common.qc

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#include "common.qh"
 
#include <common/checkextension.qh>
 
#ifdef CSQC
    #include <client/items/items.qh>
#elifdef SVQC
    #include <common/weapons/_all.qh>
#endif
 
void WarpZone_Accumulator_Clear(entity acc)
{
    acc.warpzone_transform = '0 0 0';
    acc.warpzone_shift = '0 0 0';
}
void WarpZone_Accumulator_AddTransform(entity acc, vector t, vector s)
{
    vector tr = AnglesTransform_Multiply(t, acc.warpzone_transform);
    vector st = AnglesTransform_Multiply_GetPostShift(t, s, acc.warpzone_transform, acc.warpzone_shift);
    acc.warpzone_transform = tr;
    acc.warpzone_shift = st;
}
#define WarpZone_Accumulator_Add(acc, wz) \
    WarpZone_Accumulator_AddTransform(acc, (wz).warpzone_transform, (wz).warpzone_shift)
void WarpZone_Accumulator_AddInverseTransform(entity acc, vector t, vector s)
{
    vector tt = AnglesTransform_Invert(t);
    vector ss = AnglesTransform_PrePostShift_GetPostShift(s, tt, '0 0 0');
    WarpZone_Accumulator_AddTransform(acc, tt, ss);
    // yes, this probably can be done simpler... but this way is "obvious" :)
}
#define WarpZone_Accumulator_AddInverse(acc, wz) \
    WarpZone_Accumulator_AddInverseTransform(acc, (wz).warpzone_transform, (wz).warpzone_shift)
 
vector WarpZone_camera_transform(entity this, vector org, vector ang)
{
    if (this.warpzone_fadestart
    && vdist(org - this.origin - 0.5 * (this.mins + this.maxs), >, this.warpzone_fadeend + 400))
        return org;
        // don't transform if zone faded out (plus 400qu safety margin for typical speeds and latencies)
        // unneeded on client, on server this helps a lot
    vector vf = v_forward;
    vector vr = v_right;
    vector vu = v_up;
    org = WarpZone_TransformOrigin(this, org);
    vf  = WarpZone_TransformVelocity(this, vf);
    vr  = WarpZone_TransformVelocity(this, vr);
    vu  = WarpZone_TransformVelocity(this, vu);
    traceline(this.warpzone_targetorigin, org, MOVE_NOMONSTERS, NULL);
    v_forward = vf;
    v_right = vr;
    v_up = vu;
    return org;
}
 
void WarpZone_SetUp(entity e, vector my_org, vector my_ang, vector other_org, vector other_ang)
{
    e.warpzone_transform = AnglesTransform_RightDivide(other_ang, AnglesTransform_TurnDirectionFR(my_ang));
    e.warpzone_shift = AnglesTransform_PrePostShift_GetPostShift(my_org, e.warpzone_transform, other_org);
    e.warpzone_origin = my_org;
    e.warpzone_targetorigin = other_org;
    e.warpzone_angles = my_ang;
    e.warpzone_targetangles = other_ang;
    vector forward, right, up;
    FIXED_MAKE_VECTORS(my_ang, forward, right, up);
    e.warpzone_forward = forward;
    FIXED_MAKE_VECTORS(other_ang, forward, right, up);
    e.warpzone_targetforward = forward;
    setcamera_transform(e, WarpZone_camera_transform);
}
 
vector WarpZone_Camera_camera_transform(entity this, vector org, vector ang)
{
    // a fixed camera view
    if (this.warpzone_fadestart
    && vdist(org - this.origin - 0.5 * (this.mins + this.maxs), >, this.warpzone_fadeend + 400))
        return org;
        // don't transform if zone faded out (plus 400qu safety margin for typical speeds and latencies)
        // unneeded on client, on server this helps a lot
    trace_endpos = this.warpzone_origin;
    makevectors(this.warpzone_angles);
    return this.warpzone_origin;
}
 
void WarpZone_Camera_SetUp(entity e, vector my_org, vector my_ang) // we assume that e.oldorigin and e.avelocity point to view origin and direction
{
    e.warpzone_origin = my_org;
    e.warpzone_angles = my_ang;
    setcamera_transform(e, WarpZone_Camera_camera_transform);
}
 
float WarpZoneLib_BoxTouchesBrush_Recurse(vector mi, vector ma, entity e, entity ig)
{
    tracebox('0 0 0', mi, ma, '0 0 0', MOVE_NOMONSTERS, ig);
#ifdef CSQC
    if (trace_networkentity)
    {
        LOG_TRACE("hit a network ent, cannot continue WarpZoneLib_BoxTouchesBrush");
        // we cannot continue, as a player blocks us...
        // so, abort
        return 0;
    }
#endif
    if (!trace_ent)
        return 0;
    if (trace_ent == e)
        return 1;
 
