EntityPotion.java

package net.minecraft.entity.projectile;

import java.util.Iterator;
import java.util.List;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.init.Items;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.potion.Potion;
import net.minecraft.potion.PotionEffect;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.util.BlockPos;
import net.minecraft.util.MovingObjectPosition;
import net.minecraft.world.World;

public class EntityPotion extends EntityThrowable
{
    /**
     * The damage value of the thrown potion that this EntityPotion represents.
     */
    private ItemStack potionDamage;
    private static final String __OBFID = "CL_00001727";

    public EntityPotion(World worldIn)
    {
        super(worldIn);
    }

    public EntityPotion(World worldIn, EntityLivingBase p_i1789_2_, int p_i1789_3_)
    {
        this(worldIn, p_i1789_2_, new ItemStack(Items.potionitem, 1, p_i1789_3_));
    }

    public EntityPotion(World worldIn, EntityLivingBase p_i1790_2_, ItemStack p_i1790_3_)
    {
        super(worldIn, p_i1790_2_);
        this.potionDamage = p_i1790_3_;
    }

    public EntityPotion(World worldIn, double p_i1792_2_, double p_i1792_4_, double p_i1792_6_, ItemStack p_i1792_8_)
    {
        super(worldIn, p_i1792_2_, p_i1792_4_, p_i1792_6_);
        this.potionDamage = p_i1792_8_;
    }

    /**
     * Gets the amount of gravity to apply to the thrown entity with each tick.
     */
    protected float getGravityVelocity()
    {
        return 0.05F;
    }

    protected float func_70182_d()
    {
        return 0.5F;
    }

    protected float func_70183_g()
    {
        return -20.0F;
    }

    public void setPotionDamage(int p_82340_1_)
    {
        if (this.potionDamage == null)
        {
            this.potionDamage = new ItemStack(Items.potionitem, 1, 0);
        }

        this.potionDamage.setItemDamage(p_82340_1_);
    }

    /**
     * Returns the damage value of the thrown potion that this EntityPotion represents.
     */
    public int getPotionDamage()
    {
        if (this.potionDamage == null)
        {
            this.potionDamage = new ItemStack(Items.potionitem, 1, 0);
        }

        return this.potionDamage.getMetadata();
    }

    /**
     * Called when this EntityThrowable hits a block or entity.
     */
    protected void onImpact(MovingObjectPosition p_70184_1_)
    {
        if (!this.worldObj.isRemote)
        {
            List var2 = Items.potionitem.getEffects(this.potionDamage);

            if (var2 != null && !var2.isEmpty())
            {
                AxisAlignedBB var3 = this.getEntityBoundingBox().expand(4.0D, 2.0D, 4.0D);
                List var4 = this.worldObj.getEntitiesWithinAABB(EntityLivingBase.class, var3);

                if (!var4.isEmpty())
                {
                    Iterator var5 = var4.iterator();

                    while (var5.hasNext())
                    {
                        EntityLivingBase var6 = (EntityLivingBase)var5.next();
                        double var7 = this.getDistanceSqToEntity(var6);

                        if (var7 < 16.0D)
                        {
                            double var9 = 1.0D - Math.sqrt(var7) / 4.0D;

                            if (var6 == p_70184_1_.entityHit)
                            {
                                var9 = 1.0D;
                            }

                            Iterator var11 = var2.iterator();

                            while (var11.hasNext())
                            {
                                PotionEffect var12 = (PotionEffect)var11.next();
                                int var13 = var12.getPotionID();

                                if (Potion.potionTypes[var13].isInstant())
                                {
                                    Potion.potionTypes[var13].func_180793_a(this, this.getThrower(), var6, var12.getAmplifier(), var9);
                                }
                                else
                                {
                                    int var14 = (int)(var9 * (double)var12.getDuration() + 0.5D);

                                    if (var14 > 20)
                                    {
                                        var6.addPotionEffect(new PotionEffect(var13, var14, var12.getAmplifier()));
                                    }
                                }
                            }
                        }
                    }
                }
            }

            this.worldObj.playAuxSFX(2002, new BlockPos(this), this.getPotionDamage());
            this.setDead();
        }
    }

    /**
     * (abstract) Protected helper method to read subclass entity data from NBT.
     */
    public void readEntityFromNBT(NBTTagCompound tagCompund)
    {
        super.readEntityFromNBT(tagCompund);

        if (tagCompund.hasKey("Potion", 10))
        {
            this.potionDamage = ItemStack.loadItemStackFromNBT(tagCompund.getCompoundTag("Potion"));
        }
        else
        {
            this.setPotionDamage(tagCompund.getInteger("potionValue"));
        }

        if (this.potionDamage == null)
        {
            this.setDead();
        }
    }

    /**
     * (abstract) Protected helper method to write subclass entity data to NBT.
     */
    public void writeEntityToNBT(NBTTagCompound tagCompound)
    {
        super.writeEntityToNBT(tagCompound);

        if (this.potionDamage != null)
        {
            tagCompound.setTag("Potion", this.potionDamage.writeToNBT(new NBTTagCompound()));
        }
    }
}