001 package net.minecraft.src;
002
003 import cpw.mods.fml.common.Side;
004 import cpw.mods.fml.common.asm.SideOnly;
005 import java.util.Iterator;
006 import java.util.List;
007
008 public class EntityArrow extends Entity
009 {
010 private int xTile = -1;
011 private int yTile = -1;
012 private int zTile = -1;
013 private int inTile = 0;
014 private int inData = 0;
015 private boolean inGround = false;
016
017 /** 1 if the player can pick up the arrow */
018 public int canBePickedUp = 0;
019
020 /** Seems to be some sort of timer for animating an arrow. */
021 public int arrowShake = 0;
022
023 /** The owner of this arrow. */
024 public Entity shootingEntity;
025 private int ticksInGround;
026 private int ticksInAir = 0;
027 private double damage = 2.0D;
028
029 /** The amount of knockback an arrow applies when it hits a mob. */
030 private int knockbackStrength;
031
032 public EntityArrow(World par1World)
033 {
034 super(par1World);
035 this.setSize(0.5F, 0.5F);
036 }
037
038 public EntityArrow(World par1World, double par2, double par4, double par6)
039 {
040 super(par1World);
041 this.setSize(0.5F, 0.5F);
042 this.setPosition(par2, par4, par6);
043 this.yOffset = 0.0F;
044 }
045
046 public EntityArrow(World par1World, EntityLiving par2EntityLiving, EntityLiving par3EntityLiving, float par4, float par5)
047 {
048 super(par1World);
049 this.shootingEntity = par2EntityLiving;
050
051 if (par2EntityLiving instanceof EntityPlayer)
052 {
053 this.canBePickedUp = 1;
054 }
055
056 this.posY = par2EntityLiving.posY + (double)par2EntityLiving.getEyeHeight() - 0.10000000149011612D;
057 double var6 = par3EntityLiving.posX - par2EntityLiving.posX;
058 double var8 = par3EntityLiving.posY + (double)par3EntityLiving.getEyeHeight() - 0.699999988079071D - this.posY;
059 double var10 = par3EntityLiving.posZ - par2EntityLiving.posZ;
060 double var12 = (double)MathHelper.sqrt_double(var6 * var6 + var10 * var10);
061
062 if (var12 >= 1.0E-7D)
063 {
064 float var14 = (float)(Math.atan2(var10, var6) * 180.0D / Math.PI) - 90.0F;
065 float var15 = (float)(-(Math.atan2(var8, var12) * 180.0D / Math.PI));
066 double var16 = var6 / var12;
067 double var18 = var10 / var12;
068 this.setLocationAndAngles(par2EntityLiving.posX + var16, this.posY, par2EntityLiving.posZ + var18, var14, var15);
069 this.yOffset = 0.0F;
070 float var20 = (float)var12 * 0.2F;
071 this.setArrowHeading(var6, var8 + (double)var20, var10, par4, par5);
072 }
073 }
074
075 public EntityArrow(World par1World, EntityLiving par2EntityLiving, float par3)
076 {
077 super(par1World);
078 this.shootingEntity = par2EntityLiving;
079
080 if (par2EntityLiving instanceof EntityPlayer)
081 {
082 this.canBePickedUp = 1;
083 }
084
085 this.setSize(0.5F, 0.5F);
086 this.setLocationAndAngles(par2EntityLiving.posX, par2EntityLiving.posY + (double)par2EntityLiving.getEyeHeight(), par2EntityLiving.posZ, par2EntityLiving.rotationYaw, par2EntityLiving.rotationPitch);
087 this.posX -= (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
088 this.posY -= 0.10000000149011612D;
089 this.posZ -= (double)(MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
090 this.setPosition(this.posX, this.posY, this.posZ);
091 this.yOffset = 0.0F;
092 this.motionX = (double)(-MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI));
093 this.motionZ = (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI));
094 this.motionY = (double)(-MathHelper.sin(this.rotationPitch / 180.0F * (float)Math.PI));
095 this.setArrowHeading(this.motionX, this.motionY, this.motionZ, par3 * 1.5F, 1.0F);
096 }
097
098 protected void entityInit()
099 {
100 this.dataWatcher.addObject(16, Byte.valueOf((byte)0));
101 }
102
103 /**
104 * Uses the provided coordinates as a heading and determines the velocity from it with the set force and random
105 * variance. Args: x, y, z, force, forceVariation
106 */
107 public void setArrowHeading(double par1, double par3, double par5, float par7, float par8)
108 {
109 float var9 = MathHelper.sqrt_double(par1 * par1 + par3 * par3 + par5 * par5);
110 par1 /= (double)var9;
111 par3 /= (double)var9;
112 par5 /= (double)var9;
113 par1 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
114 par3 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
115 par5 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
116 par1 *= (double)par7;
117 par3 *= (double)par7;
118 par5 *= (double)par7;
119 this.motionX = par1;
120 this.motionY = par3;
121 this.motionZ = par5;
122 float var10 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
