    001package net.minecraft.entity.item;
    002
    003import cpw.mods.fml.relauncher.Side;
    004import cpw.mods.fml.relauncher.SideOnly;
    005
    006import java.util.ArrayList;
    007import java.util.List;
    008import net.minecraft.block.Block;
    009import net.minecraft.block.BlockRail;
    010import net.minecraft.entity.Entity;
    011import net.minecraft.entity.EntityLiving;
    012import net.minecraft.entity.monster.EntityIronGolem;
    013import net.minecraft.entity.player.EntityPlayer;
    014import net.minecraft.inventory.IInventory;
    015import net.minecraft.item.Item;
    016import net.minecraft.item.ItemStack;
    017import net.minecraft.nbt.NBTTagCompound;
    018import net.minecraft.nbt.NBTTagList;
    019import net.minecraft.server.MinecraftServer;
    020import net.minecraft.server.gui.IUpdatePlayerListBox;
    021import net.minecraft.util.AxisAlignedBB;
    022import net.minecraft.util.DamageSource;
    023import net.minecraft.util.MathHelper;
    024import net.minecraft.util.Vec3;
    025import net.minecraft.world.World;
    026import net.minecraft.world.WorldServer;
    027
    028import net.minecraftforge.common.IMinecartCollisionHandler;
    029import net.minecraftforge.common.MinecartRegistry;
    030import net.minecraftforge.common.MinecraftForge;
    031import net.minecraftforge.event.entity.minecart.*;
    032
    033public class EntityMinecart extends Entity implements IInventory
    034{
    035    /** Array of item stacks stored in minecart (for storage minecarts). */
    036    protected ItemStack[] cargoItems;
    037    protected int fuel;
    038    protected boolean isInReverse;
    039
    040    /** The type of minecart, 2 for powered, 1 for storage. */
    041    public int minecartType;
    042    public double pushX;
    043    public double pushZ;
    044    protected final IUpdatePlayerListBox field_82344_g;
    045    protected boolean field_82345_h;
    046
    047    /** Minecart rotational logic matrix */
    048    protected static final int[][][] matrix = 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}}};
    049
    050    /** appears to be the progress of the turn */
    051    protected int turnProgress;
    052    protected double minecartX;
    053    protected double minecartY;
    054    protected double minecartZ;
    055    protected double minecartYaw;
    056    protected double minecartPitch;
    057    @SideOnly(Side.CLIENT)
    058    protected double velocityX;
    059    @SideOnly(Side.CLIENT)
    060    protected double velocityY;
    061    @SideOnly(Side.CLIENT)
    062    protected double velocityZ;
    063
    064    /* Forge: Minecart Compatibility Layer Integration. */
    065    public static float defaultMaxSpeedRail = 0.4f;
    066    public static float defaultMaxSpeedGround = 0.4f;
    067    public static float defaultMaxSpeedAirLateral = 0.4f;
    068    public static float defaultMaxSpeedAirVertical = -1f;
    069    public static double defaultDragRidden = 0.996999979019165D;
    070    public static double defaultDragEmpty = 0.9599999785423279D;
    071    public static double defaultDragAir = 0.94999998807907104D;
    072    protected boolean canUseRail = true;
    073    protected boolean canBePushed = true;
    074    private static IMinecartCollisionHandler collisionHandler = null;
    075
    076    /* Instance versions of the above physics properties */
    077    protected float maxSpeedRail;
    078    protected float maxSpeedGround;
    079    protected float maxSpeedAirLateral;
    080    protected float maxSpeedAirVertical;
    081    protected double dragAir;
    082
    083    public EntityMinecart(World par1World)
    084    {
    085        super(par1World);
    086        this.cargoItems = new ItemStack[36];
    087        this.fuel = 0;
    088        this.isInReverse = false;
    089        this.field_82345_h = true;
    090        this.preventEntitySpawning = true;
    091        this.setSize(0.98F, 0.7F);
    092        this.yOffset = this.height / 2.0F;
    093        this.field_82344_g = par1World != null ? par1World.func_82735_a(this) : null;
    094
    095        maxSpeedRail = defaultMaxSpeedRail;
    096        maxSpeedGround = defaultMaxSpeedGround;
    097        maxSpeedAirLateral = defaultMaxSpeedAirLateral;
    098        maxSpeedAirVertical = defaultMaxSpeedAirVertical;
    099        dragAir = defaultDragAir;
    100    }
    101
    102    public EntityMinecart(World world, int type)
    103    {
    104        this(world);
    105        minecartType = type;
    106    }
    107
    108    /**
    109     * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
    110     * prevent them from trampling crops
    111     */
    112    protected boolean canTriggerWalking()
    113    {
    114        return false;
    115    }
    116
    117    protected void entityInit()
    118    {
    119        this.dataWatcher.addObject(16, new Byte((byte)0));
    120        this.dataWatcher.addObject(17, new Integer(0));
    121        this.dataWatcher.addObject(18, new Integer(1));
    122        this.dataWatcher.addObject(19, new Integer(0));
    123    }
    124
    125    /**
    126     * Returns a boundingBox used to collide the entity with other entities and blocks. This enables the entity to be
    127     * pushable on contact, like boats or minecarts.
