    001    package net.minecraft.entity.item;
    002
    003    import cpw.mods.fml.common.Side;
    004    import cpw.mods.fml.common.asm.SideOnly;
    005
    006    import java.util.ArrayList;
    007    import java.util.List;
    008    import net.minecraft.block.Block;
    009    import net.minecraft.block.BlockRail;
    010    import net.minecraft.entity.Entity;
    011    import net.minecraft.entity.EntityLiving;
    012    import net.minecraft.entity.monster.EntityIronGolem;
    013    import net.minecraft.entity.player.EntityPlayer;
    014    import net.minecraft.inventory.IInventory;
    015    import net.minecraft.item.Item;
    016    import net.minecraft.item.ItemStack;
    017    import net.minecraft.nbt.NBTTagCompound;
    018    import net.minecraft.nbt.NBTTagList;
    019    import net.minecraft.server.gui.IUpdatePlayerListBox;
    020    import net.minecraft.util.AxisAlignedBB;
    021    import net.minecraft.util.DamageSource;
    022    import net.minecraft.util.MathHelper;
    023    import net.minecraft.util.Vec3;
    024    import net.minecraft.world.World;
    025
    026    import net.minecraftforge.common.IMinecartCollisionHandler;
    027    import net.minecraftforge.common.MinecartRegistry;
    028    import net.minecraftforge.common.MinecraftForge;
    029    import net.minecraftforge.event.entity.minecart.*;
    030
    031    public class EntityMinecart extends Entity implements IInventory
    032    {
    033        /** Array of item stacks stored in minecart (for storage minecarts). */
    034        protected ItemStack[] cargoItems;
    035        protected int fuel;
    036        protected boolean field_70499_f;
    037
    038        /** The type of minecart, 2 for powered, 1 for storage. */
    039        public int minecartType;
    040        public double pushX;
    041        public double pushZ;
    042        protected final IUpdatePlayerListBox field_82344_g;
    043        protected boolean field_82345_h;
    044        protected static final int[][][] field_70500_g = new int[][][] {{{0, 0, -1}, {0, 0, 1}}, {{ -1, 0, 0}, {1, 0, 0}}, {{ -1, -1, 0}, {1, 0, 0}}, {{ -1, 0, 0}, {1, -1, 0}}, {{0, 0, -1}, {0, -1, 1}}, {{0, -1, -1}, {0, 0, 1}}, {{0, 0, 1}, {1, 0, 0}}, {{0, 0, 1}, { -1, 0, 0}}, {{0, 0, -1}, { -1, 0, 0}}, {{0, 0, -1}, {1, 0, 0}}};
    045
    046        /** appears to be the progress of the turn */
    047        protected int turnProgress;
    048        protected double minecartX;
    049        protected double minecartY;
    050        protected double minecartZ;
    051        protected double minecartYaw;
    052        protected double minecartPitch;
    053        @SideOnly(Side.CLIENT)
    054        protected double velocityX;
    055        @SideOnly(Side.CLIENT)
    056        protected double velocityY;
    057        @SideOnly(Side.CLIENT)
    058        protected double velocityZ;
    059
    060        /* Forge: Minecart Compatibility Layer Integration. */
    061        public static float defaultMaxSpeedRail = 0.4f;
    062        public static float defaultMaxSpeedGround = 0.4f;
    063        public static float defaultMaxSpeedAirLateral = 0.4f;
    064        public static float defaultMaxSpeedAirVertical = -1f;
    065        public static double defaultDragRidden = 0.996999979019165D;
    066        public static double defaultDragEmpty = 0.9599999785423279D;
    067        public static double defaultDragAir = 0.94999998807907104D;
    068        protected boolean canUseRail = true;
    069        protected boolean canBePushed = true;
    070        private static IMinecartCollisionHandler collisionHandler = null;
    071
    072        /* Instance versions of the above physics properties */
    073        protected float maxSpeedRail;
    074        protected float maxSpeedGround;
    075        protected float maxSpeedAirLateral;
    076        protected float maxSpeedAirVertical;
    077        protected double dragAir;
    078
    079        public EntityMinecart(World par1World)
    080        {
    081            super(par1World);
    082            this.cargoItems = new ItemStack[36];
    083            this.fuel = 0;
    084            this.field_70499_f = false;
    085            this.field_82345_h = true;
    086            this.preventEntitySpawning = true;
    087            this.setSize(0.98F, 0.7F);
    088            this.yOffset = this.height / 2.0F;
    089            this.field_82344_g = par1World != null ? par1World.func_82735_a(this) : null;
    090
    091            maxSpeedRail = defaultMaxSpeedRail;
    092            maxSpeedGround = defaultMaxSpeedGround;
    093            maxSpeedAirLateral = defaultMaxSpeedAirLateral;
    094            maxSpeedAirVertical = defaultMaxSpeedAirVertical;
    095            dragAir = defaultDragAir;
    096        }
    097
    098        public EntityMinecart(World world, int type)
    099        {
    100            this(world);
    101            minecartType = type;
    102        }
    103
    104        /**
    105         * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
    106         * prevent them from trampling crops
    107         */
    108        protected boolean canTriggerWalking()
    109        {
    110            return false;
    111        }
    112
    113        protected void entityInit()
    114        {
    115            this.dataWatcher.addObject(16, new Byte((byte)0));
    116            this.dataWatcher.addObject(17, new Integer(0));
    117            this.dataWatcher.addObject(18, new Integer(1));
    118            this.dataWatcher.addObject(19, new Integer(0));
    119        }
    120
    121        /**
    122         * Returns a boundingBox used to collide the entity with other entities and blocks. This enables the entity to be
    123         * pushable on contact, like boats or minecarts.
    124         */
    125        public AxisAlignedBB getCollisionBox(Entity par1Entity)
    126        {
    127            if (getCollisionHandler() != null)
    128            {
    129                return getCollisionHandler().getCollisionBox(this, par1Entity);
    130            }
    131            return par1Entity.canBePushed() ? par1Entity.boundingBox : null;
    132        }
    133
    134        /**
    135         * returns the bounding box for this entity
    136         */
    137        public AxisAlignedBB getBoundingBox()
    138        {
    139            if (getCollisionHandler() != null)
    140            {
    141                return getCollisionHandler().getBoundingBox(this);
    142            }
    143            return null;
    144        }
    145
    146        /**
    147         * Returns true if this entity should push and be pushed by other entities when colliding.
    148         */
    149        public boolean canBePushed()
    150        {
    151            return canBePushed;
    152        }
    153
    154        public EntityMinecart(World par1World, double par2, double par4, double par6, int par8)
    155        {
    156            this(par1World);
    157            this.setPosition(par2, par4 + (double)this.yOffset, par6);
    158            this.motionX = 0.0D;
    159            this.motionY = 0.0D;
    160            this.motionZ = 0.0D;
    161            this.prevPosX = par2;
    162            this.prevPosY = par4;
    163            this.prevPosZ = par6;
    164            this.minecartType = par8;
    165        }
    166
    167        /**
    168         * Returns the Y offset from the entity's position for any entity riding this one.
