qcsrc/common/physics/player.qc

   1 #include "player.qh"
   2 #include "../triggers/include.qh"
   3 #include "../viewloc.qh"
   4
   5 #ifdef SVQC
   6
   7 #include <server/miscfunctions.qh>
   8 #include "../triggers/trigger/viewloc.qh"
   9
  10 // client side physics
  11 bool Physics_Valid(string thecvar)
  12 {
  13         return autocvar_g_physics_clientselect && strhasword(autocvar_g_physics_clientselect_options, thecvar);
  14 }
  15
  16 float Physics_ClientOption(entity this, string option, float defaultval)
  17 {
  18         if(Physics_Valid(this.cvar_cl_physics))
  19         {
  20                 string s = sprintf("g_physics_%s_%s", this.cvar_cl_physics, option);
  21                 if(cvar_type(s) & CVAR_TYPEFLAG_EXISTS)
  22                         return cvar(s);
  23         }
  24         if(autocvar_g_physics_clientselect && autocvar_g_physics_clientselect_default)
  25         {
  26                 string s = sprintf("g_physics_%s_%s", autocvar_g_physics_clientselect_default, option);
  27                 if(cvar_type(s) & CVAR_TYPEFLAG_EXISTS)
  28                         return cvar(s);
  29         }
  30         return defaultval;
  31 }
  32
  33 void Physics_UpdateStats(entity this, float maxspd_mod)
  34 {
  35         STAT(MOVEVARS_AIRACCEL_QW, this) = AdjustAirAccelQW(Physics_ClientOption(this, "airaccel_qw", autocvar_sv_airaccel_qw), maxspd_mod);
  36         STAT(MOVEVARS_AIRSTRAFEACCEL_QW, this) = (Physics_ClientOption(this, "airstrafeaccel_qw", autocvar_sv_airstrafeaccel_qw))
  37                 ? AdjustAirAccelQW(Physics_ClientOption(this, "airstrafeaccel_qw", autocvar_sv_airstrafeaccel_qw), maxspd_mod)
  38                 : 0;
  39         STAT(MOVEVARS_AIRSPEEDLIMIT_NONQW, this) = Physics_ClientOption(this, "airspeedlimit_nonqw", autocvar_sv_airspeedlimit_nonqw) * maxspd_mod;
  40         STAT(MOVEVARS_MAXSPEED, this) = Physics_ClientOption(this, "maxspeed", autocvar_sv_maxspeed) * maxspd_mod; // also slow walking
  41
  42         STAT(PL_MIN, this) = autocvar_sv_player_mins;
  43         STAT(PL_MAX, this) = autocvar_sv_player_maxs;
  44         STAT(PL_VIEW_OFS, this) = autocvar_sv_player_viewoffset;
  45         STAT(PL_CROUCH_MIN, this) = autocvar_sv_player_crouch_mins;
  46         STAT(PL_CROUCH_MAX, this) = autocvar_sv_player_crouch_maxs;
  47         STAT(PL_CROUCH_VIEW_OFS, this) = autocvar_sv_player_crouch_viewoffset;
  48
  49         // old stats
  50         // fix some new settings
  51         STAT(MOVEVARS_AIRACCEL_QW_STRETCHFACTOR, this) = Physics_ClientOption(this, "airaccel_qw_stretchfactor", autocvar_sv_airaccel_qw_stretchfactor);
  52         STAT(MOVEVARS_MAXAIRSTRAFESPEED, this) = Physics_ClientOption(this, "maxairstrafespeed", autocvar_sv_maxairstrafespeed);
  53         STAT(MOVEVARS_MAXAIRSPEED, this) = Physics_ClientOption(this, "maxairspeed", autocvar_sv_maxairspeed);
  54         STAT(MOVEVARS_AIRSTRAFEACCELERATE, this) = Physics_ClientOption(this, "airstrafeaccelerate", autocvar_sv_airstrafeaccelerate);
  55         STAT(MOVEVARS_WARSOWBUNNY_TURNACCEL, this) = Physics_ClientOption(this, "warsowbunny_turnaccel", autocvar_sv_warsowbunny_turnaccel);
  56         STAT(MOVEVARS_AIRACCEL_SIDEWAYS_FRICTION, this) = Physics_ClientOption(this, "airaccel_sideways_friction", autocvar_sv_airaccel_sideways_friction);
  57         STAT(MOVEVARS_AIRCONTROL, this) = Physics_ClientOption(this, "aircontrol", autocvar_sv_aircontrol);
  58         STAT(MOVEVARS_AIRCONTROL_POWER, this) = Physics_ClientOption(this, "aircontrol_power", autocvar_sv_aircontrol_power);
  59         STAT(MOVEVARS_AIRCONTROL_BACKWARDS, this) = Physics_ClientOption(this, "aircontrol_backwards", autocvar_sv_aircontrol_backwards);
  60         STAT(MOVEVARS_AIRCONTROL_PENALTY, this) = Physics_ClientOption(this, "aircontrol_penalty", autocvar_sv_aircontrol_penalty);
  61         STAT(MOVEVARS_WARSOWBUNNY_AIRFORWARDACCEL, this) = Physics_ClientOption(this, "warsowbunny_airforwardaccel", autocvar_sv_warsowbunny_airforwardaccel);
  62         STAT(MOVEVARS_WARSOWBUNNY_TOPSPEED, this) = Physics_ClientOption(this, "warsowbunny_topspeed", autocvar_sv_warsowbunny_topspeed);
  63         STAT(MOVEVARS_WARSOWBUNNY_ACCEL, this) = Physics_ClientOption(this, "warsowbunny_accel", autocvar_sv_warsowbunny_accel);
  64         STAT(MOVEVARS_WARSOWBUNNY_BACKTOSIDERATIO, this) = Physics_ClientOption(this, "warsowbunny_backtosideratio", autocvar_sv_warsowbunny_backtosideratio);
