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 implements IProjectile
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.setThrowableHeading(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.setThrowableHeading(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 * Similar to setArrowHeading, it's point the throwable entity to a x, y, z direction.
105 */
106 public void setThrowableHeading(double var1, double var3, double var5, float var7, float var8)
107 {
108 float var9 = MathHelper.sqrt_double(var1 * var1 + var3 * var3 + var5 * var5);
109 var1 /= (double)var9;
110 var3 /= (double)var9;
111 var5 /= (double)var9;
112 var1 += this.rand.nextGaussian() * 0.007499999832361937D * (double)var8;
113 var3 += this.rand.nextGaussian() * 0.007499999832361937D * (double)var8;
114 var5 += this.rand.nextGaussian() * 0.007499999832361937D * (double)var8;
115 var1 *= (double)var7;
116 var3 *= (double)var7;
117 var5 *= (double)var7;
118 this.motionX = var1;
119 this.motionY = var3;
120 this.motionZ = var5;
121 float var10 = MathHelper.sqrt_double(var1 * var1 + var5 * var5);
122 this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(var1, var5) * 180.0D / Math.PI);
123 this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(var3, (double)var10) * 180.0D / Math.PI);
124 this.ticksInGround = 0;
125 }
126
127 @SideOnly(Side.CLIENT)
128
129 /**
130 * Sets the position and rotation. Only difference from the other one is no bounding on the rotation. Args: posX,
131 * posY, posZ, yaw, pitch
132 */
133 public void setPositionAndRotation2(double par1, double par3, double par5, float par7, float par8, int par9)
134 {
135 this.setPosition(par1, par3, par5);
136 this.setRotation(par7, par8);
137 }
138
139 @SideOnly(Side.CLIENT)
140
141 /**
142 * Sets the velocity to the args. Args: x, y, z
143 */
144 public void setVelocity(double par1, double par3, double par5)
145 {
146 this.motionX = par1;
147 this.motionY = par3;
148 this.motionZ = par5;
149
150 if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
151 {
152 float var7 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
153 this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
154 this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var7) * 180.0D / Math.PI);
155 this.prevRotationPitch = this.rotationPitch;
156 this.prevRotationYaw = this.rotationYaw;
157 this.setLocationAndAngles(this.posX, this.posY, this.posZ, this.rotationYaw, this.rotationPitch);
158 this.ticksInGround = 0;
159 }
160 }
161
162 /**
163 * Called to update the entity's position/logic.
164 */
165 public void onUpdate()
166 {
167 super.onUpdate();
168
169 if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
170 {
171 float var1 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
172 this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
173 this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var1) * 180.0D / Math.PI);
174 }
175
176 int var16 = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
177
178 if (var16 > 0)
179 {
180 Block.blocksList[var16].setBlockBoundsBasedOnState(this.worldObj, this.xTile, this.yTile, this.zTile);
181 AxisAlignedBB var2 = Block.blocksList[var16].getCollisionBoundingBoxFromPool(this.worldObj, this.xTile, this.yTile, this.zTile);
182
183 if (var2 != null && var2.isVecInside(this.worldObj.func_82732_R().getVecFromPool(this.posX, this.posY, this.posZ)))
184 {
185 this.inGround = true;
186 }
187 }
188
189 if (this.arrowShake > 0)
190 {
191 --this.arrowShake;
192 }
193
194 if (this.inGround)
195 {
196 int var18 = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
197 int var19 = this.worldObj.getBlockMetadata(this.xTile, this.yTile, this.zTile);
198
199 if (var18 == this.inTile && var19 == this.inData)
200 {
201 ++this.ticksInGround;
202
203 if (this.ticksInGround == 1200)
204 {
205 this.setDead();
206 }
207 }
208 else
209 {
210 this.inGround = false;
211 this.motionX *= (double)(this.rand.nextFloat() * 0.2F);
212 this.motionY *= (double)(this.rand.nextFloat() * 0.2F);
213 this.motionZ *= (double)(this.rand.nextFloat() * 0.2F);
214 this.ticksInGround = 0;
215 this.ticksInAir = 0;
216 }
217 }
218 else
219 {
220 ++this.ticksInAir;
221 Vec3 var17 = this.worldObj.func_82732_R().getVecFromPool(this.posX, this.posY, this.posZ);
222 Vec3 var3 = this.worldObj.func_82732_R().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
223 MovingObjectPosition var4 = this.worldObj.rayTraceBlocks_do_do(var17, var3, false, true);
224 var17 = this.worldObj.func_82732_R().getVecFromPool(this.posX, this.posY, this.posZ);
225 var3 = this.worldObj.func_82732_R().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
226
227 if (var4 != null)
228 {
229 var3 = this.worldObj.func_82732_R().getVecFromPool(var4.hitVec.xCoord, var4.hitVec.yCoord, var4.hitVec.zCoord);
230 }
231
232 Entity var5 = null;
233 List var6 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, this.boundingBox.addCoord(this.motionX, this.motionY, this.motionZ).expand(1.0D, 1.0D, 1.0D));
