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 par1, double par3, double par5, float par7, float par8)
107 {
108 float var9 = MathHelper.sqrt_double(par1 * par1 + par3 * par3 + par5 * par5);
109 par1 /= (double)var9;
110 par3 /= (double)var9;
111 par5 /= (double)var9;
112 par1 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
113 par3 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
114 par5 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
115 par1 *= (double)par7;
116 par3 *= (double)par7;
117 par5 *= (double)par7;
118 this.motionX = par1;
119 this.motionY = par3;
120 this.motionZ = par5;
121 float var10 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
122 this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
123 this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (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.getWorldVec3Pool().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.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
222 Vec3 var3 = this.worldObj.getWorldVec3Pool().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.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
225 var3 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
226
227 if (var4 != null)
228 {
229 var3 = this.worldObj.getWorldVec3Pool().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 if (!this.worldObj.isRemote)
301 {
302 EntityLiving var25 = (EntityLiving)var4.entityHit;
303 var25.func_85034_r(var25.func_85035_bI() + 1);
304 }
305
306 if (this.knockbackStrength > 0)
307 {
308 float var26 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
309
310 if (var26 > 0.0F)
311 {
312 var4.entityHit.addVelocity(this.motionX * (double)this.knockbackStrength * 0.6000000238418579D / (double)var26, 0.1D, this.motionZ * (double)this.knockbackStrength * 0.6000000238418579D / (double)var26);
313 }
314 }
315 }
316
317 this.func_85030_a("random.bowhit", 1.0F, 1.2F / (this.rand.nextFloat() * 0.2F + 0.9F));
318 this.setDead();
319 }
320 else
321 {
322 this.motionX *= -0.10000000149011612D;
323 this.motionY *= -0.10000000149011612D;
324 this.motionZ *= -0.10000000149011612D;
325 this.rotationYaw += 180.0F;
326 this.prevRotationYaw += 180.0F;
327 this.ticksInAir = 0;
328 }
329 }
330 else
331 {
332 this.xTile = var4.blockX;
333 this.yTile = var4.blockY;
334 this.zTile = var4.blockZ;
335 this.inTile = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
336 this.inData = this.worldObj.getBlockMetadata(this.xTile, this.yTile, this.zTile);
337 this.motionX = (double)((float)(var4.hitVec.xCoord - this.posX));
338 this.motionY = (double)((float)(var4.hitVec.yCoord - this.posY));
339 this.motionZ = (double)((float)(var4.hitVec.zCoord - this.posZ));
340 var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
341 this.posX -= this.motionX / (double)var20 * 0.05000000074505806D;
342 this.posY -= this.motionY / (double)var20 * 0.05000000074505806D;
343 this.posZ -= this.motionZ / (double)var20 * 0.05000000074505806D;
344 this.func_85030_a("random.bowhit", 1.0F, 1.2F / (this.rand.nextFloat() * 0.2F + 0.9F));
345 this.inGround = true;
346 this.arrowShake = 7;
347 this.setIsCritical(false);
348
349 if (this.inTile != 0)
350 {
351 Block.blocksList[this.inTile].onEntityCollidedWithBlock(this.worldObj, this.xTile, this.yTile, this.zTile, this);
352 }
353 }
354 }
355
356 if (this.getIsCritical())
357 {
358 for (int var21 = 0; var21 < 4; ++var21)
359 {
360 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);
361 }
362 }
363
364 this.posX += this.motionX;
365 this.posY += this.motionY;
366 this.posZ += this.motionZ;
367 var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
368 this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
369
370 for (this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var20) * 180.0D / Math.PI); this.rotationPitch - this.prevRotationPitch < -180.0F; this.prevRotationPitch -= 360.0F)
371 {
372 ;
373 }
374
375 while (this.rotationPitch - this.prevRotationPitch >= 180.0F)
376 {
377 this.prevRotationPitch += 360.0F;
378 }
379
380 while (this.rotationYaw - this.prevRotationYaw < -180.0F)
381 {
382 this.prevRotationYaw -= 360.0F;
383 }
384
385 while (this.rotationYaw - this.prevRotationYaw >= 180.0F)
386 {
387 this.prevRotationYaw += 360.0F;
388 }
389
390 this.rotationPitch = this.prevRotationPitch + (this.rotationPitch - this.prevRotationPitch) * 0.2F;
391 this.rotationYaw = this.prevRotationYaw + (this.rotationYaw - this.prevRotationYaw) * 0.2F;
392 float var23 = 0.99F;
393 var11 = 0.05F;
394
395 if (this.isInWater())
396 {
397 for (int var27 = 0; var27 < 4; ++var27)
398 {
399 float var28 = 0.25F;
400 this.worldObj.spawnParticle("bubble", this.posX - this.motionX * (double)var28, this.posY - this.motionY * (double)var28, this.posZ - this.motionZ * (double)var28, this.motionX, this.motionY, this.motionZ);
401 }
402
403 var23 = 0.8F;
404 }
405
406 this.motionX *= (double)var23;
407 this.motionY *= (double)var23;
408 this.motionZ *= (double)var23;
409 this.motionY -= (double)var11;
410 this.setPosition(this.posX, this.posY, this.posZ);
411 this.doBlockCollisions();
412 }
413 }
414
415 /**
416 * (abstract) Protected helper method to write subclass entity data to NBT.