  65         STAT(MOVEVARS_FRICTION, this) = Physics_ClientOption(this, "friction", autocvar_sv_friction);
  66         STAT(MOVEVARS_ACCELERATE, this) = Physics_ClientOption(this, "accelerate", autocvar_sv_accelerate);
  67         STAT(MOVEVARS_STOPSPEED, this) = Physics_ClientOption(this, "stopspeed", autocvar_sv_stopspeed);
  68         STAT(MOVEVARS_AIRACCELERATE, this) = Physics_ClientOption(this, "airaccelerate", autocvar_sv_airaccelerate);
  69         STAT(MOVEVARS_AIRSTOPACCELERATE, this) = Physics_ClientOption(this, "airstopaccelerate", autocvar_sv_airstopaccelerate);
  70         STAT(MOVEVARS_JUMPVELOCITY, this) = Physics_ClientOption(this, "jumpvelocity", autocvar_sv_jumpvelocity);
  71         STAT(MOVEVARS_TRACK_CANJUMP, this) = Physics_ClientOption(this, "track_canjump", autocvar_sv_track_canjump);
  72 }
  73 #endif
  74
  75 float IsMoveInDirection(vector mv, float ang) // key mix factor
  76 {
  77         if (mv_x == 0 && mv_y == 0)
  78                 return 0; // avoid division by zero
  79         ang -= RAD2DEG * atan2(mv_y, mv_x);
  80         ang = remainder(ang, 360) / 45;
  81         return ang > 1 ? 0 : ang < -1 ? 0 : 1 - fabs(ang);
  82 }
  83
  84 float GeomLerp(float a, float _lerp, float b)
  85 {
  86         return a == 0 ? (_lerp < 1 ? 0 : b)
  87                 : b == 0 ? (_lerp > 0 ? 0 : a)
  88                 : a * pow(fabs(b / a), _lerp);
  89 }
  90
  91 void PM_ClientMovement_UpdateStatus(entity this)
  92 {
  93 #ifdef CSQC
  94         if(!IS_PLAYER(this))
  95                 return;
  96
  97         // set crouched
  98         bool do_crouch = PHYS_INPUT_BUTTON_CROUCH(this);
  99         if(this.hook && !wasfreed(this.hook))
 100                 do_crouch = false;
 101         if(this.waterlevel >= WATERLEVEL_SWIMMING)
 102                 do_crouch = false;
 103         if(hud != HUD_NORMAL)
 104                 do_crouch = false;
 105         if(STAT(FROZEN, this))
 106                 do_crouch = false;
 107
 108         if (do_crouch)
 109         {
 110                 // wants to crouch, this always works
 111                 if (!IS_DUCKED(this)) SET_DUCKED(this);
 112         }
 113         else
 114         {
 115                 // wants to stand, if currently crouching we need to check for a low ceiling first
 116                 if (IS_DUCKED(this))
 117                 {
 118                         tracebox(this.origin, STAT(PL_MIN, NULL), STAT(PL_MAX, NULL), this.origin, MOVE_NORMAL, this);
 119                         if (!trace_startsolid) UNSET_DUCKED(this);
 120                 }
 121         }
 122
 123         if (IS_ONGROUND(this) || this.velocity.z <= 0 || PHYS_WATERJUMP_TIME(this) <= 0)
 124                 PHYS_WATERJUMP_TIME(this) = 0;
 125 #endif
 126 }
 127
 128 void CPM_PM_Aircontrol(entity this, float dt, vector wishdir, float wishspeed)
 129 {
 130         float movity = IsMoveInDirection(this.movement, 0);
 131         if(PHYS_AIRCONTROL_BACKWARDS(this))
 132                 movity += IsMoveInDirection(this.movement, 180);
 133
 134         float k = 32 * (2 * movity - 1);
 135         if (k <= 0)
 136                 return;
 137
 138         k *= bound(0, wishspeed / PHYS_MAXAIRSPEED(this), 1);
 139
 140         float zspeed = this.velocity_z;
 141         this.velocity_z = 0;
 142         float xyspeed = vlen(this.velocity);
 143         this.velocity = normalize(this.velocity);
 144
 145         float dot = this.velocity * wishdir;
 146
 147         if (dot > 0) // we can't change direction while slowing down
 148         {
 149                 k *= pow(dot, PHYS_AIRCONTROL_POWER(this)) * dt;
 150                 xyspeed = max(0, xyspeed - PHYS_AIRCONTROL_PENALTY(this) * sqrt(max(0, 1 - dot*dot)) * k/32);
 151                 k *= PHYS_AIRCONTROL(this);
 152                 this.velocity = normalize(this.velocity * xyspeed + wishdir * k);
 153         }
 154
 155         this.velocity = this.velocity * xyspeed;
 156         this.velocity_z = zspeed;
 157 }
 158
 159 float AdjustAirAccelQW(float accelqw, float factor)
 160 {
 161         return copysign(bound(0.000001, 1 - (1 - fabs(accelqw)) * factor, 1), accelqw);
 162 }
 163
 164 // example config for alternate speed clamping:
 165 //   sv_airaccel_qw 0.8
 166 //   sv_airaccel_sideways_friction 0
 167 //   prvm_globalset server speedclamp_mode 1
 168 //     (or 2)
 169 void PM_Accelerate(entity this, float dt, vector wishdir, float wishspeed, float wishspeed0, float accel, float accelqw, float stretchfactor, float sidefric, float speedlimit)