    128     */
    129    public AxisAlignedBB getCollisionBox(Entity par1Entity)
    130    {
    131        if (getCollisionHandler() != null)
    132        {
    133            return getCollisionHandler().getCollisionBox(this, par1Entity);
    134        }
    135        return par1Entity.canBePushed() ? par1Entity.boundingBox : null;
    136    }
    137
    138    /**
    139     * returns the bounding box for this entity
    140     */
    141    public AxisAlignedBB getBoundingBox()
    142    {
    143        if (getCollisionHandler() != null)
    144        {
    145            return getCollisionHandler().getBoundingBox(this);
    146        }
    147        return null;
    148    }
    149
    150    /**
    151     * Returns true if this entity should push and be pushed by other entities when colliding.
    152     */
    153    public boolean canBePushed()
    154    {
    155        return canBePushed;
    156    }
    157
    158    public EntityMinecart(World par1World, double par2, double par4, double par6, int par8)
    159    {
    160        this(par1World);
    161        this.setPosition(par2, par4 + (double)this.yOffset, par6);
    162        this.motionX = 0.0D;
    163        this.motionY = 0.0D;
    164        this.motionZ = 0.0D;
    165        this.prevPosX = par2;
    166        this.prevPosY = par4;
    167        this.prevPosZ = par6;
    168        this.minecartType = par8;
    169    }
    170
    171    /**
    172     * Returns the Y offset from the entity's position for any entity riding this one.
    173     */
    174    public double getMountedYOffset()
    175    {
    176        return (double)this.height * 0.0D - 0.30000001192092896D;
    177    }
    178
    179    /**
    180     * Called when the entity is attacked.
    181     */
    182    public boolean attackEntityFrom(DamageSource par1DamageSource, int par2)
    183    {
    184        if (!this.worldObj.isRemote && !this.isDead)
    185        {
    186            if (this.isEntityInvulnerable())
    187            {
    188                return false;
    189            }
    190            else
    191            {
    192                this.setRollingDirection(-this.getRollingDirection());
    193                this.setRollingAmplitude(10);
    194                this.setBeenAttacked();
    195                this.setDamage(this.getDamage() + par2 * 10);
    196
    197                if (par1DamageSource.getEntity() instanceof EntityPlayer && ((EntityPlayer)par1DamageSource.getEntity()).capabilities.isCreativeMode)
    198                {
    199                    this.setDamage(100);
    200                }
    201
    202                if (this.getDamage() > 40)
    203                {
    204                    if (this.riddenByEntity != null)
    205                    {
    206                        this.riddenByEntity.mountEntity(this);
    207                    }
    208
    209                    this.setDead();
    210                    dropCartAsItem();
    211                }
    212
    213                return true;
    214            }
    215        }
    216        else
    217        {
    218            return true;
    219        }
    220    }
    221
    222    @SideOnly(Side.CLIENT)
    223
    224    /**
    225     * Setups the entity to do the hurt animation. Only used by packets in multiplayer.
    226     */
    227    public void performHurtAnimation()
    228    {
    229        this.setRollingDirection(-this.getRollingDirection());
    230        this.setRollingAmplitude(10);
    231        this.setDamage(this.getDamage() + this.getDamage() * 10);
    232    }
    233
    234    /**
    235     * Returns true if other Entities should be prevented from moving through this Entity.
    236     */
    237    public boolean canBeCollidedWith()
    238    {
    239        return !this.isDead;
    240    }
    241
    242    /**
    243     * Will get destroyed next tick.
    244     */
    245    public void setDead()
    246    {
    247        if (this.field_82345_h)
    248        {
    249            for (int var1 = 0; var1 < this.getSizeInventory(); ++var1)
    250            {
    251                ItemStack var2 = this.getStackInSlot(var1);
    252
    253                if (var2 != null)
    254                {
    255                    float var3 = this.rand.nextFloat() * 0.8F + 0.1F;
    256                    float var4 = this.rand.nextFloat() * 0.8F + 0.1F;
    257                    float var5 = this.rand.nextFloat() * 0.8F + 0.1F;
    258
    259                    while (var2.stackSize > 0)
    260                    {
    261                        int var6 = this.rand.nextInt(21) + 10;
    262
    263                        if (var6 > var2.stackSize)
    264                        {
    265                            var6 = var2.stackSize;
    266                        }
    267
    268                        var2.stackSize -= var6;
    269                        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()));
    270
    271                        if (var2.hasTagCompound())
    272                        {
    273                            var7.getEntityItem().setTagCompound((NBTTagCompound)var2.getTagCompound().copy());
    274                        }
    275
    276                        float var8 = 0.05F;
    277                        var7.motionX = (double)((float)this.rand.nextGaussian() * var8);
    278                        var7.motionY = (double)((float)this.rand.nextGaussian() * var8 + 0.2F);
    279                        var7.motionZ = (double)((float)this.rand.nextGaussian() * var8);
    280                        this.worldObj.spawnEntityInWorld(var7);
    281                    }
    282                }
    283            }
    284        }
    285
    286        super.setDead();
    287
    288        if (this.field_82344_g != null)
    289        {
    290            this.field_82344_g.update();
    291        }
    292    }
    293
    294    /**
    295     * Teleports the entity to another dimension. Params: Dimension number to teleport to
    296     */
    297    public void travelToDimension(int par1)
    298    {
    299        this.field_82345_h = false;
    300        super.travelToDimension(par1);
    301    }
    302
    303    /**
    304     * Called to update the entity's position/logic.
