001 package net.minecraft.entity.projectile;
002
003 import cpw.mods.fml.common.Side;
004 import cpw.mods.fml.common.asm.SideOnly;
005 import java.util.List;
006 import net.minecraft.block.Block;
007 import net.minecraft.entity.Entity;
008 import net.minecraft.entity.EntityLiving;
009 import net.minecraft.entity.IProjectile;
010 import net.minecraft.entity.player.EntityPlayer;
011 import net.minecraft.item.Item;
012 import net.minecraft.item.ItemStack;
013 import net.minecraft.nbt.NBTTagCompound;
014 import net.minecraft.util.AxisAlignedBB;
015 import net.minecraft.util.DamageSource;
016 import net.minecraft.util.MathHelper;
017 import net.minecraft.util.MovingObjectPosition;
018 import net.minecraft.util.Vec3;
019 import net.minecraft.world.World;
020
021 public class EntityArrow extends Entity implements IProjectile
022 {
023 private int xTile = -1;
024 private int yTile = -1;
025 private int zTile = -1;
026 private int inTile = 0;
027 private int inData = 0;
028 private boolean inGround = false;
029
030 /** 1 if the player can pick up the arrow */
031 public int canBePickedUp = 0;
032
033 /** Seems to be some sort of timer for animating an arrow. */
034 public int arrowShake = 0;
035
036 /** The owner of this arrow. */
037 public Entity shootingEntity;
038 private int ticksInGround;
039 private int ticksInAir = 0;
040 private double damage = 2.0D;
041
042 /** The amount of knockback an arrow applies when it hits a mob. */
043 private int knockbackStrength;
044
045 public EntityArrow(World par1World)
046 {
047 super(par1World);
048 this.setSize(0.5F, 0.5F);
049 }
050
051 public EntityArrow(World par1World, double par2, double par4, double par6)
052 {
053 super(par1World);
054 this.setSize(0.5F, 0.5F);
055 this.setPosition(par2, par4, par6);
056 this.yOffset = 0.0F;
057 }
058
059 public EntityArrow(World par1World, EntityLiving par2EntityLiving, EntityLiving par3EntityLiving, float par4, float par5)
060 {
061 super(par1World);
062 this.shootingEntity = par2EntityLiving;
063
064 if (par2EntityLiving instanceof EntityPlayer)
065 {
066 this.canBePickedUp = 1;
067 }
068
069 this.posY = par2EntityLiving.posY + (double)par2EntityLiving.getEyeHeight() - 0.10000000149011612D;
070 double var6 = par3EntityLiving.posX - par2EntityLiving.posX;
071 double var8 = par3EntityLiving.posY + (double)par3EntityLiving.getEyeHeight() - 0.699999988079071D - this.posY;
072 double var10 = par3EntityLiving.posZ - par2EntityLiving.posZ;
073 double var12 = (double)MathHelper.sqrt_double(var6 * var6 + var10 * var10);
074
075 if (var12 >= 1.0E-7D)
076 {
077 float var14 = (float)(Math.atan2(var10, var6) * 180.0D / Math.PI) - 90.0F;
078 float var15 = (float)(-(Math.atan2(var8, var12) * 180.0D / Math.PI));
079 double var16 = var6 / var12;
080 double var18 = var10 / var12;
081 this.setLocationAndAngles(par2EntityLiving.posX + var16, this.posY, par2EntityLiving.posZ + var18, var14, var15);
082 this.yOffset = 0.0F;
083 float var20 = (float)var12 * 0.2F;
084 this.setThrowableHeading(var6, var8 + (double)var20, var10, par4, par5);
085 }
086 }
087
088 public EntityArrow(World par1World, EntityLiving par2EntityLiving, float par3)
089 {
090 super(par1World);
091 this.shootingEntity = par2EntityLiving;
092
093 if (par2EntityLiving instanceof EntityPlayer)
094 {
095 this.canBePickedUp = 1;
096 }
097
098 this.setSize(0.5F, 0.5F);
099 this.setLocationAndAngles(par2EntityLiving.posX, par2EntityLiving.posY + (double)par2EntityLiving.getEyeHeight(), par2EntityLiving.posZ, par2EntityLiving.rotationYaw, par2EntityLiving.rotationPitch);
100 this.posX -= (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
101 this.posY -= 0.10000000149011612D;
102 this.posZ -= (double)(MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
103 this.setPosition(this.posX, this.posY, this.posZ);
104 this.yOffset = 0.0F;
105 this.motionX = (double)(-MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI));
106 this.motionZ = (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI));
107 this.motionY = (double)(-MathHelper.sin(this.rotationPitch / 180.0F * (float)Math.PI));
108 this.setThrowableHeading(this.motionX, this.motionY, this.motionZ, par3 * 1.5F, 1.0F);
109 }
110
111 protected void entityInit()
112 {
113 this.dataWatcher.addObject(16, Byte.valueOf((byte)0));
114 }
115
116 /**
117 * Similar to setArrowHeading, it's point the throwable entity to a x, y, z direction.
