qcsrc/server/cl_physics.qc

   1 #include "_all.qh"
   2 #include "bot/bot.qh"
   3 #include "g_damage.qh"
   4
   5 #if defined(CSQC)
   6 #elif defined(MENUQC)
   7 #elif defined(SVQC)
   8         #include "../dpdefs/progsdefs.qh"
   9     #include "../dpdefs/dpextensions.qh"
  10     #include "../warpzonelib/mathlib.qh"
  11     #include "../warpzonelib/server.qh"
  12     #include "../common/constants.qh"
  13     #include "../common/util.qh"
  14     #include "../common/animdecide.qh"
  15     #include "../common/monsters/sv_monsters.qh"
  16     #include "../common/weapons/all.qh"
  17     #include "t_items.qh"
  18     #include "autocvars.qh"
  19     #include "defs.qh"
  20     #include "../common/notifications.qh"
  21     #include "mutators/mutators_include.qh"
  22     #include "../common/mapinfo.qh"
  23     #include "../csqcmodellib/sv_model.qh"
  24     #include "anticheat.qh"
  25     #include "cheats.qh"
  26     #include "g_hook.qh"
  27     #include "race.qh"
  28     #include "playerdemo.qh"
  29 #endif
  30
  31 .float race_penalty;
  32 .float restart_jump;
  33
  34 .float ladder_time;
  35 .entity ladder_entity;
  36 .float gravity;
  37 .float swamp_slowdown;
  38 .int lastflags;
  39 .float lastground;
  40 .float wasFlying;
  41 .float spectatorspeed;
  42
  43 /*
  44 =============
  45 PlayerJump
  46
  47 When you press the jump key
  48 returns true if handled
  49 =============
  50 */
  51 float PlayerJump (void)
  52 {
  53         if(self.frozen)
  54                 return true; // no jumping in freezetag when frozen
  55
  56         if(self.player_blocked)
  57                 return true; // no jumping while blocked
  58
  59         float doublejump = false;
  60         float mjumpheight = autocvar_sv_jumpvelocity;
  61
  62         player_multijump = doublejump;
  63         player_jumpheight = mjumpheight;
  64         if(MUTATOR_CALLHOOK(PlayerJump))
  65                 return true;
  66
  67         doublejump = player_multijump;
  68         mjumpheight = player_jumpheight;
  69
  70         if (autocvar_sv_doublejump)
  71         {
  72                 tracebox(self.origin + '0 0 0.01', self.mins, self.maxs, self.origin - '0 0 0.01', MOVE_NORMAL, self);
  73                 if (trace_fraction < 1 && trace_plane_normal.z > 0.7)
  74                 {
  75                         doublejump = true;
  76
  77                         // we MUST clip velocity here!
  78                         float f;
  79                         f = self.velocity * trace_plane_normal;
  80                         if(f < 0)
  81                                 self.velocity -= f * trace_plane_normal;
  82                 }
  83         }
  84
  85         if (self.waterlevel >= WATERLEVEL_SWIMMING)
  86         {
  87                 self.velocity_z = self.stat_sv_maxspeed * 0.7;
  88                 return true;
  89         }
  90
  91         if (!doublejump)
  92                 if (!(self.flags & FL_ONGROUND))
  93                         return !(self.flags & FL_JUMPRELEASED);
  94
  95         if(self.cvar_cl_movement_track_canjump)
  96                 if (!(self.flags & FL_JUMPRELEASED))
  97                         return true;
  98
  99         // sv_jumpspeedcap_min/sv_jumpspeedcap_max act as baseline
 100         // velocity bounds.  Final velocity is bound between (jumpheight *
 101         // min + jumpheight) and (jumpheight * max + jumpheight);
 102
 103         if(autocvar_sv_jumpspeedcap_min != "")
 104         {
 105                 float minjumpspeed;
 106
 107                 minjumpspeed = mjumpheight * stof(autocvar_sv_jumpspeedcap_min);
 108
 109                 if (self.velocity.z < minjumpspeed)
 110                         mjumpheight += minjumpspeed - self.velocity.z;
 111         }
 112
 113         if(autocvar_sv_jumpspeedcap_max != "")
 114         {
 115                 // don't do jump speedcaps on ramps to preserve old xonotic ramjump style
 116                 tracebox(self.origin + '0 0 0.01', self.mins, self.maxs, self.origin - '0 0 0.01', MOVE_NORMAL, self);
 117
 118                 if(!(trace_fraction < 1 && trace_plane_normal.z < 0.98 && autocvar_sv_jumpspeedcap_max_disable_on_ramps))
 119                 {
 120                         float maxjumpspeed;
 121
 122                         maxjumpspeed = mjumpheight * stof(autocvar_sv_jumpspeedcap_max);
 123
 124                         if (self.velocity.z > maxjumpspeed)
 125                                 mjumpheight -= self.velocity.z - maxjumpspeed;
 126                 }
 127         }
 128
 129         if(!(self.lastflags & FL_ONGROUND))
 130         {
 131                 if(autocvar_speedmeter)
 132                         dprint(strcat("landing velocity: ", vtos(self.velocity), " (abs: ", ftos(vlen(self.velocity)), ")\n"));
 133                 if(self.lastground < time - 0.3)
 134                 {
 135                         self.velocity_x *= (1 - autocvar_sv_friction_on_land);
 136                         self.velocity_y *= (1 - autocvar_sv_friction_on_land);
 137                 }
 138                 if(self.jumppadcount > 1)
 139                         dprint(strcat(ftos(self.jumppadcount), "x jumppad combo\n"));
 140                 self.jumppadcount = 0;
 141         }
 142
 143         self.velocity_z = self.velocity.z + mjumpheight;
 144         self.oldvelocity_z = self.velocity.z;
 145
 146         self.flags &= ~FL_ONGROUND;
 147         self.flags &= ~FL_JUMPRELEASED;
 148
 149         animdecide_setaction(self, ANIMACTION_JUMP, true);
 150
 151         if(autocvar_g_jump_grunt)
 152                 PlayerSound(playersound_jump, CH_PLAYER, VOICETYPE_PLAYERSOUND);
 153
 154         self.restart_jump = -1; // restart jump anim next time
 155         // value -1 is used to not use the teleport bit (workaround for tiny hitch when re-jumping)
 156         return true;
 157 }
 158 void CheckWaterJump()
 159 {
 160         vector start, end;
 161
 162 // check for a jump-out-of-water
 163         makevectors (self.angles);
 164         start = self.origin;
 165         start.z = start.z + 8;
 166         v_forward.z = 0;
 167         normalize(v_forward);
 168         end = start + v_forward*24;
 169         traceline (start, end, true, self);
 170         if (trace_fraction < 1)
 171         {       // solid at waist
 172                 start.z = start.z + self.maxs.z - 8;
 173                 end = start + v_forward*24;
 174                 self.movedir = trace_plane_normal * -50;
 175                 traceline (start, end, true, self);
 176                 if (trace_fraction == 1)
 177                 {       // open at eye level
 178                         self.flags |= FL_WATERJUMP;
 179                         self.velocity_z = 225;
 180                         self.flags &= ~FL_JUMPRELEASED;
 181                         self.teleport_time = time + 2;  // safety net
 182                         return;
 183                 }
 184         }
 185 }
 186
 187 .float jetpack_stopped;
 188 // Hack: shouldn't need to know about this
 189 .float multijump_count;
 190 void CheckPlayerJump()
 191 {
 192         float was_flying = self.items & IT_USING_JETPACK;
 193
 194         if (self.cvar_cl_jetpack_jump < 2)
 195                 self.items &= ~IT_USING_JETPACK;
 196
 197         if (self.BUTTON_JUMP || self.BUTTON_JETPACK)
 198         {
 199                 float air_jump = !PlayerJump() || self.multijump_count > 0; // PlayerJump() has important side effects
