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         // old stats
  43         // fix some new settings
  44         STAT(MOVEVARS_AIRACCEL_QW_STRETCHFACTOR, this) = Physics_ClientOption(this, "airaccel_qw_stretchfactor", autocvar_sv_airaccel_qw_stretchfactor);
  45         STAT(MOVEVARS_MAXAIRSTRAFESPEED, this) = Physics_ClientOption(this, "maxairstrafespeed", autocvar_sv_maxairstrafespeed);
  46         STAT(MOVEVARS_MAXAIRSPEED, this) = Physics_ClientOption(this, "maxairspeed", autocvar_sv_maxairspeed);
  47         STAT(MOVEVARS_AIRSTRAFEACCELERATE, this) = Physics_ClientOption(this, "airstrafeaccelerate", autocvar_sv_airstrafeaccelerate);
  48         STAT(MOVEVARS_WARSOWBUNNY_TURNACCEL, this) = Physics_ClientOption(this, "warsowbunny_turnaccel", autocvar_sv_warsowbunny_turnaccel);
  49         STAT(MOVEVARS_AIRACCEL_SIDEWAYS_FRICTION, this) = Physics_ClientOption(this, "airaccel_sideways_friction", autocvar_sv_airaccel_sideways_friction);
  50         STAT(MOVEVARS_AIRCONTROL, this) = Physics_ClientOption(this, "aircontrol", autocvar_sv_aircontrol);
  51         STAT(MOVEVARS_AIRCONTROL_POWER, this) = Physics_ClientOption(this, "aircontrol_power", autocvar_sv_aircontrol_power);
  52         STAT(MOVEVARS_AIRCONTROL_PENALTY, this) = Physics_ClientOption(this, "aircontrol_penalty", autocvar_sv_aircontrol_penalty);
  53         STAT(MOVEVARS_WARSOWBUNNY_AIRFORWARDACCEL, this) = Physics_ClientOption(this, "warsowbunny_airforwardaccel", autocvar_sv_warsowbunny_airforwardaccel);
  54         STAT(MOVEVARS_WARSOWBUNNY_TOPSPEED, this) = Physics_ClientOption(this, "warsowbunny_topspeed", autocvar_sv_warsowbunny_topspeed);
  55         STAT(MOVEVARS_WARSOWBUNNY_ACCEL, this) = Physics_ClientOption(this, "warsowbunny_accel", autocvar_sv_warsowbunny_accel);
  56         STAT(MOVEVARS_WARSOWBUNNY_BACKTOSIDERATIO, this) = Physics_ClientOption(this, "warsowbunny_backtosideratio", autocvar_sv_warsowbunny_backtosideratio);
  57         STAT(MOVEVARS_FRICTION, this) = Physics_ClientOption(this, "friction", autocvar_sv_friction);
  58         STAT(MOVEVARS_ACCELERATE, this) = Physics_ClientOption(this, "accelerate", autocvar_sv_accelerate);
  59         STAT(MOVEVARS_STOPSPEED, this) = Physics_ClientOption(this, "stopspeed", autocvar_sv_stopspeed);
  60         STAT(MOVEVARS_AIRACCELERATE, this) = Physics_ClientOption(this, "airaccelerate", autocvar_sv_airaccelerate);
  61         STAT(MOVEVARS_AIRSTOPACCELERATE, this) = Physics_ClientOption(this, "airstopaccelerate", autocvar_sv_airstopaccelerate);
  62         STAT(MOVEVARS_JUMPVELOCITY, this) = Physics_ClientOption(this, "jumpvelocity", autocvar_sv_jumpvelocity);
  63         STAT(MOVEVARS_TRACK_CANJUMP, this) = Physics_ClientOption(this, "track_canjump", autocvar_sv_track_canjump);
  64 }
  65 #endif
  66
  67 float IsMoveInDirection(vector mv, float ang) // key mix factor
  68 {
  69         if (mv_x == 0 && mv_y == 0)
  70                 return 0; // avoid division by zero
  71         ang -= RAD2DEG * atan2(mv_y, mv_x);
  72         ang = remainder(ang, 360) / 45;
  73         return ang > 1 ? 0 : ang < -1 ? 0 : 1 - fabs(ang);
  74 }
  75
  76 float GeomLerp(float a, float _lerp, float b)
  77 {
  78         return a == 0 ? (_lerp < 1 ? 0 : b)
  79                 : b == 0 ? (_lerp > 0 ? 0 : a)
  80                 : a * pow(fabs(b / a), _lerp);
  81 }
  82
  83 #define unstick_offsets(X) \
  84 /* 1 no nudge (just return the original if this test passes) */ \
  85         X(' 0.000  0.000  0.000') \
  86 /* 6 simple nudges */ \
  87         X(' 0.000  0.000  0.125') X('0.000  0.000 -0.125') \
  88         X('-0.125  0.000  0.000') X('0.125  0.000  0.000') \
  89         X(' 0.000 -0.125  0.000') X('0.000  0.125  0.000') \
  90 /* 4 diagonal flat nudges */ \
  91         X('-0.125 -0.125  0.000') X('0.125 -0.125  0.000') \
  92         X('-0.125  0.125  0.000') X('0.125  0.125  0.000') \
  93 /* 8 diagonal upward nudges */ \
  94         X('-0.125  0.000  0.125') X('0.125  0.000  0.125') \
  95         X(' 0.000 -0.125  0.125') X('0.000  0.125  0.125') \
  96         X('-0.125 -0.125  0.125') X('0.125 -0.125  0.125') \
  97         X('-0.125  0.125  0.125') X('0.125  0.125  0.125') \
  98 /* 8 diagonal downward nudges */ \
