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