Script:Files:script/vehicles/weapons/antiair.script

object vehicle_weapon_gatling : vehicle_weapon_base {
    void            preinit();
    void            init();
    void            Fire();
    void            SpinBarrels();
    void            IdleEmpty();
    void            OnSetPlayer( entity p );

    float            projectileIndex;
    float            clientProjectileIndex;

    float            jointHandle;
    float            spinHandle;

    float            fireRate;
    float            triggerDelay;
    float            spread;
    float            nextFireTime;

    float            spinSpeed;
    float            spinStop;
    float            spinFire;

    entity            vehicle;

    float            localSurface;

    boolean            playingFireSound;
    boolean            spinBarrelsActive;
    boolean            brassSoundActive;
    boolean            wantsFire;

    string            muzzleFlashFX;
    string            fireStartSound;
    string            fireStopSound;
    string            barrelLoopSound;
    string            barrelLoopLowSound;
    string            brassStartSound;
    string            brassStopSound;

    float            barrelSoundChannel;
    float            barrelLowSoundChannel;
    float            fireSoundChannel;
    float            brassSoundChannel;

    float            showTracer;
}

void vehicle_weapon_gatling::preinit() {
    projectileIndex            = GetEntityDef( getKey( "def_projectile" ) );
    clientProjectileIndex    = GetEntityDef( getKey( "client_projectile" ) );

    vehicle                    = getVehicle();

    jointHandle                = vehicle.getJointHandle( getKey( "muzzle" ) );
    spinHandle                = vehicle.getJointHandle( getKey( "spin_joint" ) );

    muzzleFlashFX            = getKey( "muzzle_flash" );
    fireStartSound            = getKey( "fire_start_sound" );
    fireStopSound            = getKey( "fire_stop_sound" );
    barrelLoopSound            = getKey( "barrel_loop_sound" );
    barrelLoopLowSound        = getKey( "barrel_loop_low_sound" );
    brassStartSound            = getKey( "brass_start_sound" );
    brassStopSound            = getKey( "brass_stop_sound" );

    barrelSoundChannel        = getFloatKey( "sound_channel_barrel" );
    if ( barrelSoundChannel == 0 ) {
        barrelSoundChannel = SND_WEAPON_MECH;
    }
    barrelLowSoundChannel    = getFloatKey( "sound_channel_barrel_low" );
    if ( barrelLowSoundChannel == 0 ) {
        barrelLowSoundChannel = SND_WEAPON_MOVE;
    }
    fireSoundChannel        = getFloatKey( "sound_channel_fire" );
    if ( fireSoundChannel == 0 ) {
        fireSoundChannel = SND_WEAPON_FIRE;
    }
    brassSoundChannel        = getFloatKey( "sound_channel_brass" );
    if ( brassSoundChannel == 0 ) {
        brassSoundChannel = SND_WEAPON_BRASS;
    }

    fireRate                = getFloatKey( "fire_rate" );
    triggerDelay            = getFloatKey( "trigger_delay" );
    spread                    = getFloatKey( "spread" );

    spinStop                 = getFloatKey( "spin_stop" );
    spinFire                 = getFloatKey( "spin_fire" );

    localSurface            = -1;

    string localSurfaceName    = getKey( "surface_name" );
    if ( localSurfaceName != "" ) {
        localSurface = vehicle.getSurfaceId( localSurfaceName );
    }

    showTracer                = TRACER_CHANCE;
}

void vehicle_weapon_gatling::init() {
}

void vehicle_weapon_gatling::IdleEmpty() {
    if ( playingFireSound ) {
        playingFireSound = false;
        vehicle.startSound( fireStopSound, fireSoundChannel );
    }
    if ( brassSoundActive ) {
        brassSoundActive = false;
        vehicle.startSound( brassStopSound, brassSoundChannel );
    }
}

void vehicle_weapon_gatling::Fire() {
    boolean showMuzzle;

    playingFireSound = false;

    if ( !spinBarrelsActive ) {
        thread SpinBarrels();
    }

    float startFiringTime = sys.getTime() + triggerDelay;

    wantsFire = true;
    while ( user.getButton( PK_ATTACK ) && !myVehicle.isWeaponEMPed() && CanRemoveCharge() ) {

        if ( spinSpeed < spinFire ) {
            sys.waitFrame();
            continue;
        }

        user.proxyFiringWeapon = true;

        showMuzzle = true;
        if ( localSurface != -1 ) {
            if ( vehicle.isSurfaceHidden( localSurface ) ) {
                showMuzzle = false;
                showTracer = TRACER_OFF;
            } else {
                showTracer = TRACER_CHANCE;
            }
        }

