Package net.minecraft.src

Source Code of net.minecraft.src.EntityItem

package net.minecraft.src;

import java.util.Iterator;

import net.minecraft.src.DamageSource;

import org.spoutcraft.api.Spoutcraft;
import org.spoutcraft.api.material.CustomBlock;
import org.spoutcraft.api.material.MaterialData;

public class EntityItem extends Entity {

  /**
   * The age of this EntityItem (used to animate it up and down as well as expire it)
   */
  public int age;
  public int delayBeforeCanPickup;

  /** The health of this EntityItem. (For example, damage for tools) */
  private int health;

  /** The EntityItem's random initial float height. */
  public float hoverStart;

  public EntityItem(World par1World, double par2, double par4, double par6) {
    super(par1World);   
    this.health = 5;
    this.hoverStart = (float)(Math.random() * Math.PI * 2.0D);
    this.setSize(0.25F, 0.25F);
    this.yOffset = this.height / 2.0F;
    this.setPosition(par2, par4, par6);
    this.rotationYaw = (float)(Math.random() * 360.0D);
    this.motionX = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D));
    this.motionY = 0.20000000298023224D;
    this.motionZ = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D));
  }

  public EntityItem(World par1World, double par2, double par4, double par6, ItemStack par8ItemStack) {
    this(par1World, par2, par4, par6);
    this.setEntityItemStack(par8ItemStack);
  }

  /**
   * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
   * prevent them from trampling crops
   */
  protected boolean canTriggerWalking() {
    return false;
  }

  public EntityItem(World par1World) {
    super(par1World);   
    this.health = 5;
    this.hoverStart = (float)(Math.random() * Math.PI * 2.0D);
    this.setSize(0.25F, 0.25F);
    this.yOffset = this.height / 2.0F;
  }

  protected void entityInit() {
    this.getDataWatcher().addObjectByDataType(10, 5);
  }

  /**
   * Called to update the entity's position/logic.
   */
  public void onUpdate() {
    super.onUpdate();

    if (this.delayBeforeCanPickup > 0) {
      --this.delayBeforeCanPickup;
    }

    this.prevPosX = this.posX;
    this.prevPosY = this.posY;
    this.prevPosZ = this.posZ;
    this.motionY -= 0.03999999910593033D;
    this.noClip = this.pushOutOfBlocks(this.posX, (this.boundingBox.minY + this.boundingBox.maxY) / 2.0D, this.posZ);
    this.moveEntity(this.motionX, this.motionY, this.motionZ);
    boolean var1 = (int)this.prevPosX != (int)this.posX || (int)this.prevPosY != (int)this.posY || (int)this.prevPosZ != (int)this.posZ;

    if (var1 || this.ticksExisted % 25 == 0) {
      if (this.worldObj.getBlockMaterial(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.posY), MathHelper.floor_double(this.posZ)) == Material.lava) {
        this.motionY = 0.20000000298023224D;
        this.motionX = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F);
        this.motionZ = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F);
        this.playSound("random.fizz", 0.4F, 2.0F + this.rand.nextFloat() * 0.4F);
      }

      if (!this.worldObj.isRemote) {
        this.searchForOtherItemsNearby();
      }
    }

    float var2 = 0.98F;

    if (this.onGround) {
      var2 = 0.58800006F;
      int var3 = this.worldObj.getBlockId(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.boundingBox.minY) - 1, MathHelper.floor_double(this.posZ));

      if (var3 > 0) {
        var2 = Block.blocksList[var3].slipperiness * 0.98F;
        // Spout Start
        if (!worldObj.isRemote) {
          int x = MathHelper.floor_double(this.posX);
          int y = MathHelper.floor_double(this.boundingBox.minY) - 1;
          int z = MathHelper.floor_double(this.posZ);
          short customId = Spoutcraft.getChunkAt(worldObj, x, y, z).getCustomBlockId(x, y, z);
          if (customId > 0) {
            CustomBlock block = MaterialData.getCustomBlock(customId);
            if (block != null) {
              var2 = block.getFriction() * 0.98F;
            }
          }
        }
        // Spout End
      }
    }

    this.motionX *= (double)var2;
    this.motionY *= 0.9800000190734863D;
    this.motionZ *= (double)var2;

    if (this.onGround) {
      this.motionY *= -0.5D;
    }

    ++this.age;

    if (!this.worldObj.isRemote && this.age >= 6000) {
      this.setDead();
    }
  }

  /**
   * Looks for other itemstacks nearby and tries to stack them together
   */
  private void searchForOtherItemsNearby() {
    Iterator var1 = this.worldObj.getEntitiesWithinAABB(EntityItem.class, this.boundingBox.expand(0.5D, 0.0D, 0.5D)).iterator();

    while (var1.hasNext()) {
      EntityItem var2 = (EntityItem)var1.next();
      this.combineItems(var2);
    }
  }

