aim.qc

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#include "aim.qh"
 
#include <common/physics/player.qh>
#include <common/state.qh>
#include <common/stats.qh>
#include <common/weapons/_all.qh>
#include <server/bot/default/bot.qh>
#include <server/bot/default/cvars.qh>
#include <server/mutators/_mod.qh>
#include <server/weapons/weaponsystem.qh>
 
// traces multiple trajectories to find one that will impact the target
// 'end' vector is the place it aims for,
// returns true only if it hit targ (don't target non-solid entities)
 
float findtrajectorywithleading(vector org, vector m1, vector m2, entity targ, float shotspeed, float shotspeedupward, float maxtime, float shotdelay, entity ignore)
{
    float c, savesolid, shottime;
    vector dir, end, v, o;
    if (shotspeed < 1)
        return false; // could cause division by zero if calculated
    if (targ.solid < SOLID_BBOX) // SOLID_NOT and SOLID_TRIGGER
        return false; // could never hit it
    if (!tracetossent)
        tracetossent = new(tracetossent);
    tracetossent.owner = ignore;
    setsize(tracetossent, m1, m2);
    savesolid = targ.solid;
    targ.solid = SOLID_NOT;
    o = (targ.absmin + targ.absmax) * 0.5;
    shottime = ((vlen(o - org) / shotspeed) + shotdelay);
    v = targ.velocity * shottime + o;
    tracebox(o, targ.mins, targ.maxs, v, false, targ);
    v = trace_endpos;
    end = v + (targ.mins + targ.maxs) * 0.5;
    float shotdistance = max(0.001, vlen(end - org));
    if ((shotdistance / shotspeed + 0.2) > maxtime)
    {
        // out of range
        targ.solid = savesolid;
        return false;
    }
 
    if (!tracetossfaketarget)
        tracetossfaketarget = new(tracetossfaketarget);
    tracetossfaketarget.solid = savesolid;
    set_movetype(tracetossfaketarget, targ.move_movetype);
    _setmodel(tracetossfaketarget, targ.model); // no low precision
    tracetossfaketarget.model = targ.model;
    tracetossfaketarget.modelindex = targ.modelindex;
    setsize(tracetossfaketarget, targ.mins, targ.maxs);
    setorigin(tracetossfaketarget, v);
 
    c = 0;
    // TODO: Consider changing this back to `/ shotdistance` after https://github.com/graphitemaster/gmqcc/issues/210.
    dir = (end - org) * (1 / shotdistance); // same as dir = normalize(end - org); but cheaper
    vector test_dir = dir;
    vector test_dir_normalized = dir;
    while (c < 10) // 10 traces
    {
        setorigin(tracetossent, org); // reset
        tracetossent.velocity = findtrajectory_velocity = test_dir_normalized * shotspeed + shotspeedupward * '0 0 1';
        tracetoss(tracetossent, ignore); // love builtin functions...
        if (trace_ent == tracetossfaketarget) // done
        {
            targ.solid = savesolid;
 
            // make it disappear
            tracetossfaketarget.solid = SOLID_NOT;
            set_movetype(tracetossfaketarget, MOVETYPE_NONE);
            tracetossfaketarget.model = "";
            tracetossfaketarget.modelindex = 0;
            // relink to remove it from physics considerations
            setorigin(tracetossfaketarget, v);
 
            return true;
        }
        test_dir.z += 0.1; // aim up a little more
        test_dir_normalized = normalize(test_dir);
        c = c + 1;
    }
    targ.solid = savesolid;
 
    // make it disappear
    tracetossfaketarget.solid = SOLID_NOT;
    set_movetype(tracetossfaketarget, MOVETYPE_NONE);
    tracetossfaketarget.model = "";
    tracetossfaketarget.modelindex = 0;
    // relink to remove it from physics considerations
    setorigin(tracetossfaketarget, v);
 
    // leave a valid one even if it won't reach
    findtrajectory_velocity = dir * shotspeed + shotspeedupward * '0 0 1';
    return false;
}
 
bool bot_shouldattack(entity this, entity targ)
{
    if (targ.team == this.team)
    {
        if (targ == this)
            return false;
        if (teamplay)
        if (targ.team != 0)
            return false;
    }
 
    if(teamplay)
    {
        if(targ.team==0)
            return false;
    }
    else if (autocvar_bot_ignore_bots && IS_BOT_CLIENT(targ))
        return false;
 
    if (!targ.takedamage)
        return false;
    if (IS_DEAD(targ))
        return false;
    if (PHYS_INPUT_BUTTON_CHAT(targ) && !autocvar_bot_typefrag)
        return false;
    if(targ.flags & FL_NOTARGET)
        return false;
    if(targ.alpha <= 0.1 && targ.alpha != 0)
        return false; // invisible via alpha
 