    entity se = trace_ent;
    float s = se.solid;
    se.solid = SOLID_NOT;
    setorigin(se, se.origin); // unlink
    float f = WarpZoneLib_BoxTouchesBrush_Recurse(mi, ma, e, ig);
    se.solid = s;
    setorigin(se, se.origin); // relink
 
    return f;
}
 
float WarpZoneLib_BoxTouchesBrush(vector mi, vector ma, entity e, entity ig)
{
    // bones_was_here: TODO: when findbox_OrFallback() is available, use it to
    // optimise this into a single non-recursive function that only calls tracebox once
 
    if (!e.modelindex || e.warpzone_isboxy)
        return 1;
 
    // work around trigger_hurt on geit3ctf1 not being detected by tracebox
    // bones_was_here: FIXME: WHY do these triggers only have supercontents == 128 ?!
    if (Q3COMPAT_COMMON && ig != world)
        ig.dphitcontentsmask |= 128;
 
    float s = e.solid;
    if (e.solid != SOLID_BSP)
    {
        e.solid = SOLID_BSP;
        setorigin(e, e.origin); // update linking
    }
    float f = WarpZoneLib_BoxTouchesBrush_Recurse(mi, ma, e, ig);
    if (e.solid != s) // if we needed to change .solid temporarily
    {
        e.solid = s; // restore it
        setorigin(e, e.origin); // update linking
    }
 
    if (Q3COMPAT_COMMON && ig != world)
        ig.dphitcontentsmask &= ~128;
 
    return f;
}
 
entity WarpZone_Find(vector mi, vector ma)
{
    // if we are near any warpzone planes - MOVE AWAY (work around nearclip)
    if (warpzone_warpzones_exist)
        IL_EACH(g_warpzones, WarpZoneLib_BoxTouchesBrush(mi, ma, it, NULL), return it);
    return NULL;
}
 
void WarpZone_MakeAllSolid()
{
    if (warpzone_warpzones_exist)
        IL_EACH(g_warpzones, true, it.solid = SOLID_BSP);
}
 
void WarpZone_MakeAllOther()
{
    if (warpzone_warpzones_exist)
        IL_EACH(g_warpzones, true, it.solid = SOLID_TRIGGER);
}
 
void WarpZone_Trace_InitTransform()
{
    if (!WarpZone_trace_transform)
        WarpZone_trace_transform = new_pure(warpzone_trace_transform);
    WarpZone_Accumulator_Clear(WarpZone_trace_transform);
}
#define WarpZone_Trace_AddTransform(wz) \
    WarpZone_Accumulator_Add(WarpZone_trace_transform, wz)

void WarpZone_TraceBox_ThroughZone(vector org, vector mi, vector ma, vector end, float nomonsters, entity forent, entity zone, WarpZone_trace_callback_t cb)
{
    WarpZone_trace_forent = forent;
    WarpZone_trace_firstzone = NULL;
    WarpZone_trace_lastzone = NULL;
    WarpZone_Trace_InitTransform();
 
    bool nearby_warpzones = false;
    // use tracebox if no warpzone is touching the box the entity would be traced through
    if (warpzone_warpzones_exist)
    {
        vector boxmin = mi;
        vector boxmax = ma;
    #define CHOOSE_AXIS(axis) \
        if (org.axis < end.axis) {  boxmin.axis += org.axis;  boxmax.axis += end.axis;  } \
        else                     {  boxmin.axis += end.axis;  boxmax.axis += org.axis;  }
        CHOOSE_AXIS(x);
        CHOOSE_AXIS(y);
        CHOOSE_AXIS(z);
    #undef CHOOSE_AXIS
        /* Above is equivalent to the following, but more efficient
         *     boxmin += vec_to_min(org, end);
         *     boxmax += vec_to_max(org, end);
         */
        IL_EACH(g_warpzones, boxesoverlap(it.absmin, it.absmax, boxmin, boxmax),
        {
            nearby_warpzones = true;
            break;
        });
    }
    if (!nearby_warpzones)
    {
        if (nomonsters == MOVE_NOTHING)
        {
            trace_endpos = end;
            trace_fraction = 1;
        }
        else
            tracebox(org, mi, ma, end, nomonsters, WarpZone_trace_forent);
 
        if (cb)
            cb(org, trace_endpos, end);
        return;
    }
 
    vector vf = v_forward;
    vector vr = v_right;
    vector vu = v_up;
 
    float nomonsters_adjusted;
    switch (nomonsters)
    {
        case MOVE_WORLDONLY:
        case MOVE_NOTHING:
            nomonsters_adjusted = MOVE_NOMONSTERS;
            break;
        default:
            nomonsters_adjusted = nomonsters;
            break;
    }
    bool contents_hack = (WarpZone_trace_forent.dphitcontentsmask && !(WarpZone_trace_forent.dphitcontentsmask & DPCONTENTS_SOLID));
    if (contents_hack)
        BITSET_ASSIGN(WarpZone_trace_forent.dphitcontentsmask, DPCONTENTS_SOLID);
 
