jumppads.qc

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#include "jumppads.qh"
// TODO: split target_push and put it in the target folder
#ifdef SVQC
#include <common/physics/movetypes/movetypes.qh>
 
void trigger_push_use(entity this, entity actor, entity trigger)
{
    if(teamplay)
    {
        this.team = actor.team;
        this.SendFlags |= SF_TRIGGER_UPDATE;
    }
}
#endif
 
REGISTER_NET_LINKED(ENT_CLIENT_TRIGGER_PUSH)
REGISTER_NET_LINKED(ENT_CLIENT_TRIGGER_PUSH_VELOCITY)
REGISTER_NET_LINKED(ENT_CLIENT_TARGET_PUSH)
 
/*
    trigger_push_calculatevelocity
 
    Arguments:
      org - origin of the object which is to be pushed
      tgt - target entity (can be either a point or a model entity; if it is
            the latter, its midpoint is used)
      ht  - jump height, measured from the higher one of org and tgt's midpoint
      pushed_entity - object that is to be pushed
 
    Returns: velocity for the jump
 */
vector trigger_push_calculatevelocity(vector org, entity tgt, float ht, entity pushed_entity)
{
    float grav, sdist, zdist, vs, vz, jumpheight;
    vector sdir, torg;
 
    torg = tgt.origin + (tgt.mins + tgt.maxs) * 0.5;
 
    grav = PHYS_GRAVITY(pushed_entity);
    if(pushed_entity && pushed_entity.gravity)
        grav *= pushed_entity.gravity;
 
    // Q3 has frametime-dependent gravity, but its trigger_push velocity calculation doesn't account for that.
    // This discrepancy can be simulated accurately which ensures that all entities will arrive
    // where they would in Q3 with gravity 800 at 125fps, even if entity-specific gravity is applied.
    // This can be hard-coded because we don't support the Q3 world.gravity field at this time.
    // See physicsCPMA.cfg for maths and test results.
    if (Q3COMPAT_COMMON)
        grav /= 750/800; // exact float, unlike 800/750
 
    zdist = torg.z - org.z;
    sdist = vlen(torg - org - zdist * '0 0 1');
    sdir = normalize(torg - org - zdist * '0 0 1');
 
    // how high do we need to push the player?
    jumpheight = fabs(ht);
    if(zdist > 0)
        jumpheight += zdist;
 
    /*
        STOP.
 
        You will not understand the following equations anyway...
        But here is what I did to get them.
 
        I used the functions
 
          s(t) = t * vs
          z(t) = t * vz - 1/2 grav t^2
 
        and solved for:
 
          s(ti) = sdist
          z(ti) = zdist
          max(z, ti) = jumpheight
 
        From these three equations, you will find the three parameters vs, vz
        and ti.
     */
 
    // push them so high...
    vz = sqrt(fabs(2 * grav * jumpheight)); // NOTE: sqrt(positive)!
 
    // we start with downwards velocity only if it's a downjump and the jump apex should be outside the jump!
    if(ht < 0)
        if(zdist < 0)
            vz = -vz;
 
    vector solution = solve_quadratic(0.5 * grav, -vz, zdist); // equation "z(ti) = zdist"
    // ALWAYS solvable because jumpheight >= zdist
    if(!solution.z)
        // just in case it is not solvable due to roundoff errors,
        // assume two equal solutions at their center (this is mainly for the usual case with ht == 0)
        solution_y = solution.x;
    if(zdist == 0)
        // solution_x is 0 in this case, so don't use it,
        // but rather use solution_y (which will be sqrt(0.5 * jumpheight / grav), actually)
        solution_x = solution.y;
 
    float flighttime;
    if(zdist < 0)
    {
        // down-jump
        if(ht < 0)
        {
            // almost straight line type
            // jump apex is before the jump
            // we must take the larger one
            flighttime = solution.y;
        }
        else
        {
            // regular jump
            // jump apex is during the jump
            // we must take the larger one too
            flighttime = solution.y;
        }
    }
    else
    {
        // up-jump
        if(ht < 0)
        {
            // almost straight line type
            // jump apex is after the jump
            // we must take the smaller one
            flighttime = solution.x;
        }
        else
        {
            // regular jump
            // jump apex is during the jump
            // we must take the larger one
            flighttime = solution.y;
        }
    }
    vs = sdist / flighttime;
 