417 */
418 public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
419 {
420 par1NBTTagCompound.setShort("xTile", (short)this.xTile);
421 par1NBTTagCompound.setShort("yTile", (short)this.yTile);
422 par1NBTTagCompound.setShort("zTile", (short)this.zTile);
423 par1NBTTagCompound.setByte("inTile", (byte)this.inTile);
424 par1NBTTagCompound.setByte("inData", (byte)this.inData);
425 par1NBTTagCompound.setByte("shake", (byte)this.arrowShake);
426 par1NBTTagCompound.setByte("inGround", (byte)(this.inGround ? 1 : 0));
427 par1NBTTagCompound.setByte("pickup", (byte)this.canBePickedUp);
428 par1NBTTagCompound.setDouble("damage", this.damage);
429 }
430
431 /**
432 * (abstract) Protected helper method to read subclass entity data from NBT.
433 */
434 public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
435 {
436 this.xTile = par1NBTTagCompound.getShort("xTile");
437 this.yTile = par1NBTTagCompound.getShort("yTile");
438 this.zTile = par1NBTTagCompound.getShort("zTile");
439 this.inTile = par1NBTTagCompound.getByte("inTile") & 255;
440 this.inData = par1NBTTagCompound.getByte("inData") & 255;
441 this.arrowShake = par1NBTTagCompound.getByte("shake") & 255;
442 this.inGround = par1NBTTagCompound.getByte("inGround") == 1;
443
444 if (par1NBTTagCompound.hasKey("damage"))
445 {
446 this.damage = par1NBTTagCompound.getDouble("damage");
447 }
448
449 if (par1NBTTagCompound.hasKey("pickup"))
450 {
451 this.canBePickedUp = par1NBTTagCompound.getByte("pickup");
452 }
453 else if (par1NBTTagCompound.hasKey("player"))
454 {
455 this.canBePickedUp = par1NBTTagCompound.getBoolean("player") ? 1 : 0;
456 }
457 }
458
459 /**
460 * Called by a player entity when they collide with an entity
461 */
462 public void onCollideWithPlayer(EntityPlayer par1EntityPlayer)
463 {
464 if (!this.worldObj.isRemote && this.inGround && this.arrowShake <= 0)
465 {
466 boolean var2 = this.canBePickedUp == 1 || this.canBePickedUp == 2 && par1EntityPlayer.capabilities.isCreativeMode;
467
468 if (this.canBePickedUp == 1 && !par1EntityPlayer.inventory.addItemStackToInventory(new ItemStack(Item.arrow, 1)))
469 {
470 var2 = false;
471 }
472
473 if (var2)
474 {
475 this.func_85030_a("random.pop", 0.2F, ((this.rand.nextFloat() - this.rand.nextFloat()) * 0.7F + 1.0F) * 2.0F);
476 par1EntityPlayer.onItemPickup(this, 1);
477 this.setDead();
478 }
479 }
480 }
481
482 /**
483 * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
484 * prevent them from trampling crops
485 */
486 protected boolean canTriggerWalking()
487 {
488 return false;
489 }
490
491 @SideOnly(Side.CLIENT)
492 public float getShadowSize()
493 {
494 return 0.0F;
495 }
496
497 public void setDamage(double par1)
498 {
499 this.damage = par1;
500 }
501
502 public double getDamage()
503 {
504 return this.damage;
505 }
506
507 /**
508 * Sets the amount of knockback the arrow applies when it hits a mob.
509 */
510 public void setKnockbackStrength(int par1)
511 {
512 this.knockbackStrength = par1;
513 }
514
515 /**
516 * If returns false, the item will not inflict any damage against entities.
517 */
518 public boolean canAttackWithItem()
519 {
520 return false;
521 }
522
523 /**
524 * Whether the arrow has a stream of critical hit particles flying behind it.
525 */
526 public void setIsCritical(boolean par1)
527 {
528 byte var2 = this.dataWatcher.getWatchableObjectByte(16);
529
530 if (par1)
531 {
532 this.dataWatcher.updateObject(16, Byte.valueOf((byte)(var2 | 1)));
533 }
534 else
535 {
536 this.dataWatcher.updateObject(16, Byte.valueOf((byte)(var2 & -2)));
537 }
538 }
539
540 /**
541 * Whether the arrow has a stream of critical hit particles flying behind it.
542 */
543 public boolean getIsCritical()
544 {
545 byte var1 = this.dataWatcher.getWatchableObjectByte(16);
546 return (var1 & 1) != 0;
547 }
548 }