    // if starting in warpzone, first transform
    entity wz = WarpZone_Find(org + mi, org + ma);
    float sol;
    if (wz)
    {
        WarpZone_trace_firstzone = wz;
        WarpZone_trace_lastzone = wz;
        if (zone && wz != zone)
        {
            // we are in ANOTHER warpzone. This is bad. Make a zero length trace and return.
            sol = 1;
            trace_fraction = 0;
            trace_endpos = org;
            goto fail;
        }
        WarpZone_Trace_AddTransform(wz);
        org = WarpZone_TransformOrigin(wz, org);
        end = WarpZone_TransformOrigin(wz, end);
    }
    WarpZone_MakeAllSolid();
    sol = -1;
    float frac = 0;
    float i = 16;
    for (;;)
    {
        if (--i < 1)
        {
            LOG_TRACE("Too many warpzones in sequence, aborting trace.");
            trace_ent = NULL;
            break;
        }
        tracebox(org, mi, ma, end, nomonsters_adjusted, WarpZone_trace_forent);
        if (cb)
            cb(org, trace_endpos, end);
        if (sol < 0)
            sol = trace_startsolid;
 
        frac = trace_fraction = frac + (1 - frac) * trace_fraction;
        if (trace_fraction >= 1)
            break;
        if (trace_ent.classname != "trigger_warpzone")
        {
            if (nomonsters == MOVE_NOTHING
            || (nomonsters == MOVE_WORLDONLY && trace_ent)
            || (contents_hack && (trace_dphitcontents & WarpZone_trace_forent.dphitcontentsmask) == DPCONTENTS_SOLID))
            {
                // continue the trace, ignoring this hit (we only care for warpzones)
                org = trace_endpos + normalize(end - org);
                continue;
                // we cannot do an inverted trace here, as we do care for further warpzones inside that "solid" to be found
                // otherwise, players could block entrances that way
            }
            break;
        }
        /*if (trace_ent == wz)
        {
            // FIXME can this check be removed? Do we really need it?
            LOG_TRACE("I transformed into the same zone again, wtf, aborting the trace");
            trace_ent = NULL;
            break;
        }*/
        wz = trace_ent;
        if (!WarpZone_trace_firstzone)
            WarpZone_trace_firstzone = wz;
        WarpZone_trace_lastzone = wz;
        if (zone && wz != zone)
            break;
        WarpZone_Trace_AddTransform(wz);
        // we hit a warpzone... so, let's perform the trace after the warp again
        org = WarpZone_TransformOrigin(wz, trace_endpos);
        end = WarpZone_TransformOrigin(wz, end);
 
        // we got warped, so let's step back a bit
        tracebox(org, mi, ma, org + normalize(org - end) * 32, nomonsters_adjusted, WarpZone_trace_forent);
        org = trace_endpos;
    }
    WarpZone_MakeAllOther();
LABEL(fail)
    if (contents_hack)
        BITCLR_ASSIGN(WarpZone_trace_forent.dphitcontentsmask, DPCONTENTS_SOLID);
    trace_startsolid = sol;
    v_forward = vf;
    v_right = vr;
    v_up = vu;
}

void WarpZone_TraceToss_ThroughZone(entity e, entity forent, entity zone, WarpZone_trace_callback_t cb)
{
    vector o0 = e.origin;
    vector v0 = e.velocity;
    float dt, i, g = PHYS_GRAVITY(NULL) * e.gravity;
 
    WarpZone_trace_forent = forent;
    WarpZone_trace_firstzone = NULL;
    WarpZone_trace_lastzone = NULL;
    WarpZone_Trace_InitTransform();
    WarpZone_tracetoss_time = 0;
    if (!warpzone_warpzones_exist)
    {
        tracetoss(e, WarpZone_trace_forent);
        if (cb)
            cb(e.origin, trace_endpos, trace_endpos);
        dt = sqrt(vlen2(e.origin - o0) / vlen2(e.velocity));
        WarpZone_tracetoss_time += dt;
        e.velocity.z -= dt * g;
        WarpZone_tracetoss_velocity = e.velocity;
        e.velocity = v0;
        return;
    }
 
    vector vf = v_forward;
    vector vr = v_right;
    vector vu = v_up;
 
    // if starting in warpzone, first transform
    entity wz = WarpZone_Find(e.origin + e.mins, e.origin + e.maxs);
    if (wz)
    {
        WarpZone_trace_firstzone = wz;
        WarpZone_trace_lastzone = wz;
        if (zone && wz != zone)
        {
            // we are in ANOTHER warpzone. This is bad. Make a zero length trace and return.
 