123 this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
124 this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var10) * 180.0D / Math.PI);
125 this.ticksInGround = 0;
126 }
127
128 @SideOnly(Side.CLIENT)
129
130 /**
131 * Sets the position and rotation. Only difference from the other one is no bounding on the rotation. Args: posX,
132 * posY, posZ, yaw, pitch
133 */
134 public void setPositionAndRotation2(double par1, double par3, double par5, float par7, float par8, int par9)
135 {
136 this.setPosition(par1, par3, par5);
137 this.setRotation(par7, par8);
138 }
139
140 @SideOnly(Side.CLIENT)
141
142 /**
143 * Sets the velocity to the args. Args: x, y, z
144 */
145 public void setVelocity(double par1, double par3, double par5)
146 {
147 this.motionX = par1;
148 this.motionY = par3;
149 this.motionZ = par5;
150
151 if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
152 {
153 float var7 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
154 this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
155 this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var7) * 180.0D / Math.PI);
156 this.prevRotationPitch = this.rotationPitch;
157 this.prevRotationYaw = this.rotationYaw;
158 this.setLocationAndAngles(this.posX, this.posY, this.posZ, this.rotationYaw, this.rotationPitch);
159 this.ticksInGround = 0;
160 }
161 }
162
163 /**
164 * Called to update the entity's position/logic.
165 */
166 public void onUpdate()
167 {
168 super.onUpdate();
169
170 if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
171 {
172 float var1 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
173 this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
174 this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var1) * 180.0D / Math.PI);
175 }
176
177 int var16 = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
178
179 if (var16 > 0)
180 {
181 Block.blocksList[var16].setBlockBoundsBasedOnState(this.worldObj, this.xTile, this.yTile, this.zTile);
182 AxisAlignedBB var2 = Block.blocksList[var16].getCollisionBoundingBoxFromPool(this.worldObj, this.xTile, this.yTile, this.zTile);
183
184 if (var2 != null && var2.isVecInside(Vec3.getVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ)))
185 {
186 this.inGround = true;
187 }
188 }
189
190 if (this.arrowShake > 0)
191 {
192 --this.arrowShake;
193 }
194
195 if (this.inGround)
196 {
197 int var18 = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
198 int var19 = this.worldObj.getBlockMetadata(this.xTile, this.yTile, this.zTile);
199
200 if (var18 == this.inTile && var19 == this.inData)
201 {
202 ++this.ticksInGround;
203
204 if (this.ticksInGround == 1200)
205 {
206 this.setDead();
207 }
208 }
209 else
210 {
211 this.inGround = false;
212 this.motionX *= (double)(this.rand.nextFloat() * 0.2F);
213 this.motionY *= (double)(this.rand.nextFloat() * 0.2F);
214 this.motionZ *= (double)(this.rand.nextFloat() * 0.2F);
215 this.ticksInGround = 0;
216 this.ticksInAir = 0;
217 }
218 }
219 else
220 {
221 ++this.ticksInAir;
222 Vec3 var17 = Vec3.getVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
223 Vec3 var3 = Vec3.getVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
224 MovingObjectPosition var4 = this.worldObj.rayTraceBlocks_do_do(var17, var3, false, true);
225 var17 = Vec3.getVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
226 var3 = Vec3.getVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
227
228 if (var4 != null)
229 {
230 var3 = Vec3.getVec3Pool().getVecFromPool(var4.hitVec.xCoord, var4.hitVec.yCoord, var4.hitVec.zCoord);
231 }
232
233 Entity var5 = null;
234 List var6 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, this.boundingBox.addCoord(this.motionX, this.motionY, this.motionZ).expand(1.0D, 1.0D, 1.0D));
235 double var7 = 0.0D;
236 Iterator var9 = var6.iterator();
237 float var11;
238
239 while (var9.hasNext())
240 {
241 Entity var10 = (Entity)var9.next();
242
243 if (var10.canBeCollidedWith() && (var10 != this.shootingEntity || this.ticksInAir >= 5))
244 {
245 var11 = 0.3F;
246 AxisAlignedBB var12 = var10.boundingBox.expand((double)var11, (double)var11, (double)var11);
247 MovingObjectPosition var13 = var12.calculateIntercept(var17, var3);
248
249 if (var13 != null)
250 {
251 double var14 = var17.distanceTo(var13.hitVec);
252
253 if (var14 < var7 || var7 == 0.0D)
254 {
255 var5 = var10;
256 var7 = var14;
257 }
258 }
259 }
260 }
261
262 if (var5 != null)
263 {
264 var4 = new MovingObjectPosition(var5);
265 }
266
267 float var20;
268
269 if (var4 != null)
