ParticleFX

package com.anim8.gscraft.particles;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import net.minecraft.client.particle.EntityFX;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.world.World;

@SideOnly(Side.CLIENT)
public class EntityWhirlwindDustFX extends EntityFX
{
    float particleScaleOverTime;

    private double entityCentreX, entityCentreY, entityCentreZ, distToCentre, secondsPerRevolution;
    private float tickCount;

    public EntityWhirlwindDustFX(World par1World, double par2, double par4, double par6, double par8, double par10, double par12, double centreX, double centreY, double centreZ, double secs4Rev)
    {
        this(par1World, par2, par4, par6, par8, par10, par12, 1.0F, centreX, centreY, centreZ, secs4Rev);
    }

    public EntityWhirlwindDustFX(World par1World, double par2, double par4, double par6, double par8, double par10, double par12, float par14, double centreX, double centreY, double centreZ, double secs4Rev)
    {
        super(par1World, par2, par4, par6, 0.0D, 0.0D, 0.0D);

        this.secondsPerRevolution = secs4Rev;

        this.entityCentreX = centreX;
        this.entityCentreY = centreY;
        this.entityCentreZ = centreZ;

        this.distToCentre = Math.sqrt((posX - entityCentreX) * (posX - entityCentreX) + (posZ - entityCentreZ) * (posZ - entityCentreZ));


        this.particleRed = this.particleGreen = this.particleBlue = (float)(Math.random() * 0.30000001192092896D);

        this.particleScale *= 0.75F *2 ;

        this.particleScaleOverTime = this.particleScale;
        this.particleMaxAge = 32;



        this.setParticleTextureIndex(7);
    }

    public void renderParticle(Tessellator par1Tessellator, float par2, float par3, float par4, float par5, float par6, float par7)
    {
        float f6 = ((float)this.particleAge + par2) / (float)this.particleMaxAge * 32.0F;

        if (f6 < 0.0F)
        {
            f6 = 0.0F;
        }

        if (f6 > 1.0F)
        {
            f6 = 1.0F;
        }

        this.particleScale = this.particleScaleOverTime * f6;
        super.renderParticle(par1Tessellator, par2, par3, par4, par5, par6, par7);
    }


    public void onUpdate()
    {
        float maxAgeOverTime = this.particleAge / particleMaxAge;

        this.prevPosX = this.posX;
        this.prevPosY = this.posY;
        this.prevPosZ = this.posZ;

        if (this.particleAge++ >= this.particleMaxAge)
        {
            tickCount = 0;
            this.setDead();
        }



        tickCount++;
        this.posX = this.entityCentreX + distToCentre * Math.cos(2 * 3.141 * (tickCount / 20) / secondsPerRevolution);
        this.posZ = this.entityCentreZ + distToCentre * Math.sin(2 * 3.141 * (tickCount / 20) / secondsPerRevolution);

    }
}