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 }