    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.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                                ++((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    }