 200                 float activate = self.cvar_cl_jetpack_jump && air_jump && self.BUTTON_JUMP || self.BUTTON_JETPACK;
 201                 float has_fuel = !autocvar_g_jetpack_fuel || self.ammo_fuel || self.items & IT_UNLIMITED_WEAPON_AMMO;
 202                 if (!(self.items & IT_JETPACK)) { }
 203                 else if (self.jetpack_stopped) { }
 204                 else if (!has_fuel)
 205                 {
 206                         if (was_flying) // TODO: ran out of fuel message
 207                                 Send_Notification(NOTIF_ONE, self, MSG_INFO, INFO_JETPACK_NOFUEL);
 208                         else if (activate)
 209                                 Send_Notification(NOTIF_ONE, self, MSG_INFO, INFO_JETPACK_NOFUEL);
 210                         self.jetpack_stopped = true;
 211                         self.items &= ~IT_USING_JETPACK;
 212                 }
 213                 else if (activate && !self.frozen)
 214                         self.items |= IT_USING_JETPACK;
 215         }
 216         else
 217         {
 218                 self.jetpack_stopped = false;
 219                 self.items &= ~IT_USING_JETPACK;
 220         }
 221         if (!self.BUTTON_JUMP)
 222                 self.flags |= FL_JUMPRELEASED;
 223
 224         if (self.waterlevel == WATERLEVEL_SWIMMING)
 225                 CheckWaterJump ();
 226 }
 227
 228 float racecar_angle(float forward, float down)
 229 {
 230         float ret, angle_mult;
 231
 232         if(forward < 0)
 233         {
 234                 forward = -forward;
 235                 down = -down;
 236         }
 237
 238         ret = vectoyaw('0 1 0' * down + '1 0 0' * forward);
 239
 240         angle_mult = forward / (800 + forward);
 241
 242         if(ret > 180)
 243                 return ret * angle_mult + 360 * (1 - angle_mult);
 244         else
 245                 return ret * angle_mult;
 246 }
 247
 248 void RaceCarPhysics()
 249 {
 250         // using this move type for "big rigs"
 251         // the engine does not push the entity!
 252
 253         float accel, steer, f, myspeed, steerfactor;
 254         vector angles_save, rigvel;
 255
 256         angles_save = self.angles;
 257         accel = bound(-1, self.movement.x / self.stat_sv_maxspeed, 1);
 258         steer = bound(-1, self.movement.y / self.stat_sv_maxspeed, 1);
 259
 260         if(g_bugrigs_reverse_speeding)
 261         {
 262                 if(accel < 0)
 263                 {
 264                         // back accel is DIGITAL
 265                         // to prevent speedhack
 266                         if(accel < -0.5)
 267                                 accel = -1;
 268                         else
 269                                 accel = 0;
 270                 }
 271         }
 272
 273         self.angles_x = 0;
 274         self.angles_z = 0;
 275         makevectors(self.angles); // new forward direction!
 276
 277         if(self.flags & FL_ONGROUND || g_bugrigs_air_steering)
 278         {
 279                 float upspeed, accelfactor;
 280
 281                 myspeed = self.velocity * v_forward;
 282                 upspeed = self.velocity * v_up;
 283
 284                 // responsiveness factor for steering and acceleration
 285                 f = 1 / (1 + pow(max(-myspeed, myspeed) / g_bugrigs_speed_ref, g_bugrigs_speed_pow));
 286                 //MAXIMA: f(v) := 1 / (1 + (v / g_bugrigs_speed_ref) ^ g_bugrigs_speed_pow);
 287
 288                 if(myspeed < 0 && g_bugrigs_reverse_spinning)
 289                         steerfactor = -myspeed * g_bugrigs_steer;
 290                 else
 291                         steerfactor = -myspeed * f * g_bugrigs_steer;
 292
 293                 if(myspeed < 0 && g_bugrigs_reverse_speeding)
 294                         accelfactor = g_bugrigs_accel;
 295                 else
 296                         accelfactor = f * g_bugrigs_accel;
 297                 //MAXIMA: accel(v) := f(v) * g_bugrigs_accel;
 298
 299                 if(accel < 0)
 300                 {
 301                         if(myspeed > 0)
 302                         {
 303                                 myspeed = max(0, myspeed - frametime * (g_bugrigs_friction_floor - g_bugrigs_friction_brake * accel));
 304                         }
 305                         else
 306                         {
 307                                 if(!g_bugrigs_reverse_speeding)
 308                                         myspeed = min(0, myspeed + frametime * g_bugrigs_friction_floor);
 309                         }
 310                 }
 311                 else
 312                 {
 313                         if(myspeed >= 0)
 314                         {
 315                                 myspeed = max(0, myspeed - frametime * g_bugrigs_friction_floor);
 316                         }
 317                         else
 318                         {
 319                                 if(g_bugrigs_reverse_stopping)
 320                                         myspeed = 0;
 321                                 else
 322                                         myspeed = min(0, myspeed + frametime * (g_bugrigs_friction_floor + g_bugrigs_friction_brake * accel));
 323                         }
 324                 }
 325                 // terminal velocity = velocity at which 50 == accelfactor, that is, 1549 units/sec
 326                 //MAXIMA: friction(v) := g_bugrigs_friction_floor;
 327
 328                 self.angles_y += steer * frametime * steerfactor; // apply steering
 329                 makevectors(self.angles); // new forward direction!
 330
 331                 myspeed += accel * accelfactor * frametime;
 332
 333                 rigvel = myspeed * v_forward + '0 0 1' * upspeed;
 334         }
 335         else
 336         {
 337                 myspeed = vlen(self.velocity);
 338
 339                 // responsiveness factor for steering and acceleration
 340                 f = 1 / (1 + pow(max(0, myspeed / g_bugrigs_speed_ref), g_bugrigs_speed_pow));
 341                 steerfactor = -myspeed * f;
 342                 self.angles_y += steer * frametime * steerfactor; // apply steering
 343
 344                 rigvel = self.velocity;
 345                 makevectors(self.angles); // new forward direction!
 346         }
 347
 348         rigvel = rigvel * max(0, 1 - vlen(rigvel) * g_bugrigs_friction_air * frametime);
 349         //MAXIMA: airfriction(v) := v * v * g_bugrigs_friction_air;
 350         //MAXIMA: total_acceleration(v) := accel(v) - friction(v) - airfriction(v);
 351         //MAXIMA: solve(total_acceleration(v) = 0, v);
 352
 353         if(g_bugrigs_planar_movement)
 354         {
 355                 vector rigvel_xy, neworigin, up;
 356                 float mt;
 357
 358                 rigvel.z -= frametime * autocvar_sv_gravity; // 4x gravity plays better
 359                 rigvel_xy = vec2(rigvel);
 360
 361                 if(g_bugrigs_planar_movement_car_jumping)
 362                         mt = MOVE_NORMAL;
 363                 else
 364                         mt = MOVE_NOMONSTERS;
 365
 366                 tracebox(self.origin, self.mins, self.maxs, self.origin + '0 0 1024', mt, self);
 367                 up = trace_endpos - self.origin;
 368
 369                 // BUG RIGS: align the move to the surface instead of doing collision testing
 370                 // can we move?
