Onslaught.ONSImpactSparks

class ONSImpactSparks extends Emitter
    native;

#exec OBJ LOAD FILE=..\Textures\AW-2004Particles.utx
#exec OBJ LOAD FILE=..\Sounds\ONSVehicleSounds-S.uax

var() float         HorizontalVelocityRange;
var() float         AdditionalVelocityScale;
var() float         MaxAdditionalVelocity;
var() float         SparkRadiusScale;
var() interpcurve   SparkRate; // function of sliding velocity magnitude.

var() sound         ScrapeSound;

var   bool          bSparksActive;

simulated event UpdateSparks(float SparkRadius, vector VehicleVelocity)
{
    local float UseRadius, VelMag, ParticleRate;
    local vector LocalVehVel, AddVel;

    // Use function to figure out how many particles we should be spewing.
    VelMag = VSize(VehicleVelocity);
    ParticleRate = InterpCurveEval(SparkRate, VelMag);

    if(ParticleRate > 0.001)
    {
        // Transform velocity into particle system space and project into contact plane.
        LocalVehVel = (VehicleVelocity << Rotation);
        LocalVehVel.X = 0;

        // If sparks are just turning on, set OldLocation to current Location to avoid spawn interpolation.
        if(!bSparksActive)
            OldLocation = Location;

        bSparksActive = true;

        UseRadius = SparkRadiusScale * SparkRadius;

        Emitters[0].ParticlesPerSecond = ParticleRate;
        Emitters[0].InitialParticlesPerSecond = ParticleRate;
        Emitters[0].AllParticlesDead = false;

        Emitters[0].StartLocationRange.Y.Min = -UseRadius;
        Emitters[0].StartLocationRange.Y.Max = UseRadius;

        Emitters[0].StartLocationRange.Z.Min = -UseRadius;
        Emitters[0].StartLocationRange.Z.Max = UseRadius;

        // Add velocity of vehicle to sparks.

        AddVel = AdditionalVelocityScale * LocalVehVel;
        if( VSize(AddVel) > MaxAdditionalVelocity )
        {
            AddVel = normal(AddVel) * MaxAdditionalVelocity;
        }

        Emitters[0].StartVelocityRange.Y.Min = (LocalVehVel.Y + AddVel.Y) - HorizontalVelocityRange;
        Emitters[0].StartVelocityRange.Y.Max = (LocalVehVel.Y + AddVel.Y) + HorizontalVelocityRange;

        Emitters[0].StartVelocityRange.Z.Min = (LocalVehVel.Z + AddVel.Z) - HorizontalVelocityRange;
        Emitters[0].StartVelocityRange.Z.Max = (LocalVehVel.Z + AddVel.Z) + HorizontalVelocityRange;

        AmbientSound = ScrapeSound;
    }
    else
    {
        bSparksActive = false;

        Emitters[0].ParticlesPerSecond = 0;
        Emitters[0].InitialParticlesPerSecond = 0;

        AmbientSound = None;
    }
}

defaultproperties
{
     HorizontalVelocityRange=500.000000
     AdditionalVelocityScale=0.250000
     MaxAdditionalVelocity=200.000000
     SparkRadiusScale=0.050000
     SparkRate=(Points=(,(InVal=350.000000),(InVal=1200.000000,OutVal=600.000000),(InVal=100000.000000,OutVal=600.000000)))
     ScrapeSound=Sound'ONSVehicleSounds-S.CollisionSounds.MetalScrape03'
     Begin Object Class=SpriteEmitter Name=SpriteEmitter0
         UseDirectionAs=PTDU_Up
         UseColorScale=True
         RespawnDeadParticles=False
         UseSizeScale=True
         UseRegularSizeScale=False
         UniformSize=True
         ScaleSizeYByVelocity=True
         AutomaticInitialSpawning=False
         Acceleration=(Z=-600.000000)
         DampingFactorRange=(X=(Min=0.500000,Max=0.500000),Y=(Min=0.500000,Max=0.500000),Z=(Min=0.100000,Max=0.100000))
         ColorScale(0)=(Color=(B=174,G=255,R=255))
         ColorScale(1)=(RelativeTime=0.500000,Color=(B=49,G=214,R=242))
         ColorScale(2)=(RelativeTime=1.000000,Color=(G=40,R=102))
         MaxParticles=1000
         StartLocationRange=(X=(Min=-10.000000,Max=10.000000))
         UseRotationFrom=PTRS_Actor
         SizeScale(1)=(RelativeTime=0.050000)
         SizeScale(2)=(RelativeTime=0.100000,RelativeSize=2.000000)
         SizeScale(3)=(RelativeTime=1.000000,RelativeSize=2.000000)
         StartSizeRange=(X=(Min=2.000000,Max=4.000000),Y=(Min=2.000000,Max=2.000000))
         ScaleSizeByVelocityMultiplier=(X=0.010000,Y=0.003000)
         ScaleSizeByVelocityMax=1000.000000
         Texture=Texture'AW-2004Particles.Energy.SparkHead'
         LifetimeRange=(Min=0.400000,Max=0.600000)
         StartVelocityRange=(X=(Min=350.000000,Max=500.000000),Y=(Min=-50.000000,Max=50.000000),Z=(Min=-50.000000,Max=50.000000))
         MaxAbsVelocity=(X=1000.000000,Y=1000.000000,Z=1000.000000)
         VelocityLossRange=(X=(Min=1.000000,Max=2.000000),Y=(Min=1.000000,Max=2.000000),Z=(Min=1.000000,Max=2.000000))
     End Object
     Emitters(0)=SpriteEmitter'Onslaught.ONSImpactSparks.SpriteEmitter0'

     bNoDelete=False
     SoundVolume=80
}