    if(MUTATOR_CALLHOOK(BotShouldAttack, this, targ))
        return false;
 
    return true;
}
 
// this function should be called after bot_aim so the aim is reset the next frame
void bot_aim_reset(entity this)
{
    this.bot_mouseaim = this.v_angle;
    this.bot_olddesiredang = this.v_angle;
    this.bot_aimdir_executed = true;
    this.bot_badaimtime = 0;
    this.bot_aimthinktime = time;
    this.bot_prevaimtime = time;
    this.bot_1st_order_aimfilter = '0 0 0';
    this.bot_2nd_order_aimfilter = '0 0 0';
    this.bot_3th_order_aimfilter = '0 0 0';
    this.bot_4th_order_aimfilter = '0 0 0';
    this.bot_5th_order_aimfilter = '0 0 0';
    this.bot_firetimer = 0;
}
 
void bot_aimdir(entity this, vector v, float maxfiredeviation)
{
    float dist, delta_t, blend;
    vector desiredang, diffang;
 
    this.bot_aimdir_executed = true;
 
    //dprint("aim ", this.netname, ": old:", vtos(this.v_angle));
    // make sure v_angle is sane first
    this.v_angle_y = this.v_angle.y - floor(this.v_angle.y / 360) * 360;
    this.v_angle_z = 0;
 
    // make work bot_aim_reset even if called before this function
    if (this.bot_prevaimtime == time)
        return;
 
    // if skill is high enough bots will not have any aim smoothing or aim errors
    if (SUPERBOT)
    {
        this.v_angle = vectoangles(normalize(v));
 
        this.v_angle.x *= -1;
 
        makevectors(this.v_angle);
        shotorg = this.origin + this.view_ofs;
        shotdir = v_forward;
 
        // bot will fire on the next tick
        this.bot_firetimer = time + 0.001;
        return;
    }
 
    // invalid aim dir (can happen when bot overlaps target)
    if(!v) return;
 
    float skill_save = skill;
    // allow turning in a more natural way when bot is walking
    if (!this.enemy)
        skill = max(4, skill);
 
    // get the desired angles to aim at
    //dprint(" at:", vtos(v));
    //v = normalize(v);
    //te_lightning2(NULL, this.origin + this.view_ofs, this.origin + this.view_ofs + v * 200);
    if (time >= this.bot_badaimtime)
    {
        this.bot_badaimtime = max(this.bot_badaimtime + 0.2 + 0.3 * random(), time);
        int f = bound(0, 1 - 0.1 * (skill + this.bot_offsetskill), 1);
        this.bot_badaimoffset = randomvec() * f * autocvar_bot_ai_aimskill_offset;
        this.bot_badaimoffset.x *= 0.7; // smaller vertical offset
    }
    float enemy_factor = ((this.enemy) ? 5 : 2);
    // apply enemy_factor every frame so that the bigger offset is applied instantly when the bot aims to a new target
    desiredang = vectoangles(v) + this.bot_badaimoffset * enemy_factor;
    //dprint(" desired:", vtos(desiredang));
    if (desiredang.x >= 180)
        desiredang.x = desiredang.x - 360;
    desiredang.x = bound(-90, 0 - desiredang.x, 90);
    desiredang.z = this.v_angle.z;
    //dprint(" / ", vtos(desiredang));

    //if (this.bot_painintensity)
    //{
    //  // shake from pain
    //  desiredang = desiredang + randomvec() * this.bot_painintensity * 0.2;
    //}
 
    // calculate turn angles
    diffang = (desiredang - this.bot_olddesiredang);
    // wrap yaw turn
    diffang.y = diffang.y - floor(diffang.y / 360) * 360;
    if (diffang.y >= 180)
        diffang.y = diffang.y - 360;
    this.bot_olddesiredang = desiredang;
    //dprint(" diff:", vtos(diffang));
 
    delta_t = time-this.bot_prevaimtime;
    this.bot_prevaimtime = time;
    // Here we will try to anticipate the comming aiming direction
    this.bot_1st_order_aimfilter= this.bot_1st_order_aimfilter
        + (diffang * (1 / delta_t)    - this.bot_1st_order_aimfilter) * bound(0, autocvar_bot_ai_aimskill_order_filter_1st,1);
    this.bot_2nd_order_aimfilter= this.bot_2nd_order_aimfilter
        + (this.bot_1st_order_aimfilter - this.bot_2nd_order_aimfilter) * bound(0, autocvar_bot_ai_aimskill_order_filter_2nd,1);
    this.bot_3th_order_aimfilter= this.bot_3th_order_aimfilter
        + (this.bot_2nd_order_aimfilter - this.bot_3th_order_aimfilter) * bound(0, autocvar_bot_ai_aimskill_order_filter_3th,1);
    this.bot_4th_order_aimfilter= this.bot_4th_order_aimfilter
        + (this.bot_3th_order_aimfilter - this.bot_4th_order_aimfilter) * bound(0, autocvar_bot_ai_aimskill_order_filter_4th,1);
    this.bot_5th_order_aimfilter= this.bot_5th_order_aimfilter
        + (this.bot_4th_order_aimfilter - this.bot_5th_order_aimfilter) * bound(0, autocvar_bot_ai_aimskill_order_filter_5th,1);
 