    169         */
    170        public double getMountedYOffset()
    171        {
    172            return (double)this.height * 0.0D - 0.30000001192092896D;
    173        }
    174
    175        /**
    176         * Called when the entity is attacked.
    177         */
    178        public boolean attackEntityFrom(DamageSource par1DamageSource, int par2)
    179        {
    180            if (!this.worldObj.isRemote && !this.isDead)
    181            {
    182                if (this.func_85032_ar())
    183                {
    184                    return false;
    185                }
    186                else
    187                {
    188                    this.func_70494_i(-this.func_70493_k());
    189                    this.func_70497_h(10);
    190                    this.setBeenAttacked();
    191                    this.setDamage(this.getDamage() + par2 * 10);
    192
    193                    if (par1DamageSource.getEntity() instanceof EntityPlayer && ((EntityPlayer)par1DamageSource.getEntity()).capabilities.isCreativeMode)
    194                    {
    195                        this.setDamage(100);
    196                    }
    197
    198                    if (this.getDamage() > 40)
    199                    {
    200                        if (this.riddenByEntity != null)
    201                        {
    202                            this.riddenByEntity.mountEntity(this);
    203                        }
    204
    205                        this.setDead();
    206                        dropCartAsItem();
    207                    }
    208
    209                    return true;
    210                }
    211            }
    212            else
    213            {
    214                return true;
    215            }
    216        }
    217
    218        @SideOnly(Side.CLIENT)
    219
    220        /**
    221         * Setups the entity to do the hurt animation. Only used by packets in multiplayer.
    222         */
    223        public void performHurtAnimation()
    224        {
    225            this.func_70494_i(-this.func_70493_k());
    226            this.func_70497_h(10);
    227            this.setDamage(this.getDamage() + this.getDamage() * 10);
    228        }
    229
    230        /**
    231         * Returns true if other Entities should be prevented from moving through this Entity.
    232         */
    233        public boolean canBeCollidedWith()
    234        {
    235            return !this.isDead;
    236        }
    237
    238        /**
    239         * Will get destroyed next tick.
    240         */
    241        public void setDead()
    242        {
    243            if (this.field_82345_h)
    244            {
    245                for (int var1 = 0; var1 < this.getSizeInventory(); ++var1)
    246                {
    247                    ItemStack var2 = this.getStackInSlot(var1);
    248
    249                    if (var2 != null)
    250                    {
    251                        float var3 = this.rand.nextFloat() * 0.8F + 0.1F;
    252                        float var4 = this.rand.nextFloat() * 0.8F + 0.1F;
    253                        float var5 = this.rand.nextFloat() * 0.8F + 0.1F;
    254
    255                        while (var2.stackSize > 0)
    256                        {
    257                            int var6 = this.rand.nextInt(21) + 10;
    258
    259                            if (var6 > var2.stackSize)
    260                            {
    261                                var6 = var2.stackSize;
    262                            }
    263
    264                            var2.stackSize -= var6;
    265                            EntityItem var7 = new EntityItem(this.worldObj, this.posX + (double)var3, this.posY + (double)var4, this.posZ + (double)var5, new ItemStack(var2.itemID, var6, var2.getItemDamage()));
    266
    267                            if (var2.hasTagCompound())
    268                            {
    269                                var7.item.setTagCompound((NBTTagCompound)var2.getTagCompound().copy());
    270                            }
    271
    272                            float var8 = 0.05F;
    273                            var7.motionX = (double)((float)this.rand.nextGaussian() * var8);
    274                            var7.motionY = (double)((float)this.rand.nextGaussian() * var8 + 0.2F);
    275                            var7.motionZ = (double)((float)this.rand.nextGaussian() * var8);
    276                            this.worldObj.spawnEntityInWorld(var7);
    277                        }
    278                    }
    279                }
    280            }
    281
    282            super.setDead();
    283
    284            if (this.field_82344_g != null)
    285            {
    286                this.field_82344_g.update();
    287            }
    288        }
    289
    290        /**
    291         * Teleports the entity to another dimension. Params: Dimension number to teleport to
    292         */
    293        public void travelToDimension(int par1)
    294        {
    295            this.field_82345_h = false;
    296            super.travelToDimension(par1);
    297        }
    298
    299        /**
    300         * Called to update the entity's position/logic.
    301         */
    302        public void onUpdate()
    303        {
    304            if (this.field_82344_g != null)
    305            {
    306                this.field_82344_g.update();
    307            }
    308
    309            if (this.func_70496_j() > 0)
    310            {
    311                this.func_70497_h(this.func_70496_j() - 1);
    312            }
    313
    314            if (this.getDamage() > 0)
    315            {
    316                this.setDamage(this.getDamage() - 1);
    317            }
    318
    319            if (this.posY < -64.0D)
    320            {
    321                this.kill();
    322            }
    323
    324            if (this.isMinecartPowered() && this.rand.nextInt(4) == 0 && minecartType == 2 && getClass() == EntityMinecart.class)
    325            {
    326                this.worldObj.spawnParticle("largesmoke", this.posX, this.posY + 0.8D, this.posZ, 0.0D, 0.0D, 0.0D);
    327            }
    328
    329            if (this.worldObj.isRemote)
    330            {
    331                if (this.turnProgress > 0)
    332                {
    333                    double var45 = this.posX + (this.minecartX - this.posX) / (double)this.turnProgress;
    334                    double var46 = this.posY + (this.minecartY - this.posY) / (double)this.turnProgress;
    335                    double var5 = this.posZ + (this.minecartZ - this.posZ) / (double)this.turnProgress;
    336                    double var7 = MathHelper.wrapAngleTo180_double(this.minecartYaw - (double)this.rotationYaw);
    337                    this.rotationYaw = (float)((double)this.rotationYaw + var7 / (double)this.turnProgress);
    338                    this.rotationPitch = (float)((double)this.rotationPitch + (this.minecartPitch - (double)this.rotationPitch) / (double)this.turnProgress);
    339                    --this.turnProgress;
    340                    this.setPosition(var45, var46, var5);
    341                    this.setRotation(this.rotationYaw, this.rotationPitch);
    342                }
    343                else
    344                {
    345                    this.setPosition(this.posX, this.posY, this.posZ);
    346                    this.setRotation(this.rotationYaw, this.rotationPitch);
    347                }
    348            }
    349            else
    350            {
    351                this.prevPosX = this.posX;
    352                this.prevPosY = this.posY;
    353                this.prevPosZ = this.posZ;
    354                this.motionY -= 0.03999999910593033D;
    355                int var1 = MathHelper.floor_double(this.posX);
    356                int var2 = MathHelper.floor_double(this.posY);
    357                int var3 = MathHelper.floor_double(this.posZ);
    358
    359                if (BlockRail.isRailBlockAt(this.worldObj, var1, var2 - 1, var3))
    360                {
    361                    --var2;
    362                }
    363
    364                double var4 = 0.4D;
    365                double var6 = 0.0078125D;
    366                int var8 = this.worldObj.getBlockId(var1, var2, var3);
    367
    368                if (canUseRail() && BlockRail.isRailBlock(var8))
    369                {
    370                    this.fallDistance = 0.0F;
    371                    Vec3 var9 = this.func_70489_a(this.posX, this.posY, this.posZ);