    // finally calculate the velocity
    return sdir * vs + '0 0 1' * vz;
}
 
vector trigger_push_velocity_calculatevelocity(entity this, vector org, entity tgt, float speed, float count, entity pushed_entity, bool already_pushed)
{
    bool is_playerdir_xy = boolean(this.spawnflags & PUSH_VELOCITY_PLAYERDIR_XY);
    bool is_add_xy = boolean(this.spawnflags & PUSH_VELOCITY_ADD_XY);
    bool is_playerdir_z = boolean(this.spawnflags & PUSH_VELOCITY_PLAYERDIR_Z);
    bool is_add_z = boolean(this.spawnflags & PUSH_VELOCITY_ADD_Z);
    bool is_bidirectional_xy = boolean(this.spawnflags & PUSH_VELOCITY_BIDIRECTIONAL_XY);
    bool is_bidirectional_z = boolean(this.spawnflags & PUSH_VELOCITY_BIDIRECTIONAL_Z);
    bool is_clamp_negative_adds = boolean(this.spawnflags & PUSH_VELOCITY_CLAMP_NEGATIVE_ADDS);
 
    vector sdir = normalize(vec2(pushed_entity.velocity));
    float zdir = pushed_entity.velocity.z;
    if(zdir != 0) zdir = copysign(1, zdir);
 
    vector vs_tgt = '0 0 0';
    float vz_tgt = 0;
    if (!is_playerdir_xy || !is_playerdir_z)
    {
        vector vel_tgt = trigger_push_calculatevelocity(org, tgt, 0, pushed_entity);
        vs_tgt = vec2(vel_tgt);
        vz_tgt = vel_tgt.z;
 
        // bidirectional jump pads do not play nicely with xonotic's jump pad targets
        if (is_bidirectional_xy)
        {
            if (normalize(vs_tgt) * sdir < 0)
            {
                vs_tgt *= -1;
            }
        }
 
        if (is_bidirectional_z)
        {
            if (signbit(vz_tgt) != signbit(zdir))
            {
                vz_tgt *= -1;
            }
        }
    }
 
    vector vs;
    if (is_playerdir_xy)
    {
        vs = sdir * speed;
    }
    else
    {
        vs = vs_tgt;
    }
 
    float vz;
    if (is_playerdir_z)
    {
        vz = zdir * count;
    }
    else
    {
        vz = vz_tgt;
    }
 
    if (is_add_xy)
    {
        vector vs_add = vec2(pushed_entity.velocity);
        if (already_pushed)
        {
            vs = vs_add;
        }
        else
        {
            vs += vs_add;
 
            if (is_clamp_negative_adds)
            {
                if ((normalize(vs) * sdir) < 0)
                {
                    vs = '0 0 0';
                }
            }
        }
    }
 
    if (is_add_z)
    {
        float vz_add = pushed_entity.velocity.z;
        if (already_pushed)
        {
            vz = vz_add;
        }
        else
        {
            vz += vz_add;
 
            if (is_clamp_negative_adds)
            {
                if (signbit(vz) != signbit(zdir))
                {
                    vz = 0;
                }
            }
        }
    }
 
    return vs + '0 0 1' * vz;
}
 
#ifdef SVQC
void trigger_push_velocity_think(entity this)
{
    bool found = false;
    IL_EACH(g_moveables, it.last_pushed == this,
    {
        if(!WarpZoneLib_ExactTrigger_Touch(this, it, false))
            it.last_pushed = NULL;
        else
            found = true;
    });
 
    if(found)
        this.nextthink = time;
    else
        setthink(this, func_null);
}
#endif
 
bool jumppad_push(entity this, entity targ, bool is_velocity_pad)
{
    if (!isPushable(targ))
        return false;
 
    vector org = targ.origin;
 
    if(Q3COMPAT_COMMON || (this.spawnflags & PUSH_STATIC))
        org = (this.absmin + this.absmax) * 0.5;
 
    bool already_pushed = false;
    if(is_velocity_pad) // remember velocity jump pads
    {
        if(this == targ.last_pushed || (targ.last_pushed && !STAT(Q3COMPAT, targ))) // if q3compat is active overwrite last stored jump pad, otherwise ignore
        {
            already_pushed = true;
        }
        else
        {
            targ.last_pushed = this; // may be briefly out of sync between client and server if client prediction is toggled
 