 371                 tracebox(trace_endpos, self.mins, self.maxs, trace_endpos + rigvel_xy * frametime, mt, self);
 372
 373                 // align to surface
 374                 tracebox(trace_endpos, self.mins, self.maxs, trace_endpos - up + '0 0 1' * rigvel.z * frametime, mt, self);
 375
 376                 if(trace_fraction < 0.5)
 377                 {
 378                         trace_fraction = 1;
 379                         neworigin = self.origin;
 380                 }
 381                 else
 382                         neworigin = trace_endpos;
 383
 384                 if(trace_fraction < 1)
 385                 {
 386                         // now set angles_x so that the car points parallel to the surface
 387                         self.angles = vectoangles(
 388                                         '1 0 0' * v_forward.x * trace_plane_normal.z
 389                                         +
 390                                         '0 1 0' * v_forward.y * trace_plane_normal.z
 391                                         +
 392                                         '0 0 1' * -(v_forward.x * trace_plane_normal.x + v_forward.y * trace_plane_normal.y)
 393                                         );
 394                         self.flags |= FL_ONGROUND;
 395                 }
 396                 else
 397                 {
 398                         // now set angles_x so that the car points forward, but is tilted in velocity direction
 399                         self.flags &= ~FL_ONGROUND;
 400                 }
 401
 402                 self.velocity = (neworigin - self.origin) * (1.0 / frametime);
 403                 self.movetype = MOVETYPE_NOCLIP;
 404         }
 405         else
 406         {
 407                 rigvel.z -= frametime * autocvar_sv_gravity; // 4x gravity plays better
 408                 self.velocity = rigvel;
 409                 self.movetype = MOVETYPE_FLY;
 410         }
 411
 412         trace_fraction = 1;
 413         tracebox(self.origin, self.mins, self.maxs, self.origin - '0 0 4', MOVE_NORMAL, self);
 414         if(trace_fraction != 1)
 415         {
 416                 self.angles = vectoangles2(
 417                                 '1 0 0' * v_forward.x * trace_plane_normal.z
 418                                 +
 419                                 '0 1 0' * v_forward.y * trace_plane_normal.z
 420                                 +
 421                                 '0 0 1' * -(v_forward.x * trace_plane_normal.x + v_forward.y * trace_plane_normal.y),
 422                                 trace_plane_normal
 423                                 );
 424         }
 425         else
 426         {
 427                 vector vel_local;
 428
 429                 vel_local.x = v_forward * self.velocity;
 430                 vel_local.y = v_right * self.velocity;
 431                 vel_local.z = v_up * self.velocity;
 432
 433                 self.angles_x = racecar_angle(vel_local.x, vel_local.z);
 434                 self.angles_z = racecar_angle(-vel_local.y, vel_local.z);
 435         }
 436
 437         // smooth the angles
 438         vector vf1, vu1, smoothangles;
 439         makevectors(self.angles);
 440         f = bound(0, frametime * g_bugrigs_angle_smoothing, 1);
 441         if(f == 0)
 442                 f = 1;
 443         vf1 = v_forward * f;
 444         vu1 = v_up * f;
 445         makevectors(angles_save);
 446         vf1 = vf1 + v_forward * (1 - f);
 447         vu1 = vu1 + v_up * (1 - f);
 448         smoothangles = vectoangles2(vf1, vu1);
 449         self.angles_x = -smoothangles.x;
 450         self.angles_z =  smoothangles.z;
 451 }
 452
 453 float IsMoveInDirection(vector mv, float angle) // key mix factor
 454 {
 455         if(mv.x == 0 && mv.y == 0)
 456                 return 0; // avoid division by zero
 457         angle -= RAD2DEG * atan2(mv.y, mv.x);
 458         angle = remainder(angle, 360) / 45;
 459         if(angle >  1)
 460                 return 0;
 461         if(angle < -1)
 462                 return 0;
 463         return 1 - fabs(angle);
 464 }
 465
 466 float GeomLerp(float a, float lerp, float b)
 467 {
 468         if(a == 0)
 469         {
 470                 if(lerp < 1)
 471                         return 0;
 472                 else
 473                         return b;
 474         }
 475         if(b == 0)
 476         {
 477                 if(lerp > 0)
 478                         return 0;
 479                 else
 480                         return a;
 481         }
 482         return a * pow(fabs(b / a), lerp);
 483 }
 484
 485 void CPM_PM_Aircontrol(vector wishdir, float wishspeed)
 486 {
 487         float zspeed, xyspeed, dot, k;
 488
 489 #if 0
 490         // this doesn't play well with analog input
 491         if(self.movement_x == 0 || self.movement.y != 0)
 492                 return; // can't control movement if not moving forward or backward
 493         k = 32;
 494 #else
 495         k = 32 * (2 * IsMoveInDirection(self.movement, 0) - 1);
 496         if(k <= 0)
 497                 return;
 498 #endif
 499
 500         k *= bound(0, wishspeed / autocvar_sv_maxairspeed, 1);
 501
 502         zspeed = self.velocity.z;
 503         self.velocity_z = 0;
 504         xyspeed = vlen(self.velocity); self.velocity = normalize(self.velocity);
 505
 506         dot = self.velocity * wishdir;
 507
 508         if(dot > 0) // we can't change direction while slowing down
 509         {
 510                 k *= pow(dot, autocvar_sv_aircontrol_power)*frametime;
 511                 xyspeed = max(0, xyspeed - autocvar_sv_aircontrol_penalty * sqrt(max(0, 1 - dot*dot)) * k/32);
 512                 k *= autocvar_sv_aircontrol;
 513                 self.velocity = normalize(self.velocity * xyspeed + wishdir * k);
 514         }
 515
 516         self.velocity = self.velocity * xyspeed;
 517         self.velocity_z = zspeed;
 518 }
 519
 520 float AdjustAirAccelQW(float accelqw, float factor)
 521 {
 522         return copysign(bound(0.000001, 1 - (1 - fabs(accelqw)) * factor, 1), accelqw);
 523 }
 524
 525 // example config for alternate speed clamping:
 526 //   sv_airaccel_qw 0.8
 527 //   sv_airaccel_sideways_friction 0
 528 //   prvm_globalset server speedclamp_mode 1
 529 //     (or 2)
 530 void PM_Accelerate(vector wishdir, float wishspeed, float wishspeed0, float accel, float accelqw, float stretchfactor, float sidefric, float speedlimit)
 531 {
 532         float vel_straight;
 533         float velZ;
 534         vector vel_perpend;
 535         float step;
 536
 537         vector vel_xy;
 538         float vel_xy_current;
 539         float vel_xy_backward, vel_xy_forward;
 540         float speedclamp;
 541
 542         if(stretchfactor > 0)
 543                 speedclamp = stretchfactor;
 544         else if(accelqw < 0)
 545                 speedclamp = 1; // full clamping, no stretch
 546         else
 547                 speedclamp = -1; // no clamping
 548
 549         if(accelqw < 0)
 550                 accelqw = -accelqw;
 551
 552         if(autocvar_sv_gameplayfix_q2airaccelerate)
 553                 wishspeed0 = wishspeed;
 554
 555         vel_straight = self.velocity * wishdir;
 556         velZ = self.velocity.z;
 557         vel_xy = vec2(self.velocity);
 558         vel_perpend = vel_xy - vel_straight * wishdir;
 559
 560         step = accel * frametime * wishspeed0;
 561
 562         vel_xy_current  = vlen(vel_xy);
 563         if(speedlimit)
 564                 accelqw = AdjustAirAccelQW(accelqw, (speedlimit - bound(wishspeed, vel_xy_current, speedlimit)) / max(1, speedlimit - wishspeed));
 565         vel_xy_forward  = vel_xy_current + bound(0, wishspeed - vel_xy_current, step) * accelqw + step * (1 - accelqw);
 566         vel_xy_backward = vel_xy_current - bound(0, wishspeed + vel_xy_current, step) * accelqw - step * (1 - accelqw);
 567         if(vel_xy_backward < 0)