    372                    int var10 = ((BlockRail)Block.blocksList[var8]).getBasicRailMetadata(worldObj, this, var1, var2, var3);
    373                    this.posY = (double)var2;
    374                    boolean var11 = false;
    375                    boolean var12 = false;
    376
    377                    if (var8 == Block.railPowered.blockID)
    378                    {
    379                        var11 = (worldObj.getBlockMetadata(var1, var2, var3) & 8) != 0;
    380                        var12 = !var11;
    381                    }
    382
    383                    if (((BlockRail)Block.blocksList[var8]).isPowered())
    384                    {
    385                        var10 &= 7;
    386                    }
    387
    388                    if (var10 >= 2 && var10 <= 5)
    389                    {
    390                        this.posY = (double)(var2 + 1);
    391                    }
    392
    393                    adjustSlopeVelocities(var10);
    394
    395                    int[][] var13 = field_70500_g[var10];
    396                    double var14 = (double)(var13[1][0] - var13[0][0]);
    397                    double var16 = (double)(var13[1][2] - var13[0][2]);
    398                    double var18 = Math.sqrt(var14 * var14 + var16 * var16);
    399                    double var20 = this.motionX * var14 + this.motionZ * var16;
    400
    401                    if (var20 < 0.0D)
    402                    {
    403                        var14 = -var14;
    404                        var16 = -var16;
    405                    }
    406
    407                    double var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
    408                    this.motionX = var22 * var14 / var18;
    409                    this.motionZ = var22 * var16 / var18;
    410                    double var24;
    411                    double var26;
    412
    413                    if (this.riddenByEntity != null)
    414                    {
    415                        var24 = this.riddenByEntity.motionX * this.riddenByEntity.motionX + this.riddenByEntity.motionZ * this.riddenByEntity.motionZ;
    416                        var26 = this.motionX * this.motionX + this.motionZ * this.motionZ;
    417
    418                        if (var24 > 1.0E-4D && var26 < 0.01D)
    419                        {
    420                            this.motionX += this.riddenByEntity.motionX * 0.1D;
    421                            this.motionZ += this.riddenByEntity.motionZ * 0.1D;
    422                            var12 = false;
    423                        }
    424                    }
    425
    426                    if (var12 && shouldDoRailFunctions())
    427                    {
    428                        var24 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
    429
    430                        if (var24 < 0.03D)
    431                        {
    432                            this.motionX *= 0.0D;
    433                            this.motionY *= 0.0D;
    434                            this.motionZ *= 0.0D;
    435                        }
    436                        else
    437                        {
    438                            this.motionX *= 0.5D;
    439                            this.motionY *= 0.0D;
    440                            this.motionZ *= 0.5D;
    441                        }
    442                    }
    443
    444                    var24 = 0.0D;
    445                    var26 = (double)var1 + 0.5D + (double)var13[0][0] * 0.5D;
    446                    double var28 = (double)var3 + 0.5D + (double)var13[0][2] * 0.5D;
    447                    double var30 = (double)var1 + 0.5D + (double)var13[1][0] * 0.5D;
    448                    double var32 = (double)var3 + 0.5D + (double)var13[1][2] * 0.5D;
    449                    var14 = var30 - var26;
    450                    var16 = var32 - var28;
    451                    double var34;
    452                    double var36;
    453
    454                    if (var14 == 0.0D)
    455                    {
    456                        this.posX = (double)var1 + 0.5D;
    457                        var24 = this.posZ - (double)var3;
    458                    }
    459                    else if (var16 == 0.0D)
    460                    {
    461                        this.posZ = (double)var3 + 0.5D;
    462                        var24 = this.posX - (double)var1;
    463                    }
    464                    else
    465                    {
    466                        var34 = this.posX - var26;
    467                        var36 = this.posZ - var28;
    468                        var24 = (var34 * var14 + var36 * var16) * 2.0D;
    469                    }
    470
    471                    this.posX = var26 + var14 * var24;
    472                    this.posZ = var28 + var16 * var24;
    473                    this.setPosition(this.posX, this.posY + (double)this.yOffset, this.posZ);
    474
    475                    moveMinecartOnRail(var1, var2, var3);
    476
    477                    if (var13[0][1] != 0 && MathHelper.floor_double(this.posX) - var1 == var13[0][0] && MathHelper.floor_double(this.posZ) - var3 == var13[0][2])
    478                    {
    479                        this.setPosition(this.posX, this.posY + (double)var13[0][1], this.posZ);
    480                    }
    481                    else if (var13[1][1] != 0 && MathHelper.floor_double(this.posX) - var1 == var13[1][0] && MathHelper.floor_double(this.posZ) - var3 == var13[1][2])
    482                    {
    483                        this.setPosition(this.posX, this.posY + (double)var13[1][1], this.posZ);
    484                    }
    485
    486                    applyDragAndPushForces();
    487
    488                    Vec3 var52 = this.func_70489_a(this.posX, this.posY, this.posZ);
    489
    490                    if (var52 != null && var9 != null)
    491                    {
    492                        double var39 = (var9.yCoord - var52.yCoord) * 0.05D;
    493                        var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
    494
    495                        if (var22 > 0.0D)
    496                        {
    497                            this.motionX = this.motionX / var22 * (var22 + var39);
    498                            this.motionZ = this.motionZ / var22 * (var22 + var39);
    499                        }
    500
    501                        this.setPosition(this.posX, var52.yCoord, this.posZ);
    502                    }
    503
    504                    int var51 = MathHelper.floor_double(this.posX);
    505                    int var53 = MathHelper.floor_double(this.posZ);
    506
    507                    if (var51 != var1 || var53 != var3)
    508                    {
    509                        var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
    510                        this.motionX = var22 * (double)(var51 - var1);
    511                        this.motionZ = var22 * (double)(var53 - var3);
    512                    }
    513
    514                    double var41;
    515
    516                    updatePushForces();
    517
    518                    if(shouldDoRailFunctions())
    519                    {
    520                        ((BlockRail)Block.blocksList[var8]).onMinecartPass(worldObj, this, var1, var2, var3);
    521                    }
    522
    523                    if (var11 && shouldDoRailFunctions())
    524                    {
    525                        var41 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
    526
    527                        if (var41 > 0.01D)
    528                        {
    529                            double var43 = 0.06D;
    530                            this.motionX += this.motionX / var41 * var43;
    531                            this.motionZ += this.motionZ / var41 * var43;
    532                        }
    533                        else if (var10 == 1)
    534                        {
    535                            if (this.worldObj.isBlockNormalCube(var1 - 1, var2, var3))
    536                            {
    537                                this.motionX = 0.02D;
    538                            }
    539                            else if (this.worldObj.isBlockNormalCube(var1 + 1, var2, var3))
    540                            {
    541                                this.motionX = -0.02D;
    542                            }
    543                        }
    544                        else if (var10 == 0)
    545                        {
    546                            if (this.worldObj.isBlockNormalCube(var1, var2, var3 - 1))
    547                            {