    305     */
    306    public void onUpdate()
    307    {
    308        if (this.field_82344_g != null)
    309        {
    310            this.field_82344_g.update();
    311        }
    312
    313        if (this.getRollingAmplitude() > 0)
    314        {
    315            this.setRollingAmplitude(this.getRollingAmplitude() - 1);
    316        }
    317
    318        if (this.getDamage() > 0)
    319        {
    320            this.setDamage(this.getDamage() - 1);
    321        }
    322
    323        if (this.posY < -64.0D)
    324        {
    325            this.kill();
    326        }
    327
    328        if (this.isMinecartPowered() && this.rand.nextInt(4) == 0 && minecartType == 2 && getClass() == EntityMinecart.class)
    329        {
    330            this.worldObj.spawnParticle("largesmoke", this.posX, this.posY + 0.8D, this.posZ, 0.0D, 0.0D, 0.0D);
    331        }
    332
    333        int var2;
    334
    335        if (!this.worldObj.isRemote && this.worldObj instanceof WorldServer)
    336        {
    337            this.worldObj.theProfiler.startSection("portal");
    338            MinecraftServer var1 = ((WorldServer)this.worldObj).getMinecraftServer();
    339            var2 = this.getMaxInPortalTime();
    340
    341            if (this.inPortal)
    342            {
    343                if (var1.getAllowNether())
    344                {
    345                    if (this.ridingEntity == null && this.timeInPortal++ >= var2)
    346                    {
    347                        this.timeInPortal = var2;
    348                        this.timeUntilPortal = this.getPortalCooldown();
    349                        byte var3;
    350
    351                        if (this.worldObj.provider.dimensionId == -1)
    352                        {
    353                            var3 = 0;
    354                        }
    355                        else
    356                        {
    357                            var3 = -1;
    358                        }
    359
    360                        this.travelToDimension(var3);
    361                    }
    362
    363                    this.inPortal = false;
    364                }
    365            }
    366            else
    367            {
    368                if (this.timeInPortal > 0)
    369                {
    370                    this.timeInPortal -= 4;
    371                }
    372
    373                if (this.timeInPortal < 0)
    374                {
    375                    this.timeInPortal = 0;
    376                }
    377            }
    378
    379            if (this.timeUntilPortal > 0)
    380            {
    381                --this.timeUntilPortal;
    382            }
    383
    384            this.worldObj.theProfiler.endSection();
    385        }
    386
    387        if (this.worldObj.isRemote)
    388        {
    389            if (this.turnProgress > 0)
    390            {
    391                double var46 = this.posX + (this.minecartX - this.posX) / (double)this.turnProgress;
    392                double var48 = this.posY + (this.minecartY - this.posY) / (double)this.turnProgress;
    393                double var5 = this.posZ + (this.minecartZ - this.posZ) / (double)this.turnProgress;
    394                double var7 = MathHelper.wrapAngleTo180_double(this.minecartYaw - (double)this.rotationYaw);
    395                this.rotationYaw = (float)((double)this.rotationYaw + var7 / (double)this.turnProgress);
    396                this.rotationPitch = (float)((double)this.rotationPitch + (this.minecartPitch - (double)this.rotationPitch) / (double)this.turnProgress);
    397                --this.turnProgress;
    398                this.setPosition(var46, var48, var5);
    399                this.setRotation(this.rotationYaw, this.rotationPitch);
    400            }
    401            else
    402            {
    403                this.setPosition(this.posX, this.posY, this.posZ);
    404                this.setRotation(this.rotationYaw, this.rotationPitch);
    405            }
    406        }
    407        else
    408        {
    409            this.prevPosX = this.posX;
    410            this.prevPosY = this.posY;
    411            this.prevPosZ = this.posZ;
    412            this.motionY -= 0.03999999910593033D;
    413            int var45 = MathHelper.floor_double(this.posX);
    414            var2 = MathHelper.floor_double(this.posY);
    415            int var47 = MathHelper.floor_double(this.posZ);
    416
    417            if (BlockRail.isRailBlockAt(this.worldObj, var45, var2 - 1, var47))
    418            {
    419                --var2;
    420            }
    421
    422            double var4 = 0.4D;
    423            double var6 = 0.0078125D;
    424            int var8 = this.worldObj.getBlockId(var45, var2, var47);
    425
    426            if (canUseRail() && BlockRail.isRailBlock(var8))
    427            {
    428                this.fallDistance = 0.0F;
    429                Vec3 var9 = this.func_70489_a(this.posX, this.posY, this.posZ);
    430                int var10 = ((BlockRail)Block.blocksList[var8]).getBasicRailMetadata(worldObj, this, var45, var2, var47);
    431                this.posY = (double)var2;
    432                boolean var11 = false;
    433                boolean var12 = false;
    434
    435                if (var8 == Block.railPowered.blockID)
    436                {
    437                    var11 = (worldObj.getBlockMetadata(var45, var2, var47) & 8) != 0;
    438                    var12 = !var11;
    439                }
    440
    441                if (((BlockRail)Block.blocksList[var8]).isPowered())
    442                {
    443                    var10 &= 7;
    444                }
    445
    446                if (var10 >= 2 && var10 <= 5)
    447                {
    448                    this.posY = (double)(var2 + 1);
    449                }
    450
    451                adjustSlopeVelocities(var10);
    452
    453                int[][] var13 = matrix[var10];
    454                double var14 = (double)(var13[1][0] - var13[0][0]);
    455                double var16 = (double)(var13[1][2] - var13[0][2]);