 568                 vel_xy_backward = 0; // not that it REALLY occurs that this would cause wrong behaviour afterwards
 569
 570         vel_straight = vel_straight + bound(0, wishspeed - vel_straight, step) * accelqw + step * (1 - accelqw);
 571
 572         if(sidefric < 0 && (vel_perpend*vel_perpend))
 573                 // negative: only apply so much sideways friction to stay below the speed you could get by "braking"
 574         {
 575                 float f, fminimum;
 576                 f = max(0, 1 + frametime * wishspeed * sidefric);
 577                 fminimum = (vel_xy_backward*vel_xy_backward - vel_straight*vel_straight) / (vel_perpend*vel_perpend);
 578                 // this cannot be > 1
 579                 if(fminimum <= 0)
 580                         vel_perpend = vel_perpend * max(0, f);
 581                 else
 582                 {
 583                         fminimum = sqrt(fminimum);
 584                         vel_perpend = vel_perpend * max(fminimum, f);
 585                 }
 586         }
 587         else
 588                 vel_perpend = vel_perpend * max(0, 1 - frametime * wishspeed * sidefric);
 589
 590         vel_xy = vel_straight * wishdir + vel_perpend;
 591
 592         if(speedclamp >= 0)
 593         {
 594                 float vel_xy_preclamp;
 595                 vel_xy_preclamp = vlen(vel_xy);
 596                 if(vel_xy_preclamp > 0) // prevent division by zero
 597                 {
 598                         vel_xy_current += (vel_xy_forward - vel_xy_current) * speedclamp;
 599                         if(vel_xy_current < vel_xy_preclamp)
 600                                 vel_xy = vel_xy * (vel_xy_current / vel_xy_preclamp);
 601                 }
 602         }
 603
 604         self.velocity = vel_xy + velZ * '0 0 1';
 605 }
 606
 607 void PM_AirAccelerate(vector wishdir, float wishspeed)
 608 {
 609         vector curvel, wishvel, acceldir, curdir;
 610         float addspeed, accelspeed, curspeed, f;
 611         float dot;
 612
 613         if(wishspeed == 0)
 614                 return;
 615
 616         curvel = self.velocity;
 617         curvel.z = 0;
 618         curspeed = vlen(curvel);
 619
 620         if(wishspeed > curspeed * 1.01)
 621         {
 622                 wishspeed = min(wishspeed, curspeed + autocvar_sv_warsowbunny_airforwardaccel * self.stat_sv_maxspeed * frametime);
 623         }
 624         else
 625         {
 626                 f = max(0, (autocvar_sv_warsowbunny_topspeed - curspeed) / (autocvar_sv_warsowbunny_topspeed - self.stat_sv_maxspeed));
 627                 wishspeed = max(curspeed, self.stat_sv_maxspeed) + autocvar_sv_warsowbunny_accel * f * self.stat_sv_maxspeed * frametime;
 628         }
 629         wishvel = wishdir * wishspeed;
 630         acceldir = wishvel - curvel;
 631         addspeed = vlen(acceldir);
 632         acceldir = normalize(acceldir);
 633
 634         accelspeed = min(addspeed, autocvar_sv_warsowbunny_turnaccel * self.stat_sv_maxspeed * frametime);
 635
 636         if(autocvar_sv_warsowbunny_backtosideratio < 1)
 637         {
 638                 curdir = normalize(curvel);
 639                 dot = acceldir * curdir;
 640                 if(dot < 0)
 641                         acceldir = acceldir - (1 - autocvar_sv_warsowbunny_backtosideratio) * dot * curdir;
 642         }
 643
 644         self.velocity += accelspeed * acceldir;
 645 }
 646
 647 .vector movement_old;
 648 .float buttons_old;
 649 .vector v_angle_old;
 650 .string lastclassname;
 651
 652 .float() PlayerPhysplug;
 653
 654 string specialcommand = "xwxwxsxsxaxdxaxdx1x ";
 655 .float specialcommand_pos;
 656 void SpecialCommand()
 657 {
 658 #ifdef TETRIS
 659         TetrisImpulse();
 660 #else
 661         if(!CheatImpulse(99))
 662                 print("A hollow voice says \"Plugh\".\n");
 663 #endif
 664 }
 665
 666 string GetMapname(void);
 667 float speedaward_lastupdate;
 668 float speedaward_lastsent;
 669 void SV_PlayerPhysics()
 670 {
 671         vector wishvel, wishdir, v;
 672         float wishspeed, f, maxspd_mod, spd, maxairspd, airaccel, swampspd_mod, buttons;
 673         string temps;
 674         int buttons_prev;
 675         float not_allowed_to_move;
 676         string c;
 677
 678         WarpZone_PlayerPhysics_FixVAngle();
 679
 680         maxspd_mod = 1;
 681         if(self.ballcarried)
 682                 if(g_keepaway)
 683                         maxspd_mod *= autocvar_g_keepaway_ballcarrier_highspeed;
 684
 685         maxspd_mod *= autocvar_g_movement_highspeed;
 686
 687         // fix physics stats for g_movement_highspeed
 688         // TODO maybe rather use maxairspeed? needs testing
 689         self.stat_sv_airaccel_qw = AdjustAirAccelQW(autocvar_sv_airaccel_qw, maxspd_mod);
 690         if(autocvar_sv_airstrafeaccel_qw)
 691                 self.stat_sv_airstrafeaccel_qw = AdjustAirAccelQW(autocvar_sv_airstrafeaccel_qw, maxspd_mod);
 692         else
 693                 self.stat_sv_airstrafeaccel_qw = 0;
 694         self.stat_sv_airspeedlimit_nonqw = autocvar_sv_airspeedlimit_nonqw * maxspd_mod;
 695         self.stat_sv_maxspeed = autocvar_sv_maxspeed * maxspd_mod; // also slow walking
 696
 697     if(self.PlayerPhysplug)
 698         if(self.PlayerPhysplug())
 699             return;
 700
 701         self.race_movetime_frac += frametime;
 702         f = floor(self.race_movetime_frac);
 703         self.race_movetime_frac -= f;
 704         self.race_movetime_count += f;
 705         self.race_movetime = self.race_movetime_frac + self.race_movetime_count;
 706
 707         anticheat_physics();
 708
 709         buttons = self.BUTTON_ATCK + 2 * self.BUTTON_JUMP + 4 * self.BUTTON_ATCK2 + 8 * self.BUTTON_ZOOM + 16 * self.BUTTON_CROUCH + 32 * self.BUTTON_HOOK + 64 * self.BUTTON_USE + 128 * (self.movement.x < 0) + 256 * (self.movement.x > 0) + 512 * (self.movement.y < 0) + 1024 * (self.movement.y > 0);
 710
 711         if(!buttons)
 712                 c = "x";
 713         else if(buttons == 1)
 714                 c = "1";
 715         else if(buttons == 2)
 716                 c = " ";
 717         else if(buttons == 128)
 718                 c = "s";
 719         else if(buttons == 256)
 720                 c = "w";
 721         else if(buttons == 512)
 722                 c = "a";
 723         else if(buttons == 1024)
 724                 c = "d";
 725         else
 726                 c = "?";
 727
 728         if(c == substring(specialcommand, self.specialcommand_pos, 1))
 729         {
 730                 self.specialcommand_pos += 1;
 731                 if(self.specialcommand_pos >= strlen(specialcommand))
 732                 {
 733                         self.specialcommand_pos = 0;
 734                         SpecialCommand();
 735                         return;
 736                 }
 737         }
 738         else if(self.specialcommand_pos && (c != substring(specialcommand, self.specialcommand_pos - 1, 1)))
 739                 self.specialcommand_pos = 0;
 740
 741         if(sv_maxidle > 0)
 742         {
 743                 if(buttons != self.buttons_old || self.movement != self.movement_old || self.v_angle != self.v_angle_old)
 744                         self.parm_idlesince = time;
 745         }
 746         buttons_prev = self.buttons_old;
 747         self.buttons_old = buttons;
 748         self.movement_old = self.movement;
 749         self.v_angle_old = self.v_angle;
 750
 751         if(time < self.nickspamtime)
 752         if(self.nickspamcount >= autocvar_g_nick_flood_penalty_yellow)
 753         {
 754                 // slight annoyance for nick change scripts
 755                 self.movement = -1 * self.movement;
 756                 self.BUTTON_ATCK = self.BUTTON_JUMP = self.BUTTON_ATCK2 = self.BUTTON_ZOOM = self.BUTTON_CROUCH = self.BUTTON_HOOK = self.BUTTON_USE = 0;
 757
 758                 if(self.nickspamcount >= autocvar_g_nick_flood_penalty_red) // if you are persistent and the slight annoyance above does not stop you, I'll show you!
