2 #include "../triggers/include.qh"
3 #include "../viewloc.qh"
7 #include <server/miscfunctions.qh>
8 #include "../triggers/trigger/viewloc.qh"
10 // client side physics
11 bool Physics_Valid(string thecvar)
13 return autocvar_g_physics_clientselect && strhasword(autocvar_g_physics_clientselect_options, thecvar);
16 float Physics_ClientOption(entity this, string option, float defaultval)
18 if(Physics_Valid(this.cvar_cl_physics))
20 string s = sprintf("g_physics_%s_%s", this.cvar_cl_physics, option);
21 if(cvar_type(s) & CVAR_TYPEFLAG_EXISTS)
24 if(autocvar_g_physics_clientselect && autocvar_g_physics_clientselect_default)
26 string s = sprintf("g_physics_%s_%s", autocvar_g_physics_clientselect_default, option);
27 if(cvar_type(s) & CVAR_TYPEFLAG_EXISTS)
33 void Physics_UpdateStats(entity this, float maxspd_mod)
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)
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
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_BACKWARDS, this) = Physics_ClientOption(this, "aircontrol_backwards", autocvar_sv_aircontrol_backwards);
53 STAT(MOVEVARS_AIRCONTROL_PENALTY, this) = Physics_ClientOption(this, "aircontrol_penalty", autocvar_sv_aircontrol_penalty);
54 STAT(MOVEVARS_WARSOWBUNNY_AIRFORWARDACCEL, this) = Physics_ClientOption(this, "warsowbunny_airforwardaccel", autocvar_sv_warsowbunny_airforwardaccel);
55 STAT(MOVEVARS_WARSOWBUNNY_TOPSPEED, this) = Physics_ClientOption(this, "warsowbunny_topspeed", autocvar_sv_warsowbunny_topspeed);
56 STAT(MOVEVARS_WARSOWBUNNY_ACCEL, this) = Physics_ClientOption(this, "warsowbunny_accel", autocvar_sv_warsowbunny_accel);
57 STAT(MOVEVARS_WARSOWBUNNY_BACKTOSIDERATIO, this) = Physics_ClientOption(this, "warsowbunny_backtosideratio", autocvar_sv_warsowbunny_backtosideratio);
58 STAT(MOVEVARS_FRICTION, this) = Physics_ClientOption(this, "friction", autocvar_sv_friction);
59 STAT(MOVEVARS_ACCELERATE, this) = Physics_ClientOption(this, "accelerate", autocvar_sv_accelerate);
60 STAT(MOVEVARS_STOPSPEED, this) = Physics_ClientOption(this, "stopspeed", autocvar_sv_stopspeed);
61 STAT(MOVEVARS_AIRACCELERATE, this) = Physics_ClientOption(this, "airaccelerate", autocvar_sv_airaccelerate);
62 STAT(MOVEVARS_AIRSTOPACCELERATE, this) = Physics_ClientOption(this, "airstopaccelerate", autocvar_sv_airstopaccelerate);
63 STAT(MOVEVARS_JUMPVELOCITY, this) = Physics_ClientOption(this, "jumpvelocity", autocvar_sv_jumpvelocity);
64 STAT(MOVEVARS_TRACK_CANJUMP, this) = Physics_ClientOption(this, "track_canjump", autocvar_sv_track_canjump);
68 float IsMoveInDirection(vector mv, float ang) // key mix factor
70 if (mv_x == 0 && mv_y == 0)
71 return 0; // avoid division by zero
72 ang -= RAD2DEG * atan2(mv_y, mv_x);
73 ang = remainder(ang, 360) / 45;
74 return ang > 1 ? 0 : ang < -1 ? 0 : 1 - fabs(ang);
