    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
    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.setArrowHeading(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.setArrowHeading(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         * Uses the provided coordinates as a heading and determines the velocity from it with the set force and random
    105         * variance. Args: x, y, z, force, forceVariation
    106         */
    107        public void setArrowHeading(double par1, double par3, double par5, float par7, float par8)
    108        {
    109            float var9 = MathHelper.sqrt_double(par1 * par1 + par3 * par3 + par5 * par5);
    110            par1 /= (double)var9;
    111            par3 /= (double)var9;
    112            par5 /= (double)var9;
    113            par1 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
    114            par3 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
    115            par5 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
    116            par1 *= (double)par7;
    117            par3 *= (double)par7;
    118            par5 *= (double)par7;
    119            this.motionX = par1;
    120            this.motionY = par3;
    121            this.motionZ = par5;
    122            float var10 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
    123            this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
    124            this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var10) * 180.0D / Math.PI);
    125            this.ticksInGround = 0;
    126        }
    127
    128        @SideOnly(Side.CLIENT)
    129
    130        /**
    131         * Sets the position and rotation. Only difference from the other one is no bounding on the rotation. Args: posX,
    132         * posY, posZ, yaw, pitch
    133         */
    134        public void setPositionAndRotation2(double par1, double par3, double par5, float par7, float par8, int par9)
    135        {
    136            this.setPosition(par1, par3, par5);
    137            this.setRotation(par7, par8);
    138        }
    139
    140        @SideOnly(Side.CLIENT)
    141
    142        /**
    143         * Sets the velocity to the args. Args: x, y, z
    144         */
    145        public void setVelocity(double par1, double par3, double par5)
    146        {
    147            this.motionX = par1;
    148            this.motionY = par3;
    149            this.motionZ = par5;
    150
    151            if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
    152            {
    153                float var7 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
    154                this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
    155                this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var7) * 180.0D / Math.PI);
    156                this.prevRotationPitch = this.rotationPitch;
    157                this.prevRotationYaw = this.rotationYaw;
    158                this.setLocationAndAngles(this.posX, this.posY, this.posZ, this.rotationYaw, this.rotationPitch);
    159                this.ticksInGround = 0;
    160            }
    161        }
    162
    163        /**
    164         * Called to update the entity's position/logic.
    165         */
    166        public void onUpdate()
    167        {
    168            super.onUpdate();
    169
    170            if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
    171            {
    172                float var1 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
    173                this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
    174                this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var1) * 180.0D / Math.PI);
    175            }
    176
    177            int var16 = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
    178
    179            if (var16 > 0)
    180            {
    181                Block.blocksList[var16].setBlockBoundsBasedOnState(this.worldObj, this.xTile, this.yTile, this.zTile);
    182                AxisAlignedBB var2 = Block.blocksList[var16].getCollisionBoundingBoxFromPool(this.worldObj, this.xTile, this.yTile, this.zTile);
    183
    184                if (var2 != null && var2.isVecInside(Vec3.getVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ)))
    185                {
    186                    this.inGround = true;
    187                }
    188            }
    189
    190            if (this.arrowShake > 0)
    191            {
    192                --this.arrowShake;
    193            }
    194
    195            if (this.inGround)
    196            {
    197                int var18 = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
    198                int var19 = this.worldObj.getBlockMetadata(this.xTile, this.yTile, this.zTile);
    199
    200                if (var18 == this.inTile && var19 == this.inData)
    201                {
    202                    ++this.ticksInGround;
    203
    204                    if (this.ticksInGround == 1200)
    205                    {
    206                        this.setDead();
    207                    }
    208                }
    209                else
    210                {
    211                    this.inGround = false;
    212                    this.motionX *= (double)(this.rand.nextFloat() * 0.2F);
    213                    this.motionY *= (double)(this.rand.nextFloat() * 0.2F);