            #ifdef SVQC
            setthink(this, trigger_push_velocity_think);
            this.nextthink = time;
            #endif
        }
    }
 
    if(this.enemy)
    {
        if(!is_velocity_pad)
        {
            targ.velocity = trigger_push_calculatevelocity(org, this.enemy, this.height, targ);
        }
        else
        {
            targ.velocity = trigger_push_velocity_calculatevelocity(this, org, this.enemy, this.speed, this.count, targ, already_pushed);
        }
    }
    else if(this.target && this.target != "")
    {
        entity e;
        RandomSelection_Init();
        for(e = NULL; (e = find(e, targetname, this.target)); )
        {
            if(e.cnt)
                RandomSelection_AddEnt(e, e.cnt, 1);
            else
                RandomSelection_AddEnt(e, 1, 1);
        }
        if(!is_velocity_pad)
        {
            targ.velocity = trigger_push_calculatevelocity(org, RandomSelection_chosen_ent, this.height, targ);
        }
        else
        {
            targ.velocity = trigger_push_velocity_calculatevelocity(this, org, RandomSelection_chosen_ent, this.speed, this.count, targ, already_pushed);
        }
    }
    else
    {
        if(!is_velocity_pad)
        {
            targ.velocity = this.movedir;
        }
        else
        {
#ifdef SVQC
            objerror (this, "Jumppad with no target");
#endif
            return false;
        }
    }
 
    if(!is_velocity_pad) UNSET_ONGROUND(targ);
 
#ifdef CSQC
    if (targ.flags & FL_PROJECTILE)
    {
        targ.angles = vectoangles (targ.velocity);
        switch(targ.move_movetype)
        {
            case MOVETYPE_FLY:
                set_movetype(targ, MOVETYPE_TOSS);
                targ.gravity = 1;
                break;
            case MOVETYPE_BOUNCEMISSILE:
                set_movetype(targ, MOVETYPE_BOUNCE);
                targ.gravity = 1;
                break;
        }
    }
#endif
 
#ifdef SVQC
    if (IS_PLAYER(targ))
    {
        // reset tracking of oldvelocity for impact damage (sudden velocity changes)
        targ.oldvelocity = targ.velocity;
 
        // prevent sound spam when a player hits the jumppad more than once
        // or when a dead player gets stuck in the jumppad for some reason
        if(!already_pushed && this.pushltime < time && !(IS_DEAD(targ) && targ.velocity == '0 0 0'))
        {
            if (Q3COMPAT_COMMON && this.classname == "target_push")
                this.pushltime = time + 1.5;
            else
            {
                // flash when activated
                Send_Effect(EFFECT_JUMPPAD, targ.origin, targ.velocity, 1);
                this.pushltime = time + 0.2;
            }
            _sound (targ, CH_TRIGGER, this.noise, VOL_BASE, ATTEN_NORM);
        }
 
        if(IS_REAL_CLIENT(targ) || IS_BOT_CLIENT(targ))
        {
            bool found = false;
            for(int i = 0; i < targ.jumppadcount && i < NUM_JUMPPADSUSED; ++i)
                if(targ.(jumppadsused[i]) == this)
                    found = true;
            if(!found)
            {
                targ.(jumppadsused[targ.jumppadcount % NUM_JUMPPADSUSED]) = this;
                ++targ.jumppadcount;
            }
 
            if(IS_REAL_CLIENT(targ))
            {
                if(this.message)
                    centerprint(targ, this.message);
            }
            else
            {
                targ.lastteleporttime = time;
                targ.lastteleport_origin = targ.origin;
            }
 
            if (!IS_DEAD(targ))
                animdecide_setaction(targ, ANIMACTION_JUMP, true);
        }
        else
            targ.jumppadcount = 1;
 
