    001    package net.minecraft.src;
    002
    003    import java.util.Iterator;
    004
    005    import net.minecraftforge.common.MinecraftForge;
    006    import net.minecraftforge.event.Event.Result;
    007    import net.minecraftforge.event.entity.item.ItemExpireEvent;
    008    import net.minecraftforge.event.entity.player.EntityItemPickupEvent;
    009
    010    import cpw.mods.fml.common.registry.GameRegistry;
    011
    012    public class EntityItem extends Entity
    013    {
    014        /** The item stack of this EntityItem. */
    015        public ItemStack item;
    016
    017        /**
    018         * The age of this EntityItem (used to animate it up and down as well as expire it)
    019         */
    020        public int age = 0;
    021        public int delayBeforeCanPickup;
    022
    023        /** The health of this EntityItem. (For example, damage for tools) */
    024        private int health = 5;
    025
    026        /** The EntityItem's random initial float height. */
    027        public float hoverStart = (float)(Math.random() * Math.PI * 2.0D);
    028
    029        /**
    030         * The maximum age of this EntityItem.  The item is expired once this is reached.
    031         */
    032        public int lifespan = 6000;
    033
    034        public EntityItem(World par1World, double par2, double par4, double par6, ItemStack par8ItemStack)
    035        {
    036            super(par1World);
    037            this.setSize(0.25F, 0.25F);
    038            this.yOffset = this.height / 2.0F;
    039            this.setPosition(par2, par4, par6);
    040            this.item = par8ItemStack;
    041            this.rotationYaw = (float)(Math.random() * 360.0D);
    042            this.motionX = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D));
    043            this.motionY = 0.20000000298023224D;
    044            this.motionZ = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D));
    045            this.lifespan = (par8ItemStack.getItem() == null ? 6000 : par8ItemStack.getItem().getEntityLifespan(par8ItemStack, par1World));
    046        }
    047
    048        /**
    049         * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
    050         * prevent them from trampling crops
    051         */
    052        protected boolean canTriggerWalking()
    053        {
    054            return false;
    055        }
    056
    057        public EntityItem(World par1World)
    058        {
    059            super(par1World);
    060            this.setSize(0.25F, 0.25F);
    061            this.yOffset = this.height / 2.0F;
    062        }
    063
    064        protected void entityInit() {}
    065
    066        /**
    067         * Called to update the entity's position/logic.
    068         */
    069        public void onUpdate()
    070        {
    071            super.onUpdate();
    072
    073            if (this.delayBeforeCanPickup > 0)
    074            {
    075                --this.delayBeforeCanPickup;
    076            }
    077
    078            this.prevPosX = this.posX;
    079            this.prevPosY = this.posY;
    080            this.prevPosZ = this.posZ;
    081            this.motionY -= 0.03999999910593033D;
    082            this.pushOutOfBlocks(this.posX, (this.boundingBox.minY + this.boundingBox.maxY) / 2.0D, this.posZ);
    083            this.moveEntity(this.motionX, this.motionY, this.motionZ);
    084            boolean var1 = (int)this.prevPosX != (int)this.posX || (int)this.prevPosY != (int)this.posY || (int)this.prevPosZ != (int)this.posZ;
    085
    086            if (var1)
    087            {
    088                if (this.worldObj.getBlockMaterial(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.posY), MathHelper.floor_double(this.posZ)) == Material.lava)
    089                {
    090                    this.motionY = 0.20000000298023224D;
    091                    this.motionX = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F);
    092                    this.motionZ = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F);
    093                    this.worldObj.playSoundAtEntity(this, "random.fizz", 0.4F, 2.0F + this.rand.nextFloat() * 0.4F);
    094                }
    095
    096                if (!this.worldObj.isRemote)
    097                {
    098                    Iterator var2 = this.worldObj.getEntitiesWithinAABB(EntityItem.class, this.boundingBox.expand(0.5D, 0.0D, 0.5D)).iterator();
    099
    100                    while (var2.hasNext())
    101                    {
    102                        EntityItem var3 = (EntityItem)var2.next();
    103                        this.func_70289_a(var3);