    456                double var18 = Math.sqrt(var14 * var14 + var16 * var16);
    457                double var20 = this.motionX * var14 + this.motionZ * var16;
    458
    459                if (var20 < 0.0D)
    460                {
    461                    var14 = -var14;
    462                    var16 = -var16;
    463                }
    464
    465                double var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
    466                this.motionX = var22 * var14 / var18;
    467                this.motionZ = var22 * var16 / var18;
    468                double var24;
    469                double var26;
    470
    471                if (this.riddenByEntity != null)
    472                {
    473                    var24 = this.riddenByEntity.motionX * this.riddenByEntity.motionX + this.riddenByEntity.motionZ * this.riddenByEntity.motionZ;
    474                    var26 = this.motionX * this.motionX + this.motionZ * this.motionZ;
    475
    476                    if (var24 > 1.0E-4D && var26 < 0.01D)
    477                    {
    478                        this.motionX += this.riddenByEntity.motionX * 0.1D;
    479                        this.motionZ += this.riddenByEntity.motionZ * 0.1D;
    480                        var12 = false;
    481                    }
    482                }
    483
    484                if (var12 && shouldDoRailFunctions())
    485                {
    486                    var24 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
    487
    488                    if (var24 < 0.03D)
    489                    {
    490                        this.motionX *= 0.0D;
    491                        this.motionY *= 0.0D;
    492                        this.motionZ *= 0.0D;
    493                    }
    494                    else
    495                    {
    496                        this.motionX *= 0.5D;
    497                        this.motionY *= 0.0D;
    498                        this.motionZ *= 0.5D;
    499                    }
    500                }
    501
    502                var24 = 0.0D;
    503                var26 = (double)var45 + 0.5D + (double)var13[0][0] * 0.5D;
    504                double var28 = (double)var47 + 0.5D + (double)var13[0][2] * 0.5D;
    505                double var30 = (double)var45 + 0.5D + (double)var13[1][0] * 0.5D;
    506                double var32 = (double)var47 + 0.5D + (double)var13[1][2] * 0.5D;
    507                var14 = var30 - var26;
    508                var16 = var32 - var28;
    509                double var34;
    510                double var36;
    511
    512                if (var14 == 0.0D)
    513                {
    514                    this.posX = (double)var45 + 0.5D;
    515                    var24 = this.posZ - (double)var47;
    516                }
    517                else if (var16 == 0.0D)
    518                {
    519                    this.posZ = (double)var47 + 0.5D;
    520                    var24 = this.posX - (double)var45;
    521                }
    522                else
    523                {
    524                    var34 = this.posX - var26;
    525                    var36 = this.posZ - var28;
    526                    var24 = (var34 * var14 + var36 * var16) * 2.0D;
    527                }
    528
    529                this.posX = var26 + var14 * var24;
    530                this.posZ = var28 + var16 * var24;
    531                this.setPosition(this.posX, this.posY + (double)this.yOffset, this.posZ);
    532
    533                moveMinecartOnRail(var45, var2, var47);
    534
    535                if (var13[0][1] != 0 && MathHelper.floor_double(this.posX) - var45 == var13[0][0] && MathHelper.floor_double(this.posZ) - var47 == var13[0][2])
    536                {
    537                    this.setPosition(this.posX, this.posY + (double)var13[0][1], this.posZ);
    538                }
    539                else if (var13[1][1] != 0 && MathHelper.floor_double(this.posX) - var45 == var13[1][0] && MathHelper.floor_double(this.posZ) - var47 == var13[1][2])
    540                {
    541                    this.setPosition(this.posX, this.posY + (double)var13[1][1], this.posZ);
    542                }
    543
    544                applyDragAndPushForces();
    545
    546                Vec3 var54 = this.func_70489_a(this.posX, this.posY, this.posZ);
    547
    548                if (var54 != null && var9 != null)
    549                {
    550                    double var39 = (var9.yCoord - var54.yCoord) * 0.05D;
    551                    var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
    552
    553                    if (var22 > 0.0D)
    554                    {
    555                        this.motionX = this.motionX / var22 * (var22 + var39);
    556                        this.motionZ = this.motionZ / var22 * (var22 + var39);
    557                    }
    558
    559                    this.setPosition(this.posX, var54.yCoord, this.posZ);
    560                }
    561
    562                int var53 = MathHelper.floor_double(this.posX);
    563                int var55 = MathHelper.floor_double(this.posZ);
    564
    565                if (var53 != var45 || var55 != var47)
    566                {
    567                    var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
    568                    this.motionX = var22 * (double)(var53 - var45);
    569                    this.motionZ = var22 * (double)(var55 - var47);
    570                }
    571
    572                double var41;
    573
    574                updatePushForces();
    575
    576                if(shouldDoRailFunctions())
    577                {
    578                    ((BlockRail)Block.blocksList[var8]).onMinecartPass(worldObj, this, var45, var2, var47);
    579                }
    580
    581                if (var11 && shouldDoRailFunctions())
    582                {
    583                    var41 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
    584
    585                    if (var41 > 0.01D)
    586                    {
    587                        double var43 = 0.06D;