  99         X('-0.125  0.000 -0.125') X('0.125  0.000 -0.125') \
 100         X(' 0.000 -0.125 -0.125') X('0.000  0.125 -0.125') \
 101         X('-0.125 -0.125 -0.125') X('0.125 -0.125 -0.125') \
 102         X('-0.125  0.125 -0.125') X('0.125  0.125 -0.125') \
 103 /**/
 104
 105 void PM_ClientMovement_Unstick(entity this)
 106 {
 107         #define X(unstick_offset) \
 108         { \
 109                 vector neworigin = unstick_offset + this.origin; \
 110                 tracebox(neworigin, STAT(PL_CROUCH_MIN, NULL), STAT(PL_CROUCH_MAX, NULL), neworigin, MOVE_NORMAL, this); \
 111                 if (!trace_startsolid) \
 112                 { \
 113                         setorigin(this, neworigin); \
 114                         return; \
 115                 } \
 116         }
 117         unstick_offsets(X);
 118         #undef X
 119 }
 120
 121 void PM_ClientMovement_UpdateStatus(entity this)
 122 {
 123 #ifdef CSQC
 124         if(!IS_PLAYER(this))
 125                 return;
 126
 127         // set crouched
 128         bool do_crouch = PHYS_INPUT_BUTTON_CROUCH(this);
 129         if(this.hook && !wasfreed(this.hook))
 130                 do_crouch = false;
 131         if(this.waterlevel >= WATERLEVEL_SWIMMING)
 132                 do_crouch = false;
 133         if(hud != HUD_NORMAL)
 134                 do_crouch = false;
 135         if(STAT(FROZEN, this))
 136                 do_crouch = false;
 137         if((activeweapon.spawnflags & WEP_TYPE_MELEE_PRI) && viewmodel.animstate_startframe == viewmodel.anim_fire1_x && time < viewmodel.weapon_nextthink)
 138                 do_crouch = false;
 139         if((activeweapon.spawnflags & WEP_TYPE_MELEE_SEC) && viewmodel.animstate_startframe == viewmodel.anim_fire2_x && time < viewmodel.weapon_nextthink)
 140                 do_crouch = false;
 141
 142         if (do_crouch)
 143         {
 144                 // wants to crouch, this always works
 145                 if (!IS_DUCKED(this)) SET_DUCKED(this);
 146         }
 147         else
 148         {
 149                 // wants to stand, if currently crouching we need to check for a low ceiling first
 150                 if (IS_DUCKED(this))
 151                 {
 152                         tracebox(this.origin, STAT(PL_MIN, NULL), STAT(PL_MAX, NULL), this.origin, MOVE_NORMAL, this);
 153                         if (!trace_startsolid) UNSET_DUCKED(this);
 154                 }
 155         }
 156
 157         if (IS_ONGROUND(this) || this.velocity.z <= 0 || PHYS_WATERJUMP_TIME(this) <= 0)
 158                 PHYS_WATERJUMP_TIME(this) = 0;
 159 #endif
 160 }
 161
 162 void CPM_PM_Aircontrol(entity this, float dt, vector wishdir, float wishspeed)
 163 {
 164         float k = 32 * (2 * IsMoveInDirection(this.movement, 0) - 1);
 165         if (k <= 0)
 166                 return;
 167
 168         k *= bound(0, wishspeed / PHYS_MAXAIRSPEED(this), 1);
 169
 170         float zspeed = this.velocity_z;
 171         this.velocity_z = 0;
 172         float xyspeed = vlen(this.velocity);
 173         this.velocity = normalize(this.velocity);
 174
 175         float dot = this.velocity * wishdir;
 176
 177         if (dot > 0) // we can't change direction while slowing down
 178         {
 179                 k *= pow(dot, PHYS_AIRCONTROL_POWER(this)) * dt;
 180                 xyspeed = max(0, xyspeed - PHYS_AIRCONTROL_PENALTY(this) * sqrt(max(0, 1 - dot*dot)) * k/32);
 181                 k *= PHYS_AIRCONTROL(this);
 182                 this.velocity = normalize(this.velocity * xyspeed + wishdir * k);
 183         }
 184
 185         this.velocity = this.velocity * xyspeed;
 186         this.velocity_z = zspeed;
 187 }
 188
 189 float AdjustAirAccelQW(float accelqw, float factor)
 190 {
 191         return copysign(bound(0.000001, 1 - (1 - fabs(accelqw)) * factor, 1), accelqw);
 192 }
 193
 194 // example config for alternate speed clamping:
 195 //   sv_airaccel_qw 0.8
 196 //   sv_airaccel_sideways_friction 0
 197 //   prvm_globalset server speedclamp_mode 1
 198 //     (or 2)
 199 void PM_Accelerate(entity this, float dt, vector wishdir, float wishspeed, float wishspeed0, float accel, float accelqw, float stretchfactor, float sidefric, float speedlimit)
 200 {
 201         float speedclamp = stretchfactor > 0 ? stretchfactor
