001 package net.minecraft.entity.item;
002
003 import cpw.mods.fml.relauncher.Side;
004 import cpw.mods.fml.relauncher.SideOnly;
005 import net.minecraft.block.Block;
006 import net.minecraft.block.material.Material;
007 import net.minecraft.entity.Entity;
008 import net.minecraft.entity.player.EntityPlayer;
009 import net.minecraft.nbt.NBTTagCompound;
010 import net.minecraft.util.DamageSource;
011 import net.minecraft.util.MathHelper;
012 import net.minecraft.world.World;
013
014 public class EntityXPOrb extends Entity
015 {
016 /**
017 * A constantly increasing value that RenderXPOrb uses to control the colour shifting (Green / yellow)
018 */
019 public int xpColor;
020
021 /** The age of the XP orb in ticks. */
022 public int xpOrbAge = 0;
023 public int field_70532_c;
024
025 /** The health of this XP orb. */
026 private int xpOrbHealth = 5;
027
028 /** This is how much XP this orb has. */
029 private int xpValue;
030
031 /** The closest EntityPlayer to this orb. */
032 private EntityPlayer closestPlayer;
033
034 /** Threshold color for tracking players */
035 private int xpTargetColor;
036
037 public EntityXPOrb(World par1World, double par2, double par4, double par6, int par8)
038 {
039 super(par1World);
040 this.setSize(0.5F, 0.5F);
041 this.yOffset = this.height / 2.0F;
042 this.setPosition(par2, par4, par6);
043 this.rotationYaw = (float)(Math.random() * 360.0D);
044 this.motionX = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D) * 2.0F);
045 this.motionY = (double)((float)(Math.random() * 0.2D) * 2.0F);
046 this.motionZ = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D) * 2.0F);
047 this.xpValue = par8;
048 }
049
050 /**
051 * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
052 * prevent them from trampling crops
053 */
054 protected boolean canTriggerWalking()
055 {
056 return false;
057 }
058
059 public EntityXPOrb(World par1World)
060 {
061 super(par1World);
062 this.setSize(0.25F, 0.25F);
063 this.yOffset = this.height / 2.0F;
064 }
065
066 protected void entityInit() {}
067
068 @SideOnly(Side.CLIENT)
069 public int getBrightnessForRender(float par1)
070 {
071 float var2 = 0.5F;
072
073 if (var2 < 0.0F)
074 {
075 var2 = 0.0F;
076 }
077
078 if (var2 > 1.0F)
079 {
080 var2 = 1.0F;
081 }
082
083 int var3 = super.getBrightnessForRender(par1);
084 int var4 = var3 & 255;
085 int var5 = var3 >> 16 & 255;
086 var4 += (int)(var2 * 15.0F * 16.0F);
087
088 if (var4 > 240)
089 {
090 var4 = 240;
091 }
092
093 return var4 | var5 << 16;
094 }
095
096 /**
097 * Called to update the entity's position/logic.
098 */
099 public void onUpdate()
100 {
101 super.onUpdate();
102
103 if (this.field_70532_c > 0)
104 {
105 --this.field_70532_c;
106 }
107
108 this.prevPosX = this.posX;
109 this.prevPosY = this.posY;
110 this.prevPosZ = this.posZ;
111 this.motionY -= 0.029999999329447746D;
112
113 if (this.worldObj.getBlockMaterial(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.posY), MathHelper.floor_double(this.posZ)) == Material.lava)
114 {
115 this.motionY = 0.20000000298023224D;
116 this.motionX = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F);
117 this.motionZ = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F);
118 this.playSound("random.fizz", 0.4F, 2.0F + this.rand.nextFloat() * 0.4F);
119 }
120
121 this.pushOutOfBlocks(this.posX, (this.boundingBox.minY + this.boundingBox.maxY) / 2.0D, this.posZ);
122 double var1 = 8.0D;
123
124 if (this.xpTargetColor < this.xpColor - 20 + this.entityId % 100)
125 {
126 if (this.closestPlayer == null || this.closestPlayer.getDistanceSqToEntity(this) > var1 * var1)
127 {
128 this.closestPlayer = this.worldObj.getClosestPlayerToEntity(this, var1);
129 }
130
131 this.xpTargetColor = this.xpColor;
132 }
133
134 if (this.closestPlayer != null)
135 {
136 double var3 = (this.closestPlayer.posX - this.posX) / var1;
137 double var5 = (this.closestPlayer.posY + (double)this.closestPlayer.getEyeHeight() - this.posY) / var1;
138 double var7 = (this.closestPlayer.posZ - this.posZ) / var1;