 170 {
 171         float speedclamp = stretchfactor > 0 ? stretchfactor
 172         : accelqw < 0 ? 1 // full clamping, no stretch
 173         : -1; // no clamping
 174
 175         accelqw = fabs(accelqw);
 176
 177         if (GAMEPLAYFIX_Q2AIRACCELERATE)
 178                 wishspeed0 = wishspeed; // don't need to emulate this Q1 bug
 179
 180         float vel_straight = this.velocity * wishdir;
 181         float vel_z = this.velocity_z;
 182         vector vel_xy = vec2(this.velocity);
 183         vector vel_perpend = vel_xy - vel_straight * wishdir;
 184
 185         float step = accel * dt * wishspeed0;
 186
 187         float vel_xy_current  = vlen(vel_xy);
 188         if (speedlimit)
 189                 accelqw = AdjustAirAccelQW(accelqw, (speedlimit - bound(wishspeed, vel_xy_current, speedlimit)) / max(1, speedlimit - wishspeed));
 190         float vel_xy_forward =  vel_xy_current  + bound(0, wishspeed - vel_xy_current, step) * accelqw + step * (1 - accelqw);
 191         float vel_xy_backward = vel_xy_current  - bound(0, wishspeed + vel_xy_current, step) * accelqw - step * (1 - accelqw);
 192         vel_xy_backward = max(0, vel_xy_backward); // not that it REALLY occurs that this would cause wrong behaviour afterwards
 193         vel_straight =          vel_straight    + bound(0, wishspeed - vel_straight,   step) * accelqw + step * (1 - accelqw);
 194
 195         if (sidefric < 0 && (vel_perpend*vel_perpend))
 196                 // negative: only apply so much sideways friction to stay below the speed you could get by "braking"
 197         {
 198                 float f = max(0, 1 + dt * wishspeed * sidefric);
 199                 float themin = (vel_xy_backward * vel_xy_backward - vel_straight * vel_straight) / (vel_perpend * vel_perpend);
 200                 // assume: themin > 1
 201                 // vel_xy_backward*vel_xy_backward - vel_straight*vel_straight > vel_perpend*vel_perpend
 202                 // vel_xy_backward*vel_xy_backward > vel_straight*vel_straight + vel_perpend*vel_perpend
 203                 // vel_xy_backward*vel_xy_backward > vel_xy * vel_xy
 204                 // obviously, this cannot be
 205                 if (themin <= 0)
 206                         vel_perpend *= f;
 207                 else
 208                 {
 209                         themin = sqrt(themin);
 210                         vel_perpend *= max(themin, f);
 211                 }
 212         }
 213         else
 214                 vel_perpend *= max(0, 1 - dt * wishspeed * sidefric);
 215
 216         vel_xy = vel_straight * wishdir + vel_perpend;
 217
 218         if (speedclamp >= 0)
 219         {
 220                 float vel_xy_preclamp;
 221                 vel_xy_preclamp = vlen(vel_xy);
 222                 if (vel_xy_preclamp > 0) // prevent division by zero
 223                 {
 224                         vel_xy_current += (vel_xy_forward - vel_xy_current) * speedclamp;
 225                         if (vel_xy_current < vel_xy_preclamp)
 226                                 vel_xy *= (vel_xy_current / vel_xy_preclamp);
 227                 }
 228         }
 229
 230         this.velocity = vel_xy + vel_z * '0 0 1';
 231 }
 232
 233 void PM_AirAccelerate(entity this, float dt, vector wishdir, float wishspeed)
 234 {
 235         if (wishspeed == 0)
 236                 return;
 237
 238         vector curvel = this.velocity;
 239         curvel_z = 0;
 240         float curspeed = vlen(curvel);
 241
 242         if (wishspeed > curspeed * 1.01)
 243                 wishspeed = min(wishspeed, curspeed + PHYS_WARSOWBUNNY_AIRFORWARDACCEL(this) * PHYS_MAXSPEED(this) * dt);
 244         else
 245         {
 246                 float f = max(0, (PHYS_WARSOWBUNNY_TOPSPEED(this) - curspeed) / (PHYS_WARSOWBUNNY_TOPSPEED(this) - PHYS_MAXSPEED(this)));
 247                 wishspeed = max(curspeed, PHYS_MAXSPEED(this)) + PHYS_WARSOWBUNNY_ACCEL(this) * f * PHYS_MAXSPEED(this) * dt;
 248         }
 249         vector wishvel = wishdir * wishspeed;
 250         vector acceldir = wishvel - curvel;
 251         float addspeed = vlen(acceldir);
 252         acceldir = normalize(acceldir);
 253
 254         float accelspeed = min(addspeed, PHYS_WARSOWBUNNY_TURNACCEL(this) * PHYS_MAXSPEED(this) * dt);
 255
 256         if (PHYS_WARSOWBUNNY_BACKTOSIDERATIO(this) < 1)
 257         {