 202         : accelqw < 0 ? 1 // full clamping, no stretch
 203         : -1; // no clamping
 204
 205         accelqw = fabs(accelqw);
 206
 207         if (GAMEPLAYFIX_Q2AIRACCELERATE)
 208                 wishspeed0 = wishspeed; // don't need to emulate this Q1 bug
 209
 210         float vel_straight = this.velocity * wishdir;
 211         float vel_z = this.velocity_z;
 212         vector vel_xy = vec2(this.velocity);
 213         vector vel_perpend = vel_xy - vel_straight * wishdir;
 214
 215         float step = accel * dt * wishspeed0;
 216
 217         float vel_xy_current  = vlen(vel_xy);
 218         if (speedlimit)
 219                 accelqw = AdjustAirAccelQW(accelqw, (speedlimit - bound(wishspeed, vel_xy_current, speedlimit)) / max(1, speedlimit - wishspeed));
 220         float vel_xy_forward =  vel_xy_current  + bound(0, wishspeed - vel_xy_current, step) * accelqw + step * (1 - accelqw);
 221         float vel_xy_backward = vel_xy_current  - bound(0, wishspeed + vel_xy_current, step) * accelqw - step * (1 - accelqw);
 222         vel_xy_backward = max(0, vel_xy_backward); // not that it REALLY occurs that this would cause wrong behaviour afterwards
 223         vel_straight =          vel_straight    + bound(0, wishspeed - vel_straight,   step) * accelqw + step * (1 - accelqw);
 224
 225         if (sidefric < 0 && (vel_perpend*vel_perpend))
 226                 // negative: only apply so much sideways friction to stay below the speed you could get by "braking"
 227         {
 228                 float f = max(0, 1 + dt * wishspeed * sidefric);
 229                 float themin = (vel_xy_backward * vel_xy_backward - vel_straight * vel_straight) / (vel_perpend * vel_perpend);
 230                 // assume: themin > 1
 231                 // vel_xy_backward*vel_xy_backward - vel_straight*vel_straight > vel_perpend*vel_perpend
 232                 // vel_xy_backward*vel_xy_backward > vel_straight*vel_straight + vel_perpend*vel_perpend
 233                 // vel_xy_backward*vel_xy_backward > vel_xy * vel_xy
 234                 // obviously, this cannot be
 235                 if (themin <= 0)
 236                         vel_perpend *= f;
 237                 else
 238                 {
 239                         themin = sqrt(themin);
 240                         vel_perpend *= max(themin, f);
 241                 }
 242         }
 243         else
 244                 vel_perpend *= max(0, 1 - dt * wishspeed * sidefric);
 245
 246         vel_xy = vel_straight * wishdir + vel_perpend;
 247
 248         if (speedclamp >= 0)
 249         {
 250                 float vel_xy_preclamp;
 251                 vel_xy_preclamp = vlen(vel_xy);
 252                 if (vel_xy_preclamp > 0) // prevent division by zero
 253                 {
 254                         vel_xy_current += (vel_xy_forward - vel_xy_current) * speedclamp;
 255                         if (vel_xy_current < vel_xy_preclamp)
 256                                 vel_xy *= (vel_xy_current / vel_xy_preclamp);
 257                 }
 258         }
 259
 260         this.velocity = vel_xy + vel_z * '0 0 1';
 261 }
 262
 263 void PM_AirAccelerate(entity this, float dt, vector wishdir, float wishspeed)
 264 {
 265         if (wishspeed == 0)
 266                 return;
 267
 268         vector curvel = this.velocity;
 269         curvel_z = 0;
 270         float curspeed = vlen(curvel);
 271
 272         if (wishspeed > curspeed * 1.01)
 273                 wishspeed = min(wishspeed, curspeed + PHYS_WARSOWBUNNY_AIRFORWARDACCEL(this) * PHYS_MAXSPEED(this) * dt);
 274         else
 275         {
 276                 float f = max(0, (PHYS_WARSOWBUNNY_TOPSPEED(this) - curspeed) / (PHYS_WARSOWBUNNY_TOPSPEED(this) - PHYS_MAXSPEED(this)));
 277                 wishspeed = max(curspeed, PHYS_MAXSPEED(this)) + PHYS_WARSOWBUNNY_ACCEL(this) * f * PHYS_MAXSPEED(this) * dt;
 278         }
 279         vector wishvel = wishdir * wishspeed;
 280         vector acceldir = wishvel - curvel;
 281         float addspeed = vlen(acceldir);
 282         acceldir = normalize(acceldir);
 283
 284         float accelspeed = min(addspeed, PHYS_WARSOWBUNNY_TURNACCEL(this) * PHYS_MAXSPEED(this) * dt);
 285