    104                    }
    105                }
    106            }
    107
    108            float var4 = 0.98F;
    109
    110            if (this.onGround)
    111            {
    112                var4 = 0.58800006F;
    113                int var5 = this.worldObj.getBlockId(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.boundingBox.minY) - 1, MathHelper.floor_double(this.posZ));
    114
    115                if (var5 > 0)
    116                {
    117                    var4 = Block.blocksList[var5].slipperiness * 0.98F;
    118                }
    119            }
    120
    121            this.motionX *= (double)var4;
    122            this.motionY *= 0.9800000190734863D;
    123            this.motionZ *= (double)var4;
    124
    125            if (this.onGround)
    126            {
    127                this.motionY *= -0.5D;
    128            }
    129
    130            ++this.age;
    131
    132            if (!this.worldObj.isRemote && this.age >= lifespan)
    133            {
    134                ItemExpireEvent event = new ItemExpireEvent(this, (item.getItem() == null ? 6000 : item.getItem().getEntityLifespan(item, worldObj)));
    135                if (MinecraftForge.EVENT_BUS.post(event))
    136                {
    137                    lifespan += event.extraLife;
    138                }
    139                else
    140                {
    141                    this.setDead();
    142                }
    143            }
    144
    145            if (this.item == null || this.item.stackSize <= 0)
    146            {
    147                this.setDead();
    148            }
    149        }
    150
    151        public boolean func_70289_a(EntityItem par1EntityItem)
    152        {
    153            if (par1EntityItem == this)
    154            {
    155                return false;
    156            }
    157            else if (par1EntityItem.isEntityAlive() && this.isEntityAlive())
    158            {
    159                if (par1EntityItem.item.getItem() != this.item.getItem())
    160                {
    161                    return false;
    162                }
    163                else if (!par1EntityItem.item.hasTagCompound() && !this.item.hasTagCompound())
    164                {
    165                    if (par1EntityItem.item.getItem().getHasSubtypes() && par1EntityItem.item.getItemDamage() != this.item.getItemDamage())
    166                    {
    167                        return false;
    168                    }
    169                    else if (par1EntityItem.item.stackSize < this.item.stackSize)
    170                    {
    171                        return par1EntityItem.func_70289_a(this);
    172                    }
    173                    else if (par1EntityItem.item.stackSize + this.item.stackSize > par1EntityItem.item.getMaxStackSize())
    174                    {
    175                        return false;
    176                    }
    177                    else
    178                    {
    179                        par1EntityItem.item.stackSize += this.item.stackSize;
    180                        par1EntityItem.delayBeforeCanPickup = Math.max(par1EntityItem.delayBeforeCanPickup, this.delayBeforeCanPickup);
    181                        par1EntityItem.age = Math.min(par1EntityItem.age, this.age);
    182                        this.setDead();
    183                        return true;
    184                    }
    185                }
    186                else
    187                {
    188                    return false;
    189                }
    190            }
    191            else
    192            {
    193                return false;
    194            }
    195        }
    196
    197        public void func_70288_d()
    198        {
    199            this.age = 4800;
    200        }
    201
    202        /**
    203         * Returns if this entity is in water and will end up adding the waters velocity to the entity
    204         */
    205        public boolean handleWaterMovement()
    206        {
    207            return this.worldObj.handleMaterialAcceleration(this.boundingBox, Material.water, this);
    208        }
    209
    210        /**
    211         * Will deal the specified amount of damage to the entity if the entity isn't immune to fire damage. Args:
    212         * amountDamage
    213         */
    214        protected void dealFireDamage(int par1)
    215        {
    216            this.attackEntityFrom(DamageSource.inFire, par1);
    217        }
    218
    219        /**
    220         * Called when the entity is attacked.