77 float GeomLerp(float a, float _lerp, float b)
79 return a == 0 ? (_lerp < 1 ? 0 : b)
80 : b == 0 ? (_lerp > 0 ? 0 : a)
81 : a * pow(fabs(b / a), _lerp);
84 void PM_ClientMovement_UpdateStatus(entity this)
91 bool do_crouch = PHYS_INPUT_BUTTON_CROUCH(this);
92 if(this.hook && !wasfreed(this.hook))
94 if(this.waterlevel >= WATERLEVEL_SWIMMING)
98 if(STAT(FROZEN, this))
103 // wants to crouch, this always works
104 if (!IS_DUCKED(this)) SET_DUCKED(this);
108 // wants to stand, if currently crouching we need to check for a low ceiling first
111 tracebox(this.origin, STAT(PL_MIN, NULL), STAT(PL_MAX, NULL), this.origin, MOVE_NORMAL, this);
112 if (!trace_startsolid) UNSET_DUCKED(this);
116 if (IS_ONGROUND(this) || this.velocity.z <= 0 || PHYS_WATERJUMP_TIME(this) <= 0)
117 PHYS_WATERJUMP_TIME(this) = 0;
121 void CPM_PM_Aircontrol(entity this, float dt, vector wishdir, float wishspeed)
123 float movity = IsMoveInDirection(this.movement, 0);
124 if(PHYS_AIRCONTROL_BACKWARDS(this))
125 movity += IsMoveInDirection(this.movement, 180);
127 float k = 32 * (2 * movity - 1);
131 k *= bound(0, wishspeed / PHYS_MAXAIRSPEED(this), 1);
133 float zspeed = this.velocity_z;
135 float xyspeed = vlen(this.velocity);
136 this.velocity = normalize(this.velocity);
138 float dot = this.velocity * wishdir;
140 if (dot > 0) // we can't change direction while slowing down
142 k *= pow(dot, PHYS_AIRCONTROL_POWER(this)) * dt;
143 xyspeed = max(0, xyspeed - PHYS_AIRCONTROL_PENALTY(this) * sqrt(max(0, 1 - dot*dot)) * k/32);
144 k *= PHYS_AIRCONTROL(this);
145 this.velocity = normalize(this.velocity * xyspeed + wishdir * k);
148 this.velocity = this.velocity * xyspeed;
149 this.velocity_z = zspeed;
152 float AdjustAirAccelQW(float accelqw, float factor)
154 return copysign(bound(0.000001, 1 - (1 - fabs(accelqw)) * factor, 1), accelqw);
157 // example config for alternate speed clamping:
158 // sv_airaccel_qw 0.8
159 // sv_airaccel_sideways_friction 0
160 // prvm_globalset server speedclamp_mode 1
162 void PM_Accelerate(entity this, float dt, vector wishdir, float wishspeed, float wishspeed0, float accel, float accelqw, float stretchfactor, float sidefric, float speedlimit)
164 float speedclamp = stretchfactor > 0 ? stretchfactor
165 : accelqw < 0 ? 1 // full clamping, no stretch
168 accelqw = fabs(accelqw);
170 if (GAMEPLAYFIX_Q2AIRACCELERATE)
171 wishspeed0 = wishspeed; // don't need to emulate this Q1 bug
173 float vel_straight = this.velocity * wishdir;
174 float vel_z = this.velocity_z;
175 vector vel_xy = vec2(this.velocity);
176 vector vel_perpend = vel_xy - vel_straight * wishdir;
178 float step = accel * dt * wishspeed0;
180 float vel_xy_current = vlen(vel_xy);
182 accelqw = AdjustAirAccelQW(accelqw, (speedlimit - bound(wishspeed, vel_xy_current, speedlimit)) / max(1, speedlimit - wishspeed));