 759                 {
 760                         self.angles_x = random() * 360;
 761                         self.angles_y = random() * 360;
 762                         // at least I'm not forcing retardedview by also assigning to angles_z
 763                         self.fixangle = true;
 764                 }
 765         }
 766
 767         if (self.punchangle != '0 0 0')
 768         {
 769                 f = vlen(self.punchangle) - 10 * frametime;
 770                 if (f > 0)
 771                         self.punchangle = normalize(self.punchangle) * f;
 772                 else
 773                         self.punchangle = '0 0 0';
 774         }
 775
 776         if (self.punchvector != '0 0 0')
 777         {
 778                 f = vlen(self.punchvector) - 30 * frametime;
 779                 if (f > 0)
 780                         self.punchvector = normalize(self.punchvector) * f;
 781                 else
 782                         self.punchvector = '0 0 0';
 783         }
 784
 785         if (IS_BOT_CLIENT(self))
 786         {
 787                 if(playerdemo_read())
 788                         return;
 789                 bot_think();
 790         }
 791
 792         if(IS_PLAYER(self))
 793         {
 794                 if(self.race_penalty)
 795                         if(time > self.race_penalty)
 796                                 self.race_penalty = 0;
 797
 798                 not_allowed_to_move = 0;
 799                 if(self.race_penalty)
 800                         not_allowed_to_move = 1;
 801                 if(time < game_starttime)
 802                         not_allowed_to_move = 1;
 803
 804                 if(not_allowed_to_move)
 805                 {
 806                         self.velocity = '0 0 0';
 807                         self.movetype = MOVETYPE_NONE;
 808                         self.disableclientprediction = 2;
 809                 }
 810                 else if(self.disableclientprediction == 2)
 811                 {
 812                         if(self.movetype == MOVETYPE_NONE)
 813                                 self.movetype = MOVETYPE_WALK;
 814                         self.disableclientprediction = 0;
 815                 }
 816         }
 817
 818         if (self.movetype == MOVETYPE_NONE)
 819                 return;
 820
 821         // when we get here, disableclientprediction cannot be 2
 822         self.disableclientprediction = 0;
 823         if(time < self.ladder_time)
 824                 self.disableclientprediction = 1;
 825
 826         if(time < self.spider_slowness)
 827         {
 828                 self.stat_sv_maxspeed *= 0.5; // half speed while slow from spider
 829                 self.stat_sv_airspeedlimit_nonqw *= 0.5;
 830         }
 831
 832         if(self.frozen)
 833         {
 834                 if(autocvar_sv_dodging_frozen && IS_REAL_CLIENT(self))
 835                 {
 836                         self.movement_x = bound(-5, self.movement.x, 5);
 837                         self.movement_y = bound(-5, self.movement.y, 5);
 838                         self.movement_z = bound(-5, self.movement.z, 5);
 839                 }
 840                 else
 841                         self.movement = '0 0 0';
 842                 self.disableclientprediction = 1;
 843
 844                 vector midpoint = ((self.absmin + self.absmax) * 0.5);
 845                 if(pointcontents(midpoint) == CONTENT_WATER)
 846                 {
 847                         self.velocity = self.velocity * 0.5;
 848
 849                         if(pointcontents(midpoint + '0 0 16') == CONTENT_WATER)
 850                                 { self.velocity_z = 200; }
 851                 }
 852         }
 853
 854         MUTATOR_CALLHOOK(PlayerPhysics);
 855
 856         if(self.player_blocked)
 857         {
 858                 self.movement = '0 0 0';
 859                 self.disableclientprediction = 1;
 860         }
 861
 862         maxspd_mod = 1;
 863
 864         swampspd_mod = 1;
 865         if(self.in_swamp) {
 866                 swampspd_mod = self.swamp_slowdown; //cvar("g_balance_swamp_moverate");
 867         }
 868
 869         // conveyors: first fix velocity
 870         if(self.conveyor.state)
 871                 self.velocity -= self.conveyor.movedir;
 872
 873         if (!IS_PLAYER(self))
 874         {
 875                 maxspd_mod = autocvar_sv_spectator_speed_multiplier;
 876                 if(!self.spectatorspeed)
 877                         self.spectatorspeed = maxspd_mod;
 878                 if(self.impulse && self.impulse <= 19 || (self.impulse >= 200 && self.impulse <= 209) || (self.impulse >= 220 && self.impulse <= 229))
 879                 {
 880                         if(self.lastclassname != "player")
 881                         {
 882                                 if(self.impulse == 10 || self.impulse == 15 || self.impulse == 18 || (self.impulse >= 200 && self.impulse <= 209))
 883                                         self.spectatorspeed = bound(1, self.spectatorspeed + 0.5, 5);
 884                                 else if(self.impulse == 11)
 885                                         self.spectatorspeed = maxspd_mod;
 886                                 else if(self.impulse == 12 || self.impulse == 16  || self.impulse == 19 || (self.impulse >= 220 && self.impulse <= 229))
 887                                         self.spectatorspeed = bound(1, self.spectatorspeed - 0.5, 5);
 888                                 else if(self.impulse >= 1 && self.impulse <= 9)
 889                                         self.spectatorspeed = 1 + 0.5 * (self.impulse - 1);
 890                         } // otherwise just clear
 891                         self.impulse = 0;
 892                 }
 893                 maxspd_mod = self.spectatorspeed;
 894         }
 895
 896         spd = max(self.stat_sv_maxspeed, autocvar_sv_maxairspeed) * maxspd_mod * swampspd_mod;
 897         if(self.speed != spd)
 898         {
 899                 self.speed = spd;
 900                 temps = ftos(spd);
 901                 stuffcmd(self, strcat("cl_forwardspeed ", temps, "\n"));
 902                 stuffcmd(self, strcat("cl_backspeed ", temps, "\n"));
 903                 stuffcmd(self, strcat("cl_sidespeed ", temps, "\n"));
 904                 stuffcmd(self, strcat("cl_upspeed ", temps, "\n"));
 905         }
 906
 907         maxspd_mod *= swampspd_mod; // only one common speed modder please!