        // reset tracking of who pushed you into a hazard (for kill credit)
        targ.pushltime = 0;
        targ.istypefrag = 0;
    }
 
    if(this.enemy.target)
        SUB_UseTargets(this.enemy, targ, this);
 
    if (targ.flags & FL_PROJECTILE)
    {
        targ.angles = vectoangles (targ.velocity);
        targ.com_phys_gravity_factor = 1;
        switch(targ.move_movetype)
        {
            case MOVETYPE_FLY:
                set_movetype(targ, MOVETYPE_TOSS);
                targ.gravity = 1;
                break;
            case MOVETYPE_BOUNCEMISSILE:
                set_movetype(targ, MOVETYPE_BOUNCE);
                targ.gravity = 1;
                break;
        }
        UpdateCSQCProjectile(targ);
    }
#endif
 
    return true;
}
 
void trigger_push_touch(entity this, entity toucher)
{
    if (this.active == ACTIVE_NOT)
        return;
 
    if(this.team)
        if(((this.spawnflags & INVERT_TEAMS) == 0) == (DIFF_TEAM(this, toucher)))
            return;
 
    EXACTTRIGGER_TOUCH(this, toucher);
 
    noref bool success = jumppad_push(this, toucher, false);
 
#ifdef SVQC
    if (success && (this.spawnflags & PUSH_ONCE))
    {
        settouch(this, func_null);
        setthink(this, SUB_Remove);
        this.nextthink = time;
    }
#endif
}
 
void trigger_push_velocity_touch(entity this, entity toucher)
{
    if (this.active == ACTIVE_NOT)
        return;
 
    if(this.team && DIFF_TEAM(this, toucher))
        return;
 
    EXACTTRIGGER_TOUCH(this, toucher);
 
    jumppad_push(this, toucher, true);
}
 
#ifdef SVQC
void trigger_push_link(entity this);
void trigger_push_updatelink(entity this);
bool trigger_push_testorigin(entity tracetest_ent, entity targ, entity jp, vector org)
{
    setorigin(tracetest_ent, org);
    tracetoss(tracetest_ent, tracetest_ent);
    if(trace_startsolid)
        return false;
 
    if (!jp.height)
    {
        // since tracetoss starting from jumppad's origin often fails when target
        // is very close to real destination, start it directly from target's
        // origin instead
        vector ofs = '0 0 0';
        if (vdist(vec2(tracetest_ent.velocity), <, autocvar_sv_maxspeed))
            ofs = stepheightvec;
 
        tracetest_ent.velocity.z = 0;
        setorigin(tracetest_ent, targ.origin + ofs);
        tracetoss(tracetest_ent, tracetest_ent);
        if (trace_startsolid && ofs.z)
        {
            setorigin(tracetest_ent, targ.origin + ofs * 0.5);
            tracetoss(tracetest_ent, tracetest_ent);
            if (trace_startsolid && ofs.z)
            {
                setorigin(tracetest_ent, targ.origin);
                tracetoss(tracetest_ent, tracetest_ent);
                if (trace_startsolid)
                    return false;
            }
        }
    }
    tracebox(trace_endpos, tracetest_ent.mins, tracetest_ent.maxs, trace_endpos - eZ * 1500, true, tracetest_ent);
    return true;
}
 
bool trigger_push_testorigin_for_item(entity tracetest_ent, entity item, vector org)
{
    setorigin(tracetest_ent, org);
    tracetoss(tracetest_ent, tracetest_ent);
 
    if(trace_startsolid)
        return false;
    if (trace_ent == item)
        return true;
 
    tracebox(trace_endpos, tracetest_ent.mins, tracetest_ent.maxs, trace_endpos - eZ * 1500, true, tracetest_ent);
 
    if (trace_ent == item)
        return true;
 