    548                                this.motionZ = 0.02D;
    549                            }
    550                            else if (this.worldObj.isBlockNormalCube(var1, var2, var3 + 1))
    551                            {
    552                                this.motionZ = -0.02D;
    553                            }
    554                        }
    555                    }
    556                }
    557                else
    558                {
    559                    moveMinecartOffRail(var1, var2, var3);
    560                }
    561
    562                this.doBlockCollisions();
    563                this.rotationPitch = 0.0F;
    564                double var47 = this.prevPosX - this.posX;
    565                double var48 = this.prevPosZ - this.posZ;
    566
    567                if (var47 * var47 + var48 * var48 > 0.001D)
    568                {
    569                    this.rotationYaw = (float)(Math.atan2(var48, var47) * 180.0D / Math.PI);
    570
    571                    if (this.field_70499_f)
    572                    {
    573                        this.rotationYaw += 180.0F;
    574                    }
    575                }
    576
    577                double var49 = (double)MathHelper.wrapAngleTo180_float(this.rotationYaw - this.prevRotationYaw);
    578
    579                if (var49 < -170.0D || var49 >= 170.0D)
    580                {
    581                    this.rotationYaw += 180.0F;
    582                    this.field_70499_f = !this.field_70499_f;
    583                }
    584
    585                this.setRotation(this.rotationYaw, this.rotationPitch);
    586
    587                AxisAlignedBB box = null;
    588                if (getCollisionHandler() != null)
    589                {
    590                    box = getCollisionHandler().getMinecartCollisionBox(this);
    591                }
    592                else
    593                {
    594                    box = boundingBox.expand(0.2D, 0.0D, 0.2D);
    595                }
    596
    597                List var15 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, box);
    598
    599                if (var15 != null && !var15.isEmpty())
    600                {
    601                    for (int var50 = 0; var50 < var15.size(); ++var50)
    602                    {
    603                        Entity var17 = (Entity)var15.get(var50);
    604
    605                        if (var17 != this.riddenByEntity && var17.canBePushed() && var17 instanceof EntityMinecart)
    606                        {
    607                            var17.applyEntityCollision(this);
    608                        }
    609                    }
    610                }
    611
    612                if (this.riddenByEntity != null && this.riddenByEntity.isDead)
    613                {
    614                    if (this.riddenByEntity.ridingEntity == this)
    615                    {
    616                        this.riddenByEntity.ridingEntity = null;
    617                    }
    618
    619                    this.riddenByEntity = null;
    620                }
    621
    622                updateFuel();
    623                MinecraftForge.EVENT_BUS.post(new MinecartUpdateEvent(this, var1, var2, var3));
    624            }
    625        }
    626
    627        @SideOnly(Side.CLIENT)
    628        public Vec3 func_70495_a(double par1, double par3, double par5, double par7)
    629        {
    630            int var9 = MathHelper.floor_double(par1);
    631            int var10 = MathHelper.floor_double(par3);
    632            int var11 = MathHelper.floor_double(par5);
    633
    634            if (BlockRail.isRailBlockAt(this.worldObj, var9, var10 - 1, var11))
    635            {
    636                --var10;
    637            }
    638
    639            int var12 = this.worldObj.getBlockId(var9, var10, var11);
    640
    641            if (!BlockRail.isRailBlock(var12))
    642            {
    643                return null;
    644            }
    645            else
    646            {
    647                int var13 = ((BlockRail)Block.blocksList[var12]).getBasicRailMetadata(worldObj, this, var9, var10, var11);
    648
    649                par3 = (double)var10;
    650
    651                if (var13 >= 2 && var13 <= 5)
    652                {
    653                    par3 = (double)(var10 + 1);
    654                }
    655
    656                int[][] var14 = field_70500_g[var13];
    657                double var15 = (double)(var14[1][0] - var14[0][0]);
    658                double var17 = (double)(var14[1][2] - var14[0][2]);
    659                double var19 = Math.sqrt(var15 * var15 + var17 * var17);
    660                var15 /= var19;
    661                var17 /= var19;
    662                par1 += var15 * par7;
    663                par5 += var17 * par7;
    664
    665                if (var14[0][1] != 0 && MathHelper.floor_double(par1) - var9 == var14[0][0] && MathHelper.floor_double(par5) - var11 == var14[0][2])
    666                {
    667                    par3 += (double)var14[0][1];
    668                }
    669                else if (var14[1][1] != 0 && MathHelper.floor_double(par1) - var9 == var14[1][0] && MathHelper.floor_double(par5) - var11 == var14[1][2])
    670                {
    671                    par3 += (double)var14[1][1];
    672                }
    673
    674                return this.func_70489_a(par1, par3, par5);
    675            }
    676        }
    677
    678        public Vec3 func_70489_a(double par1, double par3, double par5)
    679        {
    680            int var7 = MathHelper.floor_double(par1);
    681            int var8 = MathHelper.floor_double(par3);
    682            int var9 = MathHelper.floor_double(par5);
    683
    684            if (BlockRail.isRailBlockAt(this.worldObj, var7, var8 - 1, var9))
    685            {
    686                --var8;
    687            }
    688
    689            int var10 = this.worldObj.getBlockId(var7, var8, var9);
    690
    691            if (BlockRail.isRailBlock(var10))
    692            {
    693                int var11 = ((BlockRail)Block.blocksList[var10]).getBasicRailMetadata(worldObj, this, var7, var8, var9);
    694                par3 = (double)var8;
    695
    696                if (var11 >= 2 && var11 <= 5)
    697                {
    698                    par3 = (double)(var8 + 1);
    699                }
    700
    701                int[][] var12 = field_70500_g[var11];
    702                double var13 = 0.0D;
    703                double var15 = (double)var7 + 0.5D + (double)var12[0][0] * 0.5D;
    704                double var17 = (double)var8 + 0.5D + (double)var12[0][1] * 0.5D;
    705                double var19 = (double)var9 + 0.5D + (double)var12[0][2] * 0.5D;
    706                double var21 = (double)var7 + 0.5D + (double)var12[1][0] * 0.5D;
    707                double var23 = (double)var8 + 0.5D + (double)var12[1][1] * 0.5D;
    708                double var25 = (double)var9 + 0.5D + (double)var12[1][2] * 0.5D;
    709                double var27 = var21 - var15;
    710                double var29 = (var23 - var17) * 2.0D;
    711                double var31 = var25 - var19;
    712
    713                if (var27 == 0.0D)
    714                {
    715                    par1 = (double)var7 + 0.5D;
    716                    var13 = par5 - (double)var9;
    717                }
    718                else if (var31 == 0.0D)
    719                {
    720                    par5 = (double)var9 + 0.5D;
    721                    var13 = par1 - (double)var7;
    722                }
    723                else
    724                {
    725                    double var33 = par1 - var15;
    726                    double var35 = par5 - var19;
    727                    var13 = (var33 * var27 + var35 * var31) * 2.0D;
    728                }
    729
    730                par1 = var15 + var27 * var13;
    731                par3 = var17 + var29 * var13;
    732                par5 = var19 + var31 * var13;
    733
    734                if (var29 < 0.0D)
    735                {
    736                    ++par3;
    737                }
    738
    739                if (var29 > 0.0D)
    740                {
    741                    par3 += 0.5D;
    742                }
    743
    744                return this.worldObj.getWorldVec3Pool().getVecFromPool(par1, par3, par5);
    745            }
    746            else
    747            {
    748                return null;
    749            }
    750        }
    751
    752        /**
    753         * (abstract) Protected helper method to write subclass entity data to NBT.