    588                        this.motionX += this.motionX / var41 * var43;
    589                        this.motionZ += this.motionZ / var41 * var43;
    590                    }
    591                    else if (var10 == 1)
    592                    {
    593                        if (this.worldObj.isBlockNormalCube(var45 - 1, var2, var47))
    594                        {
    595                            this.motionX = 0.02D;
    596                        }
    597                        else if (this.worldObj.isBlockNormalCube(var45 + 1, var2, var47))
    598                        {
    599                            this.motionX = -0.02D;
    600                        }
    601                    }
    602                    else if (var10 == 0)
    603                    {
    604                        if (this.worldObj.isBlockNormalCube(var45, var2, var47 - 1))
    605                        {
    606                            this.motionZ = 0.02D;
    607                        }
    608                        else if (this.worldObj.isBlockNormalCube(var45, var2, var47 + 1))
    609                        {
    610                            this.motionZ = -0.02D;
    611                        }
    612                    }
    613                }
    614            }
    615            else
    616            {
    617                moveMinecartOffRail(var45, var2, var47);
    618            }
    619
    620            this.doBlockCollisions();
    621            this.rotationPitch = 0.0F;
    622            double var49 = this.prevPosX - this.posX;
    623            double var50 = this.prevPosZ - this.posZ;
    624
    625            if (var49 * var49 + var50 * var50 > 0.001D)
    626            {
    627                this.rotationYaw = (float)(Math.atan2(var50, var49) * 180.0D / Math.PI);
    628
    629                if (this.isInReverse)
    630                {
    631                    this.rotationYaw += 180.0F;
    632                }
    633            }
    634
    635            double var51 = (double)MathHelper.wrapAngleTo180_float(this.rotationYaw - this.prevRotationYaw);
    636
    637            if (var51 < -170.0D || var51 >= 170.0D)
    638            {
    639                this.rotationYaw += 180.0F;
    640                this.isInReverse = !this.isInReverse;
    641            }
    642
    643            this.setRotation(this.rotationYaw, this.rotationPitch);
    644
    645            AxisAlignedBB box = null;
    646            if (getCollisionHandler() != null)
    647            {
    648                box = getCollisionHandler().getMinecartCollisionBox(this);
    649            }
    650            else
    651            {
    652                box = boundingBox.expand(0.2D, 0.0D, 0.2D);
    653            }
    654
    655            List var15 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, box);
    656
    657            if (var15 != null && !var15.isEmpty())
    658            {
    659                for (int var52 = 0; var52 < var15.size(); ++var52)
    660                {
    661                    Entity var17 = (Entity)var15.get(var52);
    662
    663                    if (var17 != this.riddenByEntity && var17.canBePushed() && var17 instanceof EntityMinecart)
    664                    {
    665                        var17.applyEntityCollision(this);
    666                    }
    667                }
    668            }
    669
    670            if (this.riddenByEntity != null && this.riddenByEntity.isDead)
    671            {
    672                if (this.riddenByEntity.ridingEntity == this)
    673                {
    674                    this.riddenByEntity.ridingEntity = null;
    675                }
    676
    677                this.riddenByEntity = null;
    678            }
    679
    680            updateFuel();
    681            MinecraftForge.EVENT_BUS.post(new MinecartUpdateEvent(this, var45, var2, var47));
    682        }
    683    }
    684
    685    @SideOnly(Side.CLIENT)
    686    public Vec3 func_70495_a(double par1, double par3, double par5, double par7)
    687    {
    688        int var9 = MathHelper.floor_double(par1);
    689        int var10 = MathHelper.floor_double(par3);
    690        int var11 = MathHelper.floor_double(par5);
    691
    692        if (BlockRail.isRailBlockAt(this.worldObj, var9, var10 - 1, var11))
    693        {
    694            --var10;
    695        }
    696
    697        int var12 = this.worldObj.getBlockId(var9, var10, var11);
    698
    699        if (!BlockRail.isRailBlock(var12))
    700        {
    701            return null;
    702        }
    703        else
    704        {
    705            int var13 = ((BlockRail)Block.blocksList[var12]).getBasicRailMetadata(worldObj, this, var9, var10, var11);
    706
    707            par3 = (double)var10;
    708
    709            if (var13 >= 2 && var13 <= 5)
    710            {
    711                par3 = (double)(var10 + 1);
    712            }
    713
    714            int[][] var14 = matrix[var13];
    715            double var15 = (double)(var14[1][0] - var14[0][0]);
    716            double var17 = (double)(var14[1][2] - var14[0][2]);
    717            double var19 = Math.sqrt(var15 * var15 + var17 * var17);
    718            var15 /= var19;
    719            var17 /= var19;
    720            par1 += var15 * par7;
    721            par5 += var17 * par7;
    722
    723            if (var14[0][1] != 0 && MathHelper.floor_double(par1) - var9 == var14[0][0] && MathHelper.floor_double(par5) - var11 == var14[0][2])
    724            {
    725                par3 += (double)var14[0][1];
    726            }
    727            else if (var14[1][1] != 0 && MathHelper.floor_double(par1) - var9 == var14[1][0] && MathHelper.floor_double(par5) - var11 == var14[1][2])
    728            {
    729                par3 += (double)var14[1][1];
    730            }
    731
    732            return this.func_70489_a(par1, par3, par5);
    733        }
    734    }
    735
    736    public Vec3 func_70489_a(double par1, double par3, double par5)
    737    {
    738        int var7 = MathHelper.floor_double(par1);