    214                    this.motionZ *= (double)(this.rand.nextFloat() * 0.2F);
    215                    this.ticksInGround = 0;
    216                    this.ticksInAir = 0;
    217                }
    218            }
    219            else
    220            {
    221                ++this.ticksInAir;
    222                Vec3 var17 = Vec3.getVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
    223                Vec3 var3 = Vec3.getVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
    224                MovingObjectPosition var4 = this.worldObj.rayTraceBlocks_do_do(var17, var3, false, true);
    225                var17 = Vec3.getVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
    226                var3 = Vec3.getVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
    227
    228                if (var4 != null)
    229                {
    230                    var3 = Vec3.getVec3Pool().getVecFromPool(var4.hitVec.xCoord, var4.hitVec.yCoord, var4.hitVec.zCoord);
    231                }
    232
    233                Entity var5 = null;
    234                List var6 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, this.boundingBox.addCoord(this.motionX, this.motionY, this.motionZ).expand(1.0D, 1.0D, 1.0D));
    235                double var7 = 0.0D;
    236                Iterator var9 = var6.iterator();
    237                float var11;
    238
    239                while (var9.hasNext())
    240                {
    241                    Entity var10 = (Entity)var9.next();
    242
    243                    if (var10.canBeCollidedWith() && (var10 != this.shootingEntity || this.ticksInAir >= 5))
    244                    {
    245                        var11 = 0.3F;
    246                        AxisAlignedBB var12 = var10.boundingBox.expand((double)var11, (double)var11, (double)var11);
    247                        MovingObjectPosition var13 = var12.calculateIntercept(var17, var3);
    248
    249                        if (var13 != null)
    250                        {
    251                            double var14 = var17.distanceTo(var13.hitVec);
    252
    253                            if (var14 < var7 || var7 == 0.0D)
    254                            {
    255                                var5 = var10;
    256                                var7 = var14;
    257                            }
    258                        }
    259                    }
    260                }
    261
    262                if (var5 != null)
    263                {
    264                    var4 = new MovingObjectPosition(var5);
    265                }
    266
    267                float var20;
    268
    269                if (var4 != null)
    270                {
    271                    if (var4.entityHit != null)
    272                    {
    273                        var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
    274                        int var24 = MathHelper.ceiling_double_int((double)var20 * this.damage);
    275
    276                        if (this.func_70241_g())
    277                        {
    278                            var24 += this.rand.nextInt(var24 / 2 + 2);
    279                        }
    280
    281                        DamageSource var22 = null;
    282
    283                        if (this.shootingEntity == null)
    284                        {
    285                            var22 = DamageSource.causeArrowDamage(this, this);
    286                        }
    287                        else
    288                        {
    289                            var22 = DamageSource.causeArrowDamage(this, this.shootingEntity);
    290                        }
    291
    292                        if (this.isBurning())
    293                        {
    294                            var4.entityHit.setFire(5);
    295                        }
    296
    297                        if (var4.entityHit.attackEntityFrom(var22, var24))
    298                        {
    299                            if (var4.entityHit instanceof EntityLiving)
    300                            {
    301                                ++((EntityLiving)var4.entityHit).arrowHitTempCounter;
    302
    303                                if (this.knockbackStrength > 0)
    304                                {
    305                                    float var25 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
    306
    307                                    if (var25 > 0.0F)
    308                                    {
    309                                        var4.entityHit.addVelocity(this.motionX * (double)this.knockbackStrength * 0.6000000238418579D / (double)var25, 0.1D, this.motionZ * (double)this.knockbackStrength * 0.6000000238418579D / (double)var25);
    310                                    }
    311                                }
    312                            }
    313
    314                            this.worldObj.playSoundAtEntity(this, "random.bowhit", 1.0F, 1.2F / (this.rand.nextFloat() * 0.2F + 0.9F));
    315                            this.setDead();
    316                        }
    317                        else
    318                        {
    319                            this.motionX *= -0.10000000149011612D;
    320                            this.motionY *= -0.10000000149011612D;
