ladder.qc

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#include "ladder.qh"
REGISTER_NET_LINKED(ENT_CLIENT_LADDER)

void func_ladder_think(entity this)
{
#ifdef CSQC
    // TODO: check if this is what is causing the glitchiness when switching between them
    float dt = time - this.move_time;
    this.move_time = time;
    if(dt <= 0) { return; }
#endif

    // set myself as current ladders where possible
    IL_EACH(g_ladderents, it.ladder_entity == this,
    {
        it.ladder_entity = NULL;
        IL_REMOVE(g_ladderents, it);
    });

    FOREACH_ENTITY_RADIUS((this.absmin + this.absmax) * 0.5, vlen(this.absmax - this.absmin) * 0.5 + 1, !it.ladder_entity && IS_PLAYER(it) && it.move_movetype != MOVETYPE_NOCLIP && !IS_DEAD(it),
    {
        vector emin = it.absmin;
        vector emax = it.absmax;
        if(this.solid == SOLID_BSP || (IS_CSQC && this.solid == SOLID_TRIGGER)) // CSQC doesn't expand properly
        {
            emin -= '1 1 1';
            emax += '1 1 1';
        }
        if(boxesoverlap(emin, emax, this.absmin, this.absmax)) // quick
        {
            if(WarpZoneLib_BoxTouchesBrush(emin, emax, this, it)) // accurate
            {
                if(!it.ladder_entity)
                    IL_PUSH(g_ladderents, it);
                it.ladder_entity = this;
            }
        }
    });

#ifdef SVQC
    this.nextthink = time;
#endif
}

#ifdef SVQC
bool func_ladder_send(entity this, entity to, int sf)
{
    WriteHeader(MSG_ENTITY, ENT_CLIENT_LADDER);

    WriteString(MSG_ENTITY, this.classname);
    WriteByte(MSG_ENTITY, this.skin);
    WriteCoord(MSG_ENTITY, this.speed);

    trigger_common_write(this, false);

    return true;
}

void func_ladder_link(entity this)
{
    trigger_link(this, func_ladder_send);
    //this.model = "null";
}

void func_ladder_init(entity this)
{
    trigger_init(this);
    func_ladder_link(this);
    setthink(this, func_ladder_think);
    this.nextthink = time;

    if(min(this.absmax.x - this.absmin.x, this.absmax.y - this.absmin.y) > 100)
        return;

    entity tracetest_ent = spawn();
    setsize(tracetest_ent, PL_MIN_CONST, PL_MAX_CONST);
    tracetest_ent.dphitcontentsmask = DPCONTENTS_SOLID | DPCONTENTS_BODY | DPCONTENTS_PLAYERCLIP | DPCONTENTS_BOTCLIP;

    vector top_min = (this.absmin + this.absmax) / 2;
    top_min.z = this.absmax.z;
    vector top_max = top_min;
    top_max.z += PL_MAX_CONST.z - PL_MIN_CONST.z;
    tracebox(top_max + jumpstepheightvec, PL_MIN_CONST, PL_MAX_CONST, top_min, MOVE_NOMONSTERS, tracetest_ent);
    if(trace_startsolid)
    {
        tracebox(top_max + stepheightvec, PL_MIN_CONST, PL_MAX_CONST, top_min, MOVE_NOMONSTERS, tracetest_ent);
        if(trace_startsolid)
        {
            tracebox(top_max, PL_MIN_CONST, PL_MAX_CONST, top_min, MOVE_NOMONSTERS, tracetest_ent);
            if(trace_startsolid)
            {
                if(this.absmax.x - this.absmin.x > PL_MAX_CONST.x - PL_MIN_CONST.x
                    && this.absmax.y - this.absmin.y < this.absmax.x - this.absmin.x)
                {
                    // move top on one side
                    top_max.y = top_min.y = this.absmin.y + (PL_MAX_CONST.y - PL_MIN_CONST.y) * 0.75;
                }
                else if(this.absmax.y - this.absmin.y > PL_MAX_CONST.y - PL_MIN_CONST.y
                    && this.absmax.x - this.absmin.x < this.absmax.y - this.absmin.y)
                {
                    // move top on one side
                    top_max.x = top_min.x = this.absmin.x + (PL_MAX_CONST.x - PL_MIN_CONST.x) * 0.75;
                }
                tracebox(top_max, PL_MIN_CONST, PL_MAX_CONST, top_min, MOVE_NOMONSTERS, tracetest_ent);
                if(trace_startsolid)
                {
                    if(this.absmax.x - this.absmin.x > PL_MAX_CONST.x - PL_MIN_CONST.x
                        && this.absmax.y - this.absmin.y < this.absmax.x - this.absmin.x)
                    {
                        // alternatively on the other side
                        top_max.y = top_min.y = this.absmax.y - (PL_MAX_CONST.y - PL_MIN_CONST.y) * 0.75;
                    }
                    else if(this.absmax.y - this.absmin.y > PL_MAX_CONST.y - PL_MIN_CONST.y
                        && this.absmax.x - this.absmin.x < this.absmax.y - this.absmin.y)
                    {
                        // alternatively on the other side
                        top_max.x = top_min.x = this.absmax.x - (PL_MAX_CONST.x - PL_MIN_CONST.x) * 0.75;
                    }
                    tracebox(top_max, PL_MIN_CONST, PL_MAX_CONST, top_min, MOVE_NOMONSTERS, tracetest_ent);
                }
            }
        }
    }
    delete(tracetest_ent);
    if(trace_startsolid || trace_endpos.z < this.absmax.z)
    {
        return;
    }

    this.bot_pickup = true; // allow bots to make use of this ladder
    float cost = waypoint_getlinearcost(trace_endpos.z - this.absmin.z);
    top_min = trace_endpos;
    waypoint_spawnforteleporter_boxes(this, WAYPOINTFLAG_LADDER, this.absmin, this.absmax, top_min, top_min, cost);
}

spawnfunc(func_ladder)
{
    IL_PUSH(g_ladders, this); // TODO: also func_water? bots currently loop through func_ladder only

    func_ladder_init(this);
}

spawnfunc(func_water)
{
    func_ladder_init(this);
}

#elif defined(CSQC)
.float speed;

void func_ladder_draw(entity this) { func_ladder_think(this); }

void func_ladder_remove(entity this)
{
    IL_EACH(g_ladderents, it.ladder_entity == this,
    {
        it.ladder_entity = NULL;
        IL_REMOVE(g_ladderents, it);
    });
    strfree(this.classname);
}

NET_HANDLE(ENT_CLIENT_LADDER, bool isnew)
{
    this.classname = strzone(ReadString());
    this.skin = ReadByte();
    this.speed = ReadCoord();
    this.solid = SOLID_TRIGGER;

    trigger_common_read(this, false);

    if(isnew)
        IL_PUSH(g_drawables, this);
    this.draw = func_ladder_draw;
    this.drawmask = MASK_NORMAL;

    this.move_time = time;
    this.entremove = func_ladder_remove;

    // NOTE: CSQC's version of setorigin doesn't expand
    this.absmin -= '1 1 1';
    this.absmax += '1 1 1';

    return true;
}
#endif