    return false;
}
#endif
 
#ifdef SVQC
// get the push entity in cases where a non-push entity acts as the trigger of a jump pad
entity get_pusher_from_trigger(entity this)
{
    // triggers could point to several pusher but each pusher would overwrite the effect of the previous one
    // this means only one pusher has to be considered
    // we still have to traverse the target list though since entities other than pushers could be in it
    entity pusher = NULL;
    if(this.classname != "trigger_push")
    {
        for(entity t = ftoe(maxclients); (t = find(t, targetname, this.target)); )
        {
            if(t.classname == "target_push")
            {
                pusher = t;
                break;
            }
        }
 
        if(!pusher) objerror (this, "Jump pad with non-existent target");
    }
 
    if(pusher)
        return pusher; // if the target field points to a target_push entity, return it
    else
        return this; // otherwise, return the original entity
}
 
vector trigger_push_get_start_point(entity this)
{
    // calculate a typical start point for the jump
    vector org = (this.absmin + this.absmax) * 0.5;
    org.z = this.absmax.z - PL_MIN_CONST.z - 7;
    return org;
}
 
float trigger_push_get_push_time(entity this, vector endpos)
{
    vector org = trigger_push_get_start_point(this);
    entity pusher = get_pusher_from_trigger(this); // function might get called from a non-push trigger entity
 
    float grav = PHYS_GRAVITY(NULL);
 
    entity t = pusher.enemy;
    if (t)
    {
        entity e = spawn();
        setsize(e, PL_MIN_CONST, PL_MAX_CONST);
        e.dphitcontentsmask = DPCONTENTS_SOLID | DPCONTENTS_BODY | DPCONTENTS_PLAYERCLIP | DPCONTENTS_BOTCLIP;
        vector v = trigger_push_calculatevelocity(org, t, pusher.height, e);
        vector v2 = trigger_push_calculatevelocity(endpos, t, pusher.height, e);
        delete(e);
        return (v.z + v2.z) / grav;
    }
    else if (!(pusher.target && pusher.target != ""))
    {
        if (!this.team)
        {
            vector v = pusher.movedir;
 
            float t = v.z / grav;
            float jump_height = 1/2 * grav * (t ** 2);
            float remaining_height = org.z + jump_height - endpos.z;
            float v2_z = sqrt(2 * grav * remaining_height);
 
            return (v.z + v2_z) / grav;
        }
    }
    return 0;
}
#endif
 
// if (item != NULL) returns true if the item can be reached by using this jumppad, false otherwise
// if (item == NULL) tests jumppad's trajectory and eventually spawns waypoints for it (return value doesn't matter)
// NOTE: for simplicity's sake it improperly tests jumppad bboxes instead of bmodels
bool trigger_push_test(entity this, entity item)
{
#ifdef SVQC
    vector org = trigger_push_get_start_point(this);
    entity pusher = get_pusher_from_trigger(this); // function might get called from a non-push trigger entity
#elif defined(CSQC)
    entity pusher = this; // client-side code never calls this on a non-push entity
#endif
 
    if (pusher.target)
    {
        int n = 0;
#ifdef SVQC
        vector vel = '0 0 0';
#endif
        for(entity t = NULL; (t = find(t, targetname, pusher.target)); )
        {
            ++n;
#ifdef SVQC
            if(t.move_movetype != MOVETYPE_NONE)
                continue;
 
            // bots can't tell teamed jumppads from normal ones
            if (this.team)
                continue;
 
            entity e = spawn();
            setsize(e, PL_MIN_CONST, PL_MAX_CONST);
            e.dphitcontentsmask = DPCONTENTS_SOLID | DPCONTENTS_BODY | DPCONTENTS_PLAYERCLIP | DPCONTENTS_BOTCLIP;
            e.velocity = trigger_push_calculatevelocity(org, t, pusher.height, e);
 