            WarpZone_tracetoss_time = 0;
            trace_endpos = o0;
            goto fail;
        }
        WarpZone_Trace_AddTransform(wz);
        vector org = WarpZone_TransformOrigin(wz, e.origin);
        setorigin(e, org);
        e.velocity = WarpZone_TransformVelocity(wz, e.velocity);
    }
    WarpZone_MakeAllSolid();
    i = 16;
    for (;;)
    {
        if (--i < 1)
        {
            LOG_TRACE("Too many warpzones in sequence, aborting trace.");
            trace_ent = NULL;
            break;
        }
        tracetoss(e, WarpZone_trace_forent);
        if (cb)
            cb(e.origin, trace_endpos, trace_endpos);
        dt = sqrt(vlen2(trace_endpos - e.origin) / vlen2(e.velocity));
        WarpZone_tracetoss_time += dt;
        e.origin = trace_endpos;
        e.velocity.z -= dt * g;
        if (trace_fraction >= 1)
            break;
        if (trace_ent.classname != "trigger_warpzone")
            break;
        if (trace_ent == wz)
        {
            // FIXME can this check be removed? Do we really need it?
            LOG_TRACE("I transformed into the same zone again, wtf, aborting the trace");
            trace_ent = NULL;
            break;
        }
        wz = trace_ent;
        if (!WarpZone_trace_firstzone)
            WarpZone_trace_firstzone = wz;
        WarpZone_trace_lastzone = wz;
        if (zone && wz != zone)
            break;
        WarpZone_Trace_AddTransform(wz);
        // we hit a warpzone... so, let's perform the trace after the warp again
        e.origin = WarpZone_TransformOrigin(wz, e.origin);
        e.velocity = WarpZone_TransformVelocity(wz, e.velocity);
 
        // we got warped, so let's step back a bit
        e.velocity = -e.velocity;
        tracetoss(e, WarpZone_trace_forent);
        dt = sqrt(vlen2(trace_endpos - e.origin) / vlen2(e.velocity));
        WarpZone_tracetoss_time -= dt;
        e.origin = trace_endpos;
        e.velocity = -e.velocity;
    }
    WarpZone_MakeAllOther();
LABEL(fail)
    WarpZone_tracetoss_velocity = e.velocity;
    v_forward = vf;
    v_right = vr;
    v_up = vu;
    // restore old entity data (caller just uses trace_endpos, WarpZone_tracetoss_velocity and the transform)
    e.velocity = v0;
    e.origin = o0;
}
 
entity WarpZone_TrailParticles_trace_callback_own;
float WarpZone_TrailParticles_trace_callback_eff;
void WarpZone_TrailParticles_trace_callback(vector from, vector endpos, vector to)
{
    __trailparticles(WarpZone_TrailParticles_trace_callback_own, WarpZone_TrailParticles_trace_callback_eff, from, endpos);
}
 
void WarpZone_TrailParticles(entity own, float eff, vector org, vector end)
{
    WarpZone_TrailParticles_trace_callback_own = own;
    WarpZone_TrailParticles_trace_callback_eff = eff;
    WarpZone_TraceLine_ThroughZone(org, end, MOVE_NOMONSTERS, NULL, NULL, WarpZone_TrailParticles_trace_callback);
}

void te_csqc_trace_callback(vector start, vector hit, vector end)
{
    te_csqc_trace_callback_func(start, hit);
}
 
#ifdef CSQC
float WarpZone_TrailParticles_trace_callback_f;
float WarpZone_TrailParticles_trace_callback_flags;
void WarpZone_TrailParticles_WithMultiplier_trace_callback(vector from, vector endpos, vector to)
{
    boxparticles(WarpZone_TrailParticles_trace_callback_eff, WarpZone_TrailParticles_trace_callback_own, from, endpos, WarpZone_TrailParticles_trace_callback_own.velocity, WarpZone_TrailParticles_trace_callback_own.velocity, WarpZone_TrailParticles_trace_callback_f, WarpZone_TrailParticles_trace_callback_flags);
}
 