 908         swampspd_mod = 1;
 909
 910         // if dead, behave differently
 911         if (self.deadflag)
 912                 goto end;
 913
 914         if (!self.fixangle && !g_bugrigs)
 915         {
 916                 self.angles_x = 0;
 917                 self.angles_y = self.v_angle.y;
 918                 self.angles_z = 0;
 919         }
 920
 921         if(self.flags & FL_ONGROUND)
 922         if(IS_PLAYER(self)) // no fall sounds for observers thank you very much
 923         if(self.wasFlying)
 924         {
 925                 self.wasFlying = 0;
 926
 927                 if(self.waterlevel < WATERLEVEL_SWIMMING)
 928                 if(time >= self.ladder_time)
 929                 if (!self.hook)
 930                 {
 931                         self.nextstep = time + 0.3 + random() * 0.1;
 932                         trace_dphitq3surfaceflags = 0;
 933                         tracebox(self.origin, self.mins, self.maxs, self.origin - '0 0 1', MOVE_NOMONSTERS, self);
 934                         if (!(trace_dphitq3surfaceflags & Q3SURFACEFLAG_NOSTEPS))
 935                         {
 936                                 if(trace_dphitq3surfaceflags & Q3SURFACEFLAG_METALSTEPS)
 937                                         GlobalSound(globalsound_metalfall, CH_PLAYER, VOICETYPE_PLAYERSOUND);
 938                                 else
 939                                         GlobalSound(globalsound_fall, CH_PLAYER, VOICETYPE_PLAYERSOUND);
 940                         }
 941                 }
 942         }
 943
 944         if(IsFlying(self))
 945                 self.wasFlying = 1;
 946
 947         if(IS_PLAYER(self))
 948                 CheckPlayerJump();
 949
 950         if (self.flags & FL_WATERJUMP )
 951         {
 952                 self.velocity_x = self.movedir.x;
 953                 self.velocity_y = self.movedir.y;
 954                 if (time > self.teleport_time || self.waterlevel == WATERLEVEL_NONE)
 955                 {
 956                         self.flags &= ~FL_WATERJUMP;
 957                         self.teleport_time = 0;
 958                 }
 959         }
 960         else if (g_bugrigs && IS_PLAYER(self))
 961         {
 962                 RaceCarPhysics();
 963         }
 964         else if (self.movetype == MOVETYPE_NOCLIP || self.movetype == MOVETYPE_FLY || self.movetype == MOVETYPE_FLY_WORLDONLY)
 965         {
 966                 // noclipping or flying
 967                 self.flags &= ~FL_ONGROUND;
 968
 969                 self.velocity = self.velocity * (1 - frametime * autocvar_sv_friction);
 970                 makevectors(self.v_angle);
 971                 //wishvel = v_forward * self.movement_x + v_right * self.movement_y + v_up * self.movement_z;
 972                 wishvel = v_forward * self.movement.x + v_right * self.movement.y + '0 0 1' * self.movement.z;
 973                 // acceleration
 974                 wishdir = normalize(wishvel);
 975                 wishspeed = vlen(wishvel);
 976                 if (wishspeed > self.stat_sv_maxspeed*maxspd_mod)
 977                         wishspeed = self.stat_sv_maxspeed*maxspd_mod;
 978                 if (time >= self.teleport_time)
 979                         PM_Accelerate(wishdir, wishspeed, wishspeed, autocvar_sv_accelerate*maxspd_mod, 1, 0, 0, 0);
 980         }
 981         else if (self.waterlevel >= WATERLEVEL_SWIMMING)
 982         {
 983                 // swimming
 984                 self.flags &= ~FL_ONGROUND;
 985
 986                 makevectors(self.v_angle);
 987                 //wishvel = v_forward * self.movement_x + v_right * self.movement_y + v_up * self.movement_z;
 988                 wishvel = v_forward * self.movement.x + v_right * self.movement.y + '0 0 1' * self.movement.z;
 989                 if (wishvel == '0 0 0')
 990                         wishvel = '0 0 -60'; // drift towards bottom
 991
 992                 wishdir = normalize(wishvel);
 993                 wishspeed = vlen(wishvel);
 994                 if (wishspeed > self.stat_sv_maxspeed*maxspd_mod)
 995                         wishspeed = self.stat_sv_maxspeed*maxspd_mod;
 996                 wishspeed = wishspeed * 0.7;
 997
 998                 // water friction
 999                 self.velocity = self.velocity * (1 - frametime * autocvar_sv_friction);
1000
1001                 // water acceleration
1002                 PM_Accelerate(wishdir, wishspeed, wishspeed, autocvar_sv_accelerate*maxspd_mod, 1, 0, 0, 0);
1003         }
1004         else if (time < self.ladder_time)
1005         {
1006                 // on a spawnfunc_func_ladder or swimming in spawnfunc_func_water
1007                 self.flags &= ~FL_ONGROUND;
1008
1009                 float g;
1010                 g = autocvar_sv_gravity * frametime;
1011                 if(self.gravity)
1012                         g *= self.gravity;
1013                 if(autocvar_sv_gameplayfix_gravityunaffectedbyticrate)
1014                 {
1015                         g *= 0.5;
1016                         self.velocity_z += g;
1017                 }
1018
1019                 self.velocity = self.velocity * (1 - frametime * autocvar_sv_friction);
1020                 makevectors(self.v_angle);
1021                 //wishvel = v_forward * self.movement_x + v_right * self.movement_y + v_up * self.movement_z;
1022                 wishvel = v_forward * self.movement.x + v_right * self.movement.y + '0 0 1' * self.movement.z;
1023                 self.velocity_z += g;
1024                 if (self.ladder_entity.classname == "func_water")
1025                 {
1026                         f = vlen(wishvel);
1027                         if (f > self.ladder_entity.speed)
1028                                 wishvel = wishvel * (self.ladder_entity.speed / f);
1029
1030                         self.watertype = self.ladder_entity.skin;
1031                         f = self.ladder_entity.origin.z + self.ladder_entity.maxs.z;
1032                         if ((self.origin.z + self.view_ofs.z) < f)
1033                                 self.waterlevel = WATERLEVEL_SUBMERGED;
1034                         else if ((self.origin.z + (self.mins.z + self.maxs.z) * 0.5) < f)
1035                                 self.waterlevel = WATERLEVEL_SWIMMING;
1036                         else if ((self.origin.z + self.mins.z + 1) < f)
1037                                 self.waterlevel = WATERLEVEL_WETFEET;
1038                         else
1039                         {
1040                                 self.waterlevel = WATERLEVEL_NONE;
1041                                 self.watertype = CONTENT_EMPTY;
1042                         }
1043                 }
1044                 // acceleration
1045                 wishdir = normalize(wishvel);
1046                 wishspeed = vlen(wishvel);
1047                 if (wishspeed > self.stat_sv_maxspeed*maxspd_mod)
1048                         wishspeed = self.stat_sv_maxspeed*maxspd_mod;
1049                 if (time >= self.teleport_time)
1050                 {
1051                         // water acceleration
1052                         PM_Accelerate(wishdir, wishspeed, wishspeed, autocvar_sv_accelerate*maxspd_mod, 1, 0, 0, 0);
1053                 }
1054         }
1055         else if (self.items & IT_USING_JETPACK)
1056         {
1057                 //makevectors(self.v_angle_y * '0 1 0');
1058                 makevectors(self.v_angle);
1059                 wishvel = v_forward * self.movement.x + v_right * self.movement.y;
1060                 // add remaining speed as Z component
1061                 maxairspd = autocvar_sv_maxairspeed*max(1, maxspd_mod);
1062                 // fix speedhacks :P
1063                 wishvel = normalize(wishvel) * min(vlen(wishvel) / maxairspd, 1);
1064                 // add the unused velocity as up component
1065                 wishvel.z = 0;
1066
1067                 // if(self.BUTTON_JUMP)
1068                         wishvel.z = sqrt(max(0, 1 - wishvel * wishvel));
1069
1070                 // it is now normalized, so...
