    001    package net.minecraft.src;
    002
    003    import cpw.mods.fml.common.Side;
    004    import cpw.mods.fml.common.asm.SideOnly;
    005    import java.util.List;
    006
    007    public class EntityArrow extends Entity implements IProjectile
    008    {
    009        private int xTile = -1;
    010        private int yTile = -1;
    011        private int zTile = -1;
    012        private int inTile = 0;
    013        private int inData = 0;
    014        private boolean inGround = false;
    015
    016        /** 1 if the player can pick up the arrow */
    017        public int canBePickedUp = 0;
    018
    019        /** Seems to be some sort of timer for animating an arrow. */
    020        public int arrowShake = 0;
    021
    022        /** The owner of this arrow. */
    023        public Entity shootingEntity;
    024        private int ticksInGround;
    025        private int ticksInAir = 0;
    026        private double damage = 2.0D;
    027
    028        /** The amount of knockback an arrow applies when it hits a mob. */
    029        private int knockbackStrength;
    030
    031        public EntityArrow(World par1World)
    032        {
    033            super(par1World);
    034            this.setSize(0.5F, 0.5F);
    035        }
    036
    037        public EntityArrow(World par1World, double par2, double par4, double par6)
    038        {
    039            super(par1World);
    040            this.setSize(0.5F, 0.5F);
    041            this.setPosition(par2, par4, par6);
    042            this.yOffset = 0.0F;
    043        }
    044
    045        public EntityArrow(World par1World, EntityLiving par2EntityLiving, EntityLiving par3EntityLiving, float par4, float par5)
    046        {
    047            super(par1World);
    048            this.shootingEntity = par2EntityLiving;
    049
    050            if (par2EntityLiving instanceof EntityPlayer)
    051            {
    052                this.canBePickedUp = 1;
    053            }
    054
    055            this.posY = par2EntityLiving.posY + (double)par2EntityLiving.getEyeHeight() - 0.10000000149011612D;
    056            double var6 = par3EntityLiving.posX - par2EntityLiving.posX;
    057            double var8 = par3EntityLiving.posY + (double)par3EntityLiving.getEyeHeight() - 0.699999988079071D - this.posY;
    058            double var10 = par3EntityLiving.posZ - par2EntityLiving.posZ;
    059            double var12 = (double)MathHelper.sqrt_double(var6 * var6 + var10 * var10);
    060
    061            if (var12 >= 1.0E-7D)
    062            {
    063                float var14 = (float)(Math.atan2(var10, var6) * 180.0D / Math.PI) - 90.0F;
    064                float var15 = (float)(-(Math.atan2(var8, var12) * 180.0D / Math.PI));
    065                double var16 = var6 / var12;
    066                double var18 = var10 / var12;
    067                this.setLocationAndAngles(par2EntityLiving.posX + var16, this.posY, par2EntityLiving.posZ + var18, var14, var15);
    068                this.yOffset = 0.0F;
    069                float var20 = (float)var12 * 0.2F;
    070                this.setThrowableHeading(var6, var8 + (double)var20, var10, par4, par5);
    071            }
    072        }
    073
    074        public EntityArrow(World par1World, EntityLiving par2EntityLiving, float par3)
    075        {
    076            super(par1World);
    077            this.shootingEntity = par2EntityLiving;
    078
    079            if (par2EntityLiving instanceof EntityPlayer)
    080            {
    081                this.canBePickedUp = 1;
    082            }
    083
    084            this.setSize(0.5F, 0.5F);
    085            this.setLocationAndAngles(par2EntityLiving.posX, par2EntityLiving.posY + (double)par2EntityLiving.getEyeHeight(), par2EntityLiving.posZ, par2EntityLiving.rotationYaw, par2EntityLiving.rotationPitch);
    086            this.posX -= (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
    087            this.posY -= 0.10000000149011612D;
    088            this.posZ -= (double)(MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
    089            this.setPosition(this.posX, this.posY, this.posZ);
    090            this.yOffset = 0.0F;
    091            this.motionX = (double)(-MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI));
    092            this.motionZ = (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI));
    093            this.motionY = (double)(-MathHelper.sin(this.rotationPitch / 180.0F * (float)Math.PI));
    094            this.setThrowableHeading(this.motionX, this.motionY, this.motionZ, par3 * 1.5F, 1.0F);
    095        }
    096
    097        protected void entityInit()
    098        {
    099            this.dataWatcher.addObject(16, Byte.valueOf((byte)0));
    100        }
    101
    102        /**
    103         * Similar to setArrowHeading, it's point the throwable entity to a x, y, z direction.
