001package net.minecraft.entity.projectile;
002
003import cpw.mods.fml.relauncher.Side;
004import cpw.mods.fml.relauncher.SideOnly;
005import java.util.List;
006import net.minecraft.block.Block;
007import net.minecraft.enchantment.EnchantmentThorns;
008import net.minecraft.entity.Entity;
009import net.minecraft.entity.EntityLiving;
010import net.minecraft.entity.IProjectile;
011import net.minecraft.entity.monster.EntityEnderman;
012import net.minecraft.entity.player.EntityPlayer;
013import net.minecraft.entity.player.EntityPlayerMP;
014import net.minecraft.item.Item;
015import net.minecraft.item.ItemStack;
016import net.minecraft.nbt.NBTTagCompound;
017import net.minecraft.network.packet.Packet70GameEvent;
018import net.minecraft.util.AxisAlignedBB;
019import net.minecraft.util.DamageSource;
020import net.minecraft.util.MathHelper;
021import net.minecraft.util.MovingObjectPosition;
022import net.minecraft.util.Vec3;
023import net.minecraft.world.World;
024
025public class EntityArrow extends Entity implements IProjectile
026{
027    private int xTile = -1;
028    private int yTile = -1;
029    private int zTile = -1;
030    private int inTile = 0;
031    private int inData = 0;
032    private boolean inGround = false;
033
034    /** 1 if the player can pick up the arrow */
035    public int canBePickedUp = 0;
036
037    /** Seems to be some sort of timer for animating an arrow. */
038    public int arrowShake = 0;
039
040    /** The owner of this arrow. */
041    public Entity shootingEntity;
042    private int ticksInGround;
043    private int ticksInAir = 0;
044    private double damage = 2.0D;
045
046    /** The amount of knockback an arrow applies when it hits a mob. */
047    private int knockbackStrength;
048
049    public EntityArrow(World par1World)
050    {
051        super(par1World);
052        this.renderDistanceWeight = 10.0D;
053        this.setSize(0.5F, 0.5F);
054    }
055
056    public EntityArrow(World par1World, double par2, double par4, double par6)
057    {
058        super(par1World);
059        this.renderDistanceWeight = 10.0D;
060        this.setSize(0.5F, 0.5F);
061        this.setPosition(par2, par4, par6);
062        this.yOffset = 0.0F;
063    }
064
065    public EntityArrow(World par1World, EntityLiving par2EntityLiving, EntityLiving par3EntityLiving, float par4, float par5)
066    {
067        super(par1World);
068        this.renderDistanceWeight = 10.0D;
069        this.shootingEntity = par2EntityLiving;
070
071        if (par2EntityLiving instanceof EntityPlayer)
072        {
073            this.canBePickedUp = 1;
074        }
075
076        this.posY = par2EntityLiving.posY + (double)par2EntityLiving.getEyeHeight() - 0.10000000149011612D;
077        double var6 = par3EntityLiving.posX - par2EntityLiving.posX;
078        double var8 = par3EntityLiving.posY + (double)par3EntityLiving.getEyeHeight() - 0.699999988079071D - this.posY;
079        double var10 = par3EntityLiving.posZ - par2EntityLiving.posZ;
080        double var12 = (double)MathHelper.sqrt_double(var6 * var6 + var10 * var10);
081
082        if (var12 >= 1.0E-7D)
083        {
084            float var14 = (float)(Math.atan2(var10, var6) * 180.0D / Math.PI) - 90.0F;
085            float var15 = (float)(-(Math.atan2(var8, var12) * 180.0D / Math.PI));
086            double var16 = var6 / var12;
087            double var18 = var10 / var12;
088            this.setLocationAndAngles(par2EntityLiving.posX + var16, this.posY, par2EntityLiving.posZ + var18, var14, var15);
089            this.yOffset = 0.0F;
090            float var20 = (float)var12 * 0.2F;
091            this.setThrowableHeading(var6, var8 + (double)var20, var10, par4, par5);
092        }
093    }
094
095    public EntityArrow(World par1World, EntityLiving par2EntityLiving, float par3)
096    {
097        super(par1World);
098        this.renderDistanceWeight = 10.0D;
099        this.shootingEntity = par2EntityLiving;
100
101        if (par2EntityLiving instanceof EntityPlayer)
102        {
103            this.canBePickedUp = 1;
104        }
105
106        this.setSize(0.5F, 0.5F);
107        this.setLocationAndAngles(par2EntityLiving.posX, par2EntityLiving.posY + (double)par2EntityLiving.getEyeHeight(), par2EntityLiving.posZ, par2EntityLiving.rotationYaw, par2EntityLiving.rotationPitch);
108        this.posX -= (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
109        this.posY -= 0.10000000149011612D;
110        this.posZ -= (double)(MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
111        this.setPosition(this.posX, this.posY, this.posZ);
112        this.yOffset = 0.0F;
113        this.motionX = (double)(-MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI));
114        this.motionZ = (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI));
115        this.motionY = (double)(-MathHelper.sin(this.rotationPitch / 180.0F * (float)Math.PI));
116        this.setThrowableHeading(this.motionX, this.motionY, this.motionZ, par3 * 1.5F, 1.0F);
117    }
118
119    protected void entityInit()
120    {
121        this.dataWatcher.addObject(16, Byte.valueOf((byte)0));
122    }
123
124    /**
125     * Similar to setArrowHeading, it's point the throwable entity to a x, y, z direction.