1071                 float a_side, a_up, a_add, a_diff;
1072                 a_side = autocvar_g_jetpack_acceleration_side;
1073                 a_up = autocvar_g_jetpack_acceleration_up;
1074                 a_add = autocvar_g_jetpack_antigravity * autocvar_sv_gravity;
1075
1076                 wishvel.x *= a_side;
1077                 wishvel.y *= a_side;
1078                 wishvel.z *= a_up;
1079                 wishvel.z += a_add;
1080
1081                 float best;
1082                 best = 0;
1083                 //////////////////////////////////////////////////////////////////////////////////////
1084                 // finding the maximum over all vectors of above form
1085                 // with wishvel having an absolute value of 1
1086                 //////////////////////////////////////////////////////////////////////////////////////
1087                 // we're finding the maximum over
1088                 //   f(a_side, a_up, a_add, z) := a_side * (1 - z^2) + (a_add + a_up * z)^2;
1089                 // for z in the range from -1 to 1
1090                 //////////////////////////////////////////////////////////////////////////////////////
1091                 // maximum is EITHER attained at the single extreme point:
1092                 a_diff = a_side * a_side - a_up * a_up;
1093                 if(a_diff != 0)
1094                 {
1095                         f = a_add * a_up / a_diff; // this is the zero of diff(f(a_side, a_up, a_add, z), z)
1096                         if(f > -1 && f < 1) // can it be attained?
1097                         {
1098                                 best = (a_diff + a_add * a_add) * (a_diff + a_up * a_up) / a_diff;
1099                                 //print("middle\n");
1100                         }
1101                 }
1102                 // OR attained at z = 1:
1103                 f = (a_up + a_add) * (a_up + a_add);
1104                 if(f > best)
1105                 {
1106                         best = f;
1107                         //print("top\n");
1108                 }
1109                 // OR attained at z = -1:
1110                 f = (a_up - a_add) * (a_up - a_add);
1111                 if(f > best)
1112                 {
1113                         best = f;
1114                         //print("bottom\n");
1115                 }
1116                 best = sqrt(best);
1117                 //////////////////////////////////////////////////////////////////////////////////////
1118
1119                 //print("best possible acceleration: ", ftos(best), "\n");
1120
1121                 float fxy, fz;
1122                 fxy = bound(0, 1 - (self.velocity * normalize(wishvel.x * '1 0 0' + wishvel.y * '0 1 0')) / autocvar_g_jetpack_maxspeed_side, 1);
1123                 if(wishvel.z - autocvar_sv_gravity > 0)
1124                         fz = bound(0, 1 - self.velocity.z / autocvar_g_jetpack_maxspeed_up, 1);
1125                 else
1126                         fz = bound(0, 1 + self.velocity.z / autocvar_g_jetpack_maxspeed_up, 1);
1127
1128                 wishvel.x *= fxy;
1129                 wishvel.y *= fxy;
1130                 wishvel.z = (wishvel.z - autocvar_sv_gravity) * fz + autocvar_sv_gravity;
1131
1132                 float fvel;
1133                 fvel = min(1, vlen(wishvel) / best);
1134                 if(autocvar_g_jetpack_fuel && !(self.items & IT_UNLIMITED_WEAPON_AMMO))
1135                         f = min(1, self.ammo_fuel / (autocvar_g_jetpack_fuel * frametime * fvel));
1136                 else
1137                         f = 1;
1138
1139                 //print("this acceleration: ", ftos(vlen(wishvel) * f), "\n");
1140
1141                 if (f > 0 && wishvel != '0 0 0')
1142                 {
1143                         self.velocity = self.velocity + wishvel * f * frametime;
1144                         if (!(self.items & IT_UNLIMITED_WEAPON_AMMO))
1145                                 self.ammo_fuel -= autocvar_g_jetpack_fuel * frametime * fvel * f;
1146                         self.flags &= ~FL_ONGROUND;
1147                         self.items |= IT_USING_JETPACK;
1148
1149                         // jetpack also inhibits health regeneration, but only for 1 second
1150                         self.pauseregen_finished = max(self.pauseregen_finished, time + autocvar_g_balance_pause_fuel_regen);
1151                 }
1152         }
1153         else if (self.flags & FL_ONGROUND)
1154         {
1155                 // we get here if we ran out of ammo
1156                 if((self.items & IT_JETPACK) && self.BUTTON_HOOK && !(buttons_prev & 32) && self.ammo_fuel < 0.01)
1157                         Send_Notification(NOTIF_ONE, self, MSG_INFO, INFO_JETPACK_NOFUEL);
1158
1159                 // walking
1160                 makevectors(self.v_angle.y * '0 1 0');
1161                 wishvel = v_forward * self.movement.x + v_right * self.movement.y;
1162
1163                 if(!(self.lastflags & FL_ONGROUND))
1164                 {
1165                         if(autocvar_speedmeter)
1166                                 dprint(strcat("landing velocity: ", vtos(self.velocity), " (abs: ", ftos(vlen(self.velocity)), ")\n"));
1167                         if(self.lastground < time - 0.3)
1168                                 self.velocity = self.velocity * (1 - autocvar_sv_friction_on_land);
1169                         if(self.jumppadcount > 1)
1170                                 dprint(strcat(ftos(self.jumppadcount), "x jumppad combo\n"));
1171                         self.jumppadcount = 0;
1172                 }
1173
1174                 v = self.velocity;
1175                 v.z = 0;
1176                 f = vlen(v);
1177                 if(f > 0)
1178                 {
1179                         if (f < autocvar_sv_stopspeed)
1180                                 f = 1 - frametime * (autocvar_sv_stopspeed / f) * autocvar_sv_friction;
1181                         else
1182                                 f = 1 - frametime * autocvar_sv_friction;
1183                         if (f > 0)
1184                                 self.velocity = self.velocity * f;
1185                         else
1186                                 self.velocity = '0 0 0';
