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.List;
006
007 public class EntityArrow extends Entity implements IProjectile
008 {
009 private int xTile = -1;
010 private int yTile = -1;
011 private int zTile = -1;
012 private int inTile = 0;
013 private int inData = 0;
014 private boolean inGround = false;
015
016 /** 1 if the player can pick up the arrow */
017 public int canBePickedUp = 0;
018
019 /** Seems to be some sort of timer for animating an arrow. */
020 public int arrowShake = 0;
021
022 /** The owner of this arrow. */
023 public Entity shootingEntity;
024 private int ticksInGround;
025 private int ticksInAir = 0;
026 private double damage = 2.0D;
027
028 /** The amount of knockback an arrow applies when it hits a mob. */
029 private int knockbackStrength;
030
031 public EntityArrow(World par1World)
032 {
033 super(par1World);
034 this.setSize(0.5F, 0.5F);
035 }
036
037 public EntityArrow(World par1World, double par2, double par4, double par6)
038 {
039 super(par1World);
040 this.setSize(0.5F, 0.5F);
041 this.setPosition(par2, par4, par6);
042 this.yOffset = 0.0F;
043 }
044
045 public EntityArrow(World par1World, EntityLiving par2EntityLiving, EntityLiving par3EntityLiving, float par4, float par5)
046 {
047 super(par1World);
048 this.shootingEntity = par2EntityLiving;
049
050 if (par2EntityLiving instanceof EntityPlayer)
051 {
052 this.canBePickedUp = 1;
053 }
054
055 this.posY = par2EntityLiving.posY + (double)par2EntityLiving.getEyeHeight() - 0.10000000149011612D;
056 double var6 = par3EntityLiving.posX - par2EntityLiving.posX;
057 double var8 = par3EntityLiving.posY + (double)par3EntityLiving.getEyeHeight() - 0.699999988079071D - this.posY;
058 double var10 = par3EntityLiving.posZ - par2EntityLiving.posZ;
059 double var12 = (double)MathHelper.sqrt_double(var6 * var6 + var10 * var10);
060
061 if (var12 >= 1.0E-7D)
062 {
063 float var14 = (float)(Math.atan2(var10, var6) * 180.0D / Math.PI) - 90.0F;
064 float var15 = (float)(-(Math.atan2(var8, var12) * 180.0D / Math.PI));
065 double var16 = var6 / var12;
066 double var18 = var10 / var12;
067 this.setLocationAndAngles(par2EntityLiving.posX + var16, this.posY, par2EntityLiving.posZ + var18, var14, var15);
068 this.yOffset = 0.0F;
069 float var20 = (float)var12 * 0.2F;
070 this.setThrowableHeading(var6, var8 + (double)var20, var10, par4, par5);
071 }
072 }
073
074 public EntityArrow(World par1World, EntityLiving par2EntityLiving, float par3)
075 {
076 super(par1World);
077 this.shootingEntity = par2EntityLiving;
078
079 if (par2EntityLiving instanceof EntityPlayer)
080 {
081 this.canBePickedUp = 1;
082 }
083
084 this.setSize(0.5F, 0.5F);
085 this.setLocationAndAngles(par2EntityLiving.posX, par2EntityLiving.posY + (double)par2EntityLiving.getEyeHeight(), par2EntityLiving.posZ, par2EntityLiving.rotationYaw, par2EntityLiving.rotationPitch);
086 this.posX -= (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
087 this.posY -= 0.10000000149011612D;
088 this.posZ -= (double)(MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
089 this.setPosition(this.posX, this.posY, this.posZ);
090 this.yOffset = 0.0F;
091 this.motionX = (double)(-MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI));
092 this.motionZ = (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI));
093 this.motionY = (double)(-MathHelper.sin(this.rotationPitch / 180.0F * (float)Math.PI));
094 this.setThrowableHeading(this.motionX, this.motionY, this.motionZ, par3 * 1.5F, 1.0F);
095 }
096
097 protected void entityInit()
098 {
099 this.dataWatcher.addObject(16, Byte.valueOf((byte)0));
100 }
101
102 /**
103 * Similar to setArrowHeading, it's point the throwable entity to a x, y, z direction.