183 float vel_xy_forward = vel_xy_current + bound(0, wishspeed - vel_xy_current, step) * accelqw + step * (1 - accelqw);
184 float vel_xy_backward = vel_xy_current - bound(0, wishspeed + vel_xy_current, step) * accelqw - step * (1 - accelqw);
185 vel_xy_backward = max(0, vel_xy_backward); // not that it REALLY occurs that this would cause wrong behaviour afterwards
186 vel_straight = vel_straight + bound(0, wishspeed - vel_straight, step) * accelqw + step * (1 - accelqw);
188 if (sidefric < 0 && (vel_perpend*vel_perpend))
189 // negative: only apply so much sideways friction to stay below the speed you could get by "braking"
191 float f = max(0, 1 + dt * wishspeed * sidefric);
192 float themin = (vel_xy_backward * vel_xy_backward - vel_straight * vel_straight) / (vel_perpend * vel_perpend);
193 // assume: themin > 1
194 // vel_xy_backward*vel_xy_backward - vel_straight*vel_straight > vel_perpend*vel_perpend
195 // vel_xy_backward*vel_xy_backward > vel_straight*vel_straight + vel_perpend*vel_perpend
196 // vel_xy_backward*vel_xy_backward > vel_xy * vel_xy
197 // obviously, this cannot be
202 themin = sqrt(themin);
203 vel_perpend *= max(themin, f);
207 vel_perpend *= max(0, 1 - dt * wishspeed * sidefric);
209 vel_xy = vel_straight * wishdir + vel_perpend;
213 float vel_xy_preclamp;
214 vel_xy_preclamp = vlen(vel_xy);
215 if (vel_xy_preclamp > 0) // prevent division by zero
217 vel_xy_current += (vel_xy_forward - vel_xy_current) * speedclamp;
218 if (vel_xy_current < vel_xy_preclamp)
219 vel_xy *= (vel_xy_current / vel_xy_preclamp);
223 this.velocity = vel_xy + vel_z * '0 0 1';
226 void PM_AirAccelerate(entity this, float dt, vector wishdir, float wishspeed)
231 vector curvel = this.velocity;
233 float curspeed = vlen(curvel);
235 if (wishspeed > curspeed * 1.01)
236 wishspeed = min(wishspeed, curspeed + PHYS_WARSOWBUNNY_AIRFORWARDACCEL(this) * PHYS_MAXSPEED(this) * dt);
239 float f = max(0, (PHYS_WARSOWBUNNY_TOPSPEED(this) - curspeed) / (PHYS_WARSOWBUNNY_TOPSPEED(this) - PHYS_MAXSPEED(this)));
240 wishspeed = max(curspeed, PHYS_MAXSPEED(this)) + PHYS_WARSOWBUNNY_ACCEL(this) * f * PHYS_MAXSPEED(this) * dt;
242 vector wishvel = wishdir * wishspeed;
243 vector acceldir = wishvel - curvel;
244 float addspeed = vlen(acceldir);
245 acceldir = normalize(acceldir);
247 float accelspeed = min(addspeed, PHYS_WARSOWBUNNY_TURNACCEL(this) * PHYS_MAXSPEED(this) * dt);
249 if (PHYS_WARSOWBUNNY_BACKTOSIDERATIO(this) < 1)
251 vector curdir = normalize(curvel);
252 float dot = acceldir * curdir;
254 acceldir -= (1 - PHYS_WARSOWBUNNY_BACKTOSIDERATIO(this)) * dot * curdir;
257 this.velocity += accelspeed * acceldir;
265 When you press the jump key
266 returns true if handled
269 bool PlayerJump(entity this)
271 if (PHYS_FROZEN(this))
272 return true; // no jumping in freezetag when frozen