 286         if (PHYS_WARSOWBUNNY_BACKTOSIDERATIO(this) < 1)
 287         {
 288                 vector curdir = normalize(curvel);
 289                 float dot = acceldir * curdir;
 290                 if (dot < 0)
 291                         acceldir -= (1 - PHYS_WARSOWBUNNY_BACKTOSIDERATIO(this)) * dot * curdir;
 292         }
 293
 294         this.velocity += accelspeed * acceldir;
 295 }
 296
 297
 298 /*
 299 =============
 300 PlayerJump
 301
 302 When you press the jump key
 303 returns true if handled
 304 =============
 305 */
 306 bool PlayerJump(entity this)
 307 {
 308         if (PHYS_FROZEN(this))
 309                 return true; // no jumping in freezetag when frozen
 310
 311 #ifdef SVQC
 312         if (this.player_blocked)
 313                 return true; // no jumping while blocked
 314 #endif
 315
 316         bool doublejump = false;
 317         float mjumpheight = PHYS_JUMPVELOCITY(this);
 318
 319         if (MUTATOR_CALLHOOK(PlayerJump, this, mjumpheight, doublejump))
 320                 return true;
 321
 322         mjumpheight = M_ARGV(1, float);
 323         doublejump = M_ARGV(2, bool);
 324
 325         if (this.waterlevel >= WATERLEVEL_SWIMMING)
 326         {
 327                 if(this.viewloc)
 328                 {
 329                         doublejump = true;
 330                         mjumpheight *= 0.7;
 331                 }
 332                 else
 333                 {
 334                         this.velocity_z = PHYS_MAXSPEED(this) * 0.7;
 335                         return true;
 336                 }
 337         }
 338
 339         if (!doublejump)
 340                 if (!IS_ONGROUND(this))
 341                         return IS_JUMP_HELD(this);
 342
 343         bool track_jump = PHYS_CL_TRACK_CANJUMP(this);
 344         if(PHYS_TRACK_CANJUMP(this))
 345                 track_jump = true;
 346
 347         if (track_jump)
 348                 if (IS_JUMP_HELD(this))
 349                         return true;
 350
 351         // sv_jumpspeedcap_min/sv_jumpspeedcap_max act as baseline
 352         // velocity bounds.  Final velocity is bound between (jumpheight *
 353         // min + jumpheight) and (jumpheight * max + jumpheight);
 354
 355         if(PHYS_JUMPSPEEDCAP_MIN != "")
 356         {
 357                 float minjumpspeed = mjumpheight * stof(PHYS_JUMPSPEEDCAP_MIN);
 358
 359                 if (this.velocity_z < minjumpspeed)
 360                         mjumpheight += minjumpspeed - this.velocity_z;
 361         }
 362
 363         if(PHYS_JUMPSPEEDCAP_MAX != "")
 364         {
 365                 // don't do jump speedcaps on ramps to preserve old xonotic ramjump style
 366                 tracebox(this.origin + '0 0 0.01', this.mins, this.maxs, this.origin - '0 0 0.01', MOVE_NORMAL, this);
 367
 368                 if (!(trace_fraction < 1 && trace_plane_normal_z < 0.98 && PHYS_JUMPSPEEDCAP_DISABLE_ONRAMPS(this)))
 369                 {
 370                         float maxjumpspeed = mjumpheight * stof(PHYS_JUMPSPEEDCAP_MAX);
 371
 372                         if (this.velocity_z > maxjumpspeed)
 373                                 mjumpheight -= this.velocity_z - maxjumpspeed;
 374                 }
 375         }
 376
 377         if (!WAS_ONGROUND(this))
 378         {
 379 #ifdef SVQC
 380                 if(autocvar_speedmeter)
 381                         LOG_TRACE(strcat("landing velocity: ", vtos(this.velocity), " (abs: ", ftos(vlen(this.velocity)), ")\n"));
 382 #endif
 383                 if(this.lastground < time - 0.3)
 384                 {
 385                         float f = (1 - PHYS_FRICTION_ONLAND(this));
 386                         this.velocity_x *= f;
 387                         this.velocity_y *= f;
 388                 }
 389 #ifdef SVQC
 390                 if(this.jumppadcount > 1)
 391                         LOG_TRACE(strcat(ftos(this.jumppadcount), "x jumppad combo\n"));
 392                 this.jumppadcount = 0;
 393 #endif
 394         }
 395
 396         this.velocity_z += mjumpheight;
 397
 398         UNSET_ONGROUND(this);
 399         SET_JUMP_HELD(this);
 400
 401 #ifdef SVQC
 402
 403         this.oldvelocity_z = this.velocity_z;
 404
 405         animdecide_setaction(this, ANIMACTION_JUMP, true);
