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