104 */
105 public void setThrowableHeading(double par1, double par3, double par5, float par7, float par8)
106 {
107 float var9 = MathHelper.sqrt_double(par1 * par1 + par3 * par3 + par5 * par5);
108 par1 /= (double)var9;
109 par3 /= (double)var9;
110 par5 /= (double)var9;
111 par1 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
112 par3 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
113 par5 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
114 par1 *= (double)par7;
115 par3 *= (double)par7;
116 par5 *= (double)par7;
117 this.motionX = par1;
118 this.motionY = par3;
119 this.motionZ = par5;
120 float var10 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
121 this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
122 this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var10) * 180.0D / Math.PI);
123 this.ticksInGround = 0;
124 }
125
126 @SideOnly(Side.CLIENT)
127
128 /**
129 * Sets the position and rotation. Only difference from the other one is no bounding on the rotation. Args: posX,
130 * posY, posZ, yaw, pitch
131 */
132 public void setPositionAndRotation2(double par1, double par3, double par5, float par7, float par8, int par9)
133 {
134 this.setPosition(par1, par3, par5);
135 this.setRotation(par7, par8);
136 }
137
138 @SideOnly(Side.CLIENT)
139
140 /**
141 * Sets the velocity to the args. Args: x, y, z
142 */
143 public void setVelocity(double par1, double par3, double par5)
144 {
145 this.motionX = par1;
146 this.motionY = par3;
147 this.motionZ = par5;
148
149 if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
150 {
151 float var7 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
152 this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
153 this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var7) * 180.0D / Math.PI);
154 this.prevRotationPitch = this.rotationPitch;
155 this.prevRotationYaw = this.rotationYaw;
156 this.setLocationAndAngles(this.posX, this.posY, this.posZ, this.rotationYaw, this.rotationPitch);
157 this.ticksInGround = 0;
158 }
159 }
160
161 /**
162 * Called to update the entity's position/logic.
163 */
164 public void onUpdate()
165 {
166 super.onUpdate();
167
168 if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
169 {
170 float var1 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
171 this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
172 this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var1) * 180.0D / Math.PI);
173 }
174
175 int var16 = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
176
177 if (var16 > 0)
178 {
179 Block.blocksList[var16].setBlockBoundsBasedOnState(this.worldObj, this.xTile, this.yTile, this.zTile);
180 AxisAlignedBB var2 = Block.blocksList[var16].getCollisionBoundingBoxFromPool(this.worldObj, this.xTile, this.yTile, this.zTile);
181
182 if (var2 != null && var2.isVecInside(this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ)))
183 {
184 this.inGround = true;
185 }
186 }
187
188 if (this.arrowShake > 0)
189 {
190 --this.arrowShake;
191 }
192
193 if (this.inGround)
194 {
195 int var18 = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
196 int var19 = this.worldObj.getBlockMetadata(this.xTile, this.yTile, this.zTile);
197
198 if (var18 == this.inTile && var19 == this.inData)
199 {
200 ++this.ticksInGround;
201
202 if (this.ticksInGround == 1200)
203 {
204 this.setDead();
205 }
206 }
207 else
208 {
209 this.inGround = false;
210 this.motionX *= (double)(this.rand.nextFloat() * 0.2F);
211 this.motionY *= (double)(this.rand.nextFloat() * 0.2F);
212 this.motionZ *= (double)(this.rand.nextFloat() * 0.2F);
213 this.ticksInGround = 0;
214 this.ticksInAir = 0;
215 }
216 }
217 else
218 {
219 ++this.ticksInAir;
220 Vec3 var17 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
221 Vec3 var3 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
222 MovingObjectPosition var4 = this.worldObj.rayTraceBlocks_do_do(var17, var3, false, true);
223 var17 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
224 var3 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
225
226 if (var4 != null)
227 {
228 var3 = this.worldObj.getWorldVec3Pool().getVecFromPool(var4.hitVec.xCoord, var4.hitVec.yCoord, var4.hitVec.zCoord);
229 }
230
231 Entity var5 = null;
232 List var6 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, this.boundingBox.addCoord(this.motionX, this.motionY, this.motionZ).expand(1.0D, 1.0D, 1.0D));
233 double var7 = 0.0D;
234 int var9;
235 float var11;
236
237 for (var9 = 0; var9 < var6.size(); ++var9)
238 {
239 Entity var10 = (Entity)var6.get(var9);
240
241 if (var10.canBeCollidedWith() && (var10 != this.shootingEntity || this.ticksInAir >= 5))
242 {
243 var11 = 0.3F;
244 AxisAlignedBB var12 = var10.boundingBox.expand((double)var11, (double)var11, (double)var11);
245 MovingObjectPosition var13 = var12.calculateIntercept(var17, var3);
246
247 if (var13 != null)