  /**
   * Tries to merge this item with the item passed as the parameter. Returns true if successful. Either this item or the
   * other item will  be removed from the world.
   */
  public boolean combineItems(EntityItem par1EntityItem) {
    if (par1EntityItem == this) {
      return false;
    } else if (par1EntityItem.isEntityAlive() && this.isEntityAlive()) {
      ItemStack var2 = this.getEntityItem();
      ItemStack var3 = par1EntityItem.getEntityItem();

      if (var3.getItem() != var2.getItem()) {
        return false;
      } else if (var3.hasTagCompound() ^ var2.hasTagCompound()) {
        return false;
      } else if (var3.hasTagCompound() && !var3.getTagCompound().equals(var2.getTagCompound())) {
        return false;
      } else if (var3.getItem().getHasSubtypes() && var3.getItemDamage() != var2.getItemDamage()) {
        return false;
      } else if (var3.stackSize < var2.stackSize) {
        return par1EntityItem.combineItems(this);
      } else if (var3.stackSize + var2.stackSize > var3.getMaxStackSize()) {
        return false;
      } else {
        var3.stackSize += var2.stackSize;
        par1EntityItem.delayBeforeCanPickup = Math.max(par1EntityItem.delayBeforeCanPickup, this.delayBeforeCanPickup);
        par1EntityItem.age = Math.min(par1EntityItem.age, this.age);
        par1EntityItem.setEntityItemStack(var3);
        this.setDead();
        return true;
      }
    } else {
      return false;
    }
  }

  /**
   * sets the age of the item so that it'll despawn one minute after it has been dropped (instead of five). Used when
   * items are dropped from players in creative mode
   */
  public void setAgeToCreativeDespawnTime() {
    this.age = 4800;
  }

  /**
   * Returns if this entity is in water and will end up adding the waters velocity to the entity
   */
  public boolean handleWaterMovement() {
    return this.worldObj.handleMaterialAcceleration(this.boundingBox, Material.water, this);
  }

  /**
   * Will deal the specified amount of damage to the entity if the entity isn't immune to fire damage. Args: amountDamage
   */
  protected void dealFireDamage(int par1) {
    this.attackEntityFrom(DamageSource.inFire, (float)par1);
  }

  /**
   * Called when the entity is attacked.
   */
  public boolean attackEntityFrom(DamageSource par1DamageSource, float par2) {
    if (this.isEntityInvulnerable()) {
      return false;
    } else if (this.getEntityItem() != null && this.getEntityItem().itemID == Item.netherStar.itemID && par1DamageSource.isExplosion()) {
      return false;
    } else {
      this.setBeenAttacked();
      this.health = (int)((float)this.health - par2);

      if (this.health <= 0) {
        this.setDead();
      }

      return false;
    }
  }

  /**
   * (abstract) Protected helper method to write subclass entity data to NBT.
   */
  public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound) {
    par1NBTTagCompound.setShort("Health", (short)((byte)this.health));
    par1NBTTagCompound.setShort("Age", (short)this.age);

    if (this.getEntityItem() != null) {
      par1NBTTagCompound.setCompoundTag("Item", this.getEntityItem().writeToNBT(new NBTTagCompound()));
    }
  }

  /**
   * (abstract) Protected helper method to read subclass entity data from NBT.
   */
  public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound) {
    this.health = par1NBTTagCompound.getShort("Health") & 255;
    this.age = par1NBTTagCompound.getShort("Age");
    NBTTagCompound var2 = par1NBTTagCompound.getCompoundTag("Item");
    this.setEntityItemStack(ItemStack.loadItemStackFromNBT(var2));

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

  /**
   * Called by a player entity when they collide with an entity
   */
  public void onCollideWithPlayer(EntityPlayer par1EntityPlayer) {
    if (!this.worldObj.isRemote) {
      ItemStack var2 = this.getEntityItem();
      int var3 = var2.stackSize;

      if (this.delayBeforeCanPickup == 0 && par1EntityPlayer.inventory.addItemStackToInventory(var2)) {
        if (var2.itemID == Block.wood.blockID) {
          par1EntityPlayer.triggerAchievement(AchievementList.mineWood);
        }

        if (var2.itemID == Item.leather.itemID) {
          par1EntityPlayer.triggerAchievement(AchievementList.killCow);
        }

        if (var2.itemID == Item.diamond.itemID) {
          par1EntityPlayer.triggerAchievement(AchievementList.diamonds);
        }

        if (var2.itemID == Item.blazeRod.itemID) {
          par1EntityPlayer.triggerAchievement(AchievementList.blazeRod);
        }

        this.playSound("random.pop", 0.2F, ((this.rand.nextFloat() - this.rand.nextFloat()) * 0.7F + 1.0F) * 2.0F);
        par1EntityPlayer.onItemPickup(this, var3);

        if (var2.stackSize <= 0) {
          this.setDead();
        }
      }
    }
  }

  /**
   * Gets the username of the entity.
   */
  public String getEntityName() {
    return StatCollector.translateToLocal("item." + this.getEntityItem().getUnlocalizedName());
  }

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

  /**
   * Teleports the entity to another dimension. Params: Dimension number to teleport to
   */
  public void travelToDimension(int par1) {
    super.travelToDimension(par1);

    if (!this.worldObj.isRemote) {
      this.searchForOtherItemsNearby();
    }
  }

  /**
   * Returns the ItemStack corresponding to the Entity (Note: if no item exists, will log an error but still return an
   * ItemStack containing Block.stone)
   */
  public ItemStack getEntityItem() {
    ItemStack var1 = this.getDataWatcher().getWatchableObjectItemStack(10);

    if (var1 == null) {
      if (this.worldObj != null) {
        this.worldObj.getWorldLogAgent().logSevere("Item entity " + this.entityId + " has no item?!");
      }

      return new ItemStack(Block.stone);
    } else {
      return var1;
    }
  }

  /**
   * Sets the ItemStack for this entity
   */
  public void setEntityItemStack(ItemStack par1ItemStack) {
    this.getDataWatcher().updateObject(10, par1ItemStack);
    this.getDataWatcher().setObjectWatched(10);
  }
}
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