118 */
119 public void setThrowableHeading(double par1, double par3, double par5, float par7, float par8)
120 {
121 float var9 = MathHelper.sqrt_double(par1 * par1 + par3 * par3 + par5 * par5);
122 par1 /= (double)var9;
123 par3 /= (double)var9;
124 par5 /= (double)var9;
125 par1 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
126 par3 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
127 par5 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
128 par1 *= (double)par7;
129 par3 *= (double)par7;
130 par5 *= (double)par7;
131 this.motionX = par1;
132 this.motionY = par3;
133 this.motionZ = par5;
134 float var10 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
135 this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
136 this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var10) * 180.0D / Math.PI);
137 this.ticksInGround = 0;
138 }
139
140 @SideOnly(Side.CLIENT)
141
142 /**
143 * Sets the position and rotation. Only difference from the other one is no bounding on the rotation. Args: posX,
144 * posY, posZ, yaw, pitch
145 */
146 public void setPositionAndRotation2(double par1, double par3, double par5, float par7, float par8, int par9)
147 {
148 this.setPosition(par1, par3, par5);
149 this.setRotation(par7, par8);
150 }
151
152 @SideOnly(Side.CLIENT)
153
154 /**
155 * Sets the velocity to the args. Args: x, y, z
156 */
157 public void setVelocity(double par1, double par3, double par5)
158 {
159 this.motionX = par1;
160 this.motionY = par3;
161 this.motionZ = par5;
162
163 if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
164 {
165 float var7 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
166 this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
167 this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var7) * 180.0D / Math.PI);
168 this.prevRotationPitch = this.rotationPitch;
169 this.prevRotationYaw = this.rotationYaw;
170 this.setLocationAndAngles(this.posX, this.posY, this.posZ, this.rotationYaw, this.rotationPitch);
171 this.ticksInGround = 0;
172 }
173 }
174
175 /**
176 * Called to update the entity's position/logic.