        UpdateCharge();

        if ( !playingFireSound ) {
            playingFireSound = true;
            vehicle.startSound( fireStartSound, fireSoundChannel );
            if ( user == sys.getLocalViewPlayer() ) {
                vehicle.startSound( brassStartSound, brassSoundChannel );
                brassSoundActive = true;
            }
        }

        if ( sys.getTime() >= nextFireTime ) {
            vehicle.launchBullet( user, vehicle, projectileIndex, spread, vehicle.getJointPos( jointHandle ), vehicle.getJointAxis( jointHandle, 0 ), showTracer, true );

            nextFireTime = sys.getTime() + fireRate;

            RemoveCharge();
        }

        if ( showMuzzle ) {
            vehicle.playJointEffect( muzzleFlashFX, jointHandle, 0 );
        }

        sys.waitFrame();
    }

    wantsFire = false;

    if ( user != $null_entity ) {
        user.proxyFiringWeapon = false;
    }

    if ( playingFireSound ) {
        playingFireSound = false;
        vehicle.startSound( fireStopSound, fireSoundChannel );
    }
    if ( brassSoundActive ) {
        brassSoundActive = false;
        vehicle.startSound( brassStopSound, brassSoundChannel );
    }

    GoToIdle();
}

void vehicle_weapon_gatling::OnSetPlayer( entity p ) { 
    if ( p != user ) {
        if ( user != $null_entity ) {
            user.gatlingSpeed = 0.0f;
        }

        wantsFire = false;
    }

    OnSetPlayer_Base( p );
}

void vehicle_weapon_gatling::SpinBarrels() {
    spinBarrelsActive = true;

    vector ang;

    vehicle.startSound( barrelLoopLowSound, barrelLowSoundChannel );
    vehicle.fadeSound( barrelLowSoundChannel, -20.0f, 0.0f );

    vehicle.startSound( barrelLoopSound, barrelSoundChannel );
    vehicle.fadeSound( barrelSoundChannel, -20.0f, 0.0f );

    // start & end pitch for the main loop sound
    float basePitch        = 0.4f;
    float maxPitch        = 0.8f;

    // start & end pitch for the low loop sound
    float basePitchLow    = 1.0f;
    float maxPitchLow    = 1.5f;

    float pitchRange    = maxPitch - basePitch;
    float pitchRangeLow    = maxPitchLow - basePitchLow;

    while ( true ) {
        sys.waitFrame();

        if ( wantsFire ) {
            if ( spinSpeed < spinFire ) {
                if ( spinSpeed < spinStop ) {
                    spinSpeed = spinStop;
                }
                spinSpeed = spinSpeed + 90.f;
            } else {
                spinSpeed = spinFire;
            }
        } else {
            if ( spinSpeed > spinStop ) {
                spinSpeed = spinSpeed - 30.f;
            }

            if ( spinSpeed <= spinStop ) {
                spinSpeed = 0.f;
            }
        }

        if ( user != $null_entity ) {
            user.gatlingSpeed = spinSpeed;
        }

        ang_z += spinSpeed * sys.getFrameTime();
        vehicle.setJointAngle( spinHandle, JOINTMOD_LOCAL, ang );

        float fraction = ( spinSpeed - spinStop ) / ( spinFire - spinStop );
        if ( fraction < 0.0f ) {
            fraction = 0.0f;
        }

        float pitch = fraction * pitchRange + basePitch;
        vehicle.setChannelPitchShift( barrelSoundChannel, pitch );

        float pitchLow = fraction * pitchRangeLow + basePitchLow;
        vehicle.setChannelPitchShift( barrelLowSoundChannel, pitchLow );

        float volume = sys.sqrt( sys.sin( fraction * 90 ) ) * 20.0f - 20.0f;
        vehicle.fadeSound( barrelSoundChannel, volume, 0.0f );

        float volumeLow = sys.sqrt( sys.sin( ( 1.0f - fraction ) * 90 ) ) * 5.0f - 5.0f;
        vehicle.fadeSound( barrelLowSoundChannel, volumeLow, 0.0f );

        if ( spinSpeed == 0.0f ) {
            break;
        }
    }

    // fade the sounds out
    vehicle.fadeSound( barrelSoundChannel, -60.0f, 0.25f );
    vehicle.fadeSound( barrelLowSoundChannel, -60.0f, 0.25f );

    spinBarrelsActive = false;
}