248 {
249 double var14 = var17.distanceTo(var13.hitVec);
250
251 if (var14 < var7 || var7 == 0.0D)
252 {
253 var5 = var10;
254 var7 = var14;
255 }
256 }
257 }
258 }
259
260 if (var5 != null)
261 {
262 var4 = new MovingObjectPosition(var5);
263 }
264
265 float var20;
266
267 if (var4 != null)
268 {
269 if (var4.entityHit != null)
270 {
271 var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
272 int var23 = MathHelper.ceiling_double_int((double)var20 * this.damage);
273
274 if (this.getIsCritical())
275 {
276 var23 += this.rand.nextInt(var23 / 2 + 2);
277 }
278
279 DamageSource var21 = null;
280
281 if (this.shootingEntity == null)
282 {
283 var21 = DamageSource.causeArrowDamage(this, this);
284 }
285 else
286 {
287 var21 = DamageSource.causeArrowDamage(this, this.shootingEntity);
288 }
289
290 if (this.isBurning())
291 {
292 var4.entityHit.setFire(5);
293 }
294
295 if (var4.entityHit.attackEntityFrom(var21, var23))
296 {
297 if (var4.entityHit instanceof EntityLiving)
298 {
299 if (!this.worldObj.isRemote)
300 {
301 EntityLiving var24 = (EntityLiving)var4.entityHit;
302 var24.func_85034_r(var24.func_85035_bI() + 1);
303 }
304
305 if (this.knockbackStrength > 0)
306 {
307 float var25 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
308
309 if (var25 > 0.0F)
310 {
311 var4.entityHit.addVelocity(this.motionX * (double)this.knockbackStrength * 0.6000000238418579D / (double)var25, 0.1D, this.motionZ * (double)this.knockbackStrength * 0.6000000238418579D / (double)var25);
312 }
313 }
314 }
315
316 this.func_85030_a("random.bowhit", 1.0F, 1.2F / (this.rand.nextFloat() * 0.2F + 0.9F));
317 this.setDead();
318 }
319 else
320 {
321 this.motionX *= -0.10000000149011612D;
322 this.motionY *= -0.10000000149011612D;
323 this.motionZ *= -0.10000000149011612D;
324 this.rotationYaw += 180.0F;
325 this.prevRotationYaw += 180.0F;
326 this.ticksInAir = 0;
327 }
328 }
329 else
330 {
331 this.xTile = var4.blockX;
332 this.yTile = var4.blockY;
333 this.zTile = var4.blockZ;
334 this.inTile = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
335 this.inData = this.worldObj.getBlockMetadata(this.xTile, this.yTile, this.zTile);
336 this.motionX = (double)((float)(var4.hitVec.xCoord - this.posX));
337 this.motionY = (double)((float)(var4.hitVec.yCoord - this.posY));
338 this.motionZ = (double)((float)(var4.hitVec.zCoord - this.posZ));
339 var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
340 this.posX -= this.motionX / (double)var20 * 0.05000000074505806D;
341 this.posY -= this.motionY / (double)var20 * 0.05000000074505806D;
342 this.posZ -= this.motionZ / (double)var20 * 0.05000000074505806D;
343 this.func_85030_a("random.bowhit", 1.0F, 1.2F / (this.rand.nextFloat() * 0.2F + 0.9F));
344 this.inGround = true;
345 this.arrowShake = 7;
346 this.setIsCritical(false);
347
348 if (this.inTile != 0)
349 {
350 Block.blocksList[this.inTile].onEntityCollidedWithBlock(this.worldObj, this.xTile, this.yTile, this.zTile, this);
351 }
352 }
353 }
354
355 if (this.getIsCritical())
356 {
357 for (var9 = 0; var9 < 4; ++var9)
358 {
359 this.worldObj.spawnParticle("crit", this.posX + this.motionX * (double)var9 / 4.0D, this.posY + this.motionY * (double)var9 / 4.0D, this.posZ + this.motionZ * (double)var9 / 4.0D, -this.motionX, -this.motionY + 0.2D, -this.motionZ);
360 }
361 }
362
363 this.posX += this.motionX;
364 this.posY += this.motionY;
365 this.posZ += this.motionZ;
366 var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
367 this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
368
369 for (this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var20) * 180.0D / Math.PI); this.rotationPitch - this.prevRotationPitch < -180.0F; this.prevRotationPitch -= 360.0F)
370 {
371 ;
372 }
373
374 while (this.rotationPitch - this.prevRotationPitch >= 180.0F)
375 {
376 this.prevRotationPitch += 360.0F;
377 }
378
379 while (this.rotationYaw - this.prevRotationYaw < -180.0F)
380 {
381 this.prevRotationYaw -= 360.0F;
382 }
383
384 while (this.rotationYaw - this.prevRotationYaw >= 180.0F)
385 {
386 this.prevRotationYaw += 360.0F;
387 }
388
389 this.rotationPitch = this.prevRotationPitch + (this.rotationPitch - this.prevRotationPitch) * 0.2F;
390 this.rotationYaw = this.prevRotationYaw + (this.rotationYaw - this.prevRotationYaw) * 0.2F;
391 float var22 = 0.99F;
392 var11 = 0.05F;
393
394 if (this.isInWater())
395 {
396 for (int var26 = 0; var26 < 4; ++var26)
397 {
398 float var27 = 0.25F;
399 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);
400 }
401
402 var22 = 0.8F;
403 }
404
405 this.motionX *= (double)var22;
406 this.motionY *= (double)var22;
407 this.motionZ *= (double)var22;
408 this.motionY -= (double)var11;
409 this.setPosition(this.posX, this.posY, this.posZ);
410 this.doBlockCollisions();
411 }
412 }
413
414 /**
415 * (abstract) Protected helper method to write subclass entity data to NBT.