177 */
178 public void onUpdate()
179 {
180 super.onUpdate();
181
182 if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
183 {
184 float var1 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
185 this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
186 this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var1) * 180.0D / Math.PI);
187 }
188
189 int var16 = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
190
191 if (var16 > 0)
192 {
193 Block.blocksList[var16].setBlockBoundsBasedOnState(this.worldObj, this.xTile, this.yTile, this.zTile);
194 AxisAlignedBB var2 = Block.blocksList[var16].getCollisionBoundingBoxFromPool(this.worldObj, this.xTile, this.yTile, this.zTile);
195
196 if (var2 != null && var2.isVecInside(this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ)))
197 {
198 this.inGround = true;
199 }
200 }
201
202 if (this.arrowShake > 0)
203 {
204 --this.arrowShake;
205 }
206
207 if (this.inGround)
208 {
209 int var18 = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
210 int var19 = this.worldObj.getBlockMetadata(this.xTile, this.yTile, this.zTile);
211
212 if (var18 == this.inTile && var19 == this.inData)
213 {
214 ++this.ticksInGround;
215
216 if (this.ticksInGround == 1200)
217 {
218 this.setDead();
219 }
220 }
221 else
222 {
223 this.inGround = false;
224 this.motionX *= (double)(this.rand.nextFloat() * 0.2F);
225 this.motionY *= (double)(this.rand.nextFloat() * 0.2F);
226 this.motionZ *= (double)(this.rand.nextFloat() * 0.2F);
227 this.ticksInGround = 0;
228 this.ticksInAir = 0;
229 }
230 }
231 else
232 {
233 ++this.ticksInAir;
234 Vec3 var17 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
235 Vec3 var3 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
236 MovingObjectPosition var4 = this.worldObj.rayTraceBlocks_do_do(var17, var3, false, true);
237 var17 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
238 var3 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
239
240 if (var4 != null)
241 {
242 var3 = this.worldObj.getWorldVec3Pool().getVecFromPool(var4.hitVec.xCoord, var4.hitVec.yCoord, var4.hitVec.zCoord);
243 }
244
245 Entity var5 = null;
246 List var6 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, this.boundingBox.addCoord(this.motionX, this.motionY, this.motionZ).expand(1.0D, 1.0D, 1.0D));
247 double var7 = 0.0D;
248 int var9;
249 float var11;
250
251 for (var9 = 0; var9 < var6.size(); ++var9)
252 {
253 Entity var10 = (Entity)var6.get(var9);
254
255 if (var10.canBeCollidedWith() && (var10 != this.shootingEntity || this.ticksInAir >= 5))
256 {
257 var11 = 0.3F;
258 AxisAlignedBB var12 = var10.boundingBox.expand((double)var11, (double)var11, (double)var11);
259 MovingObjectPosition var13 = var12.calculateIntercept(var17, var3);
260
261 if (var13 != null)
262 {
263 double var14 = var17.distanceTo(var13.hitVec);
264
265 if (var14 < var7 || var7 == 0.0D)
266 {
267 var5 = var10;
268 var7 = var14;
269 }
270 }
271 }
272 }
273
274 if (var5 != null)
275 {
276 var4 = new MovingObjectPosition(var5);
277 }
278
279 float var20;
280
281 if (var4 != null)
282 {
283 if (var4.entityHit != null)
284 {
285 var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
286 int var23 = MathHelper.ceiling_double_int((double)var20 * this.damage);
287
288 if (this.getIsCritical())
289 {
290 var23 += this.rand.nextInt(var23 / 2 + 2);
291 }
292
293 DamageSource var21 = null;
294
295 if (this.shootingEntity == null)
296 {
297 var21 = DamageSource.causeArrowDamage(this, this);
298 }
299 else
300 {
301 var21 = DamageSource.causeArrowDamage(this, this.shootingEntity);
302 }
303
304 if (this.isBurning())
305 {
306 var4.entityHit.setFire(5);
307 }
308
309 if (var4.entityHit.attackEntityFrom(var21, var23))
310 {
311 if (var4.entityHit instanceof EntityLiving)
312 {
313 if (!this.worldObj.isRemote)
314 {
315 EntityLiving var24 = (EntityLiving)var4.entityHit;
316 var24.func_85034_r(var24.func_85035_bI() + 1);
317 }
318
319 if (this.knockbackStrength > 0)
320 {
321 float var25 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
322
323 if (var25 > 0.0F)
324 {