275 if (this.player_blocked)
276 return true; // no jumping while blocked
279 bool doublejump = false;
280 float mjumpheight = PHYS_JUMPVELOCITY(this);
282 if (MUTATOR_CALLHOOK(PlayerJump, this, mjumpheight, doublejump))
285 mjumpheight = M_ARGV(1, float);
286 doublejump = M_ARGV(2, bool);
288 if (this.waterlevel >= WATERLEVEL_SWIMMING)
297 this.velocity_z = PHYS_MAXSPEED(this) * 0.7;
303 if (!IS_ONGROUND(this))
304 return IS_JUMP_HELD(this);
306 bool track_jump = PHYS_CL_TRACK_CANJUMP(this);
307 if(PHYS_TRACK_CANJUMP(this))
311 if (IS_JUMP_HELD(this))
314 // sv_jumpspeedcap_min/sv_jumpspeedcap_max act as baseline
315 // velocity bounds. Final velocity is bound between (jumpheight *
316 // min + jumpheight) and (jumpheight * max + jumpheight);
318 if(PHYS_JUMPSPEEDCAP_MIN != "")
320 float minjumpspeed = mjumpheight * stof(PHYS_JUMPSPEEDCAP_MIN);
322 if (this.velocity_z < minjumpspeed)
323 mjumpheight += minjumpspeed - this.velocity_z;
326 if(PHYS_JUMPSPEEDCAP_MAX != "")
328 // don't do jump speedcaps on ramps to preserve old xonotic ramjump style
329 tracebox(this.origin + '0 0 0.01', this.mins, this.maxs, this.origin - '0 0 0.01', MOVE_NORMAL, this);
331 if (!(trace_fraction < 1 && trace_plane_normal_z < 0.98 && PHYS_JUMPSPEEDCAP_DISABLE_ONRAMPS(this)))
333 float maxjumpspeed = mjumpheight * stof(PHYS_JUMPSPEEDCAP_MAX);
335 if (this.velocity_z > maxjumpspeed)
336 mjumpheight -= this.velocity_z - maxjumpspeed;
340 if (!WAS_ONGROUND(this))
343 if(autocvar_speedmeter)
344 LOG_TRACE("landing velocity: ", vtos(this.velocity), " (abs: ", ftos(vlen(this.velocity)), ")");
346 if(this.lastground < time - 0.3)
348 float f = (1 - PHYS_FRICTION_ONLAND(this));
349 this.velocity_x *= f;
350 this.velocity_y *= f;
353 if(this.jumppadcount > 1)
354 LOG_TRACE(ftos(this.jumppadcount), "x jumppad combo");
355 this.jumppadcount = 0;
359 this.velocity_z += mjumpheight;
361 UNSET_ONGROUND(this);
366 this.oldvelocity_z = this.velocity_z;
368 animdecide_setaction(this, ANIMACTION_JUMP, true);
370 if (autocvar_g_jump_grunt)
371 PlayerSound(this, playersound_jump, CH_PLAYER, VOL_BASE, VOICETYPE_PLAYERSOUND);
376 void CheckWaterJump(entity this)
378 // check for a jump-out-of-water
379 makevectors(this.v_angle);
380 vector start = this.origin;
383 normalize(v_forward);
384 vector end = start + v_forward*24;
385 traceline (start, end, true, this);
386 if (trace_fraction < 1)
388 start_z = start_z + this.maxs_z - 8;
389 end = start + v_forward*24;
390 this.movedir = trace_plane_normal * -50;
391 traceline(start, end, true, this);
392 if (trace_fraction == 1)
393 { // open at eye level
394 this.velocity_z = 225;
395 this.flags |= FL_WATERJUMP;
398 PHYS_TELEPORT_TIME(this) = time + 2; // safety net
400 PHYS_WATERJUMP_TIME(this) = 2;
408 #define JETPACK_JUMP(s) s.cvar_cl_jetpack_jump