    754         */
    755        protected void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
    756        {
    757            par1NBTTagCompound.setInteger("Type", this.minecartType);
    758
    759            if (isPoweredCart())
    760            {
    761                par1NBTTagCompound.setDouble("PushX", this.pushX);
    762                par1NBTTagCompound.setDouble("PushZ", this.pushZ);
    763                par1NBTTagCompound.setInteger("Fuel", this.fuel);
    764            }
    765
    766            if (getSizeInventory() > 0)
    767            {
    768                NBTTagList var2 = new NBTTagList();
    769
    770                for (int var3 = 0; var3 < this.cargoItems.length; ++var3)
    771                {
    772                    if (this.cargoItems[var3] != null)
    773                    {
    774                        NBTTagCompound var4 = new NBTTagCompound();
    775                        var4.setByte("Slot", (byte)var3);
    776                        this.cargoItems[var3].writeToNBT(var4);
    777                        var2.appendTag(var4);
    778                    }
    779                }
    780
    781                par1NBTTagCompound.setTag("Items", var2);
    782            }
    783        }
    784
    785        /**
    786         * (abstract) Protected helper method to read subclass entity data from NBT.
    787         */
    788        protected void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
    789        {
    790            this.minecartType = par1NBTTagCompound.getInteger("Type");
    791
    792            if (isPoweredCart())
    793            {
    794                this.pushX = par1NBTTagCompound.getDouble("PushX");
    795                this.pushZ = par1NBTTagCompound.getDouble("PushZ");
    796                try
    797                {
    798                    this.fuel = par1NBTTagCompound.getInteger("Fuel");
    799                }
    800                catch (ClassCastException e)
    801                {
    802                    this.fuel = par1NBTTagCompound.getShort("Fuel");
    803                }
    804            }
    805
    806            if (getSizeInventory() > 0)
    807            {
    808                NBTTagList var2 = par1NBTTagCompound.getTagList("Items");
    809                this.cargoItems = new ItemStack[this.getSizeInventory()];
    810
    811                for (int var3 = 0; var3 < var2.tagCount(); ++var3)
    812                {
    813                    NBTTagCompound var4 = (NBTTagCompound)var2.tagAt(var3);
    814                    int var5 = var4.getByte("Slot") & 255;
    815
    816                    if (var5 >= 0 && var5 < this.cargoItems.length)
    817                    {
    818                        this.cargoItems[var5] = ItemStack.loadItemStackFromNBT(var4);
    819                    }
    820                }
    821            }
    822        }
    823
    824        @SideOnly(Side.CLIENT)
    825        public float getShadowSize()
    826        {
    827            return 0.0F;
    828        }
    829
    830        /**
    831         * Applies a velocity to each of the entities pushing them away from each other. Args: entity
    832         */
    833        public void applyEntityCollision(Entity par1Entity)
    834        {
    835            MinecraftForge.EVENT_BUS.post(new MinecartCollisionEvent(this, par1Entity));
    836            if (getCollisionHandler() != null)
    837            {
    838                getCollisionHandler().onEntityCollision(this, par1Entity);
    839                return;
    840            }
    841            if (!this.worldObj.isRemote)
    842            {
    843                if (par1Entity != this.riddenByEntity)
    844                {
    845                    if (par1Entity instanceof EntityLiving && !(par1Entity instanceof EntityPlayer) && !(par1Entity instanceof EntityIronGolem) && canBeRidden() && this.motionX * this.motionX + this.motionZ * this.motionZ > 0.01D && this.riddenByEntity == null && par1Entity.ridingEntity == null)
    846                    {
    847                        par1Entity.mountEntity(this);
    848                    }
    849
    850                    double var2 = par1Entity.posX - this.posX;
    851                    double var4 = par1Entity.posZ - this.posZ;
    852                    double var6 = var2 * var2 + var4 * var4;
    853
    854                    if (var6 >= 9.999999747378752E-5D)
    855                    {
    856                        var6 = (double)MathHelper.sqrt_double(var6);
    857                        var2 /= var6;
    858                        var4 /= var6;
    859                        double var8 = 1.0D / var6;
    860
    861                        if (var8 > 1.0D)
    862                        {
    863                            var8 = 1.0D;
    864                        }
    865
    866                        var2 *= var8;
    867                        var4 *= var8;
    868                        var2 *= 0.10000000149011612D;
    869                        var4 *= 0.10000000149011612D;
    870                        var2 *= (double)(1.0F - this.entityCollisionReduction);
    871                        var4 *= (double)(1.0F - this.entityCollisionReduction);
    872                        var2 *= 0.5D;
    873                        var4 *= 0.5D;
    874
    875                        if (par1Entity instanceof EntityMinecart)
    876                        {
    877                            double var10 = par1Entity.posX - this.posX;
    878                            double var12 = par1Entity.posZ - this.posZ;
    879                            Vec3 var14 = this.worldObj.getWorldVec3Pool().getVecFromPool(var10, 0.0D, var12).normalize();
    880                            Vec3 var15 = this.worldObj.getWorldVec3Pool().getVecFromPool((double)MathHelper.cos(this.rotationYaw * (float)Math.PI / 180.0F), 0.0D, (double)MathHelper.sin(this.rotationYaw * (float)Math.PI / 180.0F)).normalize();
    881                            double var16 = Math.abs(var14.dotProduct(var15));
    882
    883                            if (var16 < 0.800000011920929D)
    884                            {
    885                                return;
    886                            }
    887
    888                            double var18 = par1Entity.motionX + this.motionX;
    889                            double var20 = par1Entity.motionZ + this.motionZ;
    890
    891                            if (((EntityMinecart)par1Entity).isPoweredCart() && !isPoweredCart())
    892                            {
    893                                this.motionX *= 0.20000000298023224D;
    894                                this.motionZ *= 0.20000000298023224D;
    895                                this.addVelocity(par1Entity.motionX - var2, 0.0D, par1Entity.motionZ - var4);
    896                                par1Entity.motionX *= 0.949999988079071D;
    897                                par1Entity.motionZ *= 0.949999988079071D;
    898                            }
    899                            else if (!((EntityMinecart)par1Entity).isPoweredCart() && isPoweredCart())
    900                            {
    901                                par1Entity.motionX *= 0.20000000298023224D;
    902                                par1Entity.motionZ *= 0.20000000298023224D;
    903                                par1Entity.addVelocity(this.motionX + var2, 0.0D, this.motionZ + var4);
    904                                this.motionX *= 0.949999988079071D;
    905                                this.motionZ *= 0.949999988079071D;
    906                            }
    907                            else
    908                            {
    909                                var18 /= 2.0D;
    910                                var20 /= 2.0D;
    911                                this.motionX *= 0.20000000298023224D;
    912                                this.motionZ *= 0.20000000298023224D;
    913                                this.addVelocity(var18 - var2, 0.0D, var20 - var4);
    914                                par1Entity.motionX *= 0.20000000298023224D;
    915                                par1Entity.motionZ *= 0.20000000298023224D;
    916                                par1Entity.addVelocity(var18 + var2, 0.0D, var20 + var4);
    917                            }
    918                        }
    919                        else
    920                        {
    921                            this.addVelocity(-var2, 0.0D, -var4);
    922                            par1Entity.addVelocity(var2 / 4.0D, 0.0D, var4 / 4.0D);
    923                        }
    924                    }
    925                }
    926            }
    927        }
    928
    929        /**
    930         * Returns the number of slots in the inventory.