    739        int var8 = MathHelper.floor_double(par3);
    740        int var9 = MathHelper.floor_double(par5);
    741
    742        if (BlockRail.isRailBlockAt(this.worldObj, var7, var8 - 1, var9))
    743        {
    744            --var8;
    745        }
    746
    747        int var10 = this.worldObj.getBlockId(var7, var8, var9);
    748
    749        if (BlockRail.isRailBlock(var10))
    750        {
    751            int var11 = ((BlockRail)Block.blocksList[var10]).getBasicRailMetadata(worldObj, this, var7, var8, var9);
    752            par3 = (double)var8;
    753
    754            if (var11 >= 2 && var11 <= 5)
    755            {
    756                par3 = (double)(var8 + 1);
    757            }
    758
    759            int[][] var12 = matrix[var11];
    760            double var13 = 0.0D;
    761            double var15 = (double)var7 + 0.5D + (double)var12[0][0] * 0.5D;
    762            double var17 = (double)var8 + 0.5D + (double)var12[0][1] * 0.5D;
    763            double var19 = (double)var9 + 0.5D + (double)var12[0][2] * 0.5D;
    764            double var21 = (double)var7 + 0.5D + (double)var12[1][0] * 0.5D;
    765            double var23 = (double)var8 + 0.5D + (double)var12[1][1] * 0.5D;
    766            double var25 = (double)var9 + 0.5D + (double)var12[1][2] * 0.5D;
    767            double var27 = var21 - var15;
    768            double var29 = (var23 - var17) * 2.0D;
    769            double var31 = var25 - var19;
    770
    771            if (var27 == 0.0D)
    772            {
    773                par1 = (double)var7 + 0.5D;
    774                var13 = par5 - (double)var9;
    775            }
    776            else if (var31 == 0.0D)
    777            {
    778                par5 = (double)var9 + 0.5D;
    779                var13 = par1 - (double)var7;
    780            }
    781            else
    782            {
    783                double var33 = par1 - var15;
    784                double var35 = par5 - var19;
    785                var13 = (var33 * var27 + var35 * var31) * 2.0D;
    786            }
    787
    788            par1 = var15 + var27 * var13;
    789            par3 = var17 + var29 * var13;
    790            par5 = var19 + var31 * var13;
    791
    792            if (var29 < 0.0D)
    793            {
    794                ++par3;
    795            }
    796
    797            if (var29 > 0.0D)
    798            {
    799                par3 += 0.5D;
    800            }
    801
    802            return this.worldObj.getWorldVec3Pool().getVecFromPool(par1, par3, par5);
    803        }
    804        else
    805        {
    806            return null;
    807        }
    808    }
    809
    810    /**
    811     * (abstract) Protected helper method to write subclass entity data to NBT.
    812     */
    813    protected void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
    814    {
    815        par1NBTTagCompound.setInteger("Type", this.minecartType);
    816
    817        if (isPoweredCart())
    818        {
    819            par1NBTTagCompound.setDouble("PushX", this.pushX);
    820            par1NBTTagCompound.setDouble("PushZ", this.pushZ);
    821            par1NBTTagCompound.setInteger("Fuel", this.fuel);
    822        }
    823
    824        if (getSizeInventory() > 0)
    825        {
    826            NBTTagList var2 = new NBTTagList();
    827
    828            for (int var3 = 0; var3 < this.cargoItems.length; ++var3)
    829            {
    830                if (this.cargoItems[var3] != null)
    831                {
    832                    NBTTagCompound var4 = new NBTTagCompound();
    833                    var4.setByte("Slot", (byte)var3);
    834                    this.cargoItems[var3].writeToNBT(var4);
    835                    var2.appendTag(var4);
    836                }
    837            }
    838
    839            par1NBTTagCompound.setTag("Items", var2);
    840        }
    841    }
    842
    843    /**
    844     * (abstract) Protected helper method to read subclass entity data from NBT.
    845     */
    846    protected void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
    847    {
    848        this.minecartType = par1NBTTagCompound.getInteger("Type");
    849
    850        if (isPoweredCart())
    851        {
    852            this.pushX = par1NBTTagCompound.getDouble("PushX");
    853            this.pushZ = par1NBTTagCompound.getDouble("PushZ");
    854            try
    855            {
    856                this.fuel = par1NBTTagCompound.getInteger("Fuel");
    857            }
    858            catch (ClassCastException e)
    859            {
    860                this.fuel = par1NBTTagCompound.getShort("Fuel");
    861            }
    862        }
    863
    864        if (getSizeInventory() > 0)
    865        {
    866            NBTTagList var2 = par1NBTTagCompound.getTagList("Items");
    867            this.cargoItems = new ItemStack[this.getSizeInventory()];
    868
    869            for (int var3 = 0; var3 < var2.tagCount(); ++var3)
    870            {
    871                NBTTagCompound var4 = (NBTTagCompound)var2.tagAt(var3);
    872                int var5 = var4.getByte("Slot") & 255;
    873
    874                if (var5 >= 0 && var5 < this.cargoItems.length)
    875                {
    876                    this.cargoItems[var5] = ItemStack.loadItemStackFromNBT(var4);
    877                }
    878            }
    879        }
    880    }
    881
    882    @SideOnly(Side.CLIENT)
    883    public float getShadowSize()
    884    {
    885        return 0.0F;
    886    }
    887
    888    /**
    889     * Applies a velocity to each of the entities pushing them away from each other. Args: entity
    890     */
    891    public void applyEntityCollision(Entity par1Entity)
    892    {
    893        MinecraftForge.EVENT_BUS.post(new MinecartCollisionEvent(this, par1Entity));
    894        if (getCollisionHandler() != null)
    895        {
    896            getCollisionHandler().onEntityCollision(this, par1Entity);
    897            return;
    898        }
    899        if (!this.worldObj.isRemote)
    900        {