410 float autocvar_cl_jetpack_jump;
411 #define JETPACK_JUMP(s) autocvar_cl_jetpack_jump
413 .float jetpack_stopped;
414 void CheckPlayerJump(entity this)
417 bool was_flying = boolean(ITEMS_STAT(this) & IT_USING_JETPACK);
419 if (JETPACK_JUMP(this) < 2)
420 ITEMS_STAT(this) &= ~IT_USING_JETPACK;
422 if(PHYS_INPUT_BUTTON_JUMP(this) || PHYS_INPUT_BUTTON_JETPACK(this))
424 bool playerjump = PlayerJump(this); // required
426 bool air_jump = !playerjump || M_ARGV(2, bool);
427 bool activate = JETPACK_JUMP(this) && air_jump && PHYS_INPUT_BUTTON_JUMP(this) || PHYS_INPUT_BUTTON_JETPACK(this);
428 bool has_fuel = !PHYS_JETPACK_FUEL(this) || PHYS_AMMO_FUEL(this) || (ITEMS_STAT(this) & IT_UNLIMITED_WEAPON_AMMO);
430 if (!(ITEMS_STAT(this) & ITEM_Jetpack.m_itemid)) { }
431 else if (this.jetpack_stopped) { }
435 if (was_flying) // TODO: ran out of fuel message
436 Send_Notification(NOTIF_ONE, this, MSG_INFO, INFO_JETPACK_NOFUEL);
438 Send_Notification(NOTIF_ONE, this, MSG_INFO, INFO_JETPACK_NOFUEL);
440 this.jetpack_stopped = true;
441 ITEMS_STAT(this) &= ~IT_USING_JETPACK;
443 else if (activate && !PHYS_FROZEN(this))
444 ITEMS_STAT(this) |= IT_USING_JETPACK;
448 this.jetpack_stopped = false;
449 ITEMS_STAT(this) &= ~IT_USING_JETPACK;
451 if (!PHYS_INPUT_BUTTON_JUMP(this))
452 UNSET_JUMP_HELD(this);
454 if (this.waterlevel == WATERLEVEL_SWIMMING)
455 CheckWaterJump(this);
458 float racecar_angle(float forward, float down)
466 float ret = vectoyaw('0 1 0' * down + '1 0 0' * forward);
468 float angle_mult = forward / (800 + forward);
471 return ret * angle_mult + 360 * (1 - angle_mult);
473 return ret * angle_mult;
476 string specialcommand = "xwxwxsxsxaxdxaxdx1x ";
477 .float specialcommand_pos;
478 void SpecialCommand(entity this)
481 if (!CheatImpulse(this, CHIMPULSE_GIVE_ALL.impulse))
482 LOG_INFO("A hollow voice says \"Plugh\".\n");
486 bool PM_check_specialcommand(entity this, int buttons)
492 else if (buttons == 1)
494 else if (buttons == 2)
496 else if (buttons == 128)
498 else if (buttons == 256)
500 else if (buttons == 512)
502 else if (buttons == 1024)
507 if (c == substring(specialcommand, this.specialcommand_pos, 1))
509 this.specialcommand_pos += 1;
510 if (this.specialcommand_pos >= strlen(specialcommand))
512 this.specialcommand_pos = 0;
513 SpecialCommand(this);
517 else if (this.specialcommand_pos && (c != substring(specialcommand, this.specialcommand_pos - 1, 1)))
518 this.specialcommand_pos = 0;
523 void PM_check_nickspam(entity this)
526 if (time >= this.nickspamtime)
528 if (this.nickspamcount >= autocvar_g_nick_flood_penalty_yellow)
530 // slight annoyance for nick change scripts
531 this.movement = -1 * this.movement;
532 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;
534 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!
