EntityEnderEye.java

package net.minecraft.entity.item;

import net.minecraft.entity.Entity;
import net.minecraft.init.Items;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.BlockPos;
import net.minecraft.util.EnumParticleTypes;
import net.minecraft.util.MathHelper;
import net.minecraft.world.World;

public class EntityEnderEye extends Entity
{
    /** 'x' location the eye should float towards. */
    private double targetX;

    /** 'y' location the eye should float towards. */
    private double targetY;

    /** 'z' location the eye should float towards. */
    private double targetZ;
    private int despawnTimer;
    private boolean shatterOrDrop;
    private static final String __OBFID = "CL_00001716";

    public EntityEnderEye(World worldIn)
    {
        super(worldIn);
        this.setSize(0.25F, 0.25F);
    }

    protected void entityInit() {}

    public EntityEnderEye(World worldIn, double p_i1758_2_, double p_i1758_4_, double p_i1758_6_)
    {
        super(worldIn);
        this.despawnTimer = 0;
        this.setSize(0.25F, 0.25F);
        this.setPosition(p_i1758_2_, p_i1758_4_, p_i1758_6_);
    }

    public void func_180465_a(BlockPos p_180465_1_)
    {
        double var2 = (double)p_180465_1_.getX();
        int var4 = p_180465_1_.getY();
        double var5 = (double)p_180465_1_.getZ();
        double var7 = var2 - this.posX;
        double var9 = var5 - this.posZ;
        float var11 = MathHelper.sqrt_double(var7 * var7 + var9 * var9);

        if (var11 > 12.0F)
        {
            this.targetX = this.posX + var7 / (double)var11 * 12.0D;
            this.targetZ = this.posZ + var9 / (double)var11 * 12.0D;
            this.targetY = this.posY + 8.0D;
        }
        else
        {
            this.targetX = var2;
            this.targetY = (double)var4;
            this.targetZ = var5;
        }

        this.despawnTimer = 0;
        this.shatterOrDrop = this.rand.nextInt(5) > 0;
    }

    /**
     * Called to update the entity's position/logic.
     */
    public void onUpdate()
    {
        this.lastTickPosX = this.posX;
        this.lastTickPosY = this.posY;
        this.lastTickPosZ = this.posZ;
        super.onUpdate();
        this.posX += this.motionX;
        this.posY += this.motionY;
        this.posZ += this.motionZ;
        float var1 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
        this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);

        for (this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var1) * 180.0D / Math.PI); this.rotationPitch - this.prevRotationPitch < -180.0F; this.prevRotationPitch -= 360.0F)
        {
            ;
        }

        while (this.rotationPitch - this.prevRotationPitch >= 180.0F)
        {
            this.prevRotationPitch += 360.0F;
        }

        while (this.rotationYaw - this.prevRotationYaw < -180.0F)
        {
            this.prevRotationYaw -= 360.0F;
        }

        while (this.rotationYaw - this.prevRotationYaw >= 180.0F)
        {
            this.prevRotationYaw += 360.0F;
        }

        this.rotationPitch = this.prevRotationPitch + (this.rotationPitch - this.prevRotationPitch) * 0.2F;
        this.rotationYaw = this.prevRotationYaw + (this.rotationYaw - this.prevRotationYaw) * 0.2F;

        if (!this.worldObj.isRemote)
        {
            double var2 = this.targetX - this.posX;
            double var4 = this.targetZ - this.posZ;
            float var6 = (float)Math.sqrt(var2 * var2 + var4 * var4);
            float var7 = (float)Math.atan2(var4, var2);
            double var8 = (double)var1 + (double)(var6 - var1) * 0.0025D;

            if (var6 < 1.0F)
            {
                var8 *= 0.8D;
                this.motionY *= 0.8D;
            }

            this.motionX = Math.cos((double)var7) * var8;
            this.motionZ = Math.sin((double)var7) * var8;

            if (this.posY < this.targetY)
            {
                this.motionY += (1.0D - this.motionY) * 0.014999999664723873D;
            }
            else
            {
                this.motionY += (-1.0D - this.motionY) * 0.014999999664723873D;
            }
        }

        float var10 = 0.25F;

        if (this.isInWater())
        {
            for (int var3 = 0; var3 < 4; ++var3)
            {
                this.worldObj.spawnParticle(EnumParticleTypes.WATER_BUBBLE, this.posX - this.motionX * (double)var10, this.posY - this.motionY * (double)var10, this.posZ - this.motionZ * (double)var10, this.motionX, this.motionY, this.motionZ, new int[0]);
            }
        }
        else
        {
            this.worldObj.spawnParticle(EnumParticleTypes.PORTAL, this.posX - this.motionX * (double)var10 + this.rand.nextDouble() * 0.6D - 0.3D, this.posY - this.motionY * (double)var10 - 0.5D, this.posZ - this.motionZ * (double)var10 + this.rand.nextDouble() * 0.6D - 0.3D, this.motionX, this.motionY, this.motionZ, new int[0]);
        }

        if (!this.worldObj.isRemote)
        {
            this.setPosition(this.posX, this.posY, this.posZ);
            ++this.despawnTimer;

            if (this.despawnTimer > 80 && !this.worldObj.isRemote)
            {
                this.setDead();

                if (this.shatterOrDrop)
                {
                    this.worldObj.spawnEntityInWorld(new EntityItem(this.worldObj, this.posX, this.posY, this.posZ, new ItemStack(Items.ender_eye)));
                }
                else
                {
                    this.worldObj.playAuxSFX(2003, new BlockPos(this), 0);
                }
            }
        }
    }

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

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

    /**
     * Gets how bright this entity is.
     */
    public float getBrightness(float p_70013_1_)
    {
        return 1.0F;
    }

    /**
     * If returns false, the item will not inflict any damage against entities.
     */
    public boolean canAttackWithItem()
    {
        return false;
    }
}