 406
 407         if (autocvar_g_jump_grunt)
 408                 PlayerSound(this, playersound_jump, CH_PLAYER, VOL_BASE, VOICETYPE_PLAYERSOUND);
 409 #endif
 410         return true;
 411 }
 412
 413 void CheckWaterJump(entity this)
 414 {
 415 // check for a jump-out-of-water
 416         makevectors(this.v_angle);
 417         vector start = this.origin;
 418         start_z += 8;
 419         v_forward_z = 0;
 420         normalize(v_forward);
 421         vector end = start + v_forward*24;
 422         traceline (start, end, true, this);
 423         if (trace_fraction < 1)
 424         {       // solid at waist
 425                 start_z = start_z + this.maxs_z - 8;
 426                 end = start + v_forward*24;
 427                 this.movedir = trace_plane_normal * -50;
 428                 traceline(start, end, true, this);
 429                 if (trace_fraction == 1)
 430                 {       // open at eye level
 431                         this.velocity_z = 225;
 432                         this.flags |= FL_WATERJUMP;
 433                         SET_JUMP_HELD(this);
 434                 #ifdef SVQC
 435                         PHYS_TELEPORT_TIME(this) = time + 2;    // safety net
 436                 #elif defined(CSQC)
 437                         PHYS_WATERJUMP_TIME(this) = 2;
 438                 #endif
 439                 }
 440         }
 441 }
 442
 443
 444 #ifdef SVQC
 445         #define JETPACK_JUMP(s) s.cvar_cl_jetpack_jump
 446 #elif defined(CSQC)
 447         float autocvar_cl_jetpack_jump;
 448         #define JETPACK_JUMP(s) autocvar_cl_jetpack_jump
 449 #endif
 450 .float jetpack_stopped;
 451 void CheckPlayerJump(entity this)
 452 {
 453 #ifdef SVQC
 454         bool was_flying = boolean(ITEMS_STAT(this) & IT_USING_JETPACK);
 455 #endif
 456         if (JETPACK_JUMP(this) < 2)
 457                 ITEMS_STAT(this) &= ~IT_USING_JETPACK;
 458
 459         if(PHYS_INPUT_BUTTON_JUMP(this) || PHYS_INPUT_BUTTON_JETPACK(this))
 460         {
 461                 bool playerjump = PlayerJump(this); // required
 462
 463                 bool air_jump = !playerjump || M_ARGV(2, bool);
 464                 bool activate = JETPACK_JUMP(this) && air_jump && PHYS_INPUT_BUTTON_JUMP(this) || PHYS_INPUT_BUTTON_JETPACK(this);
 465                 bool has_fuel = !PHYS_JETPACK_FUEL(this) || PHYS_AMMO_FUEL(this) || (ITEMS_STAT(this) & IT_UNLIMITED_WEAPON_AMMO);
 466
 467                 if (!(ITEMS_STAT(this) & ITEM_Jetpack.m_itemid)) { }
 468                 else if (this.jetpack_stopped) { }
 469                 else if (!has_fuel)
 470                 {
 471 #ifdef SVQC
 472                         if (was_flying) // TODO: ran out of fuel message
 473                                 Send_Notification(NOTIF_ONE, this, MSG_INFO, INFO_JETPACK_NOFUEL);
 474                         else if (activate)
 475                                 Send_Notification(NOTIF_ONE, this, MSG_INFO, INFO_JETPACK_NOFUEL);
 476 #endif
 477                         this.jetpack_stopped = true;
 478                         ITEMS_STAT(this) &= ~IT_USING_JETPACK;
 479                 }
 480                 else if (activate && !PHYS_FROZEN(this))
 481                         ITEMS_STAT(this) |= IT_USING_JETPACK;
 482         }
 483         else
 484         {
 485                 this.jetpack_stopped = false;
 486                 ITEMS_STAT(this) &= ~IT_USING_JETPACK;
 487         }
 488         if (!PHYS_INPUT_BUTTON_JUMP(this))
 489                 UNSET_JUMP_HELD(this);
 490
 491         if (this.waterlevel == WATERLEVEL_SWIMMING)
 492                 CheckWaterJump(this);
 493 }
 494
 495 float racecar_angle(float forward, float down)
 496 {
 497         if (forward < 0)
 498         {
 499                 forward = -forward;
 500                 down = -down;
 501         }
 502
 503         float ret = vectoyaw('0 1 0' * down + '1 0 0' * forward);
 504
 505         float angle_mult = forward / (800 + forward);
 506
 507         if (ret > 180)
 508                 return ret * angle_mult + 360 * (1 - angle_mult);
 509         else
 510                 return ret * angle_mult;
 511 }
 512
 513 string specialcommand = "xwxwxsxsxaxdxaxdx1x ";
 514 .float specialcommand_pos;
 515 void SpecialCommand(entity this)