    321                            this.motionZ *= -0.10000000149011612D;
    322                            this.rotationYaw += 180.0F;
    323                            this.prevRotationYaw += 180.0F;
    324                            this.ticksInAir = 0;
    325                        }
    326                    }
    327                    else
    328                    {
    329                        this.xTile = var4.blockX;
    330                        this.yTile = var4.blockY;
    331                        this.zTile = var4.blockZ;
    332                        this.inTile = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
    333                        this.inData = this.worldObj.getBlockMetadata(this.xTile, this.yTile, this.zTile);
    334                        this.motionX = (double)((float)(var4.hitVec.xCoord - this.posX));
    335                        this.motionY = (double)((float)(var4.hitVec.yCoord - this.posY));
    336                        this.motionZ = (double)((float)(var4.hitVec.zCoord - this.posZ));
    337                        var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
    338                        this.posX -= this.motionX / (double)var20 * 0.05000000074505806D;
    339                        this.posY -= this.motionY / (double)var20 * 0.05000000074505806D;
    340                        this.posZ -= this.motionZ / (double)var20 * 0.05000000074505806D;
    341                        this.worldObj.playSoundAtEntity(this, "random.bowhit", 1.0F, 1.2F / (this.rand.nextFloat() * 0.2F + 0.9F));
    342                        this.inGround = true;
    343                        this.arrowShake = 7;
    344                        this.func_70243_d(false);
    345                    }
    346                }
    347
    348                if (this.func_70241_g())
    349                {
    350                    for (int var21 = 0; var21 < 4; ++var21)
    351                    {
    352                        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);
    353                    }
    354                }
    355
    356                this.posX += this.motionX;
    357                this.posY += this.motionY;
    358                this.posZ += this.motionZ;
    359                var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
    360                this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
    361
    362                for (this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var20) * 180.0D / Math.PI); this.rotationPitch - this.prevRotationPitch < -180.0F; this.prevRotationPitch -= 360.0F)
    363                {
    364                    ;
    365                }
    366
    367                while (this.rotationPitch - this.prevRotationPitch >= 180.0F)
    368                {
    369                    this.prevRotationPitch += 360.0F;
    370                }
    371
    372                while (this.rotationYaw - this.prevRotationYaw < -180.0F)
    373                {
    374                    this.prevRotationYaw -= 360.0F;
    375                }
    376
    377                while (this.rotationYaw - this.prevRotationYaw >= 180.0F)
    378                {
    379                    this.prevRotationYaw += 360.0F;
    380                }
    381
    382                this.rotationPitch = this.prevRotationPitch + (this.rotationPitch - this.prevRotationPitch) * 0.2F;
    383                this.rotationYaw = this.prevRotationYaw + (this.rotationYaw - this.prevRotationYaw) * 0.2F;
    384                float var23 = 0.99F;
    385                var11 = 0.05F;
    386
    387                if (this.isInWater())
    388                {
    389                    for (int var26 = 0; var26 < 4; ++var26)
    390                    {
    391                        float var27 = 0.25F;
    392                        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);
    393                    }
    394
    395                    var23 = 0.8F;
    396                }
    397
    398                this.motionX *= (double)var23;
    399                this.motionY *= (double)var23;
    400                this.motionZ *= (double)var23;
    401                this.motionY -= (double)var11;
    402                this.setPosition(this.posX, this.posY, this.posZ);
    403                this.doBlockCollisions();
    404            }
    405        }
    406
    407        /**
    408         * (abstract) Protected helper method to write subclass entity data to NBT.
    409         */
    410        public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
    411        {
    412            par1NBTTagCompound.setShort("xTile", (short)this.xTile);
    413            par1NBTTagCompound.setShort("yTile", (short)this.yTile);
    414            par1NBTTagCompound.setShort("zTile", (short)this.zTile);
    415            par1NBTTagCompound.setByte("inTile", (byte)this.inTile);
    416            par1NBTTagCompound.setByte("inData", (byte)this.inData);
    417            par1NBTTagCompound.setByte("shake", (byte)this.arrowShake);
    418            par1NBTTagCompound.setByte("inGround", (byte)(this.inGround ? 1 : 0));
    419            par1NBTTagCompound.setByte("pickup", (byte)this.canBePickedUp);
    420            par1NBTTagCompound.setDouble("damage", this.damage);
    421        }
    422
    423        /**
    424         * (abstract) Protected helper method to read subclass entity data from NBT.