416 */
417 public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
418 {
419 par1NBTTagCompound.setShort("xTile", (short)this.xTile);
420 par1NBTTagCompound.setShort("yTile", (short)this.yTile);
421 par1NBTTagCompound.setShort("zTile", (short)this.zTile);
422 par1NBTTagCompound.setByte("inTile", (byte)this.inTile);
423 par1NBTTagCompound.setByte("inData", (byte)this.inData);
424 par1NBTTagCompound.setByte("shake", (byte)this.arrowShake);
425 par1NBTTagCompound.setByte("inGround", (byte)(this.inGround ? 1 : 0));
426 par1NBTTagCompound.setByte("pickup", (byte)this.canBePickedUp);
427 par1NBTTagCompound.setDouble("damage", this.damage);
428 }
429
430 /**
431 * (abstract) Protected helper method to read subclass entity data from NBT.
432 */
433 public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
434 {
435 this.xTile = par1NBTTagCompound.getShort("xTile");
436 this.yTile = par1NBTTagCompound.getShort("yTile");
437 this.zTile = par1NBTTagCompound.getShort("zTile");
438 this.inTile = par1NBTTagCompound.getByte("inTile") & 255;
439 this.inData = par1NBTTagCompound.getByte("inData") & 255;
440 this.arrowShake = par1NBTTagCompound.getByte("shake") & 255;
441 this.inGround = par1NBTTagCompound.getByte("inGround") == 1;
442
443 if (par1NBTTagCompound.hasKey("damage"))
444 {
445 this.damage = par1NBTTagCompound.getDouble("damage");
446 }
447
448 if (par1NBTTagCompound.hasKey("pickup"))
449 {
450 this.canBePickedUp = par1NBTTagCompound.getByte("pickup");
451 }
452 else if (par1NBTTagCompound.hasKey("player"))
453 {
454 this.canBePickedUp = par1NBTTagCompound.getBoolean("player") ? 1 : 0;
455 }
456 }
457
458 /**
459 * Called by a player entity when they collide with an entity
460 */
461 public void onCollideWithPlayer(EntityPlayer par1EntityPlayer)
462 {
463 if (!this.worldObj.isRemote && this.inGround && this.arrowShake <= 0)
464 {
465 boolean var2 = this.canBePickedUp == 1 || this.canBePickedUp == 2 && par1EntityPlayer.capabilities.isCreativeMode;
466
467 if (this.canBePickedUp == 1 && !par1EntityPlayer.inventory.addItemStackToInventory(new ItemStack(Item.arrow, 1)))
468 {
469 var2 = false;
470 }
471
472 if (var2)
473 {
474 this.func_85030_a("random.pop", 0.2F, ((this.rand.nextFloat() - this.rand.nextFloat()) * 0.7F + 1.0F) * 2.0F);
475 par1EntityPlayer.onItemPickup(this, 1);
476 this.setDead();
477 }
478 }
479 }
480
481 /**
482 * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
483 * prevent them from trampling crops
484 */
485 protected boolean canTriggerWalking()
486 {
487 return false;
488 }
489
490 @SideOnly(Side.CLIENT)
491 public float getShadowSize()
492 {
493 return 0.0F;
494 }
495
496 public void setDamage(double par1)
497 {
498 this.damage = par1;
499 }
500
501 public double getDamage()
502 {
503 return this.damage;
504 }
505
506 /**
507 * Sets the amount of knockback the arrow applies when it hits a mob.
508 */
509 public void setKnockbackStrength(int par1)
510 {
511 this.knockbackStrength = par1;
512 }
513
514 /**
515 * If returns false, the item will not inflict any damage against entities.
516 */
517 public boolean canAttackWithItem()
518 {
519 return false;
520 }
521
522 /**
523 * Whether the arrow has a stream of critical hit particles flying behind it.
524 */
525 public void setIsCritical(boolean par1)
526 {
527 byte var2 = this.dataWatcher.getWatchableObjectByte(16);
528
529 if (par1)
530 {
531 this.dataWatcher.updateObject(16, Byte.valueOf((byte)(var2 | 1)));
532 }
533 else
534 {
535 this.dataWatcher.updateObject(16, Byte.valueOf((byte)(var2 & -2)));
536 }
537 }
538
539 /**
540 * Whether the arrow has a stream of critical hit particles flying behind it.
541 */
542 public boolean getIsCritical()
543 {
544 byte var1 = this.dataWatcher.getWatchableObjectByte(16);
545 return (var1 & 1) != 0;
546 }
547 }