 516 {
 517 #ifdef SVQC
 518         if (!CheatImpulse(this, CHIMPULSE_GIVE_ALL.impulse))
 519                 LOG_INFO("A hollow voice says \"Plugh\".\n");
 520 #endif
 521 }
 522
 523 bool PM_check_specialcommand(entity this, int buttons)
 524 {
 525 #ifdef SVQC
 526         string c;
 527         if (!buttons)
 528                 c = "x";
 529         else if (buttons == 1)
 530                 c = "1";
 531         else if (buttons == 2)
 532                 c = " ";
 533         else if (buttons == 128)
 534                 c = "s";
 535         else if (buttons == 256)
 536                 c = "w";
 537         else if (buttons == 512)
 538                 c = "a";
 539         else if (buttons == 1024)
 540                 c = "d";
 541         else
 542                 c = "?";
 543
 544         if (c == substring(specialcommand, this.specialcommand_pos, 1))
 545         {
 546                 this.specialcommand_pos += 1;
 547                 if (this.specialcommand_pos >= strlen(specialcommand))
 548                 {
 549                         this.specialcommand_pos = 0;
 550                         SpecialCommand(this);
 551                         return true;
 552                 }
 553         }
 554         else if (this.specialcommand_pos && (c != substring(specialcommand, this.specialcommand_pos - 1, 1)))
 555                 this.specialcommand_pos = 0;
 556 #endif
 557         return false;
 558 }
 559
 560 void PM_check_nickspam(entity this)
 561 {
 562 #ifdef SVQC
 563         if (time >= this.nickspamtime)
 564                 return;
 565         if (this.nickspamcount >= autocvar_g_nick_flood_penalty_yellow)
 566         {
 567                 // slight annoyance for nick change scripts
 568                 this.movement = -1 * this.movement;
 569                 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;
 570
 571                 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!
 572                 {
 573                         this.v_angle_x = random() * 360;
 574                         this.v_angle_y = random() * 360;
 575                         // at least I'm not forcing retardedview by also assigning to angles_z
 576                         this.fixangle = true;
 577                 }
 578         }
 579 #endif
 580 }
 581
 582 void PM_check_punch(entity this, float dt)
 583 {
 584 #ifdef SVQC
 585         if (this.punchangle != '0 0 0')
 586         {
 587                 float f = vlen(this.punchangle) - 10 * dt;
 588                 if (f > 0)
 589                         this.punchangle = normalize(this.punchangle) * f;
 590                 else
 591                         this.punchangle = '0 0 0';
 592         }
 593
 594         if (this.punchvector != '0 0 0')
 595         {
 596                 float f = vlen(this.punchvector) - 30 * dt;
 597                 if (f > 0)
 598                         this.punchvector = normalize(this.punchvector) * f;
 599                 else
 600                         this.punchvector = '0 0 0';
 601         }
 602 #endif
 603 }
 604
 605 // predict frozen movement, as frozen players CAN move in some cases
 606 void PM_check_frozen(entity this)
 607 {
 608         if (!PHYS_FROZEN(this))
 609                 return;
 610         if (PHYS_DODGING_FROZEN(this)
 611 #ifdef SVQC
 612         && IS_REAL_CLIENT(this)
 613 #endif
 614         )
 615         {
 616                 this.movement_x = bound(-5, this.movement.x, 5);
 617                 this.movement_y = bound(-5, this.movement.y, 5);
 618                 this.movement_z = bound(-5, this.movement.z, 5);
 619         }
 620         else
 621                 this.movement = '0 0 0';
 622
 623         vector midpoint = ((this.absmin + this.absmax) * 0.5);
 624         if (pointcontents(midpoint) == CONTENT_WATER)
 625         {
 626                 this.velocity = this.velocity * 0.5;
 627
 628                 if (pointcontents(midpoint + '0 0 16') == CONTENT_WATER)
 629                         this.velocity_z = 200;
 630         }
 631 }
 632
 633 void PM_check_hitground(entity this)
 634 {
 635 #ifdef SVQC
 636         if (!this.wasFlying) return;
 637     this.wasFlying = false;
 638     if (this.waterlevel >= WATERLEVEL_SWIMMING) return;