234 double var7 = 0.0D;
235 Iterator var9 = var6.iterator();
236 float var11;
237
238 while (var9.hasNext())
239 {
240 Entity var10 = (Entity)var9.next();
241
242 if (var10.canBeCollidedWith() && (var10 != this.shootingEntity || this.ticksInAir >= 5))
243 {
244 var11 = 0.3F;
245 AxisAlignedBB var12 = var10.boundingBox.expand((double)var11, (double)var11, (double)var11);
246 MovingObjectPosition var13 = var12.calculateIntercept(var17, var3);
247
248 if (var13 != null)
249 {
250 double var14 = var17.distanceTo(var13.hitVec);
251
252 if (var14 < var7 || var7 == 0.0D)
253 {
254 var5 = var10;
255 var7 = var14;
256 }
257 }
258 }
259 }
260
261 if (var5 != null)
262 {
263 var4 = new MovingObjectPosition(var5);
264 }
265
266 float var20;
267
268 if (var4 != null)
269 {
270 if (var4.entityHit != null)
271 {
272 var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
273 int var24 = MathHelper.ceiling_double_int((double)var20 * this.damage);
274
275 if (this.getIsCritical())
276 {
277 var24 += this.rand.nextInt(var24 / 2 + 2);
278 }
279
280 DamageSource var22 = null;
281
282 if (this.shootingEntity == null)
283 {
284 var22 = DamageSource.causeArrowDamage(this, this);
285 }
286 else
287 {
288 var22 = DamageSource.causeArrowDamage(this, this.shootingEntity);
289 }
290
291 if (this.isBurning())
292 {
293 var4.entityHit.setFire(5);
294 }
295
296 if (var4.entityHit.attackEntityFrom(var22, var24))
297 {
298 if (var4.entityHit instanceof EntityLiving)
299 {
300 ++((EntityLiving)var4.entityHit).arrowHitTempCounter;
301
302 if (this.knockbackStrength > 0)
303 {
304 float var25 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
305
306 if (var25 > 0.0F)
307 {
308 var4.entityHit.addVelocity(this.motionX * (double)this.knockbackStrength * 0.6000000238418579D / (double)var25, 0.1D, this.motionZ * (double)this.knockbackStrength * 0.6000000238418579D / (double)var25);
309 }
310 }
311 }
312
313 this.worldObj.playSoundAtEntity(this, "random.bowhit", 1.0F, 1.2F / (this.rand.nextFloat() * 0.2F + 0.9F));
314 this.setDead();
315 }
316 else
317 {
318 this.motionX *= -0.10000000149011612D;
319 this.motionY *= -0.10000000149011612D;
320 this.motionZ *= -0.10000000149011612D;
321 this.rotationYaw += 180.0F;
322 this.prevRotationYaw += 180.0F;
323 this.ticksInAir = 0;
324 }
325 }
326 else
327 {
328 this.xTile = var4.blockX;
329 this.yTile = var4.blockY;
330 this.zTile = var4.blockZ;
331 this.inTile = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
332 this.inData = this.worldObj.getBlockMetadata(this.xTile, this.yTile, this.zTile);
333 this.motionX = (double)((float)(var4.hitVec.xCoord - this.posX));
334 this.motionY = (double)((float)(var4.hitVec.yCoord - this.posY));
335 this.motionZ = (double)((float)(var4.hitVec.zCoord - this.posZ));
336 var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
337 this.posX -= this.motionX / (double)var20 * 0.05000000074505806D;
338 this.posY -= this.motionY / (double)var20 * 0.05000000074505806D;
339 this.posZ -= this.motionZ / (double)var20 * 0.05000000074505806D;
340 this.worldObj.playSoundAtEntity(this, "random.bowhit", 1.0F, 1.2F / (this.rand.nextFloat() * 0.2F + 0.9F));
341 this.inGround = true;
342 this.arrowShake = 7;
343 this.setIsCritical(false);
344 }
345 }
346
347 if (this.getIsCritical())
348 {
349 for (int var21 = 0; var21 < 4; ++var21)
350 {
351 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);
352 }
353 }
354
355 this.posX += this.motionX;
356 this.posY += this.motionY;
357 this.posZ += this.motionZ;
358 var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
359 this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
360
361 for (this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var20) * 180.0D / Math.PI); this.rotationPitch - this.prevRotationPitch < -180.0F; this.prevRotationPitch -= 360.0F)
362 {
363 ;
364 }
365
366 while (this.rotationPitch - this.prevRotationPitch >= 180.0F)
367 {
368 this.prevRotationPitch += 360.0F;
369 }
370
371 while (this.rotationYaw - this.prevRotationYaw < -180.0F)
372 {
373 this.prevRotationYaw -= 360.0F;
374 }
375
376 while (this.rotationYaw - this.prevRotationYaw >= 180.0F)
377 {
378 this.prevRotationYaw += 360.0F;
379 }
380
381 this.rotationPitch = this.prevRotationPitch + (this.rotationPitch - this.prevRotationPitch) * 0.2F;
382 this.rotationYaw = this.prevRotationYaw + (this.rotationYaw - this.prevRotationYaw) * 0.2F;
383 float var23 = 0.99F;
384 var11 = 0.05F;
385
386 if (this.isInWater())
387 {
388 for (int var26 = 0; var26 < 4; ++var26)
389 {
390 float var27 = 0.25F;
391 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);
392 }
393
394 var23 = 0.8F;
395 }
396
397 this.motionX *= (double)var23;
398 this.motionY *= (double)var23;
399 this.motionZ *= (double)var23;
400 this.motionY -= (double)var11;
401 this.setPosition(this.posX, this.posY, this.posZ);
402 this.doBlockCollisions();
403 }
404 }
405
406 /**
407 * (abstract) Protected helper method to write subclass entity data to NBT.