    //blend = (bound(0,skill,10)*0.1)*((1-bound(0,skill,10)*0.05) ** 2.5)*5.656854249; //Plot formule before changing !
    blend = bound(0,skill+this.bot_aimskill,10)*0.1;
    desiredang = desiredang + blend *
    (
          this.bot_1st_order_aimfilter * autocvar_bot_ai_aimskill_order_mix_1st
        + this.bot_2nd_order_aimfilter * autocvar_bot_ai_aimskill_order_mix_2nd
        + this.bot_3th_order_aimfilter * autocvar_bot_ai_aimskill_order_mix_3th
        + this.bot_4th_order_aimfilter * autocvar_bot_ai_aimskill_order_mix_4th
        + this.bot_5th_order_aimfilter * autocvar_bot_ai_aimskill_order_mix_5th
    );
    desiredang.x = bound(-90, desiredang.x, 90);
 
    // calculate turn angles
    diffang = desiredang - this.bot_mouseaim;
    // wrap yaw turn
    diffang.y = diffang.y - floor(diffang.y / 360) * 360;
    if (diffang.y >= 180)
        diffang.y = diffang.y - 360;
    //dprint(" diff:", vtos(diffang));
 
    if (time >= this.bot_aimthinktime)
    {
        this.bot_aimthinktime = max(this.bot_aimthinktime + 0.5 - 0.05*(skill+this.bot_thinkskill), time);
        this.bot_mouseaim = this.bot_mouseaim + diffang * (1-random()*0.1*bound(1,10-(skill+this.bot_thinkskill),10));
    }
 
    //this.v_angle = this.v_angle + diffang * bound(0, r * frametime * (skill * 0.5 + 2), 1);
 
    diffang = this.bot_mouseaim - desiredang;
    // wrap yaw turn
    diffang.y = diffang.y - floor(diffang.y / 360) * 360;
    if (diffang.y >= 180)
        diffang.y = diffang.y - 360;
    desiredang = desiredang + diffang * bound(0,autocvar_bot_ai_aimskill_think,1);
 
    // calculate turn angles
    diffang = desiredang - this.v_angle;
    // wrap yaw turn
    diffang.y = diffang.y - floor(diffang.y / 360) * 360;
    if (diffang.y >= 180)
        diffang.y = diffang.y - 360;
    //dprint(" diff:", vtos(diffang));
 
    // jitter tracking
    dist = vlen(diffang);
    //diffang = diffang + randomvec() * (dist * 0.05 * (3.5 - bound(0, skill, 3)));
 
    // turn
    float r, fixedrate, blendrate;
    fixedrate = autocvar_bot_ai_aimskill_fixedrate / bound(1,dist,1000);
    blendrate = autocvar_bot_ai_aimskill_blendrate;
    r = max(fixedrate, blendrate);
    //this.v_angle = this.v_angle + diffang * bound(frametime, r * frametime * (2+skill*skill*0.05-random()*0.05*(10-skill)), 1);
    r = bound(delta_t, r * delta_t * (2 + ((skill + this.bot_mouseskill) ** 3) * 0.005 - random()), 1);
    this.v_angle += diffang * (r + (1 - r) * bound(0, 1 - autocvar_bot_ai_aimskill_mouse, 1));
    this.v_angle_z = 0;
    this.v_angle_y = this.v_angle.y - floor(this.v_angle.y / 360) * 360;
    //dprint(" turn:", vtos(this.v_angle));
 
    skill = skill_save;
 
    if (maxfiredeviation <= 0)
        return;
 
    if (!autocvar_bot_ai_aimskill_firetolerance)
    {
        this.bot_firetimer = time + 0.2;
        return;
    }
 
    makevectors(this.v_angle);
    shotorg = this.origin + this.view_ofs;
    shotdir = v_forward;
 
