001 package net.minecraft.src; 002 003 import cpw.mods.fml.common.Side; 004 import cpw.mods.fml.common.asm.SideOnly; 005 006 public class EntityXPOrb extends Entity 007 { 008 /** 009 * A constantly increasing value that RenderXPOrb uses to control the colour shifting (Green / yellow) 010 */ 011 public int xpColor; 012 013 /** The age of the XP orb in ticks. */ 014 public int xpOrbAge = 0; 015 public int field_70532_c; 016 017 /** The health of this XP orb. */ 018 private int xpOrbHealth = 5; 019 020 /** This is how much XP this orb has. */ 021 private int xpValue; 022 023 /** The closest EntityPlayer to this orb. */ 024 private EntityPlayer closestPlayer; 025 private int field_80002_g; 026 027 public EntityXPOrb(World par1World, double par2, double par4, double par6, int par8) 028 { 029 super(par1World); 030 this.setSize(0.5F, 0.5F); 031 this.yOffset = this.height / 2.0F; 032 this.setPosition(par2, par4, par6); 033 this.rotationYaw = (float)(Math.random() * 360.0D); 034 this.motionX = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D) * 2.0F); 035 this.motionY = (double)((float)(Math.random() * 0.2D) * 2.0F); 036 this.motionZ = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D) * 2.0F); 037 this.xpValue = par8; 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 EntityXPOrb(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 @SideOnly(Side.CLIENT) 059 public int getBrightnessForRender(float par1) 060 { 061 float var2 = 0.5F; 062 063 if (var2 < 0.0F) 064 { 065 var2 = 0.0F; 066 } 067 068 if (var2 > 1.0F) 069 { 070 var2 = 1.0F; 071 } 072 073 int var3 = super.getBrightnessForRender(par1); 074 int var4 = var3 & 255; 075 int var5 = var3 >> 16 & 255; 076 var4 += (int)(var2 * 15.0F * 16.0F); 077 078 if (var4 > 240) 079 { 080 var4 = 240; 081 } 082 083 return var4 | var5 << 16; 084 } 085 086 /** 087 * Called to update the entity's position/logic. 088 */ 089 public void onUpdate() 090 { 091 super.onUpdate(); 092 093 if (this.field_70532_c > 0) 094 { 095 --this.field_70532_c; 096 } 097 098 this.prevPosX = this.posX; 099 this.prevPosY = this.posY; 100 this.prevPosZ = this.posZ; 101 this.motionY -= 0.029999999329447746D; 102 103 if (this.worldObj.getBlockMaterial(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.posY), MathHelper.floor_double(this.posZ)) == Material.lava) 104 { 105 this.motionY = 0.20000000298023224D; 106 this.motionX = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F); 107 this.motionZ = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F); 108 this.worldObj.playSoundAtEntity(this, "random.fizz", 0.4F, 2.0F + this.rand.nextFloat() * 0.4F); 109 } 110 111 this.pushOutOfBlocks(this.posX, (this.boundingBox.minY + this.boundingBox.maxY) / 2.0D, this.posZ); 112 double var1 = 8.0D; 113 114 if (this.field_80002_g < this.xpColor - 20 + this.entityId % 100) 115 { 116 if (this.closestPlayer == null || this.closestPlayer.getDistanceSqToEntity(this) > var1 * var1) 117 { 118 this.closestPlayer = this.worldObj.getClosestPlayerToEntity(this, var1); 119 } 120 121 this.field_80002_g = this.xpColor; 122 } 123 124 if (this.closestPlayer != null) 125 { 126 double var3 = (this.closestPlayer.posX - this.posX) / var1; 127 double var5 = (this.closestPlayer.posY + (double)this.closestPlayer.getEyeHeight() - this.posY) / var1; 128 double var7 = (this.closestPlayer.posZ - this.posZ) / var1; 129 double var9 = Math.sqrt(var3 * var3 + var5 * var5 + var7 * var7); 130 double var11 = 1.0D - var9; 131 132 if (var11 > 0.0D) 133 { 134 var11 *= var11; 135 this.motionX += var3 / var9 * var11 * 0.1D; 136 this.motionY += var5 / var9 * var11 * 0.1D; 137 this.motionZ += var7 / var9 * var11 * 0.1D; 138 } 139 } 140 141 this.moveEntity(this.motionX, this.motionY, this.motionZ); 142 float var13 = 0.98F; 143 144 if (this.onGround) 145 { 146 var13 = 0.58800006F; 147 int var4 = this.worldObj.getBlockId(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.boundingBox.minY) - 1, MathHelper.floor_double(this.posZ)); 148 149 if (var4 > 0) 150 { 151 var13 = Block.blocksList[var4].slipperiness * 0.98F; 152 } 153 } 154 155 this.motionX *= (double)var13; 156 this.motionY *= 0.9800000190734863D; 157 this.motionZ *= (double)var13; 158 159 if (this.onGround) 160 { 161 this.motionY *= -0.8999999761581421D; 162 } 163 164 ++this.xpColor; 165 ++this.xpOrbAge; 166 167 if (this.xpOrbAge >= 6000) 168 { 169 this.setDead(); 170 } 171 } 172 173 /** 174 * Returns if this entity is in water and will end up adding the waters velocity to the entity 175 */ 176 public boolean handleWaterMovement() 177 { 178 return this.worldObj.handleMaterialAcceleration(this.boundingBox, Material.water, this); 179 } 180 181 /** 182 * Will deal the specified amount of damage to the entity if the entity isn't immune to fire damage. Args: 183 * amountDamage 184 */ 185 protected void dealFireDamage(int par1) 186 { 187 this.attackEntityFrom(DamageSource.inFire, par1); 188 } 189 190 /** 191 * Called when the entity is attacked. 192 */ 193 public boolean attackEntityFrom(DamageSource par1DamageSource, int par2) 194 { 195 this.setBeenAttacked(); 196 this.xpOrbHealth -= par2; 197 198 if (this.xpOrbHealth <= 0) 199 { 200 this.setDead(); 201 } 202 203 return false; 204 } 205 206 /** 207 * (abstract) Protected helper method to write subclass entity data to NBT. 208 */ 209 public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound) 210 { 211 par1NBTTagCompound.setShort("Health", (short)((byte)this.xpOrbHealth)); 212 par1NBTTagCompound.setShort("Age", (short)this.xpOrbAge); 213 par1NBTTagCompound.setShort("Value", (short)this.xpValue); 214 } 215 216 /** 217 * (abstract) Protected helper method to read subclass entity data from NBT. 218 */ 219 public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound) 220 { 221 this.xpOrbHealth = par1NBTTagCompound.getShort("Health") & 255; 222 this.xpOrbAge = par1NBTTagCompound.getShort("Age"); 223 this.xpValue = par1NBTTagCompound.getShort("Value"); 224 } 225 226 /** 227 * Called by a player entity when they collide with an entity 228 */ 229 public void onCollideWithPlayer(EntityPlayer par1EntityPlayer) 230 { 231 if (!this.worldObj.isRemote) 232 { 233 if (this.field_70532_c == 0 && par1EntityPlayer.xpCooldown == 0) 234 { 235 par1EntityPlayer.xpCooldown = 2; 236 this.worldObj.playSoundAtEntity(this, "random.orb", 0.1F, 0.5F * ((this.rand.nextFloat() - this.rand.nextFloat()) * 0.7F + 1.8F)); 237 par1EntityPlayer.onItemPickup(this, 1); 238 par1EntityPlayer.addExperience(this.xpValue); 239 this.setDead(); 240 } 241 } 242 } 243 244 /** 245 * Returns the XP value of this XP orb. 246 */ 247 public int getXpValue() 248 { 249 return this.xpValue; 250 } 251 252 @SideOnly(Side.CLIENT) 253 254 /** 255 * Returns a number from 1 to 10 based on how much XP this orb is worth. This is used by RenderXPOrb to determine 256 * what texture to use. 257 */ 258 public int getTextureByXP() 259 { 260 return this.xpValue >= 2477 ? 10 : (this.xpValue >= 1237 ? 9 : (this.xpValue >= 617 ? 8 : (this.xpValue >= 307 ? 7 : (this.xpValue >= 149 ? 6 : (this.xpValue >= 73 ? 5 : (this.xpValue >= 37 ? 4 : (this.xpValue >= 17 ? 3 : (this.xpValue >= 7 ? 2 : (this.xpValue >= 3 ? 1 : 0))))))))); 261 } 262 263 /** 264 * Get xp split rate (Is called until the xp drop code in EntityLiving.onEntityUpdate is complete) 265 */ 266 public static int getXPSplit(int par0) 267 { 268 return par0 >= 2477 ? 2477 : (par0 >= 1237 ? 1237 : (par0 >= 617 ? 617 : (par0 >= 307 ? 307 : (par0 >= 149 ? 149 : (par0 >= 73 ? 73 : (par0 >= 37 ? 37 : (par0 >= 17 ? 17 : (par0 >= 7 ? 7 : (par0 >= 3 ? 3 : 1))))))))); 269 } 270 271 /** 272 * If returns false, the item will not inflict any damage against entities. 273 */ 274 public boolean canAttackWithItem() 275 { 276 return false; 277 } 278 }