 258                 vector curdir = normalize(curvel);
 259                 float dot = acceldir * curdir;
 260                 if (dot < 0)
 261                         acceldir -= (1 - PHYS_WARSOWBUNNY_BACKTOSIDERATIO(this)) * dot * curdir;
 262         }
 263
 264         this.velocity += accelspeed * acceldir;
 265 }
 266
 267
 268 /*
 269 =============
 270 PlayerJump
 271
 272 When you press the jump key
 273 returns true if handled
 274 =============
 275 */
 276 bool PlayerJump(entity this)
 277 {
 278         if (PHYS_FROZEN(this))
 279                 return true; // no jumping in freezetag when frozen
 280
 281 #ifdef SVQC
 282         if (this.player_blocked)
 283                 return true; // no jumping while blocked
 284 #endif
 285
 286         bool doublejump = false;
 287         float mjumpheight = PHYS_JUMPVELOCITY(this);
 288
 289         if (MUTATOR_CALLHOOK(PlayerJump, this, mjumpheight, doublejump))
 290                 return true;
 291
 292         mjumpheight = M_ARGV(1, float);
 293         doublejump = M_ARGV(2, bool);
 294
 295         if (this.waterlevel >= WATERLEVEL_SWIMMING)
 296         {
 297                 if(this.viewloc)
 298                 {
 299                         doublejump = true;
 300                         mjumpheight *= 0.7;
 301                 }
 302                 else
 303                 {
 304                         this.velocity_z = PHYS_MAXSPEED(this) * 0.7;
 305                         return true;
 306                 }
 307         }
 308
 309         if (!doublejump)
 310                 if (!IS_ONGROUND(this) && !IS_ONSLICK(this))
 311                         return IS_JUMP_HELD(this);
 312
 313         bool track_jump = PHYS_CL_TRACK_CANJUMP(this);
 314         if(PHYS_TRACK_CANJUMP(this))
 315                 track_jump = true;
 316
 317         if (track_jump)
 318                 if (IS_JUMP_HELD(this))
 319                         return true;
 320
 321         // sv_jumpspeedcap_min/sv_jumpspeedcap_max act as baseline
 322         // velocity bounds.  Final velocity is bound between (jumpheight *
 323         // min + jumpheight) and (jumpheight * max + jumpheight);
 324
 325         if(PHYS_JUMPSPEEDCAP_MIN != "")
 326         {
 327                 float minjumpspeed = mjumpheight * stof(PHYS_JUMPSPEEDCAP_MIN);
 328
 329                 if (this.velocity_z < minjumpspeed)
 330                         mjumpheight += minjumpspeed - this.velocity_z;
 331         }
 332
 333         if(PHYS_JUMPSPEEDCAP_MAX != "")
 334         {
 335                 // don't do jump speedcaps on ramps to preserve old xonotic ramjump style
 336                 tracebox(this.origin + '0 0 0.01', this.mins, this.maxs, this.origin - '0 0 0.01', MOVE_NORMAL, this);
 337
 338                 if (!(trace_fraction < 1 && trace_plane_normal_z < 0.98 && PHYS_JUMPSPEEDCAP_DISABLE_ONRAMPS(this)))
 339                 {
 340                         float maxjumpspeed = mjumpheight * stof(PHYS_JUMPSPEEDCAP_MAX);
 341
 342                         if (this.velocity_z > maxjumpspeed)
 343                                 mjumpheight -= this.velocity_z - maxjumpspeed;
 344                 }
 345         }
 346
 347         if (!WAS_ONGROUND(this) && !WAS_ONSLICK(this))
 348         {
 349 #ifdef SVQC
 350                 if(autocvar_speedmeter)
 351                         LOG_TRACE("landing velocity: ", vtos(this.velocity), " (abs: ", ftos(vlen(this.velocity)), ")");
 352 #endif
 353                 if(this.lastground < time - 0.3)
 354                 {
 355                         float f = (1 - PHYS_FRICTION_ONLAND(this));
 356                         this.velocity_x *= f;
 357                         this.velocity_y *= f;
 358                 }
 359 #ifdef SVQC
 360                 if(this.jumppadcount > 1)
 361                         LOG_TRACE(ftos(this.jumppadcount), "x jumppad combo");
 362                 this.jumppadcount = 0;
 363 #endif
 364         }
 365
 366         this.velocity_z += mjumpheight;
 367
 368         UNSET_ONGROUND(this);
 369         UNSET_ONSLICK(this);
 370         SET_JUMP_HELD(this);
 371
 372 #ifdef SVQC
 373
 374         this.oldvelocity_z = this.velocity_z;
 375
 376         animdecide_setaction(this, ANIMACTION_JUMP, true);
 377
 378         if (autocvar_g_jump_grunt)
 379                 PlayerSound(this, playersound_jump, CH_PLAYER, VOL_BASE, VOICETYPE_PLAYERSOUND);
 380 #endif
 381         return true;
 382 }
 383