            vel = e.velocity;
            vector best_target = '0 0 0';
            vector best_org = '0 0 0';
            vector best_vel = '0 0 0';
            bool valid_best_target = false;
            if (item)
            {
                if (!trigger_push_testorigin_for_item(e, item, org))
                {
                    delete(e);
                    return false;
                }
            }
            else
            {
                // optimization: if horizontal velocity is 0 then target is not good since the trajectory
                // will definitely go back to the jumppad (horizontal velocity of best_vel can't be 0 anyway)
                if ((e.velocity.x != 0 || e.velocity.y != 0)
                    && trigger_push_testorigin(e, t, pusher, org))
                {
                    best_target = trace_endpos;
                    best_org = org;
                    best_vel = e.velocity;
                    valid_best_target = true;
                }
            }
 
            vector new_org;
            vector dist = t.origin - org;
            if (dist.x || dist.y) // if not perfectly vertical
            {
                // test trajectory with different starting points, sometimes the trajectory
                // starting from the jumppad origin can't reach the real destination
                // and destination waypoint ends up near the jumppad itself
                vector flatdir = normalize(dist - eZ * dist.z);
                vector ofs = flatdir * 0.5 * min(fabs(this.absmax.x - this.absmin.x), fabs(this.absmax.y - this.absmin.y));
                new_org = org + ofs;
 
                LABEL(new_test)
                e.velocity = trigger_push_calculatevelocity(new_org, t, pusher.height, e);
                if (item)
                {
                    if (!trigger_push_testorigin_for_item(e, item, new_org))
                    {
                        delete(e);
                        return false;
                    }
                }
                else
                {
                    vel = e.velocity;
                    if (vdist(vec2(e.velocity), <, autocvar_sv_maxspeed))
                        e.velocity = autocvar_sv_maxspeed * flatdir;
                    if (trigger_push_testorigin(e, t, pusher, new_org) && (!valid_best_target || trace_endpos.z > best_target.z + 50))
                    {
                        best_target = trace_endpos;
                        best_org = new_org;
                        best_vel = vel;
                        valid_best_target = true;
                    }
                }
                if (ofs && new_org != org - ofs)
                {
                    new_org = org - ofs;
                    goto new_test;
                }
            }
 
            if (item)
            {
                delete(e);
                return true;
            }
 
            if (valid_best_target)
            {
                if (!(boxesoverlap(this.absmin, this.absmax + eZ * 50, best_target + PL_MIN_CONST, best_target + PL_MAX_CONST)))
                {
                    float velxy = vlen(vec2(best_vel));
                    float cost = vlen(vec2(t.origin - best_org)) / velxy;
                    if(velxy < autocvar_sv_maxspeed)
                        velxy = autocvar_sv_maxspeed;
                    cost += vlen(vec2(best_target - t.origin)) / velxy;
                    waypoint_spawnforteleporter(this, best_target, cost, e);
                }
            }
            delete(e);
#endif
        }
 
        if(item)
            return false;
 
        if(!n)
        {
            // no dest!
#ifdef SVQC
            objerror (this, "Jumppad with nonexistant target");
#endif
            return false;
        }
        else if(n == 1)
        {
            // exactly one dest - bots love that
            if (!this.team)
                pusher.enemy = find(NULL, targetname, pusher.target);
            else // bots can't tell teamed jumppads from normal ones
                pusher.enemy = NULL;
        }
        else
        {
            // have to use random selection every single time
            pusher.enemy = NULL;
        }
 
    }
#ifdef SVQC
    else
    {
        if (!this.team)
        {
            entity e = spawn();
            setsize(e, PL_MIN_CONST, PL_MAX_CONST);
            e.dphitcontentsmask = DPCONTENTS_SOLID | DPCONTENTS_BODY | DPCONTENTS_PLAYERCLIP | DPCONTENTS_BOTCLIP;
            setorigin(e, org);
            e.velocity = pusher.movedir;
            tracetoss(e, e);
            if (item)
            {
                bool r = (trace_ent == item);
                delete(e);
                return r;
            }
            if (!(boxesoverlap(this.absmin, this.absmax + eZ * 50, trace_endpos + PL_MIN_CONST, trace_endpos + PL_MAX_CONST)))
                waypoint_spawnforteleporter(this, trace_endpos, sqrt(vlen2(trace_endpos - org) / vlen2(e.velocity)), e);
            delete(e);
        }
        else if (item)
            return false;
    }
 
    defer(pusher, 0.1, trigger_push_updatelink);
#endif
    return true;
}
 
void trigger_push_findtarget(entity this)
{
    trigger_push_test(this, NULL);
}
 
#ifdef SVQC
float trigger_push_send(entity this, entity to, float sf)
{
    WriteHeader(MSG_ENTITY, ENT_CLIENT_TRIGGER_PUSH);
 