    931         */
    932        public int getSizeInventory()
    933        {
    934            return (minecartType == 1 && getClass() == EntityMinecart.class ? 27 : 0);
    935        }
    936
    937        /**
    938         * Returns the stack in slot i
    939         */
    940        public ItemStack getStackInSlot(int par1)
    941        {
    942            return this.cargoItems[par1];
    943        }
    944
    945        /**
    946         * Removes from an inventory slot (first arg) up to a specified number (second arg) of items and returns them in a
    947         * new stack.
    948         */
    949        public ItemStack decrStackSize(int par1, int par2)
    950        {
    951            if (this.cargoItems[par1] != null)
    952            {
    953                ItemStack var3;
    954
    955                if (this.cargoItems[par1].stackSize <= par2)
    956                {
    957                    var3 = this.cargoItems[par1];
    958                    this.cargoItems[par1] = null;
    959                    return var3;
    960                }
    961                else
    962                {
    963                    var3 = this.cargoItems[par1].splitStack(par2);
    964
    965                    if (this.cargoItems[par1].stackSize == 0)
    966                    {
    967                        this.cargoItems[par1] = null;
    968                    }
    969
    970                    return var3;
    971                }
    972            }
    973            else
    974            {
    975                return null;
    976            }
    977        }
    978
    979        /**
    980         * When some containers are closed they call this on each slot, then drop whatever it returns as an EntityItem -
    981         * like when you close a workbench GUI.
    982         */
    983        public ItemStack getStackInSlotOnClosing(int par1)
    984        {
    985            if (this.cargoItems[par1] != null)
    986            {
    987                ItemStack var2 = this.cargoItems[par1];
    988                this.cargoItems[par1] = null;
    989                return var2;
    990            }
    991            else
    992            {
    993                return null;
    994            }
    995        }
    996
    997        /**
    998         * Sets the given item stack to the specified slot in the inventory (can be crafting or armor sections).
    999         */
    1000        public void setInventorySlotContents(int par1, ItemStack par2ItemStack)
    1001        {
    1002            this.cargoItems[par1] = par2ItemStack;
    1003
    1004            if (par2ItemStack != null && par2ItemStack.stackSize > this.getInventoryStackLimit())
    1005            {
    1006                par2ItemStack.stackSize = this.getInventoryStackLimit();
    1007            }
    1008        }
    1009
    1010        /**
    1011         * Returns the name of the inventory.
    1012         */
    1013        public String getInvName()
    1014        {
    1015            return "container.minecart";
    1016        }
    1017
    1018        /**
    1019         * Returns the maximum stack size for a inventory slot. Seems to always be 64, possibly will be extended. *Isn't
    1020         * this more of a set than a get?*
    1021         */
    1022        public int getInventoryStackLimit()
    1023        {
    1024            return 64;
    1025        }
    1026
    1027        /**
    1028         * Called when an the contents of an Inventory change, usually
    1029         */
    1030        public void onInventoryChanged() {}
    1031
    1032        /**
    1033         * Called when a player interacts with a mob. e.g. gets milk from a cow, gets into the saddle on a pig.
    1034         */
    1035        public boolean interact(EntityPlayer par1EntityPlayer)
    1036        {
    1037            if (MinecraftForge.EVENT_BUS.post(new MinecartInteractEvent(this, par1EntityPlayer)))
    1038            {
    1039                return true;
    1040            }
    1041
    1042            if (canBeRidden())
    1043            {
    1044                if (this.riddenByEntity != null && this.riddenByEntity instanceof EntityPlayer && this.riddenByEntity != par1EntityPlayer)
    1045                {
    1046                    return true;
    1047                }
    1048
    1049                if (!this.worldObj.isRemote)
    1050                {
    1051                    par1EntityPlayer.mountEntity(this);
    1052                }
    1053            }
    1054            else if (getSizeInventory() > 0)
    1055            {
    1056                if (!this.worldObj.isRemote)
    1057                {
    1058                    par1EntityPlayer.displayGUIChest(this);
    1059                }
    1060            }
    1061            else if (this.minecartType == 2 && getClass() == EntityMinecart.class)
    1062            {
    1063                ItemStack var2 = par1EntityPlayer.inventory.getCurrentItem();
    1064
    1065                if (var2 != null && var2.itemID == Item.coal.shiftedIndex)
    1066                {
    1067                    if (--var2.stackSize == 0)
    1068                    {
    1069                        par1EntityPlayer.inventory.setInventorySlotContents(par1EntityPlayer.inventory.currentItem, (ItemStack)null);
    1070                    }
    1071
    1072                    this.fuel += 3600;
    1073                }
    1074
    1075                this.pushX = this.posX - par1EntityPlayer.posX;
    1076                this.pushZ = this.posZ - par1EntityPlayer.posZ;
    1077            }
    1078
    1079            return true;
    1080        }
    1081
    1082        @SideOnly(Side.CLIENT)
    1083
    1084        /**
    1085         * Sets the position and rotation. Only difference from the other one is no bounding on the rotation. Args: posX,
    1086         * posY, posZ, yaw, pitch
    1087         */
    1088        public void setPositionAndRotation2(double par1, double par3, double par5, float par7, float par8, int par9)
    1089        {
    1090            this.minecartX = par1;
    1091            this.minecartY = par3;
    1092            this.minecartZ = par5;
    1093            this.minecartYaw = (double)par7;
    1094            this.minecartPitch = (double)par8;
    1095            this.turnProgress = par9 + 2;
    1096            this.motionX = this.velocityX;
    1097            this.motionY = this.velocityY;
    1098            this.motionZ = this.velocityZ;
    1099        }
    1100
    1101        @SideOnly(Side.CLIENT)
    1102
    1103        /**
    1104         * Sets the velocity to the args. Args: x, y, z
    1105         */
    1106        public void setVelocity(double par1, double par3, double par5)
    1107        {
    1108            this.velocityX = this.motionX = par1;
    1109            this.velocityY = this.motionY = par3;
    1110            this.velocityZ = this.motionZ = par5;
    1111        }
    1112
    1113        /**
    1114         * Do not make give this method the name canInteractWith because it clashes with Container
    1115         */
    1116        public boolean isUseableByPlayer(EntityPlayer par1EntityPlayer)
    1117        {
    1118            return this.isDead ? false : par1EntityPlayer.getDistanceSqToEntity(this) <= 64.0D;
    1119        }
    1120
    1121        /**
    1122         * Is this minecart powered (Fuel > 0)
    1123         */
    1124        public boolean isMinecartPowered()
    1125        {
    1126            return (this.dataWatcher.getWatchableObjectByte(16) & 1) != 0;
    1127        }
    1128
    1129        /**
    1130         * Set if this minecart is powered (Fuel > 0)
    1131         */
    1132        protected void setMinecartPowered(boolean par1)
    1133        {
    1134            if (par1)
    1135            {
    1136                this.dataWatcher.updateObject(16, Byte.valueOf((byte)(this.dataWatcher.getWatchableObjectByte(16) | 1)));
    1137            }
    1138            else
    1139            {
    1140                this.dataWatcher.updateObject(16, Byte.valueOf((byte)(this.dataWatcher.getWatchableObjectByte(16) & -2)));
    1141            }
    1142        }
    1143
    1144        public void openChest() {}
    1145
    1146        public void closeChest() {}
    1147
    1148        /**
    1149         * Sets the current amount of damage the minecart has taken. Decreases over time. The cart breaks when this is over
    1150         * 40.