1187                         /*
1188                            Mathematical analysis time!
1189
1190                            Our goal is to invert this mess.
1191
1192                            For the two cases we get:
1193                                 v = v0 * (1 - frametime * (autocvar_sv_stopspeed / v0) * autocvar_sv_friction)
1194                                   = v0 - frametime * autocvar_sv_stopspeed * autocvar_sv_friction
1195                                 v0 = v + frametime * autocvar_sv_stopspeed * autocvar_sv_friction
1196                            and
1197                                 v = v0 * (1 - frametime * autocvar_sv_friction)
1198                                 v0 = v / (1 - frametime * autocvar_sv_friction)
1199
1200                            These cases would be chosen ONLY if:
1201                                 v0 < autocvar_sv_stopspeed
1202                                 v + frametime * autocvar_sv_stopspeed * autocvar_sv_friction < autocvar_sv_stopspeed
1203                                 v < autocvar_sv_stopspeed * (1 - frametime * autocvar_sv_friction)
1204                            and, respectively:
1205                                 v0 >= autocvar_sv_stopspeed
1206                                 v / (1 - frametime * autocvar_sv_friction) >= autocvar_sv_stopspeed
1207                                 v >= autocvar_sv_stopspeed * (1 - frametime * autocvar_sv_friction)
1208                          */
1209                 }
1210
1211                 // acceleration
1212                 wishdir = normalize(wishvel);
1213                 wishspeed = vlen(wishvel);
1214                 if (wishspeed > self.stat_sv_maxspeed*maxspd_mod)
1215                         wishspeed = self.stat_sv_maxspeed*maxspd_mod;
1216                 if (self.crouch)
1217                         wishspeed = wishspeed * 0.5;
1218                 if (time >= self.teleport_time)
1219                         PM_Accelerate(wishdir, wishspeed, wishspeed, autocvar_sv_accelerate*maxspd_mod, 1, 0, 0, 0);
1220         }
1221         else
1222         {
1223                 float wishspeed0;
1224                 // we get here if we ran out of ammo
1225                 if((self.items & IT_JETPACK) && self.BUTTON_HOOK && !(buttons_prev & 32) && self.ammo_fuel < 0.01)
1226                         Send_Notification(NOTIF_ONE, self, MSG_INFO, INFO_JETPACK_NOFUEL);
1227
1228                 if(maxspd_mod < 1)
1229                 {
1230                         maxairspd = autocvar_sv_maxairspeed*maxspd_mod;
1231                         airaccel = autocvar_sv_airaccelerate*maxspd_mod;
1232                 }
1233                 else
1234                 {
1235                         maxairspd = autocvar_sv_maxairspeed;
1236                         airaccel = autocvar_sv_airaccelerate;
1237                 }
1238                 // airborn
1239                 makevectors(self.v_angle.y * '0 1 0');
1240                 wishvel = v_forward * self.movement.x + v_right * self.movement.y;
1241                 // acceleration
1242                 wishdir = normalize(wishvel);
1243                 wishspeed = wishspeed0 = vlen(wishvel);
1244                 if (wishspeed0 > self.stat_sv_maxspeed*maxspd_mod)
1245                         wishspeed0 = self.stat_sv_maxspeed*maxspd_mod;
1246                 if (wishspeed > maxairspd)
1247                         wishspeed = maxairspd;
1248                 if (self.crouch)
1249                         wishspeed = wishspeed * 0.5;
1250                 if (time >= self.teleport_time)
1251                 {
1252                         float accelerating;
1253                         float wishspeed2;
1254                         float airaccelqw;
1255                         float strafity;
1256
1257                         airaccelqw = self.stat_sv_airaccel_qw;
1258                         accelerating = (self.velocity * wishdir > 0);
1259                         wishspeed2 = wishspeed;
1260
1261                         // CPM
1262                         if(autocvar_sv_airstopaccelerate)
1263                         {
1264                                 vector curdir;
1265                                 curdir = self.velocity;
1266                                 curdir.z = 0;
1267                                 curdir = normalize(curdir);
1268                                 airaccel = airaccel + (autocvar_sv_airstopaccelerate*maxspd_mod - airaccel) * max(0, -(curdir * wishdir));
1269                         }
1270                         // note that for straight forward jumping:
1271                         // step = accel * frametime * wishspeed0;
1272                         // accel  = bound(0, wishspeed - vel_xy_current, step) * accelqw + step * (1 - accelqw);
1273                         // -->
1274                         // dv/dt = accel * maxspeed (when slow)
1275                         // dv/dt = accel * maxspeed * (1 - accelqw) (when fast)
1276                         // log dv/dt = logaccel + logmaxspeed (when slow)
1277                         // log dv/dt = logaccel + logmaxspeed + log(1 - accelqw) (when fast)
1278                         strafity = IsMoveInDirection(self.movement, -90) + IsMoveInDirection(self.movement, +90); // if one is nonzero, other is always zero
1279                         if(autocvar_sv_maxairstrafespeed)
1280                                 wishspeed = min(wishspeed, GeomLerp(autocvar_sv_maxairspeed*maxspd_mod, strafity, autocvar_sv_maxairstrafespeed*maxspd_mod));
1281                         if(autocvar_sv_airstrafeaccelerate)
1282                                 airaccel = GeomLerp(airaccel, strafity, autocvar_sv_airstrafeaccelerate*maxspd_mod);
1283                         if(self.stat_sv_airstrafeaccel_qw)
1284                                 airaccelqw = copysign(1-GeomLerp(1-fabs(self.stat_sv_airaccel_qw), strafity, 1-fabs(self.stat_sv_airstrafeaccel_qw)), ((strafity > 0.5) ? self.stat_sv_airstrafeaccel_qw : self.stat_sv_airaccel_qw));
1285                         // !CPM
1286
1287                         if(autocvar_sv_warsowbunny_turnaccel && accelerating && self.movement_y == 0 && self.movement.x != 0)
1288                                 PM_AirAccelerate(wishdir, wishspeed);
1289                         else
1290                                 PM_Accelerate(wishdir, wishspeed, wishspeed0, airaccel, airaccelqw, autocvar_sv_airaccel_qw_stretchfactor, autocvar_sv_airaccel_sideways_friction / maxairspd, self.stat_sv_airspeedlimit_nonqw);
1291
1292                         if(autocvar_sv_aircontrol)
1293                                 CPM_PM_Aircontrol(wishdir, wishspeed2);
1294                 }
1295         }
1296
1297         if((g_cts || g_race) && !IS_OBSERVER(self))
1298         {
1299                 if(vlen(self.velocity - self.velocity.z * '0 0 1') > speedaward_speed)
1300                 {
1301                         speedaward_speed = vlen(self.velocity - self.velocity.z * '0 0 1');
1302                         speedaward_holder = self.netname;
1303                         speedaward_uid = self.crypto_idfp;
1304                         speedaward_lastupdate = time;
1305                 }
1306                 if(speedaward_speed > speedaward_lastsent && time - speedaward_lastupdate > 1)
1307                 {
1308                         string rr = (g_cts) ? CTS_RECORD : RACE_RECORD;
1309                         race_send_speedaward(MSG_ALL);
1310                         speedaward_lastsent = speedaward_speed;
1311                         if (speedaward_speed > speedaward_alltimebest && speedaward_uid != "")
1312                         {
1313                                 speedaward_alltimebest = speedaward_speed;
1314                                 speedaward_alltimebest_holder = speedaward_holder;
1315                                 speedaward_alltimebest_uid = speedaward_uid;
1316                                 db_put(ServerProgsDB, strcat(GetMapname(), rr, "speed/speed"), ftos(speedaward_alltimebest));
1317                                 db_put(ServerProgsDB, strcat(GetMapname(), rr, "speed/crypto_idfp"), speedaward_alltimebest_uid);
1318                                 race_send_speedaward_alltimebest(MSG_ALL);
1319                         }
1320                 }
1321         }
1322
1323         // WEAPONTODO
1324         float xyspeed;
1325         xyspeed = vlen('1 0 0' * self.velocity.x + '0 1 0' * self.velocity.y);
1326         if(self.weapon == WEP_VORTEX && WEP_CVAR(vortex, charge) && WEP_CVAR(vortex, charge_velocity_rate) && xyspeed > WEP_CVAR(vortex, charge_minspeed))
1327         {
1328                 // add a maximum of charge_velocity_rate when going fast (f = 1), gradually increasing from minspeed (f = 0) to maxspeed
1329                 xyspeed = min(xyspeed, WEP_CVAR(vortex, charge_maxspeed));
1330                 f = (xyspeed - WEP_CVAR(vortex, charge_minspeed)) / (WEP_CVAR(vortex, charge_maxspeed) - WEP_CVAR(vortex, charge_minspeed));
1331                 // add the extra charge
1332                 self.vortex_charge = min(1, self.vortex_charge + WEP_CVAR(vortex, charge_velocity_rate) * f * frametime);
1333         }
1334 :end
1335         if(self.flags & FL_ONGROUND)
1336                 self.lastground = time;
1337
1338         // conveyors: then break velocity again
1339         if(self.conveyor.state)
1340                 self.velocity += self.conveyor.movedir;
1341
1342         self.lastflags = self.flags;
1343         self.lastclassname = self.classname;
1344 }