325 var4.entityHit.addVelocity(this.motionX * (double)this.knockbackStrength * 0.6000000238418579D / (double)var25, 0.1D, this.motionZ * (double)this.knockbackStrength * 0.6000000238418579D / (double)var25);
326 }
327 }
328 }
329
330 this.func_85030_a("random.bowhit", 1.0F, 1.2F / (this.rand.nextFloat() * 0.2F + 0.9F));
331 this.setDead();
332 }
333 else
334 {
335 this.motionX *= -0.10000000149011612D;
336 this.motionY *= -0.10000000149011612D;
337 this.motionZ *= -0.10000000149011612D;
338 this.rotationYaw += 180.0F;
339 this.prevRotationYaw += 180.0F;
340 this.ticksInAir = 0;
341 }
342 }
343 else
344 {
345 this.xTile = var4.blockX;
346 this.yTile = var4.blockY;
347 this.zTile = var4.blockZ;
348 this.inTile = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
349 this.inData = this.worldObj.getBlockMetadata(this.xTile, this.yTile, this.zTile);
350 this.motionX = (double)((float)(var4.hitVec.xCoord - this.posX));
351 this.motionY = (double)((float)(var4.hitVec.yCoord - this.posY));
352 this.motionZ = (double)((float)(var4.hitVec.zCoord - this.posZ));
353 var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
354 this.posX -= this.motionX / (double)var20 * 0.05000000074505806D;
355 this.posY -= this.motionY / (double)var20 * 0.05000000074505806D;
356 this.posZ -= this.motionZ / (double)var20 * 0.05000000074505806D;
357 this.func_85030_a("random.bowhit", 1.0F, 1.2F / (this.rand.nextFloat() * 0.2F + 0.9F));
358 this.inGround = true;
359 this.arrowShake = 7;
360 this.setIsCritical(false);
361
362 if (this.inTile != 0)
363 {
364 Block.blocksList[this.inTile].onEntityCollidedWithBlock(this.worldObj, this.xTile, this.yTile, this.zTile, this);
365 }
366 }
367 }
368
369 if (this.getIsCritical())
370 {
371 for (var9 = 0; var9 < 4; ++var9)
372 {
373 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);
374 }
375 }
376
377 this.posX += this.motionX;
378 this.posY += this.motionY;
379 this.posZ += this.motionZ;
380 var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
381 this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
382
383 for (this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var20) * 180.0D / Math.PI); this.rotationPitch - this.prevRotationPitch < -180.0F; this.prevRotationPitch -= 360.0F)
384 {
385 ;
386 }
387
388 while (this.rotationPitch - this.prevRotationPitch >= 180.0F)
389 {
390 this.prevRotationPitch += 360.0F;
391 }
392
393 while (this.rotationYaw - this.prevRotationYaw < -180.0F)
394 {
395 this.prevRotationYaw -= 360.0F;
396 }
397
398 while (this.rotationYaw - this.prevRotationYaw >= 180.0F)
399 {
400 this.prevRotationYaw += 360.0F;
401 }
402
403 this.rotationPitch = this.prevRotationPitch + (this.rotationPitch - this.prevRotationPitch) * 0.2F;
404 this.rotationYaw = this.prevRotationYaw + (this.rotationYaw - this.prevRotationYaw) * 0.2F;
405 float var22 = 0.99F;
406 var11 = 0.05F;
407
408 if (this.isInWater())
409 {
410 for (int var26 = 0; var26 < 4; ++var26)
411 {
412 float var27 = 0.25F;
413 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);
414 }
415
416 var22 = 0.8F;
417 }
418
419 this.motionX *= (double)var22;
420 this.motionY *= (double)var22;
421 this.motionZ *= (double)var22;
422 this.motionY -= (double)var11;
423 this.setPosition(this.posX, this.posY, this.posZ);
424 this.doBlockCollisions();
425 }
426 }
427
428 /**
429 * (abstract) Protected helper method to write subclass entity data to NBT.
430 */
431 public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
432 {
433 par1NBTTagCompound.setShort("xTile", (short)this.xTile);
434 par1NBTTagCompound.setShort("yTile", (short)this.yTile);
435 par1NBTTagCompound.setShort("zTile", (short)this.zTile);
436 par1NBTTagCompound.setByte("inTile", (byte)this.inTile);
437 par1NBTTagCompound.setByte("inData", (byte)this.inData);
438 par1NBTTagCompound.setByte("shake", (byte)this.arrowShake);
439 par1NBTTagCompound.setByte("inGround", (byte)(this.inGround ? 1 : 0));
440 par1NBTTagCompound.setByte("pickup", (byte)this.canBePickedUp);
441 par1NBTTagCompound.setDouble("damage", this.damage);
442 }
443
444 /**
445 * (abstract) Protected helper method to read subclass entity data from NBT.