    104         */
    105        public void setThrowableHeading(double par1, double par3, double par5, float par7, float par8)
    106        {
    107            float var9 = MathHelper.sqrt_double(par1 * par1 + par3 * par3 + par5 * par5);
    108            par1 /= (double)var9;
    109            par3 /= (double)var9;
    110            par5 /= (double)var9;
    111            par1 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
    112            par3 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
    113            par5 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
    114            par1 *= (double)par7;
    115            par3 *= (double)par7;
    116            par5 *= (double)par7;
    117            this.motionX = par1;
    118            this.motionY = par3;
    119            this.motionZ = par5;
    120            float var10 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
    121            this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
    122            this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var10) * 180.0D / Math.PI);
    123            this.ticksInGround = 0;
    124        }
    125
    126        @SideOnly(Side.CLIENT)
    127
    128        /**
    129         * Sets the position and rotation. Only difference from the other one is no bounding on the rotation. Args: posX,
    130         * posY, posZ, yaw, pitch
    131         */
    132        public void setPositionAndRotation2(double par1, double par3, double par5, float par7, float par8, int par9)
    133        {
    134            this.setPosition(par1, par3, par5);
    135            this.setRotation(par7, par8);
    136        }
    137
    138        @SideOnly(Side.CLIENT)
    139
    140        /**
    141         * Sets the velocity to the args. Args: x, y, z
    142         */
    143        public void setVelocity(double par1, double par3, double par5)
    144        {
    145            this.motionX = par1;
    146            this.motionY = par3;
    147            this.motionZ = par5;
    148
    149            if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
    150            {
    151                float var7 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
    152                this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
    153                this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var7) * 180.0D / Math.PI);
    154                this.prevRotationPitch = this.rotationPitch;
    155                this.prevRotationYaw = this.rotationYaw;
    156                this.setLocationAndAngles(this.posX, this.posY, this.posZ, this.rotationYaw, this.rotationPitch);
    157                this.ticksInGround = 0;
    158            }
    159        }
    160
    161        /**
    162         * Called to update the entity's position/logic.
    163         */
    164        public void onUpdate()
    165        {
    166            super.onUpdate();
    167
    168            if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
    169            {
    170                float var1 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
    171                this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
    172                this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var1) * 180.0D / Math.PI);
    173            }
    174
    175            int var16 = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
    176
    177            if (var16 > 0)
    178            {
    179                Block.blocksList[var16].setBlockBoundsBasedOnState(this.worldObj, this.xTile, this.yTile, this.zTile);
    180                AxisAlignedBB var2 = Block.blocksList[var16].getCollisionBoundingBoxFromPool(this.worldObj, this.xTile, this.yTile, this.zTile);
    181
    182                if (var2 != null && var2.isVecInside(this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ)))
    183                {
    184                    this.inGround = true;
    185                }
    186            }
    187
    188            if (this.arrowShake > 0)
    189            {
    190                --this.arrowShake;
    191            }
    192
    193            if (this.inGround)
    194            {
    195                int var18 = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
    196                int var19 = this.worldObj.getBlockMetadata(this.xTile, this.yTile, this.zTile);
    197
    198                if (var18 == this.inTile && var19 == this.inData)
    199                {
    200                    ++this.ticksInGround;
    201
    202                    if (this.ticksInGround == 1200)
    203                    {
    204                        this.setDead();
    205                    }
    206                }
    207                else
    208                {
    209                    this.inGround = false;
    210                    this.motionX *= (double)(this.rand.nextFloat() * 0.2F);
    211                    this.motionY *= (double)(this.rand.nextFloat() * 0.2F);
    212                    this.motionZ *= (double)(this.rand.nextFloat() * 0.2F);
    213                    this.ticksInGround = 0;
    214                    this.ticksInAir = 0;
    215                }
    216            }
    217            else
    218            {
    219                ++this.ticksInAir;
    220                Vec3 var17 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
    221                Vec3 var3 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