    221         */
    222        public boolean attackEntityFrom(DamageSource par1DamageSource, int par2)
    223        {
    224            this.setBeenAttacked();
    225            this.health -= par2;
    226
    227            if (this.health <= 0)
    228            {
    229                this.setDead();
    230            }
    231
    232            return false;
    233        }
    234
    235        /**
    236         * (abstract) Protected helper method to write subclass entity data to NBT.
    237         */
    238        public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
    239        {
    240            par1NBTTagCompound.setShort("Health", (short)((byte)this.health));
    241            par1NBTTagCompound.setShort("Age", (short)this.age);
    242            par1NBTTagCompound.setInteger("Lifespan", lifespan);
    243
    244            if (this.item != null)
    245            {
    246                par1NBTTagCompound.setCompoundTag("Item", this.item.writeToNBT(new NBTTagCompound()));
    247            }
    248        }
    249
    250        /**
    251         * (abstract) Protected helper method to read subclass entity data from NBT.
    252         */
    253        public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
    254        {
    255            this.health = par1NBTTagCompound.getShort("Health") & 255;
    256            this.age = par1NBTTagCompound.getShort("Age");
    257            NBTTagCompound var2 = par1NBTTagCompound.getCompoundTag("Item");
    258            this.item = ItemStack.loadItemStackFromNBT(var2);
    259
    260            if (this.item == null || this.item.stackSize <= 0)
    261            {
    262                this.setDead();
    263            }
    264
    265            if (par1NBTTagCompound.hasKey("Lifespan"))
    266            {
    267                lifespan = par1NBTTagCompound.getInteger("Lifespan");
    268            }
    269        }
    270
    271        /**
    272         * Called by a player entity when they collide with an entity
    273         */
    274        public void onCollideWithPlayer(EntityPlayer par1EntityPlayer)
    275        {
    276            if (!this.worldObj.isRemote)
    277            {
    278                if (this.delayBeforeCanPickup > 0)
    279                {
    280                    return;
    281                }
    282
    283                EntityItemPickupEvent event = new EntityItemPickupEvent(par1EntityPlayer, this);
    284
    285                if (MinecraftForge.EVENT_BUS.post(event))
    286                {
    287                    return;
    288                }
    289
    290                int var2 = this.item.stackSize;
    291
    292                if (this.delayBeforeCanPickup <= 0 && (event.getResult() == Result.ALLOW || var2 <= 0 || par1EntityPlayer.inventory.addItemStackToInventory(this.item)))
    293                {
    294                    if (this.item.itemID == Block.wood.blockID)
    295                    {
    296                        par1EntityPlayer.triggerAchievement(AchievementList.mineWood);
    297                    }
    298
    299                    if (this.item.itemID == Item.leather.shiftedIndex)
    300                    {
    301                        par1EntityPlayer.triggerAchievement(AchievementList.killCow);
    302                    }
    303
    304                    if (this.item.itemID == Item.diamond.shiftedIndex)
    305                    {
    306                        par1EntityPlayer.triggerAchievement(AchievementList.diamonds);
    307                    }
    308
    309                    if (this.item.itemID == Item.blazeRod.shiftedIndex)
    310                    {
    311                        par1EntityPlayer.triggerAchievement(AchievementList.blazeRod);
    312                    }
    313
    314                    GameRegistry.onPickupNotification(par1EntityPlayer, this);
    315
    316                    this.worldObj.playSoundAtEntity(this, "random.pop", 0.2F, ((this.rand.nextFloat() - this.rand.nextFloat()) * 0.7F + 1.0F) * 2.0F);
    317                    par1EntityPlayer.onItemPickup(this, var2);
    318
    319                    if (this.item.stackSize <= 0)
    320                    {
    321                        this.setDead();
    322                    }
    323                }
    324            }
    325        }
    326
    327        /**
    328         * Gets the username of the entity.
    329         */
    330        public String getEntityName()
    331        {
    332            return StatCollector.translateToLocal("item." + this.item.getItemName());
    333        }
    334
    335        /**
    336         * If returns false, the item will not inflict any damage against entities.
    337         */
    338        public boolean canAttackWithItem()
    339        {
    340            return false;
    341        }
    342    }