 639     if (time < this.ladder_time) return;
 640     if (this.hook) return;
 641     this.nextstep = time + 0.3 + random() * 0.1;
 642     trace_dphitq3surfaceflags = 0;
 643     tracebox(this.origin, this.mins, this.maxs, this.origin - '0 0 1', MOVE_NOMONSTERS, this);
 644     if (trace_dphitq3surfaceflags & Q3SURFACEFLAG_NOSTEPS) return;
 645     entity gs = (trace_dphitq3surfaceflags & Q3SURFACEFLAG_METALSTEPS)
 646         ? GS_FALL_METAL
 647         : GS_FALL;
 648     float vol = ((IS_DUCKED(this)) ? VOL_MUFFLED : VOL_BASE);
 649     GlobalSound(this, gs, CH_PLAYER, vol, VOICETYPE_PLAYERSOUND);
 650 #endif
 651 }
 652
 653 void PM_Footsteps(entity this)
 654 {
 655 #ifdef SVQC
 656         if (!g_footsteps) return;
 657         if (IS_DUCKED(this)) return;
 658         if (time >= this.lastground + 0.2) return;
 659         if (vdist(this.velocity, <=, autocvar_sv_maxspeed * 0.6)) return;
 660         if ((time > this.nextstep) || (time < (this.nextstep - 10.0)))
 661         {
 662                 this.nextstep = time + 0.3 + random() * 0.1;
 663                 trace_dphitq3surfaceflags = 0;
 664                 tracebox(this.origin, this.mins, this.maxs, this.origin - '0 0 1', MOVE_NOMONSTERS, this);
 665                 if (trace_dphitq3surfaceflags & Q3SURFACEFLAG_NOSTEPS) return;
 666                 entity gs = (trace_dphitq3surfaceflags & Q3SURFACEFLAG_METALSTEPS)
 667                         ? GS_STEP_METAL
 668                         : GS_STEP;
 669                 GlobalSound(this, gs, CH_PLAYER, VOL_BASE, VOICETYPE_PLAYERSOUND);
 670         }
 671 #endif
 672 }
 673
 674 void PM_check_blocked(entity this)
 675 {
 676 #ifdef SVQC
 677         if (!this.player_blocked)
 678                 return;
 679         this.movement = '0 0 0';
 680         this.disableclientprediction = 1;
 681 #endif
 682 }
 683
 684 .vector oldmovement;
 685
 686 void PM_jetpack(entity this, float maxspd_mod, float dt)
 687 {
 688         //makevectors(this.v_angle.y * '0 1 0');
 689         makevectors(this.v_angle);
 690         vector wishvel = v_forward * this.movement_x
 691                                         + v_right * this.movement_y;
 692         // add remaining speed as Z component
 693         float maxairspd = PHYS_MAXAIRSPEED(this) * max(1, maxspd_mod);
 694         // fix speedhacks :P
 695         wishvel = normalize(wishvel) * min(1, vlen(wishvel) / maxairspd);
 696         // add the unused velocity as up component
 697         wishvel_z = 0;
 698
 699         // if (PHYS_INPUT_BUTTON_JUMP(this))
 700                 wishvel_z = sqrt(max(0, 1 - wishvel * wishvel));
 701
 702         // it is now normalized, so...
 703         float a_side = PHYS_JETPACK_ACCEL_SIDE(this);
 704         float a_up = PHYS_JETPACK_ACCEL_UP(this);
 705         float a_add = PHYS_JETPACK_ANTIGRAVITY(this) * PHYS_GRAVITY(this);
 706
 707         if(PHYS_JETPACK_REVERSE_THRUST(this) && PHYS_INPUT_BUTTON_CROUCH(self)) { a_up = PHYS_JETPACK_REVERSE_THRUST(this); }
 708
 709         wishvel_x *= a_side;
 710         wishvel_y *= a_side;
 711         wishvel_z *= a_up;
 712         wishvel_z += a_add;
 713
 714         if(PHYS_JETPACK_REVERSE_THRUST(this) && PHYS_INPUT_BUTTON_CROUCH(self)) { wishvel_z *= -1; }
 715
 716         float best = 0;
 717         //////////////////////////////////////////////////////////////////////////////////////
 718         // finding the maximum over all vectors of above form
 719         // with wishvel having an absolute value of 1
 720         //////////////////////////////////////////////////////////////////////////////////////
 721         // we're finding the maximum over
 722         //   f(a_side, a_up, a_add, z) := a_side * (1 - z^2) + (a_add + a_up * z)^2;
 723         // for z in the range from -1 to 1
 724         //////////////////////////////////////////////////////////////////////////////////////
 725         // maximum is EITHER attained at the single extreme point:
 726         float a_diff = a_side * a_side - a_up * a_up;
 727         float f;
 728         if (a_diff != 0)
 729         {
 730                 f = a_add * a_up / a_diff; // this is the zero of diff(f(a_side, a_up, a_add, z), z)
 731                 if (f > -1 && f < 1) // can it be attained?