126     */
127    public void setThrowableHeading(double par1, double par3, double par5, float par7, float par8)
128    {
129        float var9 = MathHelper.sqrt_double(par1 * par1 + par3 * par3 + par5 * par5);
130        par1 /= (double)var9;
131        par3 /= (double)var9;
132        par5 /= (double)var9;
133        par1 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
134        par3 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
135        par5 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
136        par1 *= (double)par7;
137        par3 *= (double)par7;
138        par5 *= (double)par7;
139        this.motionX = par1;
140        this.motionY = par3;
141        this.motionZ = par5;
142        float var10 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
143        this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
144        this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var10) * 180.0D / Math.PI);
145        this.ticksInGround = 0;
146    }
147
148    @SideOnly(Side.CLIENT)
149
150    /**
151     * Sets the position and rotation. Only difference from the other one is no bounding on the rotation. Args: posX,
152     * posY, posZ, yaw, pitch
153     */
154    public void setPositionAndRotation2(double par1, double par3, double par5, float par7, float par8, int par9)
155    {
156        this.setPosition(par1, par3, par5);
157        this.setRotation(par7, par8);
158    }
159
160    @SideOnly(Side.CLIENT)
161
162    /**
163     * Sets the velocity to the args. Args: x, y, z
164     */
165    public void setVelocity(double par1, double par3, double par5)
166    {
167        this.motionX = par1;
168        this.motionY = par3;
169        this.motionZ = par5;
170
171        if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
172        {
173            float var7 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
174            this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
175            this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var7) * 180.0D / Math.PI);
176            this.prevRotationPitch = this.rotationPitch;
177            this.prevRotationYaw = this.rotationYaw;
178            this.setLocationAndAngles(this.posX, this.posY, this.posZ, this.rotationYaw, this.rotationPitch);
179            this.ticksInGround = 0;
180        }
181    }
182
183    /**
184     * Called to update the entity's position/logic.
