001    package net.minecraft.client.particle;
002    
003    import cpw.mods.fml.relauncher.Side;
004    import cpw.mods.fml.relauncher.SideOnly;
005    import net.minecraft.client.renderer.Tessellator;
006    import net.minecraft.world.World;
007    
008    @SideOnly(Side.CLIENT)
009    public class EntityPortalFX extends EntityFX
010    {
011        private float portalParticleScale;
012        private double portalPosX;
013        private double portalPosY;
014        private double portalPosZ;
015    
016        public EntityPortalFX(World par1World, double par2, double par4, double par6, double par8, double par10, double par12)
017        {
018            super(par1World, par2, par4, par6, par8, par10, par12);
019            this.motionX = par8;
020            this.motionY = par10;
021            this.motionZ = par12;
022            this.portalPosX = this.posX = par2;
023            this.portalPosY = this.posY = par4;
024            this.portalPosZ = this.posZ = par6;
025            float var14 = this.rand.nextFloat() * 0.6F + 0.4F;
026            this.portalParticleScale = this.particleScale = this.rand.nextFloat() * 0.2F + 0.5F;
027            this.particleRed = this.particleGreen = this.particleBlue = 1.0F * var14;
028            this.particleGreen *= 0.3F;
029            this.particleRed *= 0.9F;
030            this.particleMaxAge = (int)(Math.random() * 10.0D) + 40;
031            this.noClip = true;
032            this.setParticleTextureIndex((int)(Math.random() * 8.0D));
033        }
034    
035        public void renderParticle(Tessellator par1Tessellator, float par2, float par3, float par4, float par5, float par6, float par7)
036        {
037            float var8 = ((float)this.particleAge + par2) / (float)this.particleMaxAge;
038            var8 = 1.0F - var8;
039            var8 *= var8;
040            var8 = 1.0F - var8;
041            this.particleScale = this.portalParticleScale * var8;
042            super.renderParticle(par1Tessellator, par2, par3, par4, par5, par6, par7);
043        }
044    
045        public int getBrightnessForRender(float par1)
046        {
047            int var2 = super.getBrightnessForRender(par1);
048            float var3 = (float)this.particleAge / (float)this.particleMaxAge;
049            var3 *= var3;
050            var3 *= var3;
051            int var4 = var2 & 255;
052            int var5 = var2 >> 16 & 255;
053            var5 += (int)(var3 * 15.0F * 16.0F);
054    
055            if (var5 > 240)
056            {
057                var5 = 240;
058            }
059    
060            return var4 | var5 << 16;
061        }
062    
063        /**
064         * Gets how bright this entity is.
065         */
066        public float getBrightness(float par1)
067        {
068            float var2 = super.getBrightness(par1);
069            float var3 = (float)this.particleAge / (float)this.particleMaxAge;
070            var3 = var3 * var3 * var3 * var3;
071            return var2 * (1.0F - var3) + var3;
072        }
073    
074        /**
075         * Called to update the entity's position/logic.
076         */
077        public void onUpdate()
078        {
079            this.prevPosX = this.posX;
080            this.prevPosY = this.posY;
081            this.prevPosZ = this.posZ;
082            float var1 = (float)this.particleAge / (float)this.particleMaxAge;
083            float var2 = var1;
084            var1 = -var1 + var1 * var1 * 2.0F;
085            var1 = 1.0F - var1;
086            this.posX = this.portalPosX + this.motionX * (double)var1;
087            this.posY = this.portalPosY + this.motionY * (double)var1 + (double)(1.0F - var2);
088            this.posZ = this.portalPosZ + this.motionZ * (double)var1;
089    
090            if (this.particleAge++ >= this.particleMaxAge)
091            {
092                this.setDead();
093            }
094        }
095    }