139 double var9 = Math.sqrt(var3 * var3 + var5 * var5 + var7 * var7);
140 double var11 = 1.0D - var9;
141
142 if (var11 > 0.0D)
143 {
144 var11 *= var11;
145 this.motionX += var3 / var9 * var11 * 0.1D;
146 this.motionY += var5 / var9 * var11 * 0.1D;
147 this.motionZ += var7 / var9 * var11 * 0.1D;
148 }
149 }
150
151 this.moveEntity(this.motionX, this.motionY, this.motionZ);
152 float var13 = 0.98F;
153
154 if (this.onGround)
155 {
156 var13 = 0.58800006F;
157 int var4 = this.worldObj.getBlockId(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.boundingBox.minY) - 1, MathHelper.floor_double(this.posZ));
158
159 if (var4 > 0)
160 {
161 var13 = Block.blocksList[var4].slipperiness * 0.98F;
162 }
163 }
164
165 this.motionX *= (double)var13;
166 this.motionY *= 0.9800000190734863D;
167 this.motionZ *= (double)var13;
168
169 if (this.onGround)
170 {
171 this.motionY *= -0.8999999761581421D;
172 }
173
174 ++this.xpColor;
175 ++this.xpOrbAge;
176
177 if (this.xpOrbAge >= 6000)
178 {
179 this.setDead();
180 }
181 }
182
183 /**
184 * Returns if this entity is in water and will end up adding the waters velocity to the entity
185 */
186 public boolean handleWaterMovement()
187 {
188 return this.worldObj.handleMaterialAcceleration(this.boundingBox, Material.water, this);
189 }
190
191 /**
192 * Will deal the specified amount of damage to the entity if the entity isn't immune to fire damage. Args:
193 * amountDamage
194 */
195 protected void dealFireDamage(int par1)
196 {
197 this.attackEntityFrom(DamageSource.inFire, par1);
198 }
199
200 /**
201 * Called when the entity is attacked.
202 */
203 public boolean attackEntityFrom(DamageSource par1DamageSource, int par2)
204 {
205 if (this.isEntityInvulnerable())
206 {
207 return false;
208 }
209 else
210 {
211 this.setBeenAttacked();
212 this.xpOrbHealth -= par2;
213
214 if (this.xpOrbHealth <= 0)
215 {
216 this.setDead();
217 }
218
219 return false;
220 }
221 }
222
223 /**
224 * (abstract) Protected helper method to write subclass entity data to NBT.
225 */
226 public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
227 {
228 par1NBTTagCompound.setShort("Health", (short)((byte)this.xpOrbHealth));
229 par1NBTTagCompound.setShort("Age", (short)this.xpOrbAge);
230 par1NBTTagCompound.setShort("Value", (short)this.xpValue);
231 }
232
233 /**
234 * (abstract) Protected helper method to read subclass entity data from NBT.
235 */
236 public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
237 {
238 this.xpOrbHealth = par1NBTTagCompound.getShort("Health") & 255;
239 this.xpOrbAge = par1NBTTagCompound.getShort("Age");
240 this.xpValue = par1NBTTagCompound.getShort("Value");
241 }
242
243 /**
244 * Called by a player entity when they collide with an entity
245 */
246 public void onCollideWithPlayer(EntityPlayer par1EntityPlayer)
247 {
248 if (!this.worldObj.isRemote)
249 {
250 if (this.field_70532_c == 0 && par1EntityPlayer.xpCooldown == 0)
251 {
252 par1EntityPlayer.xpCooldown = 2;
253 this.playSound("random.orb", 0.1F, 0.5F * ((this.rand.nextFloat() - this.rand.nextFloat()) * 0.7F + 1.8F));
254 par1EntityPlayer.onItemPickup(this, 1);
255 par1EntityPlayer.addExperience(this.xpValue);
256 this.setDead();
257 }
258 }
259 }
260
261 /**
262 * Returns the XP value of this XP orb.
263 */
264 public int getXpValue()
265 {
266 return this.xpValue;
267 }
268
269 @SideOnly(Side.CLIENT)
270
271 /**
272 * Returns a number from 1 to 10 based on how much XP this orb is worth. This is used by RenderXPOrb to determine
273 * what texture to use.
274 */
275 public int getTextureByXP()
276 {
277 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)))))))));
278 }
279
280 /**
281 * Get xp split rate (Is called until the xp drop code in EntityLiving.onEntityUpdate is complete)
282 */
283 public static int getXPSplit(int par0)
284 {
285 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)))))))));
286 }
287
288 /**
289 * If returns false, the item will not inflict any damage against entities.
290 */
291 public boolean canAttackWithItem()
292 {
293 return false;
294 }
295 }