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