185     */
186    public void onUpdate()
187    {
188        super.onUpdate();
189
190        if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
191        {
192            float var1 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
193            this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
194            this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var1) * 180.0D / Math.PI);
195        }
196
197        int var16 = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
198
199        if (var16 > 0)
200        {
201            Block.blocksList[var16].setBlockBoundsBasedOnState(this.worldObj, this.xTile, this.yTile, this.zTile);
202            AxisAlignedBB var2 = Block.blocksList[var16].getCollisionBoundingBoxFromPool(this.worldObj, this.xTile, this.yTile, this.zTile);
203
204            if (var2 != null && var2.isVecInside(this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ)))
205            {
206                this.inGround = true;
207            }
208        }
209
210        if (this.arrowShake > 0)
211        {
212            --this.arrowShake;
213        }
214
215        if (this.inGround)
216        {
217            int var18 = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
218            int var19 = this.worldObj.getBlockMetadata(this.xTile, this.yTile, this.zTile);
219
220            if (var18 == this.inTile && var19 == this.inData)
221            {
222                ++this.ticksInGround;
223
224                if (this.ticksInGround == 1200)
225                {
226                    this.setDead();
227                }
228            }
229            else
230            {
231                this.inGround = false;
232                this.motionX *= (double)(this.rand.nextFloat() * 0.2F);
233                this.motionY *= (double)(this.rand.nextFloat() * 0.2F);
234                this.motionZ *= (double)(this.rand.nextFloat() * 0.2F);
235                this.ticksInGround = 0;
236                this.ticksInAir = 0;
237            }
238        }
239        else
240        {
241            ++this.ticksInAir;
242            Vec3 var17 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
243            Vec3 var3 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
244            MovingObjectPosition var4 = this.worldObj.rayTraceBlocks_do_do(var17, var3, false, true);
245            var17 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
246            var3 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
247
248            if (var4 != null)
249            {
250                var3 = this.worldObj.getWorldVec3Pool().getVecFromPool(var4.hitVec.xCoord, var4.hitVec.yCoord, var4.hitVec.zCoord);
251            }
252
253            Entity var5 = null;
254            List var6 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, this.boundingBox.addCoord(this.motionX, this.motionY, this.motionZ).expand(1.0D, 1.0D, 1.0D));
255            double var7 = 0.0D;
256            int var9;
257            float var11;
258
259            for (var9 = 0; var9 < var6.size(); ++var9)
260            {
261                Entity var10 = (Entity)var6.get(var9);
262
263                if (var10.canBeCollidedWith() && (var10 != this.shootingEntity || this.ticksInAir >= 5))
264                {
265                    var11 = 0.3F;
266                    AxisAlignedBB var12 = var10.boundingBox.expand((double)var11, (double)var11, (double)var11);
267                    MovingObjectPosition var13 = var12.calculateIntercept(var17, var3);
268
269                    if (var13 != null)
270                    {
271                        double var14 = var17.distanceTo(var13.hitVec);
272
273                        if (var14 < var7 || var7 == 0.0D)
274                        {
275                            var5 = var10;
276                            var7 = var14;
277                        }
278                    }
279                }
280            }
281
282            if (var5 != null)
283            {
284                var4 = new MovingObjectPosition(var5);
285            }
286
287            float var20;
288            float var26;
289
290            if (var4 != null)
291            {
292                if (var4.entityHit != null)
293                {
294                    var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
295                    int var23 = MathHelper.ceiling_double_int((double)var20 * this.damage);
296
297                    if (this.getIsCritical())
298                    {
299                        var23 += this.rand.nextInt(var23 / 2 + 2);
300                    }
301
302                    DamageSource var21 = null;
303
304                    if (this.shootingEntity == null)
305                    {
306                        var21 = DamageSource.causeArrowDamage(this, this);
307                    }
308                    else
309                    {
310                        var21 = DamageSource.causeArrowDamage(this, this.shootingEntity);
311                    }
312
313                    if (this.isBurning() && !(var4.entityHit instanceof EntityEnderman))
314                    {
315                        var4.entityHit.setFire(5);
316                    }
317
318                    if (var4.entityHit.attackEntityFrom(var21, var23))
319                    {
320                        if (var4.entityHit instanceof EntityLiving)
321                        {
322                            EntityLiving var24 = (EntityLiving)var4.entityHit;
323
324                            if (!this.worldObj.isRemote)
325                            {
326                                var24.setArrowCountInEntity(var24.getArrowCountInEntity() + 1);
327                            }
328
329                            if (this.knockbackStrength > 0)
330                            {
331                                var26 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