    // decide whether to fire this time
    // v is the calculated trajectory, shotdir is bot view direction
    // NOTE: checking if (v * shotdir > cos(maxfiredeviation * DEG2RAD)) would be cheaper
    // but it gets evaluated to true even if v and shotdir have nearly opposite direction
    vector deviation = vectoangles(v) - vectoangles(shotdir);
    while (deviation.x < -180) deviation.x += 360; while (deviation.x > 180) deviation.x -= 360;
    while (deviation.y < -180) deviation.y += 360; while (deviation.y > 180) deviation.y -= 360;
    if (fabs(deviation.x) < maxfiredeviation && fabs(deviation.y) < maxfiredeviation)
    {
        traceline(shotorg, shotorg + shotdir * 1000, false, NULL);
        if (vdist(trace_endpos - shotorg, <, 500 + 500 * bound(0, skill + this.bot_aggresskill, 10))
            || random() * random() > bound(0, (skill + this.bot_aggresskill) * 0.05, 1))
        {
            this.bot_firetimer = time + bound(0.1, 0.5 - (skill + this.bot_aggresskill) * 0.05, 0.5);
        }
    }
}
 
vector bot_shotlead(vector targorigin, vector targvelocity, float shotspeed, float shotdelay)
{
    // Try to add code here that predicts gravity effect here, no clue HOW to though ... well not yet atleast...
    return targorigin + targvelocity * (shotdelay + vlen(targorigin - shotorg) / shotspeed);
}
 
bool bot_aim(entity this, .entity weaponentity, float shotspeed, float shotspeedupward, float maxshottime, bool applygravity, bool shot_accurate)
{
    float hf, distanceratio;
    vector v;
    hf = this.dphitcontentsmask;
    this.dphitcontentsmask = DPCONTENTS_SOLID | DPCONTENTS_BODY | DPCONTENTS_CORPSE;
 
    float speed_factor = W_WeaponSpeedFactor(this);
    shotspeed *= speed_factor;
    shotspeedupward *= speed_factor;
    if (!shotspeed)
    {
        LOG_TRACE("bot_aim: WARNING: weapon ", this.(weaponentity).m_weapon.m_name, " shotspeed is zero!");
        shotspeed = 1000000;
    }
    if (!maxshottime)
    {
        LOG_TRACE("bot_aim: WARNING: weapon ", this.(weaponentity).m_weapon.m_name, " maxshottime is zero!");
        maxshottime = 1;
    }
    makevectors(this.v_angle);
    shotorg = this.origin + this.view_ofs;
    shotdir = v_forward;
    vector enemy_org = (this.enemy.absmin + this.enemy.absmax) * 0.5;
    v = bot_shotlead(enemy_org, this.enemy.velocity, shotspeed, this.bot_aimlatency);
 
    // this formula was created starting from empiric values of distance and max hit angle
    // with a player as target (32 qu wide) from the center of it right in front of the bot
    //  distance: 32  50    75   100  150  200  300  400  500
    //   max ang: 44  24  15.1  10.5  6.5  4.9  3.1  2.3  1.8
    float dist = max(10, vlen(v - shotorg));
    float maxfiredeviation = 1000 / (dist - 9) - 0.35;
 
    float f = (shot_accurate) ? 1 : 1.6;
    f += bound(0, (10 - (skill + this.bot_aimskill)) * 0.3, 3);
    maxfiredeviation = min(90, maxfiredeviation * f);
 
    if (applygravity && this.enemy)
    {
        if (!findtrajectorywithleading(shotorg, '0 0 0', '0 0 0', this.enemy, shotspeed, shotspeedupward, maxshottime, 0, this))
        {
            this.dphitcontentsmask = hf;
            return false;
        }
 
        bot_aimdir(this, findtrajectory_velocity - shotspeedupward * '0 0 1', maxfiredeviation);
    }
    else
    {
        bot_aimdir(this, v - shotorg, maxfiredeviation);
        //dprint("AIM: ");dprint(vtos(enemy_org));dprint(" + ");dprint(vtos(this.enemy.velocity));dprint(" * ");dprint(ftos(this.bot_aimlatency + vlen(this.enemy.origin - shotorg) / shotspeed));dprint(" = ");dprint(vtos(v));dprint(" : aimdir = ");dprint(vtos(normalize(v - shotorg)));dprint(" : ");dprint(vtos(shotdir));dprint("\n");
        //traceline(shotorg, shotorg + shotdir * 10000, false, this);
        //if (trace_ent.takedamage)
        //if (trace_fraction < 1)
        //if (!bot_shouldattack(this, trace_ent))
        //  return false;
        traceline(shotorg, enemy_org, false, this);
        if (trace_fraction < 1)
        if (trace_ent != this.enemy)
        if (!bot_shouldattack(this, trace_ent))
        {
            this.dphitcontentsmask = hf;
            return false;
        }
    }
 
    if (time > this.bot_firetimer)
    {
        this.dphitcontentsmask = hf;
        return false;
    }
 
    //if (r > maxshottime * shotspeed)
    //  return false;
    this.dphitcontentsmask = hf;
    return true;
}