    1151         */
    1152        public void setDamage(int par1)
    1153        {
    1154            this.dataWatcher.updateObject(19, Integer.valueOf(par1));
    1155        }
    1156
    1157        /**
    1158         * Gets the current amount of damage the minecart has taken. Decreases over time. The cart breaks when this is over
    1159         * 40.
    1160         */
    1161        public int getDamage()
    1162        {
    1163            return this.dataWatcher.getWatchableObjectInt(19);
    1164        }
    1165
    1166        public void func_70497_h(int par1)
    1167        {
    1168            this.dataWatcher.updateObject(17, Integer.valueOf(par1));
    1169        }
    1170
    1171        public int func_70496_j()
    1172        {
    1173            return this.dataWatcher.getWatchableObjectInt(17);
    1174        }
    1175
    1176        public void func_70494_i(int par1)
    1177        {
    1178            this.dataWatcher.updateObject(18, Integer.valueOf(par1));
    1179        }
    1180
    1181        public int func_70493_k()
    1182        {
    1183            return this.dataWatcher.getWatchableObjectInt(18);
    1184        }
    1185
    1186        /**
    1187         * Drops the cart as a item. The exact item dropped is defined by getItemDropped().
    1188         */
    1189        public void dropCartAsItem()
    1190        {
    1191            for(ItemStack item : getItemsDropped())
    1192            {
    1193                entityDropItem(item, 0);
    1194            }
    1195        }
    1196
    1197        /**
    1198         * Override this to define which items your cart drops when broken.
    1199         * This does not include items contained in the inventory,
    1200         * that is handled elsewhere.
    1201         * @return A list of items dropped.
    1202         */
    1203        public List<ItemStack> getItemsDropped()
    1204        {
    1205            List<ItemStack> items = new ArrayList<ItemStack>();
    1206            items.add(new ItemStack(Item.minecartEmpty));
    1207
    1208            switch(minecartType)
    1209            {
    1210                case 1:
    1211                    items.add(new ItemStack(Block.chest));
    1212                    break;
    1213                case 2:
    1214                    items.add(new ItemStack(Block.stoneOvenIdle));
    1215                    break;
    1216            }
    1217            return items;
    1218        }
    1219
    1220        /**
    1221         * This function returns an ItemStack that represents this cart.
    1222         * This should be an ItemStack that can be used by the player to place the cart.
    1223         * This is the item that was registered with the cart via the registerMinecart function,
    1224         * but is not necessary the item the cart drops when destroyed.
    1225         * @return An ItemStack that can be used to place the cart.
    1226         */
    1227        public ItemStack getCartItem()
    1228        {
    1229            return MinecartRegistry.getItemForCart(this);
    1230        }
    1231
    1232        /**
    1233         * Returns true if this cart is self propelled.
    1234         * @return True if powered.
    1235         */
    1236        public boolean isPoweredCart()
    1237        {
    1238            return minecartType == 2 && getClass() == EntityMinecart.class;
    1239        }
    1240
    1241        /**
    1242         * Returns true if this cart is a storage cart
    1243         * Some carts may have inventories but not be storage carts
    1244         * and some carts without inventories may be storage carts.
    1245         * @return True if this cart should be classified as a storage cart.
    1246         */
    1247        public boolean isStorageCart()
    1248        {
    1249            return minecartType == 1 && getClass() == EntityMinecart.class;
    1250        }
    1251
    1252        /**
    1253         * Returns true if this cart can be ridden by an Entity.
    1254         * @return True if this cart can be ridden.
    1255         */
    1256        public boolean canBeRidden()
    1257        {
    1258            if(minecartType == 0 && getClass() == EntityMinecart.class)
    1259            {
    1260                return true;
    1261            }
    1262            return false;
    1263        }
    1264
    1265        /**
    1266         * Returns true if this cart can currently use rails.
    1267         * This function is mainly used to gracefully detach a minecart from a rail.
    1268         * @return True if the minecart can use rails.
    1269         */
    1270        public boolean canUseRail()
    1271        {
    1272            return canUseRail;
    1273        }
    1274
    1275        /**
    1276         * Set whether the minecart can use rails.
    1277         * This function is mainly used to gracefully detach a minecart from a rail.
    1278         * @param use Whether the minecart can currently use rails.
    1279         */
    1280        public void setCanUseRail(boolean use)
    1281        {
    1282            canUseRail = use;
    1283        }
    1284
    1285        /**
    1286         * Return false if this cart should not call IRail.onMinecartPass() and should ignore Powered Rails.
    1287         * @return True if this cart should call IRail.onMinecartPass().
    1288         */
    1289        public boolean shouldDoRailFunctions()
    1290        {
    1291            return true;
    1292        }
    1293
    1294        /**
    1295         * Simply returns the minecartType variable.
    1296         * @return minecartType
    1297         */
    1298        public int getMinecartType()
    1299        {
    1300            return minecartType;
    1301        }
    1302
    1303        /**
    1304         * Gets the current global Minecart Collision handler if none
    1305         * is registered, returns null
    1306         * @return The collision handler or null
    1307         */
    1308        public static IMinecartCollisionHandler getCollisionHandler()
    1309        {
    1310            return collisionHandler;
    1311        }
    1312
    1313        /**
    1314         * Sets the global Minecart Collision handler, overwrites any
    1315         * that is currently set.
    1316         * @param handler The new handler
    1317         */
    1318        public static void setCollisionHandler(IMinecartCollisionHandler handler)
    1319        {
    1320            collisionHandler = handler;
    1321        }
    1322
    1323        /**
    1324         * Carts should return their drag factor here
    1325         * @return The drag rate.
    1326         */
    1327        protected double getDrag()
    1328        {
    1329            return riddenByEntity != null ? defaultDragRidden : defaultDragEmpty;
    1330        }
    1331
    1332        /**
    1333         * Moved to allow overrides.
    1334         * This code applies drag and updates push forces.
