#pragma once

void SUB_NullThink(entity this);

void SUB_CalcMoveDone(entity this);
void SUB_CalcAngleMoveDone(entity this);

spawnfunc(info_null);

/*
==================
SUB_Friction

Applies some friction to this
==================
*/
.float friction;
void SUB_Friction (entity this);

/*
==================
SUB_VanishOrRemove

Makes client invisible or removes non-client
==================
*/
void SUB_VanishOrRemove (entity ent);

void SUB_SetFade_Think (entity this);

/*
==================
SUB_SetFade

Fade 'ent' out when time >= 'when'
==================
*/
void SUB_SetFade (entity ent, float when, float fadetime);

/*
=============
SUB_CalcMove

calculate this.velocity and this.nextthink to reach dest from
this.origin traveling at speed
===============
*/
void SUB_CalcMoveDone(entity this);

.float platmovetype_turn;
void SUB_CalcMove_controller_think (entity this);

void SUB_CalcMove_controller_setbezier (entity controller, vector org, vector control, vector dest);

void SUB_CalcMove_controller_setlinear (entity controller, vector org, vector dest);

void SUB_CalcMove_Bezier (entity this, vector tcontrol, vector tdest, float tspeedtype, float tspeed, void(entity this) func);

void SUB_CalcMove (entity this, vector tdest, float tspeedtype, float tspeed, void(entity this) func);

void SUB_CalcMoveEnt (entity ent, vector tdest, float tspeedtype, float tspeed, void(entity this) func);

/*
=============
SUB_CalcAngleMove

calculate this.avelocity and this.nextthink to reach destangle from
this.angles rotating

The calling function should make sure this.think is valid
===============
*/
void SUB_CalcAngleMoveDone (entity this);

// FIXME: I fixed this function only for rotation around the main axes
void SUB_CalcAngleMove (entity this, vector destangle, float tspeedtype, float tspeed, void(entity this) func);

void SUB_CalcAngleMoveEnt (entity ent, vector destangle, float tspeedtype, float tspeed, void(entity this) func);

/*
==================
main

unused but required by the engine
==================
*/
void main ();

// Misc

/*
==================
traceline_antilag

A version of traceline that must be used by SOLID_SLIDEBOX things that want to hit SOLID_CORPSE things with a trace attack
Additionally it moves players back into the past before the trace and restores them afterward.
==================
*/
void tracebox_antilag_force_wz (entity source, vector v1, vector mi, vector ma, vector v2, float nomonst, entity forent, float lag, float wz);
void traceline_antilag_force (entity source, vector v1, vector v2, float nomonst, entity forent, float lag);
void traceline_antilag (entity source, vector v1, vector v2, float nomonst, entity forent, float lag);
void tracebox_antilag (entity source, vector v1, vector mi, vector ma, vector v2, float nomonst, entity forent, float lag);
void WarpZone_traceline_antilag_force (entity source, vector v1, vector v2, float nomonst, entity forent, float lag);
void WarpZone_traceline_antilag (entity source, vector v1, vector v2, float nomonst, entity forent, float lag);
void WarpZone_tracebox_antilag (entity source, vector v1, vector mi, vector ma, vector v2, float nomonst, entity forent, float lag);

float tracebox_inverted (vector v1, vector mi, vector ma, vector v2, float nomonsters, entity forent, float stopatentity, entity ignorestopatentity); // returns the number of traces done, for benchmarking

void traceline_inverted (vector v1, vector v2, float nomonsters, entity forent, float stopatentity, entity ignorestopatentity);

/*
==================
findbetterlocation

Returns a point at least 12 units away from walls
(useful for explosion animations, although the blast is performed where it really happened)
Ripped from DPMod
==================
*/
vector findbetterlocation (vector org, float mindist);

/*
==================
Angc used for animations
==================
*/


float angc (float a1, float a2);

.string lodtarget1;
.string lodtarget2;
.string lodmodel1;
.string lodmodel2;
.float lodmodelindex0;
.float lodmodelindex1;
.float lodmodelindex2;
.float loddistance1;
.float loddistance2;

bool LOD_customize(entity this, entity client);

void LOD_uncustomize(entity this);

void LODmodel_attach(entity this);

void ApplyMinMaxScaleAngles(entity e);

void SetBrushEntityModel(entity this);

void SetBrushEntityModelNoLOD(entity this);

/*
================
InitTrigger
================
*/

void SetMovedir(entity this);

void InitTrigger(entity this);

void InitSolidBSPTrigger(entity this);

bool InitMovingBrushTrigger(entity this);