536 this.v_angle_x = random() * 360;
537 this.v_angle_y = random() * 360;
538 // at least I'm not forcing retardedview by also assigning to angles_z
539 this.fixangle = true;
545 void PM_check_punch(entity this, float dt)
548 if (this.punchangle != '0 0 0')
550 float f = vlen(this.punchangle) - 10 * dt;
552 this.punchangle = normalize(this.punchangle) * f;
554 this.punchangle = '0 0 0';
557 if (this.punchvector != '0 0 0')
559 float f = vlen(this.punchvector) - 30 * dt;
561 this.punchvector = normalize(this.punchvector) * f;
563 this.punchvector = '0 0 0';
568 // predict frozen movement, as frozen players CAN move in some cases
569 void PM_check_frozen(entity this)
571 if (!PHYS_FROZEN(this))
573 if (PHYS_DODGING_FROZEN(this)
575 && IS_REAL_CLIENT(this)
579 this.movement_x = bound(-5, this.movement.x, 5);
580 this.movement_y = bound(-5, this.movement.y, 5);
581 this.movement_z = bound(-5, this.movement.z, 5);
584 this.movement = '0 0 0';
586 vector midpoint = ((this.absmin + this.absmax) * 0.5);
587 if (pointcontents(midpoint) == CONTENT_WATER)
589 this.velocity = this.velocity * 0.5;
591 if (pointcontents(midpoint + '0 0 16') == CONTENT_WATER)
592 this.velocity_z = 200;
596 void PM_check_hitground(entity this)
599 if (!this.wasFlying) return;
600 this.wasFlying = false;
601 if (this.waterlevel >= WATERLEVEL_SWIMMING) return;
602 if (time < this.ladder_time) return;
603 if (this.hook) return;
604 this.nextstep = time + 0.3 + random() * 0.1;
605 trace_dphitq3surfaceflags = 0;
606 tracebox(this.origin, this.mins, this.maxs, this.origin - '0 0 1', MOVE_NOMONSTERS, this);
607 if (trace_dphitq3surfaceflags & Q3SURFACEFLAG_NOSTEPS) return;
608 entity gs = (trace_dphitq3surfaceflags & Q3SURFACEFLAG_METALSTEPS)
611 float vol = ((IS_DUCKED(this)) ? VOL_MUFFLED : VOL_BASE);
612 GlobalSound(this, gs, CH_PLAYER, vol, VOICETYPE_PLAYERSOUND);
616 void PM_Footsteps(entity this)
619 if (!g_footsteps) return;
620 if (IS_DUCKED(this)) return;
621 if (time >= this.lastground + 0.2) return;
622 if (vdist(this.velocity, <=, autocvar_sv_maxspeed * 0.6)) return;
623 if ((time > this.nextstep) || (time < (this.nextstep - 10.0)))
625 this.nextstep = time + 0.3 + random() * 0.1;
626 trace_dphitq3surfaceflags = 0;
627 tracebox(this.origin, this.mins, this.maxs, this.origin - '0 0 1', MOVE_NOMONSTERS, this);
628 if (trace_dphitq3surfaceflags & Q3SURFACEFLAG_NOSTEPS) return;
629 entity gs = (trace_dphitq3surfaceflags & Q3SURFACEFLAG_METALSTEPS)
632 GlobalSound(this, gs, CH_PLAYER, VOL_BASE, VOICETYPE_PLAYERSOUND);
637 void PM_check_blocked(entity this)
640 if (!this.player_blocked)
642 this.movement = '0 0 0';
643 this.disableclientprediction = 1;
649 void PM_jetpack(entity this, float maxspd_mod, float dt)
651 //makevectors(this.v_angle.y * '0 1 0');
652 makevectors(this.v_angle);
653 vector wishvel = v_forward * this.movement_x
654 + v_right * this.movement_y;
655 // add remaining speed as Z component
656 float maxairspd = PHYS_MAXAIRSPEED(this) * max(1, maxspd_mod);
658 wishvel = normalize(wishvel) * min(1, vlen(wishvel) / maxairspd);
659 // add the unused velocity as up component
662 // if (PHYS_INPUT_BUTTON_JUMP(this))
663 wishvel_z = sqrt(max(0, 1 - wishvel * wishvel));
665 // it is now normalized, so...