 384 void CheckWaterJump(entity this)
 385 {
 386 // check for a jump-out-of-water
 387         makevectors(this.v_angle);
 388         vector start = this.origin;
 389         start_z += 8;
 390         v_forward_z = 0;
 391         normalize(v_forward);
 392         vector end = start + v_forward*24;
 393         traceline (start, end, true, this);
 394         if (trace_fraction < 1)
 395         {       // solid at waist
 396                 start_z = start_z + this.maxs_z - 8;
 397                 end = start + v_forward*24;
 398                 this.movedir = trace_plane_normal * -50;
 399                 traceline(start, end, true, this);
 400                 if (trace_fraction == 1)
 401                 {       // open at eye level
 402                         this.velocity_z = 225;
 403                         this.flags |= FL_WATERJUMP;
 404                         SET_JUMP_HELD(this);
 405                 #ifdef SVQC
 406                         PHYS_TELEPORT_TIME(this) = time + 2;    // safety net
 407                 #elif defined(CSQC)
 408                         PHYS_WATERJUMP_TIME(this) = 2;
 409                 #endif
 410                 }
 411         }
 412 }
 413
 414
 415 #ifdef SVQC
 416         #define JETPACK_JUMP(s) s.cvar_cl_jetpack_jump
 417 #elif defined(CSQC)
 418         float autocvar_cl_jetpack_jump;
 419         #define JETPACK_JUMP(s) autocvar_cl_jetpack_jump
 420 #endif
 421 .float jetpack_stopped;
 422 void CheckPlayerJump(entity this)
 423 {
 424 #ifdef SVQC
 425         bool was_flying = boolean(ITEMS_STAT(this) & IT_USING_JETPACK);
 426 #endif
 427         if (JETPACK_JUMP(this) < 2)
 428                 ITEMS_STAT(this) &= ~IT_USING_JETPACK;
 429
 430         if(PHYS_INPUT_BUTTON_JUMP(this) || PHYS_INPUT_BUTTON_JETPACK(this))
 431         {
 432                 bool playerjump = PlayerJump(this); // required
 433
 434                 bool air_jump = !playerjump || M_ARGV(2, bool);
 435                 bool activate = JETPACK_JUMP(this) && air_jump && PHYS_INPUT_BUTTON_JUMP(this) || PHYS_INPUT_BUTTON_JETPACK(this);
 436                 bool has_fuel = !PHYS_JETPACK_FUEL(this) || PHYS_AMMO_FUEL(this) || (ITEMS_STAT(this) & IT_UNLIMITED_WEAPON_AMMO);
 437
 438                 if (!(ITEMS_STAT(this) & ITEM_Jetpack.m_itemid)) { }
 439                 else if (this.jetpack_stopped) { }
 440                 else if (!has_fuel)
 441                 {
 442 #ifdef SVQC
 443                         if (was_flying) // TODO: ran out of fuel message
 444                                 Send_Notification(NOTIF_ONE, this, MSG_INFO, INFO_JETPACK_NOFUEL);
 445                         else if (activate)
 446                                 Send_Notification(NOTIF_ONE, this, MSG_INFO, INFO_JETPACK_NOFUEL);
 447 #endif
 448                         this.jetpack_stopped = true;
 449                         ITEMS_STAT(this) &= ~IT_USING_JETPACK;
 450                 }
 451                 else if (activate && !PHYS_FROZEN(this))
 452                         ITEMS_STAT(this) |= IT_USING_JETPACK;
 453         }
 454         else
 455         {
 456                 this.jetpack_stopped = false;
 457                 ITEMS_STAT(this) &= ~IT_USING_JETPACK;
 458         }
 459         if (!PHYS_INPUT_BUTTON_JUMP(this))
 460                 UNSET_JUMP_HELD(this);
 461
 462         if (this.waterlevel == WATERLEVEL_SWIMMING)
 463                 CheckWaterJump(this);
 464 }
 465
 466 float racecar_angle(float forward, float down)
 467 {
 468         if (forward < 0)
 469         {
 470                 forward = -forward;
 471                 down = -down;
 472         }
 473
 474         float ret = vectoyaw('0 1 0' * down + '1 0 0' * forward);
 475
 476         float angle_mult = forward / (800 + forward);
 477
 478         if (ret > 180)
 479                 return ret * angle_mult + 360 * (1 - angle_mult);
 480         else
 481                 return ret * angle_mult;
 482 }
 483
 484 #ifdef SVQC
 485 string specialcommand = "xwxwxsxsxaxdxaxdx1x ";
 486 .float specialcommand_pos;
 487 void SpecialCommand(entity this)
 488 {
 489         if (!CheatImpulse(this, CHIMPULSE_GIVE_ALL.impulse))
 490                 LOG_INFO("A hollow voice says \"Plugh\".\n");
 491 }
 492 #endif
 493
 494 bool PM_check_specialcommand(entity this, int buttons)
 495 {
 496 #ifdef SVQC
 497         string c;
 498         if (!buttons)
 499                 c = "x";
 500         else if (buttons == 1)