    222                MovingObjectPosition var4 = this.worldObj.rayTraceBlocks_do_do(var17, var3, false, true);
    223                var17 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
    224                var3 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
    225
    226                if (var4 != null)
    227                {
    228                    var3 = this.worldObj.getWorldVec3Pool().getVecFromPool(var4.hitVec.xCoord, var4.hitVec.yCoord, var4.hitVec.zCoord);
    229                }
    230
    231                Entity var5 = null;
    232                List var6 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, this.boundingBox.addCoord(this.motionX, this.motionY, this.motionZ).expand(1.0D, 1.0D, 1.0D));
    233                double var7 = 0.0D;
    234                int var9;
    235                float var11;
    236
    237                for (var9 = 0; var9 < var6.size(); ++var9)
    238                {
    239                    Entity var10 = (Entity)var6.get(var9);
    240
    241                    if (var10.canBeCollidedWith() && (var10 != this.shootingEntity || this.ticksInAir >= 5))
    242                    {
    243                        var11 = 0.3F;
    244                        AxisAlignedBB var12 = var10.boundingBox.expand((double)var11, (double)var11, (double)var11);
    245                        MovingObjectPosition var13 = var12.calculateIntercept(var17, var3);
    246
    247                        if (var13 != null)
    248                        {
    249                            double var14 = var17.distanceTo(var13.hitVec);
    250
    251                            if (var14 < var7 || var7 == 0.0D)
    252                            {
    253                                var5 = var10;
    254                                var7 = var14;
    255                            }
    256                        }
    257                    }
    258                }
    259
    260                if (var5 != null)
    261                {
    262                    var4 = new MovingObjectPosition(var5);
    263                }
    264
    265                float var20;
    266
    267                if (var4 != null)
    268                {
    269                    if (var4.entityHit != null)
    270                    {
    271                        var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
    272                        int var23 = MathHelper.ceiling_double_int((double)var20 * this.damage);
    273
    274                        if (this.getIsCritical())
    275                        {
    276                            var23 += this.rand.nextInt(var23 / 2 + 2);
    277                        }
    278
    279                        DamageSource var21 = null;
    280
    281                        if (this.shootingEntity == null)
    282                        {
    283                            var21 = DamageSource.causeArrowDamage(this, this);
    284                        }
    285                        else
    286                        {
    287                            var21 = DamageSource.causeArrowDamage(this, this.shootingEntity);
    288                        }
    289
    290                        if (this.isBurning())
    291                        {
    292                            var4.entityHit.setFire(5);
    293                        }
    294
    295                        if (var4.entityHit.attackEntityFrom(var21, var23))
    296                        {
    297                            if (var4.entityHit instanceof EntityLiving)
    298                            {
    299                                if (!this.worldObj.isRemote)
    300                                {
    301                                    EntityLiving var24 = (EntityLiving)var4.entityHit;
    302                                    var24.func_85034_r(var24.func_85035_bI() + 1);
    303                                }
    304
    305                                if (this.knockbackStrength > 0)
    306                                {
    307                                    float var25 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
    308
    309                                    if (var25 > 0.0F)
    310                                    {
    311                                        var4.entityHit.addVelocity(this.motionX * (double)this.knockbackStrength * 0.6000000238418579D / (double)var25, 0.1D, this.motionZ * (double)this.knockbackStrength * 0.6000000238418579D / (double)var25);
    312                                    }
    313                                }
    314                            }
    315
    316                            this.func_85030_a("random.bowhit", 1.0F, 1.2F / (this.rand.nextFloat() * 0.2F + 0.9F));
    317                            this.setDead();
    318                        }
    319                        else
    320                        {
    321                            this.motionX *= -0.10000000149011612D;
    322                            this.motionY *= -0.10000000149011612D;
    323                            this.motionZ *= -0.10000000149011612D;
    324                            this.rotationYaw += 180.0F;
    325                            this.prevRotationYaw += 180.0F;
    326                            this.ticksInAir = 0;
    327                        }
    328                    }
    329                    else
    330                    {
    331                        this.xTile = var4.blockX;
    332                        this.yTile = var4.blockY;