    WriteByte(MSG_ENTITY, this.team);
    WriteInt24_t(MSG_ENTITY, this.spawnflags);
    WriteByte(MSG_ENTITY, this.active);
    WriteCoord(MSG_ENTITY, this.height);
 
    trigger_common_write(this, true);
 
    return true;
}
 
float trigger_push_velocity_send(entity this, entity to, float sf)
{
    WriteHeader(MSG_ENTITY, ENT_CLIENT_TRIGGER_PUSH_VELOCITY);
 
    WriteByte(MSG_ENTITY, this.team);
    WriteInt24_t(MSG_ENTITY, this.spawnflags);
    WriteByte(MSG_ENTITY, this.active);
    WriteCoord(MSG_ENTITY, this.speed);
    WriteCoord(MSG_ENTITY, this.count);
 
    trigger_common_write(this, true);
 
    return true;
}
 
void trigger_push_updatelink(entity this)
{
    this.SendFlags |= SF_TRIGGER_INIT;
}
 
void trigger_push_link(entity this)
{
    trigger_link(this, trigger_push_send);
}
 
void trigger_push_velocity_link(entity this)
{
    trigger_link(this, trigger_push_velocity_send);
}
 
/*
 * ENTITY PARAMETERS:
 *
 *   target:  target of jump
 *   height:  the absolute value is the height of the highest point of the jump
 *            trajectory above the higher one of the player and the target.
 *            the sign indicates whether the highest point is INSIDE (positive)
 *            or OUTSIDE (negative) of the jump trajectory. General rule: use
 *            positive values for targets mounted on the floor, and use negative
 *            values to target a point on the ceiling.
 *   movedir: if target is not set, movedir * speed * 10 is the velocity to be reached.
 */
spawnfunc(trigger_push)
{
    SetMovedir(this);
 
    WarpZoneLib_ExactTrigger_Init(this, false);
    BITSET_ASSIGN(this.effects, EF_NODEPTHTEST);
    this.active = ACTIVE_ACTIVE;
    this.use = trigger_push_use;
    settouch(this, trigger_push_touch);
 
    // normal push setup
    if (!this.speed)
        this.speed = 1000;
    this.movedir *= this.speed * 10;
 
    if (!this.noise)
        this.noise = "misc/jumppad.wav";
    precache_sound (this.noise);
 
    trigger_push_link(this); // link it now
 
    IL_PUSH(g_jumppads, this);
 
    // this must be called to spawn the teleport waypoints for bots
    InitializeEntity(this, trigger_push_findtarget, INITPRIO_FINDTARGET);
}
 
/*
 * ENTITY PARAMETERS:
 *
 *   target:  this points to the target_position to which the player will jump.
 *   speed:   XY speed for player-directional velocity pads - either sets or adds to the player's horizontal velocity.
 *   count:   Z speed for player-directional velocity pads - either sets or adds to the player's vertical velocity.
 */
spawnfunc(trigger_push_velocity)
{
    WarpZoneLib_ExactTrigger_Init(this, false);
    BITSET_ASSIGN(this.effects, EF_NODEPTHTEST);
    this.active = ACTIVE_ACTIVE;
    this.use = trigger_push_use;
    settouch(this, trigger_push_velocity_touch);
 
    // normal push setup
    if (!this.noise)
        this.noise = "misc/jumppad.wav";
    precache_sound (this.noise);
 
    trigger_push_velocity_link(this); // link it now
}
 
 
bool target_push_send(entity this, entity to, float sf)
{
    WriteHeader(MSG_ENTITY, ENT_CLIENT_TARGET_PUSH);
 