 501                 c = "1";
 502         else if (buttons == 2)
 503                 c = " ";
 504         else if (buttons == 128)
 505                 c = "s";
 506         else if (buttons == 256)
 507                 c = "w";
 508         else if (buttons == 512)
 509                 c = "a";
 510         else if (buttons == 1024)
 511                 c = "d";
 512         else
 513                 c = "?";
 514
 515         if (c == substring(specialcommand, this.specialcommand_pos, 1))
 516         {
 517                 this.specialcommand_pos += 1;
 518                 if (this.specialcommand_pos >= strlen(specialcommand))
 519                 {
 520                         this.specialcommand_pos = 0;
 521                         SpecialCommand(this);
 522                         return true;
 523                 }
 524         }
 525         else if (this.specialcommand_pos && (c != substring(specialcommand, this.specialcommand_pos - 1, 1)))
 526                 this.specialcommand_pos = 0;
 527 #endif
 528         return false;
 529 }
 530
 531 void PM_check_nickspam(entity this)
 532 {
 533 #ifdef SVQC
 534         if (time >= this.nickspamtime)
 535                 return;
 536         if (this.nickspamcount >= autocvar_g_nick_flood_penalty_yellow)
 537         {
 538                 // slight annoyance for nick change scripts
 539                 this.movement = -1 * this.movement;
 540                 PHYS_INPUT_BUTTON_ATCK(this) = PHYS_INPUT_BUTTON_JUMP(this) = PHYS_INPUT_BUTTON_ATCK2(this) = PHYS_INPUT_BUTTON_ZOOM(this) = PHYS_INPUT_BUTTON_CROUCH(this) = PHYS_INPUT_BUTTON_HOOK(this) = PHYS_INPUT_BUTTON_USE(this) = false;
 541
 542                 if (this.nickspamcount >= autocvar_g_nick_flood_penalty_red) // if you are persistent and the slight annoyance above does not stop you, I'll show you!
 543                 {
 544                         this.v_angle_x = random() * 360;
 545                         this.v_angle_y = random() * 360;
 546                         // at least I'm not forcing retardedview by also assigning to angles_z
 547                         this.fixangle = true;
 548                 }
 549         }
 550 #endif
 551 }
 552
 553 void PM_check_punch(entity this, float dt)
 554 {
 555 #ifdef SVQC
 556         if (this.punchangle != '0 0 0')
 557         {
 558                 float f = vlen(this.punchangle) - 10 * dt;
 559                 if (f > 0)
 560                         this.punchangle = normalize(this.punchangle) * f;
 561                 else
 562                         this.punchangle = '0 0 0';
 563         }
 564
 565         if (this.punchvector != '0 0 0')
 566         {
 567                 float f = vlen(this.punchvector) - 30 * dt;
 568                 if (f > 0)
 569                         this.punchvector = normalize(this.punchvector) * f;
 570                 else
 571                         this.punchvector = '0 0 0';
 572         }
 573 #endif
 574 }
 575
 576 // predict frozen movement, as frozen players CAN move in some cases
 577 void PM_check_frozen(entity this)
 578 {
 579         if (!PHYS_FROZEN(this))
 580                 return;
 581         if (PHYS_DODGING_FROZEN(this)
 582 #ifdef SVQC
 583         && IS_REAL_CLIENT(this)
 584 #endif
 585         )
 586         {
 587                 this.movement_x = bound(-5, this.movement.x, 5);
 588                 this.movement_y = bound(-5, this.movement.y, 5);
 589                 this.movement_z = bound(-5, this.movement.z, 5);
 590         }
 591         else
 592                 this.movement = '0 0 0';
 593
 594         vector midpoint = ((this.absmin + this.absmax) * 0.5);
 595         if (pointcontents(midpoint) == CONTENT_WATER)
 596         {
 597                 this.velocity = this.velocity * 0.5;
 598
 599                 if (pointcontents(midpoint + '0 0 16') == CONTENT_WATER)
 600                         this.velocity_z = 200;
 601         }
 602 }
 603
 604 void PM_check_hitground(entity this)
 605 {
 606 #ifdef SVQC
 607         if (!this.wasFlying) return;
 608     this.wasFlying = false;
 609     if (this.waterlevel >= WATERLEVEL_SWIMMING) return;
 610     if (time < this.ladder_time) return;
 611     if (this.hook) return;
 612     this.nextstep = time + 0.3 + random() * 0.1;
 613     trace_dphitq3surfaceflags = 0;
 614     tracebox(this.origin, this.mins, this.maxs, this.origin - '0 0 1', MOVE_NOMONSTERS, this);
 615     if (trace_dphitq3surfaceflags & Q3SURFACEFLAG_NOSTEPS) return;
