001    package net.minecraft.client.particle;
002    
003    import cpw.mods.fml.common.Side;
004    import cpw.mods.fml.common.asm.SideOnly;
005    import net.minecraft.client.renderer.Tessellator;
006    import net.minecraft.world.World;
007    
008    @SideOnly(Side.CLIENT)
009    public class EntitySpellParticleFX extends EntityFX
010    {
011        private int field_70590_a = 128;
012    
013        public EntitySpellParticleFX(World par1World, double par2, double par4, double par6, double par8, double par10, double par12)
014        {
015            super(par1World, par2, par4, par6, par8, par10, par12);
016            this.motionY *= 0.20000000298023224D;
017    
018            if (par8 == 0.0D && par12 == 0.0D)
019            {
020                this.motionX *= 0.10000000149011612D;
021                this.motionZ *= 0.10000000149011612D;
022            }
023    
024            this.particleScale *= 0.75F;
025            this.particleMaxAge = (int)(8.0D / (Math.random() * 0.8D + 0.2D));
026            this.noClip = false;
027        }
028    
029        public void renderParticle(Tessellator par1Tessellator, float par2, float par3, float par4, float par5, float par6, float par7)
030        {
031            float var8 = ((float)this.particleAge + par2) / (float)this.particleMaxAge * 32.0F;
032    
033            if (var8 < 0.0F)
034            {
035                var8 = 0.0F;
036            }
037    
038            if (var8 > 1.0F)
039            {
040                var8 = 1.0F;
041            }
042    
043            super.renderParticle(par1Tessellator, par2, par3, par4, par5, par6, par7);
044        }
045    
046        /**
047         * Called to update the entity's position/logic.
048         */
049        public void onUpdate()
050        {
051            this.prevPosX = this.posX;
052            this.prevPosY = this.posY;
053            this.prevPosZ = this.posZ;
054    
055            if (this.particleAge++ >= this.particleMaxAge)
056            {
057                this.setDead();
058            }
059    
060            this.setParticleTextureIndex(this.field_70590_a + (7 - this.particleAge * 8 / this.particleMaxAge));
061            this.motionY += 0.004D;
062            this.moveEntity(this.motionX, this.motionY, this.motionZ);
063    
064            if (this.posY == this.prevPosY)
065            {
066                this.motionX *= 1.1D;
067                this.motionZ *= 1.1D;
068            }
069    
070            this.motionX *= 0.9599999785423279D;
071            this.motionY *= 0.9599999785423279D;
072            this.motionZ *= 0.9599999785423279D;
073    
074            if (this.onGround)
075            {
076                this.motionX *= 0.699999988079071D;
077                this.motionZ *= 0.699999988079071D;
078            }
079        }
080    
081        public void func_70589_b(int par1)
082        {
083            this.field_70590_a = par1;
084        }
085    }