 732                 {
 733                         best = (a_diff + a_add * a_add) * (a_diff + a_up * a_up) / a_diff;
 734                         //print("middle\n");
 735                 }
 736         }
 737         // OR attained at z = 1:
 738         f = (a_up + a_add) * (a_up + a_add);
 739         if (f > best)
 740         {
 741                 best = f;
 742                 //print("top\n");
 743         }
 744         // OR attained at z = -1:
 745         f = (a_up - a_add) * (a_up - a_add);
 746         if (f > best)
 747         {
 748                 best = f;
 749                 //print("bottom\n");
 750         }
 751         best = sqrt(best);
 752         //////////////////////////////////////////////////////////////////////////////////////
 753
 754         //print("best possible acceleration: ", ftos(best), "\n");
 755
 756         float fxy, fz;
 757         fxy = bound(0, 1 - (this.velocity * normalize(wishvel_x * '1 0 0' + wishvel_y * '0 1 0')) / PHYS_JETPACK_MAXSPEED_SIDE(this), 1);
 758         if (wishvel_z - PHYS_GRAVITY(this) > 0)
 759                 fz = bound(0, 1 - this.velocity_z / PHYS_JETPACK_MAXSPEED_UP(this), 1);
 760         else
 761                 fz = bound(0, 1 + this.velocity_z / PHYS_JETPACK_MAXSPEED_UP(this), 1);
 762
 763         float fvel;
 764         fvel = vlen(wishvel);
 765         wishvel_x *= fxy;
 766         wishvel_y *= fxy;
 767         wishvel_z = (wishvel_z - PHYS_GRAVITY(this)) * fz + PHYS_GRAVITY(this);
 768
 769         fvel = min(1, vlen(wishvel) / best);
 770         if (PHYS_JETPACK_FUEL(this) && !(ITEMS_STAT(this) & IT_UNLIMITED_WEAPON_AMMO))
 771                 f = min(1, PHYS_AMMO_FUEL(this) / (PHYS_JETPACK_FUEL(this) * dt * fvel));
 772         else
 773                 f = 1;
 774
 775         //print("this acceleration: ", ftos(vlen(wishvel) * f), "\n");
 776
 777         if (f > 0 && wishvel != '0 0 0')
 778         {
 779                 this.velocity = this.velocity + wishvel * f * dt;
 780                 UNSET_ONGROUND(this);
 781
 782 #ifdef SVQC
 783                 if (!(ITEMS_STAT(this) & IT_UNLIMITED_WEAPON_AMMO))
 784                         this.ammo_fuel -= PHYS_JETPACK_FUEL(this) * dt * fvel * f;
 785
 786                 ITEMS_STAT(this) |= IT_USING_JETPACK;
 787
 788                 // jetpack also inhibits health regeneration, but only for 1 second
 789                 this.pauseregen_finished = max(this.pauseregen_finished, time + autocvar_g_balance_pause_fuel_regen);
 790 #endif
 791         }
 792 }
 793
 794 // used for calculating airshots
 795 bool IsFlying(entity this)
 796 {
 797         if(IS_ONGROUND(this))
 798                 return false;
 799         if(this.waterlevel >= WATERLEVEL_SWIMMING)
 800                 return false;
 801         traceline(this.origin, this.origin - '0 0 48', MOVE_NORMAL, this);
 802         if(trace_fraction < 1)
 803                 return false;
 804         return true;
 805 }
 806
 807
 808 void sys_phys_update(entity this, float dt);
 809 #if defined(SVQC)
 810 void SV_PlayerPhysics(entity this)
 811 #elif defined(CSQC)
 812 void CSQC_ClientMovement_PlayerMove_Frame(entity this)
 813 #endif
 814 {
 815         sys_phys_update(this, PHYS_INPUT_TIMELENGTH);
 816
 817 #ifdef SVQC
 818         this.pm_frametime = frametime;
 819 #endif
 820 }