    333                        this.zTile = var4.blockZ;
    334                        this.inTile = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
    335                        this.inData = this.worldObj.getBlockMetadata(this.xTile, this.yTile, this.zTile);
    336                        this.motionX = (double)((float)(var4.hitVec.xCoord - this.posX));
    337                        this.motionY = (double)((float)(var4.hitVec.yCoord - this.posY));
    338                        this.motionZ = (double)((float)(var4.hitVec.zCoord - this.posZ));
    339                        var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
    340                        this.posX -= this.motionX / (double)var20 * 0.05000000074505806D;
    341                        this.posY -= this.motionY / (double)var20 * 0.05000000074505806D;
    342                        this.posZ -= this.motionZ / (double)var20 * 0.05000000074505806D;
    343                        this.func_85030_a("random.bowhit", 1.0F, 1.2F / (this.rand.nextFloat() * 0.2F + 0.9F));
    344                        this.inGround = true;
    345                        this.arrowShake = 7;
    346                        this.setIsCritical(false);
    347
    348                        if (this.inTile != 0)
    349                        {
    350                            Block.blocksList[this.inTile].onEntityCollidedWithBlock(this.worldObj, this.xTile, this.yTile, this.zTile, this);
    351                        }
    352                    }
    353                }
    354
    355                if (this.getIsCritical())
    356                {
    357                    for (var9 = 0; var9 < 4; ++var9)
    358                    {
    359                        this.worldObj.spawnParticle("crit", this.posX + this.motionX * (double)var9 / 4.0D, this.posY + this.motionY * (double)var9 / 4.0D, this.posZ + this.motionZ * (double)var9 / 4.0D, -this.motionX, -this.motionY + 0.2D, -this.motionZ);
    360                    }
    361                }
    362
    363                this.posX += this.motionX;
    364                this.posY += this.motionY;
    365                this.posZ += this.motionZ;
    366                var20 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
    367                this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
    368
    369                for (this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var20) * 180.0D / Math.PI); this.rotationPitch - this.prevRotationPitch < -180.0F; this.prevRotationPitch -= 360.0F)
    370                {
    371                    ;
    372                }
    373
    374                while (this.rotationPitch - this.prevRotationPitch >= 180.0F)
    375                {
    376                    this.prevRotationPitch += 360.0F;
    377                }
    378
    379                while (this.rotationYaw - this.prevRotationYaw < -180.0F)
    380                {
    381                    this.prevRotationYaw -= 360.0F;
    382                }
    383
    384                while (this.rotationYaw - this.prevRotationYaw >= 180.0F)
    385                {
    386                    this.prevRotationYaw += 360.0F;
    387                }
    388
    389                this.rotationPitch = this.prevRotationPitch + (this.rotationPitch - this.prevRotationPitch) * 0.2F;
    390                this.rotationYaw = this.prevRotationYaw + (this.rotationYaw - this.prevRotationYaw) * 0.2F;
    391                float var22 = 0.99F;
    392                var11 = 0.05F;
    393
    394                if (this.isInWater())
    395                {
    396                    for (int var26 = 0; var26 < 4; ++var26)
    397                    {
    398                        float var27 = 0.25F;
    399                        this.worldObj.spawnParticle("bubble", this.posX - this.motionX * (double)var27, this.posY - this.motionY * (double)var27, this.posZ - this.motionZ * (double)var27, this.motionX, this.motionY, this.motionZ);
    400                    }
    401
    402                    var22 = 0.8F;
    403                }
    404
    405                this.motionX *= (double)var22;
    406                this.motionY *= (double)var22;
    407                this.motionZ *= (double)var22;
    408                this.motionY -= (double)var11;
    409                this.setPosition(this.posX, this.posY, this.posZ);
    410                this.doBlockCollisions();
    411            }
    412        }
    413
    414        /**
    415         * (abstract) Protected helper method to write subclass entity data to NBT.
    416         */
    417        public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
    418        {
    419            par1NBTTagCompound.setShort("xTile", (short)this.xTile);
    420            par1NBTTagCompound.setShort("yTile", (short)this.yTile);
    421            par1NBTTagCompound.setShort("zTile", (short)this.zTile);
    422            par1NBTTagCompound.setByte("inTile", (byte)this.inTile);
    423            par1NBTTagCompound.setByte("inData", (byte)this.inData);
    424            par1NBTTagCompound.setByte("shake", (byte)this.arrowShake);
    425            par1NBTTagCompound.setByte("inGround", (byte)(this.inGround ? 1 : 0));
    426            par1NBTTagCompound.setByte("pickup", (byte)this.canBePickedUp);
    427            par1NBTTagCompound.setDouble("damage", this.damage);
    428        }
    429
    430        /**
    431         * (abstract) Protected helper method to read subclass entity data from NBT.