void WarpZone_TrailParticles_WithMultiplier(entity own, float eff, vector org, vector end, float f, int boxflags)
{
    WarpZone_TrailParticles_trace_callback_own = own;
    WarpZone_TrailParticles_trace_callback_eff = eff;
    WarpZone_TrailParticles_trace_callback_f = f;
    WarpZone_TrailParticles_trace_callback_flags = boxflags | PARTICLES_DRAWASTRAIL;
    WarpZone_TraceLine_ThroughZone(org, end, MOVE_NOMONSTERS, NULL, NULL, WarpZone_TrailParticles_WithMultiplier_trace_callback);
}
#endif
 
float WarpZone_PlaneDist(entity wz, vector p)
{
    return (p - wz.warpzone_origin) * wz.warpzone_forward;
}
 
float WarpZone_TargetPlaneDist(entity wz, vector p)
{
    return (p - wz.warpzone_targetorigin) * wz.warpzone_targetforward;
}

vector WarpZone_TransformOrigin(entity wz, vector org)
{
    return wz.warpzone_shift + AnglesTransform_Apply(wz.warpzone_transform, org);
}

vector WarpZone_TransformVelocity(entity wz, vector vel)
{
    return AnglesTransform_Apply(wz.warpzone_transform, vel);
}

vector WarpZone_TransformAngles(entity wz, vector ang)
{
    return AnglesTransform_ApplyToAngles(wz.warpzone_transform, ang);
}

vector WarpZone_TransformVAngles(entity wz, vector ang)
{
#ifdef KEEP_ROLL
    float roll = ang.z;
    ang.z = 0;
#endif
 
    ang = AnglesTransform_ApplyToVAngles(wz.warpzone_transform, ang);
#ifdef KEEP_ROLL
    ang = AnglesTransform_Normalize(ang, true);
    ang = AnglesTransform_CancelRoll(ang);
    ang.z = roll;
#else
    ang = AnglesTransform_Normalize(ang, false);
#endif
    return ang;
}

vector WarpZone_UnTransformOrigin(entity wz, vector org)
{
    return AnglesTransform_Apply(AnglesTransform_Invert(wz.warpzone_transform), org - wz.warpzone_shift);
}

vector WarpZone_UnTransformVelocity(entity wz, vector vel)
{
    return AnglesTransform_Apply(AnglesTransform_Invert(wz.warpzone_transform), vel);
}

vector WarpZone_UnTransformAngles(entity wz, vector ang)
{
    return AnglesTransform_ApplyToAngles(AnglesTransform_Invert(wz.warpzone_transform), ang);
}

vector WarpZone_UnTransformVAngles(entity wz, vector ang)
{
#ifdef KEEP_ROLL
    float roll = ang.z;
    ang.z = 0;
#endif
 
    ang = AnglesTransform_ApplyToVAngles(AnglesTransform_Invert(wz.warpzone_transform), ang);
#ifdef KEEP_ROLL
    ang = AnglesTransform_Normalize(ang, true);
    ang = AnglesTransform_CancelRoll(ang);
    ang.z = roll;
#else
    ang = AnglesTransform_Normalize(ang, false);
#endif
    return ang;
}
 
// FIXME: the nearest bounding box point can be unreachable via trace,
// despite there actually being line of sight if only the trace was adjusted slightly
#define WarpZoneLib_NearestPointOnBox(mi, ma, org) NearestPointOnBoundingBox(mi, ma, org)
 
.int WarpZone_findradius_hit;
const int WarpZone_FindRadius_Hit_UNSEEN  = 0;
const int WarpZone_FindRadius_Hit_GOOD    = 1;
const int WarpZone_FindRadius_Hit_BAD     = 2;
bool WarpZoneLib_BadEntity(entity e, WarpZone_FindRadius_cond_callback_t cb)
{
    if (e.WarpZone_findradius_hit != WarpZone_FindRadius_Hit_UNSEEN) // also account for caching
        return (e.WarpZone_findradius_hit == WarpZone_FindRadius_Hit_BAD); // either BAD or GOOD
    if (is_pure(e))
        return true;
 
    string s = e.classname;
    switch (s)
    {
        case "warpzone_refsys": // ignore, especially: do not overwrite the refsys parameters
        case "weaponentity":
        case "exteriorweaponentity":
        case "sprite_waypoint":
        case "waypoint":
        case "spawnfunc":
        case "weaponchild":
        case "chatbubbleentity":
        case "buff_model":
        //case "net_linked": // actually some real entities are linked without classname, fail
        case "":
            return true;
    }
    if (startsWith(s, "target_"))
        return true;
    if (startsWith(s, "info_"))
        return true;
 