270 {
271 if (var4.entityHit != null)
272 {
273 var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
274 int var24 = MathHelper.ceiling_double_int((double)var20 * this.damage);
275
276 if (this.func_70241_g())
277 {
278 var24 += this.rand.nextInt(var24 / 2 + 2);
279 }
280
281 DamageSource var22 = null;
282
283 if (this.shootingEntity == null)
284 {
285 var22 = DamageSource.causeArrowDamage(this, this);
286 }
287 else
288 {
289 var22 = DamageSource.causeArrowDamage(this, this.shootingEntity);
290 }
291
292 if (this.isBurning())
293 {
294 var4.entityHit.setFire(5);
295 }
296
297 if (var4.entityHit.attackEntityFrom(var22, var24))
298 {
299 if (var4.entityHit instanceof EntityLiving)
300 {
301 ++((EntityLiving)var4.entityHit).arrowHitTempCounter;
302
303 if (this.knockbackStrength > 0)
304 {
305 float var25 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
306
307 if (var25 > 0.0F)
308 {
309 var4.entityHit.addVelocity(this.motionX * (double)this.knockbackStrength * 0.6000000238418579D / (double)var25, 0.1D, this.motionZ * (double)this.knockbackStrength * 0.6000000238418579D / (double)var25);
310 }
311 }
312 }
313
314 this.worldObj.playSoundAtEntity(this, "random.bowhit", 1.0F, 1.2F / (this.rand.nextFloat() * 0.2F + 0.9F));
315 this.setDead();
316 }
317 else
318 {
319 this.motionX *= -0.10000000149011612D;
320 this.motionY *= -0.10000000149011612D;
321 this.motionZ *= -0.10000000149011612D;
322 this.rotationYaw += 180.0F;
323 this.prevRotationYaw += 180.0F;
324 this.ticksInAir = 0;
325 }
326 }
327 else
328 {
329 this.xTile = var4.blockX;
330 this.yTile = var4.blockY;
331 this.zTile = var4.blockZ;
332 this.inTile = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
333 this.inData = this.worldObj.getBlockMetadata(this.xTile, this.yTile, this.zTile);
334 this.motionX = (double)((float)(var4.hitVec.xCoord - this.posX));
335 this.motionY = (double)((float)(var4.hitVec.yCoord - this.posY));
336 this.motionZ = (double)((float)(var4.hitVec.zCoord - this.posZ));
337 var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
338 this.posX -= this.motionX / (double)var20 * 0.05000000074505806D;
339 this.posY -= this.motionY / (double)var20 * 0.05000000074505806D;
340 this.posZ -= this.motionZ / (double)var20 * 0.05000000074505806D;
341 this.worldObj.playSoundAtEntity(this, "random.bowhit", 1.0F, 1.2F / (this.rand.nextFloat() * 0.2F + 0.9F));
342 this.inGround = true;
343 this.arrowShake = 7;
344 this.func_70243_d(false);
345 }
346 }
347
348 if (this.func_70241_g())
349 {
350 for (int var21 = 0; var21 < 4; ++var21)
351 {
352 this.worldObj.spawnParticle("crit", this.posX + this.motionX * (double)var21 / 4.0D, this.posY + this.motionY * (double)var21 / 4.0D, this.posZ + this.motionZ * (double)var21 / 4.0D, -this.motionX, -this.motionY + 0.2D, -this.motionZ);
353 }
354 }
355
356 this.posX += this.motionX;
357 this.posY += this.motionY;
358 this.posZ += this.motionZ;
359 var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
360 this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
361
362 for (this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var20) * 180.0D / Math.PI); this.rotationPitch - this.prevRotationPitch < -180.0F; this.prevRotationPitch -= 360.0F)
363 {
364 ;
365 }
366
367 while (this.rotationPitch - this.prevRotationPitch >= 180.0F)
368 {
369 this.prevRotationPitch += 360.0F;
370 }
371
372 while (this.rotationYaw - this.prevRotationYaw < -180.0F)
373 {
374 this.prevRotationYaw -= 360.0F;
375 }
376
377 while (this.rotationYaw - this.prevRotationYaw >= 180.0F)
378 {
379 this.prevRotationYaw += 360.0F;
380 }
381
382 this.rotationPitch = this.prevRotationPitch + (this.rotationPitch - this.prevRotationPitch) * 0.2F;
383 this.rotationYaw = this.prevRotationYaw + (this.rotationYaw - this.prevRotationYaw) * 0.2F;
384 float var23 = 0.99F;
385 var11 = 0.05F;
386
387 if (this.isInWater())
388 {
389 for (int var26 = 0; var26 < 4; ++var26)
390 {
391 float var27 = 0.25F;
392 this.worldObj.spawnParticle("bubble", this.posX - this.motionX * (double)var27, this.posY - this.motionY * (double)var27, this.posZ - this.motionZ * (double)var27, this.motionX, this.motionY, this.motionZ);
393 }
394
395 var23 = 0.8F;
396 }
397
398 this.motionX *= (double)var23;
399 this.motionY *= (double)var23;
400 this.motionZ *= (double)var23;
401 this.motionY -= (double)var11;
402 this.setPosition(this.posX, this.posY, this.posZ);
403 this.doBlockCollisions();
404 }
405 }
406
407 /**
408 * (abstract) Protected helper method to write subclass entity data to NBT.