    901            if (par1Entity != this.riddenByEntity)
    902            {
    903                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)
    904                {
    905                    par1Entity.mountEntity(this);
    906                }
    907
    908                double var2 = par1Entity.posX - this.posX;
    909                double var4 = par1Entity.posZ - this.posZ;
    910                double var6 = var2 * var2 + var4 * var4;
    911
    912                if (var6 >= 9.999999747378752E-5D)
    913                {
    914                    var6 = (double)MathHelper.sqrt_double(var6);
    915                    var2 /= var6;
    916                    var4 /= var6;
    917                    double var8 = 1.0D / var6;
    918
    919                    if (var8 > 1.0D)
    920                    {
    921                        var8 = 1.0D;
    922                    }
    923
    924                    var2 *= var8;
    925                    var4 *= var8;
    926                    var2 *= 0.10000000149011612D;
    927                    var4 *= 0.10000000149011612D;
    928                    var2 *= (double)(1.0F - this.entityCollisionReduction);
    929                    var4 *= (double)(1.0F - this.entityCollisionReduction);
    930                    var2 *= 0.5D;
    931                    var4 *= 0.5D;
    932
    933                    if (par1Entity instanceof EntityMinecart)
    934                    {
    935                        double var10 = par1Entity.posX - this.posX;
    936                        double var12 = par1Entity.posZ - this.posZ;
    937                        Vec3 var14 = this.worldObj.getWorldVec3Pool().getVecFromPool(var10, 0.0D, var12).normalize();
    938                        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();
    939                        double var16 = Math.abs(var14.dotProduct(var15));
    940
    941                        if (var16 < 0.800000011920929D)
    942                        {
    943                            return;
    944                        }
    945
    946                        double var18 = par1Entity.motionX + this.motionX;
    947                        double var20 = par1Entity.motionZ + this.motionZ;
    948
    949                        if (((EntityMinecart)par1Entity).isPoweredCart() && !isPoweredCart())
    950                        {
    951                            this.motionX *= 0.20000000298023224D;
    952                            this.motionZ *= 0.20000000298023224D;
    953                            this.addVelocity(par1Entity.motionX - var2, 0.0D, par1Entity.motionZ - var4);
    954                            par1Entity.motionX *= 0.949999988079071D;
    955                            par1Entity.motionZ *= 0.949999988079071D;
    956                        }
    957                        else if (!((EntityMinecart)par1Entity).isPoweredCart() && isPoweredCart())
    958                        {
    959                            par1Entity.motionX *= 0.20000000298023224D;
    960                            par1Entity.motionZ *= 0.20000000298023224D;
    961                            par1Entity.addVelocity(this.motionX + var2, 0.0D, this.motionZ + var4);
    962                            this.motionX *= 0.949999988079071D;
    963                            this.motionZ *= 0.949999988079071D;
    964                        }
    965                        else
    966                        {
    967                            var18 /= 2.0D;
    968                            var20 /= 2.0D;
    969                            this.motionX *= 0.20000000298023224D;
    970                            this.motionZ *= 0.20000000298023224D;
    971                            this.addVelocity(var18 - var2, 0.0D, var20 - var4);
    972                            par1Entity.motionX *= 0.20000000298023224D;
    973                            par1Entity.motionZ *= 0.20000000298023224D;
    974                            par1Entity.addVelocity(var18 + var2, 0.0D, var20 + var4);
    975                        }
    976                    }
    977                    else
    978                    {
    979                        this.addVelocity(-var2, 0.0D, -var4);
    980                        par1Entity.addVelocity(var2 / 4.0D, 0.0D, var4 / 4.0D);
    981                    }
    982                }
    983            }
    984        }
    985    }
    986
    987    /**
    988     * Returns the number of slots in the inventory.
    989     */
    990    public int getSizeInventory()
    991    {
    992        return (minecartType == 1 && getClass() == EntityMinecart.class ? 27 : 0);
    993    }
    994
    995    /**
    996     * Returns the stack in slot i
    997     */
    998    public ItemStack getStackInSlot(int par1)
    999    {
    1000        return this.cargoItems[par1];
    1001    }
    1002
    1003    /**
    1004     * Removes from an inventory slot (first arg) up to a specified number (second arg) of items and returns them in a
    1005     * new stack.
    1006     */
    1007    public ItemStack decrStackSize(int par1, int par2)
    1008    {
    1009        if (this.cargoItems[par1] != null)
    1010        {
    1011            ItemStack var3;
    1012
    1013            if (this.cargoItems[par1].stackSize <= par2)
    1014            {
    1015                var3 = this.cargoItems[par1];
    1016                this.cargoItems[par1] = null;
    1017                return var3;
    1018            }
    1019            else
    1020            {
    1021                var3 = this.cargoItems[par1].splitStack(par2);
    1022
    1023                if (this.cargoItems[par1].stackSize == 0)
    1024                {
    1025                    this.cargoItems[par1] = null;
    1026                }
    1027
    1028                return var3;
    1029            }
    1030        }
    1031        else
    1032        {
    1033            return null;
    1034        }
    1035    }
    1036
    1037    /**
    1038     * When some containers are closed they call this on each slot, then drop whatever it returns as an EntityItem -
    1039     * like when you close a workbench GUI.