666 float a_side = PHYS_JETPACK_ACCEL_SIDE(this);
667 float a_up = PHYS_JETPACK_ACCEL_UP(this);
668 float a_add = PHYS_JETPACK_ANTIGRAVITY(this) * PHYS_GRAVITY(this);
670 if(PHYS_JETPACK_REVERSE_THRUST(this) && PHYS_INPUT_BUTTON_CROUCH(self)) { a_up = PHYS_JETPACK_REVERSE_THRUST(this); }
677 if(PHYS_JETPACK_REVERSE_THRUST(this) && PHYS_INPUT_BUTTON_CROUCH(self)) { wishvel_z *= -1; }
680 //////////////////////////////////////////////////////////////////////////////////////
681 // finding the maximum over all vectors of above form
682 // with wishvel having an absolute value of 1
683 //////////////////////////////////////////////////////////////////////////////////////
684 // we're finding the maximum over
685 // f(a_side, a_up, a_add, z) := a_side * (1 - z^2) + (a_add + a_up * z)^2;
686 // for z in the range from -1 to 1
687 //////////////////////////////////////////////////////////////////////////////////////
688 // maximum is EITHER attained at the single extreme point:
689 float a_diff = a_side * a_side - a_up * a_up;
693 f = a_add * a_up / a_diff; // this is the zero of diff(f(a_side, a_up, a_add, z), z)
694 if (f > -1 && f < 1) // can it be attained?
696 best = (a_diff + a_add * a_add) * (a_diff + a_up * a_up) / a_diff;
700 // OR attained at z = 1:
701 f = (a_up + a_add) * (a_up + a_add);
707 // OR attained at z = -1:
708 f = (a_up - a_add) * (a_up - a_add);
715 //////////////////////////////////////////////////////////////////////////////////////
717 //print("best possible acceleration: ", ftos(best), "\n");
720 fxy = bound(0, 1 - (this.velocity * normalize(wishvel_x * '1 0 0' + wishvel_y * '0 1 0')) / PHYS_JETPACK_MAXSPEED_SIDE(this), 1);
721 if (wishvel_z - PHYS_GRAVITY(this) > 0)
722 fz = bound(0, 1 - this.velocity_z / PHYS_JETPACK_MAXSPEED_UP(this), 1);
724 fz = bound(0, 1 + this.velocity_z / PHYS_JETPACK_MAXSPEED_UP(this), 1);
727 fvel = vlen(wishvel);
730 wishvel_z = (wishvel_z - PHYS_GRAVITY(this)) * fz + PHYS_GRAVITY(this);
732 fvel = min(1, vlen(wishvel) / best);
733 if (PHYS_JETPACK_FUEL(this) && !(ITEMS_STAT(this) & IT_UNLIMITED_WEAPON_AMMO))
734 f = min(1, PHYS_AMMO_FUEL(this) / (PHYS_JETPACK_FUEL(this) * dt * fvel));
738 //print("this acceleration: ", ftos(vlen(wishvel) * f), "\n");
740 if (f > 0 && wishvel != '0 0 0')
742 this.velocity = this.velocity + wishvel * f * dt;
743 UNSET_ONGROUND(this);
746 if (!(ITEMS_STAT(this) & IT_UNLIMITED_WEAPON_AMMO))
747 this.ammo_fuel -= PHYS_JETPACK_FUEL(this) * dt * fvel * f;
749 ITEMS_STAT(this) |= IT_USING_JETPACK;
751 // jetpack also inhibits health regeneration, but only for 1 second
752 this.pauseregen_finished = max(this.pauseregen_finished, time + autocvar_g_balance_pause_fuel_regen);
757 // used for calculating airshots
758 bool IsFlying(entity this)
760 if(IS_ONGROUND(this))
762 if(this.waterlevel >= WATERLEVEL_SWIMMING)
764 traceline(this.origin, this.origin - '0 0 48', MOVE_NORMAL, this);
765 if(trace_fraction < 1)
771 void sys_phys_update(entity this, float dt);
773 void SV_PlayerPhysics(entity this)
775 void CSQC_ClientMovement_PlayerMove_Frame(entity this)
778 sys_phys_update(this, PHYS_INPUT_TIMELENGTH);
781 this.pm_frametime = frametime;