    432         */
    433        public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
    434        {
    435            this.xTile = par1NBTTagCompound.getShort("xTile");
    436            this.yTile = par1NBTTagCompound.getShort("yTile");
    437            this.zTile = par1NBTTagCompound.getShort("zTile");
    438            this.inTile = par1NBTTagCompound.getByte("inTile") & 255;
    439            this.inData = par1NBTTagCompound.getByte("inData") & 255;
    440            this.arrowShake = par1NBTTagCompound.getByte("shake") & 255;
    441            this.inGround = par1NBTTagCompound.getByte("inGround") == 1;
    442
    443            if (par1NBTTagCompound.hasKey("damage"))
    444            {
    445                this.damage = par1NBTTagCompound.getDouble("damage");
    446            }
    447
    448            if (par1NBTTagCompound.hasKey("pickup"))
    449            {
    450                this.canBePickedUp = par1NBTTagCompound.getByte("pickup");
    451            }
    452            else if (par1NBTTagCompound.hasKey("player"))
    453            {
    454                this.canBePickedUp = par1NBTTagCompound.getBoolean("player") ? 1 : 0;
    455            }
    456        }
    457
    458        /**
    459         * Called by a player entity when they collide with an entity
    460         */
    461        public void onCollideWithPlayer(EntityPlayer par1EntityPlayer)
    462        {
    463            if (!this.worldObj.isRemote && this.inGround && this.arrowShake <= 0)
    464            {
    465                boolean var2 = this.canBePickedUp == 1 || this.canBePickedUp == 2 && par1EntityPlayer.capabilities.isCreativeMode;
    466
    467                if (this.canBePickedUp == 1 && !par1EntityPlayer.inventory.addItemStackToInventory(new ItemStack(Item.arrow, 1)))
    468                {
    469                    var2 = false;
    470                }
    471
    472                if (var2)
    473                {
    474                    this.func_85030_a("random.pop", 0.2F, ((this.rand.nextFloat() - this.rand.nextFloat()) * 0.7F + 1.0F) * 2.0F);
    475                    par1EntityPlayer.onItemPickup(this, 1);
    476                    this.setDead();
    477                }
    478            }
    479        }
    480
    481        /**
    482         * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
    483         * prevent them from trampling crops
    484         */
    485        protected boolean canTriggerWalking()
    486        {
    487            return false;
    488        }
    489
    490        @SideOnly(Side.CLIENT)
    491        public float getShadowSize()
    492        {
    493            return 0.0F;
    494        }
    495
    496        public void setDamage(double par1)
    497        {
    498            this.damage = par1;
    499        }
    500
    501        public double getDamage()
    502        {
    503            return this.damage;
    504        }
    505
    506        /**
    507         * Sets the amount of knockback the arrow applies when it hits a mob.
    508         */
    509        public void setKnockbackStrength(int par1)
    510        {
    511            this.knockbackStrength = par1;
    512        }
    513
    514        /**
    515         * If returns false, the item will not inflict any damage against entities.
    516         */
    517        public boolean canAttackWithItem()
    518        {
    519            return false;
    520        }
    521
    522        /**
    523         * Whether the arrow has a stream of critical hit particles flying behind it.
    524         */
    525        public void setIsCritical(boolean par1)
    526        {
    527            byte var2 = this.dataWatcher.getWatchableObjectByte(16);
    528
    529            if (par1)
    530            {
    531                this.dataWatcher.updateObject(16, Byte.valueOf((byte)(var2 | 1)));
    532            }
    533            else
    534            {
    535                this.dataWatcher.updateObject(16, Byte.valueOf((byte)(var2 & -2)));
    536            }
    537        }
    538
    539        /**
    540         * Whether the arrow has a stream of critical hit particles flying behind it.
    541         */
    542        public boolean getIsCritical()
    543        {
    544            byte var1 = this.dataWatcher.getWatchableObjectByte(16);
    545            return (var1 & 1) != 0;
    546        }
    547    }