332
333                                if (var26 > 0.0F)
334                                {
335                                    var4.entityHit.addVelocity(this.motionX * (double)this.knockbackStrength * 0.6000000238418579D / (double)var26, 0.1D, this.motionZ * (double)this.knockbackStrength * 0.6000000238418579D / (double)var26);
336                                }
337                            }
338
339                            if (this.shootingEntity != null)
340                            {
341                                EnchantmentThorns.func_92096_a(this.shootingEntity, var24, this.rand);
342                            }
343
344                            if (this.shootingEntity != null && var4.entityHit != this.shootingEntity && var4.entityHit instanceof EntityPlayer && this.shootingEntity instanceof EntityPlayerMP)
345                            {
346                                ((EntityPlayerMP)this.shootingEntity).playerNetServerHandler.sendPacketToPlayer(new Packet70GameEvent(6, 0));
347                            }
348                        }
349
350                        this.playSound("random.bowhit", 1.0F, 1.2F / (this.rand.nextFloat() * 0.2F + 0.9F));
351
352                        if (!(var4.entityHit instanceof EntityEnderman))
353                        {
354                            this.setDead();
355                        }
356                    }
357                    else
358                    {
359                        this.motionX *= -0.10000000149011612D;
360                        this.motionY *= -0.10000000149011612D;
361                        this.motionZ *= -0.10000000149011612D;
362                        this.rotationYaw += 180.0F;
363                        this.prevRotationYaw += 180.0F;
364                        this.ticksInAir = 0;
365                    }
366                }
367                else
368                {
369                    this.xTile = var4.blockX;
370                    this.yTile = var4.blockY;
371                    this.zTile = var4.blockZ;
372                    this.inTile = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
373                    this.inData = this.worldObj.getBlockMetadata(this.xTile, this.yTile, this.zTile);
374                    this.motionX = (double)((float)(var4.hitVec.xCoord - this.posX));
375                    this.motionY = (double)((float)(var4.hitVec.yCoord - this.posY));
376                    this.motionZ = (double)((float)(var4.hitVec.zCoord - this.posZ));
377                    var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
378                    this.posX -= this.motionX / (double)var20 * 0.05000000074505806D;
379                    this.posY -= this.motionY / (double)var20 * 0.05000000074505806D;
380                    this.posZ -= this.motionZ / (double)var20 * 0.05000000074505806D;
381                    this.playSound("random.bowhit", 1.0F, 1.2F / (this.rand.nextFloat() * 0.2F + 0.9F));
382                    this.inGround = true;
383                    this.arrowShake = 7;
384                    this.setIsCritical(false);
385
386                    if (this.inTile != 0)
387                    {
388                        Block.blocksList[this.inTile].onEntityCollidedWithBlock(this.worldObj, this.xTile, this.yTile, this.zTile, this);
389                    }
390                }
391            }
392
393            if (this.getIsCritical())
394            {
395                for (var9 = 0; var9 < 4; ++var9)
396                {
397                    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);
398                }
399            }
400
401            this.posX += this.motionX;
402            this.posY += this.motionY;
403            this.posZ += this.motionZ;
404            var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
405            this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
406
407            for (this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var20) * 180.0D / Math.PI); this.rotationPitch - this.prevRotationPitch < -180.0F; this.prevRotationPitch -= 360.0F)
408            {
409                ;
410            }
411
412            while (this.rotationPitch - this.prevRotationPitch >= 180.0F)
413            {
414                this.prevRotationPitch += 360.0F;
415            }
416
417            while (this.rotationYaw - this.prevRotationYaw < -180.0F)
418            {
419                this.prevRotationYaw -= 360.0F;
420            }
421
422            while (this.rotationYaw - this.prevRotationYaw >= 180.0F)
423            {
424                this.prevRotationYaw += 360.0F;
425            }
426
427            this.rotationPitch = this.prevRotationPitch + (this.rotationPitch - this.prevRotationPitch) * 0.2F;
428            this.rotationYaw = this.prevRotationYaw + (this.rotationYaw - this.prevRotationYaw) * 0.2F;
429            float var22 = 0.99F;
430            var11 = 0.05F;
431
432            if (this.isInWater())
433            {
434                for (int var25 = 0; var25 < 4; ++var25)
435                {
436                    var26 = 0.25F;
437                    this.worldObj.spawnParticle("bubble", this.posX - this.motionX * (double)var26, this.posY - this.motionY * (double)var26, this.posZ - this.motionZ * (double)var26, this.motionX, this.motionY, this.motionZ);
438                }
439
440                var22 = 0.8F;
441            }
442
443            this.motionX *= (double)var22;
444            this.motionY *= (double)var22;
445            this.motionZ *= (double)var22;
446            this.motionY -= (double)var11;
447            this.setPosition(this.posX, this.posY, this.posZ);
448            this.doBlockCollisions();
449        }
450    }
451
452    /**
453     * (abstract) Protected helper method to write subclass entity data to NBT.