    425         */
    426        public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
    427        {
    428            this.xTile = par1NBTTagCompound.getShort("xTile");
    429            this.yTile = par1NBTTagCompound.getShort("yTile");
    430            this.zTile = par1NBTTagCompound.getShort("zTile");
    431            this.inTile = par1NBTTagCompound.getByte("inTile") & 255;
    432            this.inData = par1NBTTagCompound.getByte("inData") & 255;
    433            this.arrowShake = par1NBTTagCompound.getByte("shake") & 255;
    434            this.inGround = par1NBTTagCompound.getByte("inGround") == 1;
    435
    436            if (par1NBTTagCompound.hasKey("damage"))
    437            {
    438                this.damage = par1NBTTagCompound.getDouble("damage");
    439            }
    440
    441            if (par1NBTTagCompound.hasKey("pickup"))
    442            {
    443                this.canBePickedUp = par1NBTTagCompound.getByte("pickup");
    444            }
    445            else if (par1NBTTagCompound.hasKey("player"))
    446            {
    447                this.canBePickedUp = par1NBTTagCompound.getBoolean("player") ? 1 : 0;
    448            }
    449        }
    450
    451        /**
    452         * Called by a player entity when they collide with an entity
    453         */
    454        public void onCollideWithPlayer(EntityPlayer par1EntityPlayer)
    455        {
    456            if (!this.worldObj.isRemote && this.inGround && this.arrowShake <= 0)
    457            {
    458                boolean var2 = this.canBePickedUp == 1 || this.canBePickedUp == 2 && par1EntityPlayer.capabilities.isCreativeMode;
    459
    460                if (this.canBePickedUp == 1 && !par1EntityPlayer.inventory.addItemStackToInventory(new ItemStack(Item.arrow, 1)))
    461                {
    462                    var2 = false;
    463                }
    464
    465                if (var2)
    466                {
    467                    this.worldObj.playSoundAtEntity(this, "random.pop", 0.2F, ((this.rand.nextFloat() - this.rand.nextFloat()) * 0.7F + 1.0F) * 2.0F);
    468                    par1EntityPlayer.onItemPickup(this, 1);
    469                    this.setDead();
    470                }
    471            }
    472        }
    473
    474        @SideOnly(Side.CLIENT)
    475        public float getShadowSize()
    476        {
    477            return 0.0F;
    478        }
    479
    480        public void setDamage(double par1)
    481        {
    482            this.damage = par1;
    483        }
    484
    485        public double getDamage()
    486        {
    487            return this.damage;
    488        }
    489
    490        /**
    491         * Sets the amount of knockback the arrow applies when it hits a mob.
    492         */
    493        public void setKnockbackStrength(int par1)
    494        {
    495            this.knockbackStrength = par1;
    496        }
    497
    498        /**
    499         * If returns false, the item will not inflict any damage against entities.
    500         */
    501        public boolean canAttackWithItem()
    502        {
    503            return false;
    504        }
    505
    506        public void func_70243_d(boolean par1)
    507        {
    508            byte var2 = this.dataWatcher.getWatchableObjectByte(16);
    509
    510            if (par1)
    511            {
    512                this.dataWatcher.updateObject(16, Byte.valueOf((byte)(var2 | 1)));
    513            }
    514            else
    515            {
    516                this.dataWatcher.updateObject(16, Byte.valueOf((byte)(var2 & -2)));
    517            }
    518        }
    519
    520        public boolean func_70241_g()
    521        {
    522            byte var1 = this.dataWatcher.getWatchableObjectByte(16);
    523            return (var1 & 1) != 0;
    524        }
    525    }