409 */
410 public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
411 {
412 par1NBTTagCompound.setShort("xTile", (short)this.xTile);
413 par1NBTTagCompound.setShort("yTile", (short)this.yTile);
414 par1NBTTagCompound.setShort("zTile", (short)this.zTile);
415 par1NBTTagCompound.setByte("inTile", (byte)this.inTile);
416 par1NBTTagCompound.setByte("inData", (byte)this.inData);
417 par1NBTTagCompound.setByte("shake", (byte)this.arrowShake);
418 par1NBTTagCompound.setByte("inGround", (byte)(this.inGround ? 1 : 0));
419 par1NBTTagCompound.setByte("pickup", (byte)this.canBePickedUp);
420 par1NBTTagCompound.setDouble("damage", this.damage);
421 }
422
423 /**
424 * (abstract) Protected helper method to read subclass entity data from NBT.
425 */
426 public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
427 {
428 this.xTile = par1NBTTagCompound.getShort("xTile");
429 this.yTile = par1NBTTagCompound.getShort("yTile");
430 this.zTile = par1NBTTagCompound.getShort("zTile");
431 this.inTile = par1NBTTagCompound.getByte("inTile") & 255;
432 this.inData = par1NBTTagCompound.getByte("inData") & 255;
433 this.arrowShake = par1NBTTagCompound.getByte("shake") & 255;
434 this.inGround = par1NBTTagCompound.getByte("inGround") == 1;
435
436 if (par1NBTTagCompound.hasKey("damage"))
437 {
438 this.damage = par1NBTTagCompound.getDouble("damage");
439 }
440
441 if (par1NBTTagCompound.hasKey("pickup"))
442 {
443 this.canBePickedUp = par1NBTTagCompound.getByte("pickup");
444 }
445 else if (par1NBTTagCompound.hasKey("player"))
446 {
447 this.canBePickedUp = par1NBTTagCompound.getBoolean("player") ? 1 : 0;
448 }
449 }
450
451 /**
452 * Called by a player entity when they collide with an entity
453 */
454 public void onCollideWithPlayer(EntityPlayer par1EntityPlayer)
455 {
456 if (!this.worldObj.isRemote && this.inGround && this.arrowShake <= 0)
457 {
458 boolean var2 = this.canBePickedUp == 1 || this.canBePickedUp == 2 && par1EntityPlayer.capabilities.isCreativeMode;
459
460 if (this.canBePickedUp == 1 && !par1EntityPlayer.inventory.addItemStackToInventory(new ItemStack(Item.arrow, 1)))
461 {
462 var2 = false;
463 }
464
465 if (var2)
466 {
467 this.worldObj.playSoundAtEntity(this, "random.pop", 0.2F, ((this.rand.nextFloat() - this.rand.nextFloat()) * 0.7F + 1.0F) * 2.0F);
468 par1EntityPlayer.onItemPickup(this, 1);
469 this.setDead();
470 }
471 }
472 }
473
474 @SideOnly(Side.CLIENT)
475 public float getShadowSize()
476 {
477 return 0.0F;
478 }
479
480 public void setDamage(double par1)
481 {
482 this.damage = par1;
483 }
484
485 public double getDamage()
486 {
487 return this.damage;
488 }
489
490 /**
491 * Sets the amount of knockback the arrow applies when it hits a mob.
492 */
493 public void setKnockbackStrength(int par1)
494 {
495 this.knockbackStrength = par1;
496 }
497
498 /**
499 * If returns false, the item will not inflict any damage against entities.
500 */
501 public boolean canAttackWithItem()
502 {
503 return false;
504 }
505
506 public void func_70243_d(boolean par1)
507 {
508 byte var2 = this.dataWatcher.getWatchableObjectByte(16);
509
510 if (par1)
511 {
512 this.dataWatcher.updateObject(16, Byte.valueOf((byte)(var2 | 1)));
513 }
514 else
515 {
516 this.dataWatcher.updateObject(16, Byte.valueOf((byte)(var2 & -2)));
517 }
518 }
519
520 public boolean func_70241_g()
521 {
522 byte var1 = this.dataWatcher.getWatchableObjectByte(16);
523 return (var1 & 1) != 0;
524 }
525 }