    return (cb && !cb(e));
}
 
.entity enemy;
entity _WarpZone_FindRadius_goodents_first;
entity _WarpZone_FindRadius_badents_first;
float _WarpZone_FindRadius_nomonsters;
var WarpZone_FindRadius_cond_callback_t _WarpZone_FindRadius_cond_cb;
.entity WarpZone_findradius_next;
void _WarpZone_FindRadius_Recurse(
    vector org,
    float rad,
    vector org0,
    vector transform,
    vector shift)
{
    if (rad <= 0)
        return;
    entity wz = NULL;
    FOREACH_ENTITY_RADIUS(org, rad, it.WarpZone_findradius_hit != WarpZone_FindRadius_Hit_BAD, // exclude entities we already know are bad
    {
        bool is_warpzone = (it.classname == "trigger_warpzone");
        if (!is_warpzone // warpzones are never bad entities
        && WarpZoneLib_BadEntity(it, _WarpZone_FindRadius_cond_cb))
        {
            it.WarpZone_findradius_hit = WarpZone_FindRadius_Hit_BAD;
            it.WarpZone_findradius_next = _WarpZone_FindRadius_badents_first;
            // use .WarpZone_findradius_next so that .chain isn't changed on entities not included in the returned list_first
            _WarpZone_FindRadius_badents_first = it;
            continue;
        }
 
        vector p = WarpZoneLib_NearestPointOnBox(it.origin + it.mins, it.origin + it.maxs, org0);
        if (it.WarpZone_findradius_hit == WarpZone_FindRadius_Hit_GOOD && vlen2(it.WarpZone_findradius_dist) <= vlen2(org0 - p))
            continue;
        if (_WarpZone_FindRadius_nomonsters != MOVE_NOTHING)
        {
            traceline(org, p, _WarpZone_FindRadius_nomonsters, it);
            if (trace_fraction < 1)
                continue;
        }
 
        it.WarpZone_findradius_nearest = p;
        it.WarpZone_findradius_dist = org0 - p;
        //it.WarpZone_findradius_findorigin = org;
        //it.WarpZone_findradius_findradius = rad;
        if (is_warpzone)
        {
            it.WarpZone_findradius_next = wz;
            wz = it;
            it.WarpZone_findradius_hit = WarpZone_FindRadius_Hit_GOOD;
            it.enemy.WarpZone_findradius_dist = '0 0 0'; // we don't want to go through this zone ever again
            it.enemy.WarpZone_findradius_hit = WarpZone_FindRadius_Hit_GOOD;
        }
        else // entity we'll include in the list
        {
            it.warpzone_transform = transform;
            it.warpzone_shift = shift;
            if (it.WarpZone_findradius_hit != WarpZone_FindRadius_Hit_GOOD) // add to good ents chain if not already in it
            {
                it.chain = _WarpZone_FindRadius_goodents_first; // fine to use .chain since FOREACH_ENTITY_RADIUS doesn't use it
                _WarpZone_FindRadius_goodents_first = it;
                it.WarpZone_findradius_hit = WarpZone_FindRadius_Hit_GOOD;
            }
        }
    });
    for (entity e = wz; e; e = e.WarpZone_findradius_next)
    {
        vector org0_new = WarpZone_TransformOrigin(e, org);
        traceline(e.warpzone_targetorigin, org0_new, MOVE_NOMONSTERS, e);
        vector org_new = trace_endpos;
 
        _WarpZone_FindRadius_Recurse(
            org_new,
            rad - max(8, vlen(org_new - org0_new)),
            org0_new,
            AnglesTransform_Multiply(e.warpzone_transform, transform), // new transform
            AnglesTransform_Multiply_GetPostShift(e.warpzone_transform, e.warpzone_shift, transform, shift)); // new shift
        e.WarpZone_findradius_hit = e.enemy.WarpZone_findradius_hit = WarpZone_FindRadius_Hit_UNSEEN;
    }
}
entity WarpZone_SearchInRadius(vector org, float rad, float nomonsters, WarpZone_FindRadius_cond_callback_t cb)
{
    bool nearby_warpzones = false;
    // use FOREACH_ENTITY_RADIUS if no warpzone is touching the box of side 2 * rad and center org
    // which includes the sphere of radius rad and center org
    if (warpzone_warpzones_exist)
    {
        vector boxmin = vec3(org.x - rad, org.y - rad, org.z - rad);
        vector boxmax = vec3(org.x + rad, org.y + rad, org.z + rad);
        IL_EACH(g_warpzones, boxesoverlap(it.absmin, it.absmax, boxmin, boxmax),
        {
            nearby_warpzones = true;
            break;
        });
    }
 