    1335         */
    1336        protected void applyDragAndPushForces()
    1337        {
    1338            if(isPoweredCart())
    1339            {
    1340                double d27 = MathHelper.sqrt_double(pushX * pushX + pushZ * pushZ);
    1341                if(d27 > 0.01D)
    1342                {
    1343                    pushX /= d27;
    1344                    pushZ /= d27;
    1345                    double d29 = 0.04;
    1346                    motionX *= 0.8D;
    1347                    motionY *= 0.0D;
    1348                    motionZ *= 0.8D;
    1349                    motionX += pushX * d29;
    1350                    motionZ += pushZ * d29;
    1351                }
    1352                else
    1353                {
    1354                    motionX *= 0.9D;
    1355                    motionY *= 0.0D;
    1356                    motionZ *= 0.9D;
    1357                }
    1358            }
    1359            motionX *= getDrag();
    1360            motionY *= 0.0D;
    1361            motionZ *= getDrag();
    1362        }
    1363
    1364        /**
    1365         * Moved to allow overrides.
    1366         * This code updates push forces.
    1367         */
    1368        protected void updatePushForces()
    1369        {
    1370            if(isPoweredCart())
    1371            {
    1372                double push = MathHelper.sqrt_double(pushX * pushX + pushZ * pushZ);
    1373                if(push > 0.01D && motionX * motionX + motionZ * motionZ > 0.001D)
    1374                {
    1375                    pushX /= push;
    1376                    pushZ /= push;
    1377                    if(pushX * motionX + pushZ * motionZ < 0.0D)
    1378                    {
    1379                        pushX = 0.0D;
    1380                        pushZ = 0.0D;
    1381                    }
    1382                    else
    1383                    {
    1384                        pushX = motionX;
    1385                        pushZ = motionZ;
    1386                    }
    1387                }
    1388            }
    1389        }
    1390
    1391        /**
    1392         * Moved to allow overrides.
    1393         * This code handles minecart movement and speed capping when on a rail.
    1394         */
    1395        protected void moveMinecartOnRail(int i, int j, int k)
    1396        {
    1397            int id = worldObj.getBlockId(i, j, k);
    1398            if (!BlockRail.isRailBlock(id))
    1399            {
    1400                    return;
    1401            }
    1402            float railMaxSpeed = ((BlockRail)Block.blocksList[id]).getRailMaxSpeed(worldObj, this, i, j, k);
    1403
    1404            double maxSpeed = Math.min(railMaxSpeed, getMaxSpeedRail());
    1405            double mX = motionX;
    1406            double mZ = motionZ;
    1407            if(riddenByEntity != null)
    1408            {
    1409                mX *= 0.75D;
    1410                mZ *= 0.75D;
    1411            }
    1412            if(mX < -maxSpeed) mX = -maxSpeed;
    1413            if(mX >  maxSpeed) mX =  maxSpeed;
    1414            if(mZ < -maxSpeed) mZ = -maxSpeed;
    1415            if(mZ >  maxSpeed) mZ =  maxSpeed;
    1416            moveEntity(mX, 0.0D, mZ);
    1417        }
    1418
    1419        /**
    1420         * Moved to allow overrides.
    1421         * This code handles minecart movement and speed capping when not on a rail.
    1422         */
    1423        protected void moveMinecartOffRail(int i, int j, int k)
    1424        {
    1425            double d2 = getMaxSpeedGround();
    1426            if(!onGround)
    1427            {
    1428                d2 = getMaxSpeedAirLateral();
    1429            }
    1430            if(motionX < -d2) motionX = -d2;
    1431            if(motionX >  d2) motionX =  d2;
    1432            if(motionZ < -d2) motionZ = -d2;
    1433            if(motionZ >  d2) motionZ =  d2;
    1434            double moveY = motionY;
    1435            if(getMaxSpeedAirVertical() > 0 && motionY > getMaxSpeedAirVertical())
    1436            {
    1437                moveY = getMaxSpeedAirVertical();
    1438                if(Math.abs(motionX) < 0.3f && Math.abs(motionZ) < 0.3f)
    1439                {
    1440                    moveY = 0.15f;
    1441                    motionY = moveY;
    1442                }
    1443            }
    1444            if(onGround)
    1445            {
    1446                motionX *= 0.5D;
    1447                motionY *= 0.5D;
    1448                motionZ *= 0.5D;
    1449            }
    1450            moveEntity(motionX, moveY, motionZ);
    1451            if(!onGround)
    1452            {
    1453                motionX *= getDragAir();
    1454                motionY *= getDragAir();
    1455                motionZ *= getDragAir();
    1456            }
    1457        }
    1458
    1459        /**
    1460         * Moved to allow overrides.
    1461         * This code applies fuel consumption.
    1462         */
    1463        protected void updateFuel()
    1464        {
    1465            if (fuel > 0) fuel--;
    1466            if (fuel <= 0) pushX = pushZ = 0.0D;
    1467            setMinecartPowered(fuel > 0);
    1468        }
    1469
    1470        /**
    1471         * Moved to allow overrides, This code handle slopes affecting velocity.
    1472         * @param metadata The blocks position metadata
    1473         */
    1474        protected void adjustSlopeVelocities(int metadata)
    1475        {
    1476            double acceleration = 0.0078125D;
    1477            if (metadata == 2)
    1478            {
    1479                motionX -= acceleration;
    1480            }
    1481            else if (metadata == 3)
    1482            {
    1483                motionX += acceleration;
    1484            }
    1485            else if (metadata == 4)
    1486            {
    1487                motionZ += acceleration;
    1488            }
    1489            else if (metadata == 5)
    1490            {
    1491                motionZ -= acceleration;
    1492            }
    1493        }
    1494
    1495        /**
    1496         * Getters/setters for physics variables
    1497         */
    1498
    1499        /**
    1500         * Returns the carts max speed.
    1501         * Carts going faster than 1.1 cause issues with chunk loading.
    1502         * Carts cant traverse slopes or corners at greater than 0.5 - 0.6.
    1503         * This value is compared with the rails max speed to determine
    1504         * the carts current max speed. A normal rails max speed is 0.4.
    1505         * @return Carts max speed.
    1506         */
    1507        public float getMaxSpeedRail()
    1508        {
    1509            return maxSpeedRail;
    1510        }
    1511
    1512        public void setMaxSpeedRail(float value)
    1513        {
    1514            maxSpeedRail = value;
    1515        }
    1516
    1517        public float getMaxSpeedGround()
    1518        {
    1519            return maxSpeedGround;
    1520        }
    1521
    1522        public void setMaxSpeedGround(float value)
    1523        {
    1524            maxSpeedGround = value;
    1525        }
    1526
    1527        public float getMaxSpeedAirLateral()
    1528        {
    1529            return maxSpeedAirLateral;
    1530        }
    1531
    1532        public void setMaxSpeedAirLateral(float value)
    1533        {
    1534            maxSpeedAirLateral = value;
    1535        }
    1536
    1537        public float getMaxSpeedAirVertical()
    1538        {
    1539            return maxSpeedAirVertical;
    1540        }
    1541
    1542        public void setMaxSpeedAirVertical(float value)
    1543        {
    1544            maxSpeedAirVertical = value;
    1545        }
    1546
    1547        public double getDragAir()
    1548        {
    1549            return dragAir;
    1550        }
    1551
    1552        public void setDragAir(double value)
    1553        {
    1554            dragAir = value;
    1555        }
    1556    }