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 }