408 */
409 public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
410 {
411 par1NBTTagCompound.setShort("xTile", (short)this.xTile);
412 par1NBTTagCompound.setShort("yTile", (short)this.yTile);
413 par1NBTTagCompound.setShort("zTile", (short)this.zTile);
414 par1NBTTagCompound.setByte("inTile", (byte)this.inTile);
415 par1NBTTagCompound.setByte("inData", (byte)this.inData);
416 par1NBTTagCompound.setByte("shake", (byte)this.arrowShake);
417 par1NBTTagCompound.setByte("inGround", (byte)(this.inGround ? 1 : 0));
418 par1NBTTagCompound.setByte("pickup", (byte)this.canBePickedUp);
419 par1NBTTagCompound.setDouble("damage", this.damage);
420 }
421
422 /**
423 * (abstract) Protected helper method to read subclass entity data from NBT.
424 */
425 public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
426 {
427 this.xTile = par1NBTTagCompound.getShort("xTile");
428 this.yTile = par1NBTTagCompound.getShort("yTile");
429 this.zTile = par1NBTTagCompound.getShort("zTile");
430 this.inTile = par1NBTTagCompound.getByte("inTile") & 255;
431 this.inData = par1NBTTagCompound.getByte("inData") & 255;
432 this.arrowShake = par1NBTTagCompound.getByte("shake") & 255;
433 this.inGround = par1NBTTagCompound.getByte("inGround") == 1;
434
435 if (par1NBTTagCompound.hasKey("damage"))
436 {
437 this.damage = par1NBTTagCompound.getDouble("damage");
438 }
439
440 if (par1NBTTagCompound.hasKey("pickup"))
441 {
442 this.canBePickedUp = par1NBTTagCompound.getByte("pickup");
443 }
444 else if (par1NBTTagCompound.hasKey("player"))
445 {
446 this.canBePickedUp = par1NBTTagCompound.getBoolean("player") ? 1 : 0;
447 }
448 }
449
450 /**
451 * Called by a player entity when they collide with an entity
452 */
453 public void onCollideWithPlayer(EntityPlayer par1EntityPlayer)
454 {
455 if (!this.worldObj.isRemote && this.inGround && this.arrowShake <= 0)
456 {
457 boolean var2 = this.canBePickedUp == 1 || this.canBePickedUp == 2 && par1EntityPlayer.capabilities.isCreativeMode;
458
459 if (this.canBePickedUp == 1 && !par1EntityPlayer.inventory.addItemStackToInventory(new ItemStack(Item.arrow, 1)))
460 {
461 var2 = false;
462 }
463
464 if (var2)
465 {
466 this.worldObj.playSoundAtEntity(this, "random.pop", 0.2F, ((this.rand.nextFloat() - this.rand.nextFloat()) * 0.7F + 1.0F) * 2.0F);
467 par1EntityPlayer.onItemPickup(this, 1);
468 this.setDead();
469 }
470 }
471 }
472
473 /**
474 * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
475 * prevent them from trampling crops
476 */
477 protected boolean canTriggerWalking()
478 {
479 return false;
480 }
481
482 @SideOnly(Side.CLIENT)
483 public float getShadowSize()
484 {
485 return 0.0F;
486 }
487
488 public void setDamage(double par1)
489 {
490 this.damage = par1;
491 }
492
493 public double getDamage()
494 {
495 return this.damage;
496 }
497
498 /**
499 * Sets the amount of knockback the arrow applies when it hits a mob.
500 */
501 public void setKnockbackStrength(int par1)
502 {
503 this.knockbackStrength = par1;
504 }
505
506 /**
507 * If returns false, the item will not inflict any damage against entities.
508 */
509 public boolean canAttackWithItem()
510 {
511 return false;
512 }
513
514 /**
515 * Whether the arrow has a stream of critical hit particles flying behind it.
516 */
517 public void setIsCritical(boolean par1)
518 {
519 byte var2 = this.dataWatcher.getWatchableObjectByte(16);
520
521 if (par1)
522 {
523 this.dataWatcher.updateObject(16, Byte.valueOf((byte)(var2 | 1)));
524 }
525 else
526 {
527 this.dataWatcher.updateObject(16, Byte.valueOf((byte)(var2 & -2)));
528 }
529 }
530
531 /**
532 * Whether the arrow has a stream of critical hit particles flying behind it.
533 */
534 public boolean getIsCritical()
535 {
536 byte var1 = this.dataWatcher.getWatchableObjectByte(16);
537 return (var1 & 1) != 0;
538 }
539 }