    WriteByte(MSG_ENTITY, this.cnt);
    WriteString(MSG_ENTITY, this.targetname);
    WriteVector(MSG_ENTITY, this.origin);
 
    WriteAngleVector(MSG_ENTITY, this.angles);
 
    return true;
}
 
void target_push_use(entity this, entity actor, entity trigger)
{
    if(trigger.classname == "trigger_push" || trigger == this)
        return; // WTF, why is this a thing
 
    jumppad_push(this, actor, false);
}
 
void target_push_link(entity this)
{
    BITSET_ASSIGN(this.effects, EF_NODEPTHTEST);
    Net_LinkEntity(this, false, 0, target_push_send);
    //this.SendFlags |= 1; // update
}
 
void target_push_init(entity this)
{
    this.mangle = this.angles;
    setorigin(this, this.origin);
    target_push_link(this);
}
 
spawnfunc(target_push)
{
    target_push_init(this); // normal push target behaviour can be combined with a legacy pusher?
    this.use = target_push_use;
 
    if(this.target && this.target != "") // Q3 or old style Nexuiz pusher
    {
        for (entity trigger_ent = findchain(target, this.targetname); trigger_ent; trigger_ent = trigger_ent.chain)
        {
            // add the triggering entity to the g_jumppads list
            // multiple jump pads can use the same target_push
            if(!IL_CONTAINS(g_jumppads, trigger_ent))
            {
                IL_PUSH(g_jumppads, trigger_ent);
                InitializeEntity(trigger_ent, trigger_push_findtarget, INITPRIO_FINDTARGET);
            }
        }
    }
    else // Q3 .angles and .speed pusher
    {
        if (!this.speed)
            this.speed = 1000;
        SetMovedir(this); // this clears .angles so it must be after target_push_init()
        this.movedir *= this.speed;
    }
 
    if (!this.noise)
    {
        if (Q3COMPAT_COMMON && !(this.spawnflags & Q3_TARGET_PUSH_JUMPPAD))
            this.noise = "sound/misc/windfly.wav"; // Q3 mappers provide this, it's not in pak0
        else
            this.noise = "misc/jumppad.wav";
    }
    precache_sound (this.noise);
}
 
spawnfunc(info_notnull)
{
    target_push_init(this);
}
spawnfunc(target_position)
{
    target_push_init(this);
}
 
#elif defined(CSQC)
 
NET_HANDLE(ENT_CLIENT_TRIGGER_PUSH, bool isnew)
{
    int mytm = ReadByte(); if(mytm) { this.team = mytm - 1; }
    this.spawnflags = ReadInt24_t();
    this.active = ReadByte();
    this.height = ReadCoord();
 
    trigger_common_read(this, true);
 
    this.entremove = trigger_remove_generic;
    this.solid = SOLID_TRIGGER;
    settouch(this, trigger_push_touch);
    this.move_time = time;
    defer(this, 0.25, trigger_push_findtarget);
 
    return true;
}
 
NET_HANDLE(ENT_CLIENT_TRIGGER_PUSH_VELOCITY, bool isnew)
{
    int mytm = ReadByte(); if(mytm) { this.team = mytm - 1; }
    this.spawnflags = ReadInt24_t();
    this.active = ReadByte();
    this.speed = ReadCoord();
    this.count = ReadCoord();
 
    trigger_common_read(this, true);
 
    this.entremove = trigger_remove_generic;
    this.solid = SOLID_TRIGGER;
    settouch(this, trigger_push_velocity_touch);
    this.move_time = time;
 
    return true;
}
 
void target_push_remove(entity this)
{
    // strfree(this.classname);
    strfree(this.targetname);
}
 
NET_HANDLE(ENT_CLIENT_TARGET_PUSH, bool isnew)
{
    this.cnt = ReadByte();
    this.targetname = strzone(ReadString());
    this.origin = ReadVector();
 
    this.angles = ReadAngleVector();
 
    return = true;
 
    setorigin(this, this.origin);
 
    this.drawmask = MASK_NORMAL;
    this.entremove = target_push_remove;
}
#endif