmempool, size);
 833                                                 FS_Read(host_client->download_file, temp, size);
 834                                                 crc = CRC_Block(temp, size);
 835                                                 Mem_Free(temp);
 836                                                 // calculated crc, send the file info to the client
 837                                                 // (so that it can verify the data)
 838                                                 Host_ClientCommands(va("\ncl_downloadfinished %i %i %s\n", size, crc, host_client->download_name));
 839                                                 Con_DPrintf("Download of %s by %s has finished\n", host_client->download_name, host_client->name);
 840                                                 FS_Close(host_client->download_file);
 841                                                 host_client->download_file = NULL;
 842                                                 host_client->download_name[0] = 0;
 843                                                 host_client->download_expectedposition = 0;
 844                                                 host_client->download_started = false;
 845                                         }
 846                                 }
 847                                 else
 848                                 {
 849                                         // a data block was lost, reset to the expected position
 850                                         // and resume sending from there
 851                                         FS_Seek(host_client->download_file, host_client->download_expectedposition, SEEK_SET);
 852                                 }
 853                         }
 854                         break;
 855
 856                 case clc_ackframe:
 857                         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 858                         num = MSG_ReadLong();
 859                         if (msg_badread) Con_Printf("SV_ReadClientMessage: badread at %s:%i\n", __FILE__, __LINE__);
 860                         if (developer_networkentities.integer >= 10)
 861                                 Con_Printf("recv clc_ackframe %i\n", num);
 862                         // if the client hasn't progressed through signons yet,
 863                         // ignore any clc_ackframes we get (they're probably from the
 864                         // previous level)
 865                         if (host_client->spawned && host_client->latestframenum < num)
 866                         {
 867                                 int i;
 868                                 for (i = host_client->latestframenum + 1;i < num;i++)
 869                                         SV_FrameLost(i);
 870                                 SV_FrameAck(num);
 871                                 host_client->latestframenum = num;
 872                         }
 873                         break;
 874                 }
 875         }
 876 }
 877