 616     entity gs = (trace_dphitq3surfaceflags & Q3SURFACEFLAG_METALSTEPS)
 617         ? GS_FALL_METAL
 618         : GS_FALL;
 619     float vol = ((IS_DUCKED(this)) ? VOL_MUFFLED : VOL_BASE);
 620     GlobalSound(this, gs, CH_PLAYER, vol, VOICETYPE_PLAYERSOUND);
 621 #endif
 622 }
 623
 624 void PM_Footsteps(entity this)
 625 {
 626 #ifdef SVQC
 627         if (!g_footsteps) return;
 628         if (IS_DUCKED(this)) return;
 629         if (time >= this.lastground + 0.2) return;
 630         if (vdist(this.velocity, <=, autocvar_sv_maxspeed * 0.6)) return;
 631         if ((time > this.nextstep) || (time < (this.nextstep - 10.0)))
 632         {
 633                 this.nextstep = time + 0.3 + random() * 0.1;
 634                 trace_dphitq3surfaceflags = 0;
 635                 tracebox(this.origin, this.mins, this.maxs, this.origin - '0 0 1', MOVE_NOMONSTERS, this);
 636                 if (trace_dphitq3surfaceflags & Q3SURFACEFLAG_NOSTEPS) return;
 637                 entity gs = (trace_dphitq3surfaceflags & Q3SURFACEFLAG_METALSTEPS)
 638                         ? GS_STEP_METAL
 639                         : GS_STEP;
 640                 GlobalSound(this, gs, CH_PLAYER, VOL_BASE, VOICETYPE_PLAYERSOUND);
 641         }
 642 #endif
 643 }
 644
 645 void PM_check_slick(entity this)
 646 {
 647         if(!IS_ONGROUND(this))
 648                 return;
 649
 650         if(!PHYS_SLICK_APPLYGRAVITY(this))
 651                 return;
 652
 653         tracebox(this.origin, this.mins, this.maxs, this.origin - '0 0 1', MOVE_NOMONSTERS, this);
 654         if (trace_dphitq3surfaceflags & Q3SURFACEFLAG_SLICK)
 655         {
 656                 UNSET_ONGROUND(this);
 657                 SET_ONSLICK(this);
 658         }
 659         else
 660                 UNSET_ONSLICK(this);
 661 }
 662
 663 void PM_check_blocked(entity this)
 664 {
 665 #ifdef SVQC
 666         if (!this.player_blocked)
 667                 return;
 668         this.movement = '0 0 0';
 669         this.disableclientprediction = 1;
 670 #endif
 671 }
 672
 673 void PM_jetpack(entity this, float maxspd_mod, float dt)
 674 {
 675         //makevectors(this.v_angle.y * '0 1 0');
 676         makevectors(this.v_angle);
 677         vector wishvel = v_forward * this.movement_x
 678                                         + v_right * this.movement_y;
 679         // add remaining speed as Z component
 680         float maxairspd = PHYS_MAXAIRSPEED(this) * max(1, maxspd_mod);
 681         // fix speedhacks :P
 682         wishvel = normalize(wishvel) * min(1, vlen(wishvel) / maxairspd);
 683         // add the unused velocity as up component
 684         wishvel_z = 0;
 685
 686         // if (PHYS_INPUT_BUTTON_JUMP(this))
 687                 wishvel_z = sqrt(max(0, 1 - wishvel * wishvel));
 688
 689         // it is now normalized, so...
 690         float a_side = PHYS_JETPACK_ACCEL_SIDE(this);
 691         float a_up = PHYS_JETPACK_ACCEL_UP(this);
 692         float a_add = PHYS_JETPACK_ANTIGRAVITY(this) * PHYS_GRAVITY(this);
 693
 694         if(PHYS_JETPACK_REVERSE_THRUST(this) && PHYS_INPUT_BUTTON_CROUCH(self)) { a_up = PHYS_JETPACK_REVERSE_THRUST(this); }
 695
 696         wishvel_x *= a_side;
 697         wishvel_y *= a_side;
 698         wishvel_z *= a_up;
 699         wishvel_z += a_add;
 700
 701         if(PHYS_JETPACK_REVERSE_THRUST(this) && PHYS_INPUT_BUTTON_CROUCH(self)) { wishvel_z *= -1; }
 702
 703         float best = 0;
 704         //////////////////////////////////////////////////////////////////////////////////////
 705         // finding the maximum over all vectors of above form
 706         // with wishvel having an absolute value of 1
 707         //////////////////////////////////////////////////////////////////////////////////////
 708         // we're finding the maximum over
 709         //   f(a_side, a_up, a_add, z) := a_side * (1 - z^2) + (a_add + a_up * z)^2;
 710         // for z in the range from -1 to 1
 711         //////////////////////////////////////////////////////////////////////////////////////
 712         // maximum is EITHER attained at the single extreme point:
 713         float a_diff = a_side * a_side - a_up * a_up;
 714         float f;
 715         if (a_diff != 0)
 716         {
 717                 f = a_add * a_up / a_diff; // this is the zero of diff(f(a_side, a_up, a_add, z), z)
 718                 if (f > -1 && f < 1) // can it be attained?