    _WarpZone_FindRadius_goodents_first = NULL;
    if (nearby_warpzones)
    {
        _WarpZone_FindRadius_badents_first = NULL;
        _WarpZone_FindRadius_nomonsters = nomonsters;
        _WarpZone_FindRadius_cond_cb = cb;
        _WarpZone_FindRadius_Recurse(org, rad, org, '0 0 0', '0 0 0');
        FOREACH_LIST(_WarpZone_FindRadius_goodents, chain,                    true, it.WarpZone_findradius_hit = WarpZone_FindRadius_Hit_UNSEEN);
        FOREACH_LIST(_WarpZone_FindRadius_badents,  WarpZone_findradius_next, true, it.WarpZone_findradius_hit = WarpZone_FindRadius_Hit_UNSEEN);
    }
    else // cheaper than _WarpZone_FindRadius_Recurse
        FOREACH_ENTITY_RADIUS(org, rad, !WarpZoneLib_BadEntity(it, cb),
        {
            vector p = NearestPointOnBoundingBox(it.origin + it.mins, it.origin + it.maxs, org);
            if (nomonsters != MOVE_NOTHING)
            {
                traceline(org, p, nomonsters, it);
                if (trace_fraction < 1)
                    continue;
            }
 
            it.chain = _WarpZone_FindRadius_goodents_first; // fine to use .chain since FOREACH_ENTITY_RADIUS doesn't use it
            _WarpZone_FindRadius_goodents_first = it;
            it.WarpZone_findradius_nearest = p;
            it.WarpZone_findradius_dist = org - p;
            WarpZone_Accumulator_Clear(it); // reset .warpzone_transform and .warpzone_shift
        });
 
    return _WarpZone_FindRadius_goodents_first;
}
 
.entity WarpZone_refsys;
// called when an entity is deleted with delete() / remove()
// or when a player disconnects
ACCUMULATE
void ONREMOVE(entity this)
{
    // remove WarpZone_refsys object attached to 'this'
    if (this.WarpZone_refsys && this.WarpZone_refsys.owner == this)
        delete(this.WarpZone_refsys);
}
void WarpZone_RefSys_CheckCreate(entity me)
{
    if (me.WarpZone_refsys.owner == me)
        return;
    me.WarpZone_refsys = new(warpzone_refsys);
    me.WarpZone_refsys.owner = me;
    WarpZone_Accumulator_Clear(me.WarpZone_refsys);
}
void WarpZone_RefSys_Clear(entity me)
{
    if (!me.WarpZone_refsys)
        return;
    delete(me.WarpZone_refsys);
    me.WarpZone_refsys = NULL;
}
void WarpZone_RefSys_AddTransform(entity me, vector t, vector s)
{
    if (t == '0 0 0' && s == '0 0 0')
        return;
    WarpZone_RefSys_CheckCreate(me);
    WarpZone_Accumulator_AddTransform(me.WarpZone_refsys, t, s);
}
void WarpZone_RefSys_AddInverseTransform(entity me, vector t, vector s)
{
    if (t == '0 0 0' && s == '0 0 0')
        return;
    WarpZone_RefSys_CheckCreate(me);
    WarpZone_Accumulator_AddInverseTransform(me.WarpZone_refsys, t, s);
}
.vector WarpZone_refsys_incremental_shift;
.vector WarpZone_refsys_incremental_transform;
void WarpZone_RefSys_AddIncrementally(entity me, entity ref)
{
    //vector t, s;
    if (me.WarpZone_refsys_incremental_transform == ref.WarpZone_refsys.warpzone_transform
    &&  me.WarpZone_refsys_incremental_shift == ref.WarpZone_refsys.warpzone_shift)
        return;
    WarpZone_Accumulator_AddInverseTransform(me.WarpZone_refsys, me.WarpZone_refsys_incremental_transform, me.WarpZone_refsys_incremental_shift);
    WarpZone_Accumulator_Add(me.WarpZone_refsys, ref.WarpZone_refsys);
    me.WarpZone_refsys_incremental_shift = ref.WarpZone_refsys.warpzone_shift;
    me.WarpZone_refsys_incremental_transform = ref.WarpZone_refsys.warpzone_transform;
}
void WarpZone_RefSys_BeginAddingIncrementally(entity me, entity ref)
{
    me.WarpZone_refsys_incremental_shift = ref.WarpZone_refsys.warpzone_shift;
    me.WarpZone_refsys_incremental_transform = ref.WarpZone_refsys.warpzone_transform;
}

vector WarpZone_RefSys_TransformOrigin(entity from, entity to, vector org)
{
    if (from.WarpZone_refsys)
        org = WarpZone_UnTransformOrigin(from.WarpZone_refsys, org);
    if (to.WarpZone_refsys)
        org = WarpZone_TransformOrigin(to.WarpZone_refsys, org);
    return org;
}

