EntityPortalFX.java

package net.minecraft.client.particle;

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

@SideOnly(Side.CLIENT)
public class EntityPortalFX extends EntityFX
{
    private float portalParticleScale;
    private double portalPosX;
    private double portalPosY;
    private double portalPosZ;

    public EntityPortalFX(World par1World, double par2, double par4, double par6, double par8, double par10, double par12)
    {
        super(par1World, par2, par4, par6, par8, par10, par12);
        this.motionX = par8;
        this.motionY = par10;
        this.motionZ = par12;
        this.portalPosX = this.posX = par2;
        this.portalPosY = this.posY = par4;
        this.portalPosZ = this.posZ = par6;
        float f = this.rand.nextFloat() * 0.6F + 0.4F;
        this.portalParticleScale = this.particleScale = this.rand.nextFloat() * 0.2F + 0.5F;
        this.particleRed = this.particleGreen = this.particleBlue = 1.0F * f;
        this.particleGreen *= 0.3F;
        this.particleRed *= 0.9F;
        this.particleMaxAge = (int)(Math.random() * 10.0D) + 40;
        this.noClip = true;
        this.setParticleTextureIndex((int)(Math.random() * 8.0D));
    }

    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;
        f6 = 1.0F - f6;
        f6 *= f6;
        f6 = 1.0F - f6;
        this.particleScale = this.portalParticleScale * f6;
        super.renderParticle(par1Tessellator, par2, par3, par4, par5, par6, par7);
    }

    public int getBrightnessForRender(float par1)
    {
        int i = super.getBrightnessForRender(par1);
        float f1 = (float)this.particleAge / (float)this.particleMaxAge;
        f1 *= f1;
        f1 *= f1;
        int j = i & 255;
        int k = i >> 16 & 255;
        k += (int)(f1 * 15.0F * 16.0F);

        if (k > 240)
        {
            k = 240;
        }

        return j | k << 16;
    }

    /**
     * Gets how bright this entity is.
     */
    public float getBrightness(float par1)
    {
        float f1 = super.getBrightness(par1);
        float f2 = (float)this.particleAge / (float)this.particleMaxAge;
        f2 = f2 * f2 * f2 * f2;
        return f1 * (1.0F - f2) + f2;
    }

    /**
     * Called to update the entity's position/logic.
     */
    public void onUpdate()
    {
        this.prevPosX = this.posX;
        this.prevPosY = this.posY;
        this.prevPosZ = this.posZ;
        float f = (float)this.particleAge / (float)this.particleMaxAge;
        float f1 = f;
        f = -f + f * f * 2.0F;
        f = 1.0F - f;
        this.posX = this.portalPosX + this.motionX * (double)f;
        this.posY = this.portalPosY + this.motionY * (double)f + (double)(1.0F - f1);
        this.posZ = this.portalPosZ + this.motionZ * (double)f;

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