 719                 {
 720                         best = (a_diff + a_add * a_add) * (a_diff + a_up * a_up) / a_diff;
 721                         //print("middle\n");
 722                 }
 723         }
 724         // OR attained at z = 1:
 725         f = (a_up + a_add) * (a_up + a_add);
 726         if (f > best)
 727         {
 728                 best = f;
 729                 //print("top\n");
 730         }
 731         // OR attained at z = -1:
 732         f = (a_up - a_add) * (a_up - a_add);
 733         if (f > best)
 734         {
 735                 best = f;
 736                 //print("bottom\n");
 737         }
 738         best = sqrt(best);
 739         //////////////////////////////////////////////////////////////////////////////////////
 740
 741         //print("best possible acceleration: ", ftos(best), "\n");
 742
 743         float fxy, fz;
 744         fxy = bound(0, 1 - (this.velocity * normalize(wishvel_x * '1 0 0' + wishvel_y * '0 1 0')) / PHYS_JETPACK_MAXSPEED_SIDE(this), 1);
 745         if (wishvel_z - PHYS_GRAVITY(this) > 0)
 746                 fz = bound(0, 1 - this.velocity_z / PHYS_JETPACK_MAXSPEED_UP(this), 1);
 747         else
 748                 fz = bound(0, 1 + this.velocity_z / PHYS_JETPACK_MAXSPEED_UP(this), 1);
 749
 750         float fvel;
 751         fvel = vlen(wishvel);
 752         wishvel_x *= fxy;
 753         wishvel_y *= fxy;
 754         wishvel_z = (wishvel_z - PHYS_GRAVITY(this)) * fz + PHYS_GRAVITY(this);
 755
 756         fvel = min(1, vlen(wishvel) / best);
 757         if (PHYS_JETPACK_FUEL(this) && !(ITEMS_STAT(this) & IT_UNLIMITED_WEAPON_AMMO))
 758                 f = min(1, PHYS_AMMO_FUEL(this) / (PHYS_JETPACK_FUEL(this) * dt * fvel));
 759         else
 760                 f = 1;
 761
 762         //print("this acceleration: ", ftos(vlen(wishvel) * f), "\n");
 763
 764         if (f > 0 && wishvel != '0 0 0')
 765         {
 766                 this.velocity = this.velocity + wishvel * f * dt;
 767                 UNSET_ONGROUND(this);
 768
 769 #ifdef SVQC
 770                 if (!(ITEMS_STAT(this) & IT_UNLIMITED_WEAPON_AMMO))
 771                         this.ammo_fuel -= PHYS_JETPACK_FUEL(this) * dt * fvel * f;
 772
 773                 ITEMS_STAT(this) |= IT_USING_JETPACK;
 774
 775                 // jetpack also inhibits health regeneration, but only for 1 second
 776                 this.pauseregen_finished = max(this.pauseregen_finished, time + autocvar_g_balance_pause_fuel_regen);
 777 #endif
 778         }
 779 }
 780
 781 // used for calculating airshots
 782 bool IsFlying(entity this)
 783 {
 784         if(IS_ONGROUND(this))
 785                 return false;
 786         if(this.waterlevel >= WATERLEVEL_SWIMMING)
 787                 return false;
 788         traceline(this.origin, this.origin - '0 0 48', MOVE_NORMAL, this);
 789         if(trace_fraction < 1)
 790                 return false;
 791         return true;
 792 }
 793
 794
 795 void sys_phys_update(entity this, float dt);
 796 #if defined(SVQC)
 797 void SV_PlayerPhysics(entity this)
 798 #elif defined(CSQC)
 799 void CSQC_ClientMovement_PlayerMove_Frame(entity this)
 800 #endif
 801 {
 802         sys_phys_update(this, PHYS_INPUT_TIMELENGTH);
 803
 804 #ifdef SVQC
 805         this.pm_frametime = frametime;
 806 #elif defined(CSQC)
 807         if((ITEMS_STAT(this) & IT_USING_JETPACK) && !IS_DEAD(this) && !intermission)
 808                 this.csqcmodel_modelflags |= MF_ROCKET;
 809         else
 810                 this.csqcmodel_modelflags &= ~MF_ROCKET;
 811 #endif
 812 }