vector WarpZone_RefSys_TransformVelocity(entity from, entity to, vector vel)
{
    if (from.WarpZone_refsys)
        vel = WarpZone_UnTransformVelocity(from.WarpZone_refsys, vel);
    if (to.WarpZone_refsys)
        vel = WarpZone_TransformVelocity(to.WarpZone_refsys, vel);
    return vel;
}

vector WarpZone_RefSys_TransformAngles(entity from, entity to, vector ang)
{
    if (from.WarpZone_refsys)
        ang = WarpZone_UnTransformAngles(from.WarpZone_refsys, ang);
    if (to.WarpZone_refsys)
        ang = WarpZone_TransformAngles(to.WarpZone_refsys, ang);
    return ang;
}

vector WarpZone_RefSys_TransformVAngles(entity from, entity to, vector ang)
{
    if (from.WarpZone_refsys)
        ang = WarpZone_UnTransformVAngles(from.WarpZone_refsys, ang);
    if (to.WarpZone_refsys)
        ang = WarpZone_TransformVAngles(to.WarpZone_refsys, ang);
    return ang;
}

void WarpZone_RefSys_Copy(entity me, entity from)
{
    if (from.WarpZone_refsys)
    {
        WarpZone_RefSys_CheckCreate(me);
        me.WarpZone_refsys.warpzone_shift = from.WarpZone_refsys.warpzone_shift;
        me.WarpZone_refsys.warpzone_transform = from.WarpZone_refsys.warpzone_transform;
    }
    else
        WarpZone_RefSys_Clear(me);
}

entity WarpZone_RefSys_SpawnSameRefSys(entity me)
{
    entity e = spawn();
    WarpZone_RefSys_Copy(e, me);
    return e;
}
 
bool WarpZoneLib_ExactTrigger_Touch(entity this, entity toucher, bool touchfunc)
{
    vector emin = toucher.absmin, emax = toucher.absmax;
    if (!Q3COMPAT_COMMON)
    {
        // Xonotic and Nexuiz maps assume triggers will be activated by adjacent players
        // prior to sv_legacy_bbox_expand 0 DP always did this for SVQC and never for CSQC
        emin -= '1 1 1';
        emax += '1 1 1';
    }
 
    // if called from a touch func, we can assume the boxes do overlap
    if (!touchfunc && !boxesoverlap(emin, emax, this.absmin, this.absmax)) // quick
        return false;
 
    return WarpZoneLib_BoxTouchesBrush(emin, emax, this, toucher); // accurate
}
 
 
void WarpZoneLib_MoveOutOfSolid_Expand(entity e, vector by)
{
    const float eps = 1/16; // 0.0625
    tracebox(e.origin, e.mins - '1 1 1' * eps, e.maxs + '1 1 1' * eps, e.origin + by, MOVE_WORLDONLY, e);
    if (trace_startsolid)
        return;
    if (trace_fraction < 1)
        // hit something, adjust origin in the other direction...
        setorigin(e, e.origin - by * (1 - trace_fraction));
}
 
int WarpZoneLib_MoveOutOfSolid(entity e)
{
    vector o = e.origin;
    traceline(o, o, MOVE_WORLDONLY, e);
    if (trace_startsolid)
        return 0; // too stuck, giving up
 
    tracebox(o, e.mins, e.maxs, o, MOVE_WORLDONLY, e);
    if (!trace_startsolid)
        return -1; // wasn't stuck
 
    vector m0 = e.mins;
    vector m1 = e.maxs;
    e.mins = '0 0 0';
    e.maxs = '0 0 0';
    WarpZoneLib_MoveOutOfSolid_Expand(e, eX * m0.x);  e.mins.x = m0.x;
    WarpZoneLib_MoveOutOfSolid_Expand(e, eX * m1.x);  e.maxs.x = m1.x;
    WarpZoneLib_MoveOutOfSolid_Expand(e, eY * m0.y);  e.mins.y = m0.y;
    WarpZoneLib_MoveOutOfSolid_Expand(e, eY * m1.y);  e.maxs.y = m1.y;
    WarpZoneLib_MoveOutOfSolid_Expand(e, eZ * m0.z);  e.mins.z = m0.z;
    WarpZoneLib_MoveOutOfSolid_Expand(e, eZ * m1.z);  e.maxs.z = m1.z;
    setorigin(e, e.origin);
 
    tracebox(e.origin, e.mins, e.maxs, e.origin, MOVE_WORLDONLY, e);
    if (trace_startsolid)
    {
        setorigin(e, o);
        return 0; // can't fix
    }
 
    return 1; // was stuck but is fixed now
}