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 private EntityPlayer field_80001_f; 023 private int field_80002_g; 024 025 public EntityXPOrb(World par1World, double par2, double par4, double par6, int par8) 026 { 027 super(par1World); 028 this.setSize(0.5F, 0.5F); 029 this.yOffset = this.height / 2.0F; 030 this.setPosition(par2, par4, par6); 031 this.rotationYaw = (float)(Math.random() * 360.0D); 032 this.motionX = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D) * 2.0F); 033 this.motionY = (double)((float)(Math.random() * 0.2D) * 2.0F); 034 this.motionZ = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D) * 2.0F); 035 this.xpValue = par8; 036 } 037 038 /** 039 * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to 040 * prevent them from trampling crops 041 */ 042 protected boolean canTriggerWalking() 043 { 044 return false; 045 } 046 047 public EntityXPOrb(World par1World) 048 { 049 super(par1World); 050 this.setSize(0.25F, 0.25F); 051 this.yOffset = this.height / 2.0F; 052 } 053 054 protected void entityInit() {} 055 056 @SideOnly(Side.CLIENT) 057 public int getBrightnessForRender(float par1) 058 { 059 float var2 = 0.5F; 060 061 if (var2 < 0.0F) 062 { 063 var2 = 0.0F; 064 } 065 066 if (var2 > 1.0F) 067 { 068 var2 = 1.0F; 069 } 070 071 int var3 = super.getBrightnessForRender(par1); 072 int var4 = var3 & 255; 073 int var5 = var3 >> 16 & 255; 074 var4 += (int)(var2 * 15.0F * 16.0F); 075 076 if (var4 > 240) 077 { 078 var4 = 240; 079 } 080 081 return var4 | var5 << 16; 082 } 083 084 /** 085 * Called to update the entity's position/logic. 086 */ 087 public void onUpdate() 088 { 089 super.onUpdate(); 090 091 if (this.field_70532_c > 0) 092 { 093 --this.field_70532_c; 094 } 095 096 this.prevPosX = this.posX; 097 this.prevPosY = this.posY; 098 this.prevPosZ = this.posZ; 099 this.motionY -= 0.029999999329447746D; 100 101 if (this.worldObj.getBlockMaterial(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.posY), MathHelper.floor_double(this.posZ)) == Material.lava) 102 { 103 this.motionY = 0.20000000298023224D; 104 this.motionX = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F); 105 this.motionZ = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F); 106 this.worldObj.playSoundAtEntity(this, "random.fizz", 0.4F, 2.0F + this.rand.nextFloat() * 0.4F); 107 } 108 109 this.pushOutOfBlocks(this.posX, (this.boundingBox.minY + this.boundingBox.maxY) / 2.0D, this.posZ); 110 double var1 = 8.0D; 111 112 if (this.field_80002_g < this.xpColor - 20 + this.entityId % 100) 113 { 114 if (this.field_80001_f == null || this.field_80001_f.getDistanceSqToEntity(this) > var1 * var1) 115 { 116 this.field_80001_f = this.worldObj.getClosestPlayerToEntity(this, var1); 117 } 118 119 this.field_80002_g = this.xpColor; 120 } 121 122 if (this.field_80001_f != null) 123 { 124 double var3 = (this.field_80001_f.posX - this.posX) / var1; 125 double var5 = (this.field_80001_f.posY + (double)this.field_80001_f.getEyeHeight() - this.posY) / var1; 126 double var7 = (this.field_80001_f.posZ - this.posZ) / var1; 127 double var9 = Math.sqrt(var3 * var3 + var5 * var5 + var7 * var7); 128 double var11 = 1.0D - var9; 129 130 if (var11 > 0.0D) 131 { 132 var11 *= var11; 133 this.motionX += var3 / var9 * var11 * 0.1D; 134 this.motionY += var5 / var9 * var11 * 0.1D; 135 this.motionZ += var7 / var9 * var11 * 0.1D; 136 } 137 } 138 139 this.moveEntity(this.motionX, this.motionY, this.motionZ); 140 float var13 = 0.98F; 141 142 if (this.onGround) 143 { 144 var13 = 0.58800006F; 145 int var4 = this.worldObj.getBlockId(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.boundingBox.minY) - 1, MathHelper.floor_double(this.posZ)); 146 147 if (var4 > 0) 148 { 149 var13 = Block.blocksList[var4].slipperiness * 0.98F; 150 } 151 } 152 153 this.motionX *= (double)var13; 154 this.motionY *= 0.9800000190734863D; 155 this.motionZ *= (double)var13; 156 157 if (this.onGround) 158 { 159 this.motionY *= -0.8999999761581421D; 160 } 161 162 ++this.xpColor; 163 ++this.xpOrbAge; 164 165 if (this.xpOrbAge >= 6000) 166 { 167 this.setDead(); 168 } 169 } 170 171 /** 172 * Returns if this entity is in water and will end up adding the waters velocity to the entity 173 */ 174 public boolean handleWaterMovement() 175 { 176 return this.worldObj.handleMaterialAcceleration(this.boundingBox, Material.water, this); 177 } 178 179 /** 180 * Will deal the specified amount of damage to the entity if the entity isn't immune to fire damage. Args: 181 * amountDamage 182 */ 183 protected void dealFireDamage(int par1) 184 { 185 this.attackEntityFrom(DamageSource.inFire, par1); 186 } 187 188 /** 189 * Called when the entity is attacked. 190 */ 191 public boolean attackEntityFrom(DamageSource par1DamageSource, int par2) 192 { 193 this.setBeenAttacked(); 194 this.xpOrbHealth -= par2; 195 196 if (this.xpOrbHealth <= 0) 197 { 198 this.setDead(); 199 } 200 201 return false; 202 } 203 204 /** 205 * (abstract) Protected helper method to write subclass entity data to NBT. 206 */ 207 public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound) 208 { 209 par1NBTTagCompound.setShort("Health", (short)((byte)this.xpOrbHealth)); 210 par1NBTTagCompound.setShort("Age", (short)this.xpOrbAge); 211 par1NBTTagCompound.setShort("Value", (short)this.xpValue); 212 } 213 214 /** 215 * (abstract) Protected helper method to read subclass entity data from NBT. 216 */ 217 public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound) 218 { 219 this.xpOrbHealth = par1NBTTagCompound.getShort("Health") & 255; 220 this.xpOrbAge = par1NBTTagCompound.getShort("Age"); 221 this.xpValue = par1NBTTagCompound.getShort("Value"); 222 } 223 224 /** 225 * Called by a player entity when they collide with an entity 226 */ 227 public void onCollideWithPlayer(EntityPlayer par1EntityPlayer) 228 { 229 if (!this.worldObj.isRemote) 230 { 231 if (this.field_70532_c == 0 && par1EntityPlayer.xpCooldown == 0) 232 { 233 par1EntityPlayer.xpCooldown = 2; 234 this.worldObj.playSoundAtEntity(this, "random.orb", 0.1F, 0.5F * ((this.rand.nextFloat() - this.rand.nextFloat()) * 0.7F + 1.8F)); 235 par1EntityPlayer.onItemPickup(this, 1); 236 par1EntityPlayer.addExperience(this.xpValue); 237 this.setDead(); 238 } 239 } 240 } 241 242 /** 243 * Returns the XP value of this XP orb. 244 */ 245 public int getXpValue() 246 { 247 return this.xpValue; 248 } 249 250 @SideOnly(Side.CLIENT) 251 252 /** 253 * Returns a number from 1 to 10 based on how much XP this orb is worth. This is used by RenderXPOrb to determine 254 * what texture to use. 255 */ 256 public int getTextureByXP() 257 { 258 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))))))))); 259 } 260 261 /** 262 * Get xp split rate (Is called until the xp drop code in EntityLiving.onEntityUpdate is complete) 263 */ 264 public static int getXPSplit(int par0) 265 { 266 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))))))))); 267 } 268 269 /** 270 * If returns false, the item will not inflict any damage against entities. 271 */ 272 public boolean canAttackWithItem() 273 { 274 return false; 275 } 276 }