446 */
447 public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
448 {
449 this.xTile = par1NBTTagCompound.getShort("xTile");
450 this.yTile = par1NBTTagCompound.getShort("yTile");
451 this.zTile = par1NBTTagCompound.getShort("zTile");
452 this.inTile = par1NBTTagCompound.getByte("inTile") & 255;
453 this.inData = par1NBTTagCompound.getByte("inData") & 255;
454 this.arrowShake = par1NBTTagCompound.getByte("shake") & 255;
455 this.inGround = par1NBTTagCompound.getByte("inGround") == 1;
456
457 if (par1NBTTagCompound.hasKey("damage"))
458 {
459 this.damage = par1NBTTagCompound.getDouble("damage");
460 }
461
462 if (par1NBTTagCompound.hasKey("pickup"))
463 {
464 this.canBePickedUp = par1NBTTagCompound.getByte("pickup");
465 }
466 else if (par1NBTTagCompound.hasKey("player"))
467 {
468 this.canBePickedUp = par1NBTTagCompound.getBoolean("player") ? 1 : 0;
469 }
470 }
471
472 /**
473 * Called by a player entity when they collide with an entity
474 */
475 public void onCollideWithPlayer(EntityPlayer par1EntityPlayer)
476 {
477 if (!this.worldObj.isRemote && this.inGround && this.arrowShake <= 0)
478 {
479 boolean var2 = this.canBePickedUp == 1 || this.canBePickedUp == 2 && par1EntityPlayer.capabilities.isCreativeMode;
480
481 if (this.canBePickedUp == 1 && !par1EntityPlayer.inventory.addItemStackToInventory(new ItemStack(Item.arrow, 1)))
482 {
483 var2 = false;
484 }
485
486 if (var2)
487 {
488 this.func_85030_a("random.pop", 0.2F, ((this.rand.nextFloat() - this.rand.nextFloat()) * 0.7F + 1.0F) * 2.0F);
489 par1EntityPlayer.onItemPickup(this, 1);
490 this.setDead();
491 }
492 }
493 }
494
495 /**
496 * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
497 * prevent them from trampling crops
498 */
499 protected boolean canTriggerWalking()
500 {
501 return false;
502 }
503
504 @SideOnly(Side.CLIENT)
505 public float getShadowSize()
506 {
507 return 0.0F;
508 }
509
510 public void setDamage(double par1)
511 {
512 this.damage = par1;
513 }
514
515 public double getDamage()
516 {
517 return this.damage;
518 }
519
520 /**
521 * Sets the amount of knockback the arrow applies when it hits a mob.
522 */
523 public void setKnockbackStrength(int par1)
524 {
525 this.knockbackStrength = par1;
526 }
527
528 /**
529 * If returns false, the item will not inflict any damage against entities.
530 */
531 public boolean canAttackWithItem()
532 {
533 return false;
534 }
535
536 /**
537 * Whether the arrow has a stream of critical hit particles flying behind it.
538 */
539 public void setIsCritical(boolean par1)
540 {
541 byte var2 = this.dataWatcher.getWatchableObjectByte(16);
542
543 if (par1)
544 {
545 this.dataWatcher.updateObject(16, Byte.valueOf((byte)(var2 | 1)));
546 }
547 else
548 {
549 this.dataWatcher.updateObject(16, Byte.valueOf((byte)(var2 & -2)));
550 }
551 }
552
553 /**
554 * Whether the arrow has a stream of critical hit particles flying behind it.
555 */
556 public boolean getIsCritical()
557 {
558 byte var1 = this.dataWatcher.getWatchableObjectByte(16);
559 return (var1 & 1) != 0;
560 }
561 }