454     */
455    public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
456    {
457        par1NBTTagCompound.setShort("xTile", (short)this.xTile);
458        par1NBTTagCompound.setShort("yTile", (short)this.yTile);
459        par1NBTTagCompound.setShort("zTile", (short)this.zTile);
460        par1NBTTagCompound.setByte("inTile", (byte)this.inTile);
461        par1NBTTagCompound.setByte("inData", (byte)this.inData);
462        par1NBTTagCompound.setByte("shake", (byte)this.arrowShake);
463        par1NBTTagCompound.setByte("inGround", (byte)(this.inGround ? 1 : 0));
464        par1NBTTagCompound.setByte("pickup", (byte)this.canBePickedUp);
465        par1NBTTagCompound.setDouble("damage", this.damage);
466    }
467
468    /**
469     * (abstract) Protected helper method to read subclass entity data from NBT.
470     */
471    public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
472    {
473        this.xTile = par1NBTTagCompound.getShort("xTile");
474        this.yTile = par1NBTTagCompound.getShort("yTile");
475        this.zTile = par1NBTTagCompound.getShort("zTile");
476        this.inTile = par1NBTTagCompound.getByte("inTile") & 255;
477        this.inData = par1NBTTagCompound.getByte("inData") & 255;
478        this.arrowShake = par1NBTTagCompound.getByte("shake") & 255;
479        this.inGround = par1NBTTagCompound.getByte("inGround") == 1;
480
481        if (par1NBTTagCompound.hasKey("damage"))
482        {
483            this.damage = par1NBTTagCompound.getDouble("damage");
484        }
485
486        if (par1NBTTagCompound.hasKey("pickup"))
487        {
488            this.canBePickedUp = par1NBTTagCompound.getByte("pickup");
489        }
490        else if (par1NBTTagCompound.hasKey("player"))
491        {
492            this.canBePickedUp = par1NBTTagCompound.getBoolean("player") ? 1 : 0;
493        }
494    }
495
496    /**
497     * Called by a player entity when they collide with an entity
498     */
499    public void onCollideWithPlayer(EntityPlayer par1EntityPlayer)
500    {
501        if (!this.worldObj.isRemote && this.inGround && this.arrowShake <= 0)
502        {
503            boolean var2 = this.canBePickedUp == 1 || this.canBePickedUp == 2 && par1EntityPlayer.capabilities.isCreativeMode;
504
505            if (this.canBePickedUp == 1 && !par1EntityPlayer.inventory.addItemStackToInventory(new ItemStack(Item.arrow, 1)))
506            {
507                var2 = false;
508            }
509
510            if (var2)
511            {
512                this.playSound("random.pop", 0.2F, ((this.rand.nextFloat() - this.rand.nextFloat()) * 0.7F + 1.0F) * 2.0F);
513                par1EntityPlayer.onItemPickup(this, 1);
514                this.setDead();
515            }
516        }
517    }
518
519    /**
520     * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
521     * prevent them from trampling crops
522     */
523    protected boolean canTriggerWalking()
524    {
525        return false;
526    }
527
528    @SideOnly(Side.CLIENT)
529    public float getShadowSize()
530    {
531        return 0.0F;
532    }
533
534    public void setDamage(double par1)
535    {
536        this.damage = par1;
537    }
538
539    public double getDamage()
540    {
541        return this.damage;
542    }
543
544    /**
545     * Sets the amount of knockback the arrow applies when it hits a mob.
546     */
547    public void setKnockbackStrength(int par1)
548    {
549        this.knockbackStrength = par1;
550    }
551
552    /**
553     * If returns false, the item will not inflict any damage against entities.
554     */
555    public boolean canAttackWithItem()
556    {
557        return false;
558    }
559
560    /**
561     * Whether the arrow has a stream of critical hit particles flying behind it.
562     */
563    public void setIsCritical(boolean par1)
564    {
565        byte var2 = this.dataWatcher.getWatchableObjectByte(16);
566
567        if (par1)
568        {
569            this.dataWatcher.updateObject(16, Byte.valueOf((byte)(var2 | 1)));
570        }
571        else
572        {
573            this.dataWatcher.updateObject(16, Byte.valueOf((byte)(var2 & -2)));
574        }
575    }
576
577    /**
578     * Whether the arrow has a stream of critical hit particles flying behind it.
579     */
580    public boolean getIsCritical()
581    {
582        byte var1 = this.dataWatcher.getWatchableObjectByte(16);
583        return (var1 & 1) != 0;
584    }
585}