    1040     */
    1041    public ItemStack getStackInSlotOnClosing(int par1)
    1042    {
    1043        if (this.cargoItems[par1] != null)
    1044        {
    1045            ItemStack var2 = this.cargoItems[par1];
    1046            this.cargoItems[par1] = null;
    1047            return var2;
    1048        }
    1049        else
    1050        {
    1051            return null;
    1052        }
    1053    }
    1054
    1055    /**
    1056     * Sets the given item stack to the specified slot in the inventory (can be crafting or armor sections).
    1057     */
    1058    public void setInventorySlotContents(int par1, ItemStack par2ItemStack)
    1059    {
    1060        this.cargoItems[par1] = par2ItemStack;
    1061
    1062        if (par2ItemStack != null && par2ItemStack.stackSize > this.getInventoryStackLimit())
    1063        {
    1064            par2ItemStack.stackSize = this.getInventoryStackLimit();
    1065        }
    1066    }
    1067
    1068    /**
    1069     * Returns the name of the inventory.
    1070     */
    1071    public String getInvName()
    1072    {
    1073        return "container.minecart";
    1074    }
    1075
    1076    /**
    1077     * Returns the maximum stack size for a inventory slot. Seems to always be 64, possibly will be extended. *Isn't
    1078     * this more of a set than a get?*
    1079     */
    1080    public int getInventoryStackLimit()
    1081    {
    1082        return 64;
    1083    }
    1084
    1085    /**
    1086     * Called when an the contents of an Inventory change, usually
    1087     */
    1088    public void onInventoryChanged() {}
    1089
    1090    /**
    1091     * Called when a player interacts with a mob. e.g. gets milk from a cow, gets into the saddle on a pig.
    1092     */
    1093    public boolean interact(EntityPlayer par1EntityPlayer)
    1094    {
    1095        if (MinecraftForge.EVENT_BUS.post(new MinecartInteractEvent(this, par1EntityPlayer)))
    1096        {
    1097            return true;
    1098        }
    1099
    1100        if (canBeRidden())
    1101        {
    1102            if (this.riddenByEntity != null && this.riddenByEntity instanceof EntityPlayer && this.riddenByEntity != par1EntityPlayer)
    1103            {
    1104                return true;
    1105            }
    1106
    1107            if (!this.worldObj.isRemote)
    1108            {
    1109                par1EntityPlayer.mountEntity(this);
    1110            }
    1111        }
    1112        else if (getSizeInventory() > 0)
    1113        {
    1114            if (!this.worldObj.isRemote)
    1115            {
    1116                par1EntityPlayer.displayGUIChest(this);
    1117            }
    1118        }
    1119        else if (this.minecartType == 2 && getClass() == EntityMinecart.class)
    1120        {
    1121            ItemStack var2 = par1EntityPlayer.inventory.getCurrentItem();
    1122
    1123            if (var2 != null && var2.itemID == Item.coal.itemID)
    1124            {
    1125                if (--var2.stackSize == 0)
    1126                {
    1127                    par1EntityPlayer.inventory.setInventorySlotContents(par1EntityPlayer.inventory.currentItem, (ItemStack)null);
    1128                }
    1129
    1130                this.fuel += 3600;
    1131            }
    1132
    1133            this.pushX = this.posX - par1EntityPlayer.posX;
    1134            this.pushZ = this.posZ - par1EntityPlayer.posZ;
    1135        }
    1136
    1137        return true;
    1138    }
    1139
    1140    @SideOnly(Side.CLIENT)
    1141
    1142    /**
    1143     * Sets the position and rotation. Only difference from the other one is no bounding on the rotation. Args: posX,
    1144     * posY, posZ, yaw, pitch
    1145     */
    1146    public void setPositionAndRotation2(double par1, double par3, double par5, float par7, float par8, int par9)
    1147    {
    1148        this.minecartX = par1;
    1149        this.minecartY = par3;
    1150        this.minecartZ = par5;
    1151        this.minecartYaw = (double)par7;
    1152        this.minecartPitch = (double)par8;
    1153        this.turnProgress = par9 + 2;
    1154        this.motionX = this.velocityX;
    1155        this.motionY = this.velocityY;
    1156        this.motionZ = this.velocityZ;
    1157    }
    1158
    1159    @SideOnly(Side.CLIENT)
    1160
    1161    /**
    1162     * Sets the velocity to the args. Args: x, y, z
    1163     */
    1164    public void setVelocity(double par1, double par3, double par5)
    1165    {
    1166        this.velocityX = this.motionX = par1;
    1167        this.velocityY = this.motionY = par3;
    1168        this.velocityZ = this.motionZ = par5;
    1169    }
    1170
    1171    /**
    1172     * Do not make give this method the name canInteractWith because it clashes with Container
    1173     */
    1174    public boolean isUseableByPlayer(EntityPlayer par1EntityPlayer)
    1175    {
    1176        return this.isDead ? false : par1EntityPlayer.getDistanceSqToEntity(this) <= 64.0D;
    1177    }
    1178
    1179    /**
    1180     * Is this minecart powered (Fuel > 0)
    1181     */
    1182    public boolean isMinecartPowered()
    1183    {
    1184        return (this.dataWatcher.getWatchableObjectByte(16) & 1) != 0;
    1185    }
    1186
    1187    /**
    1188     * Set if this minecart is powered (Fuel > 0)
    1189     */
    1190    protected void setMinecartPowered(boolean par1)
    1191    {
    1192        if (par1)
    1193        {
    1194            this.dataWatcher.updateObject(16, Byte.valueOf((byte)(this.dataWatcher.getWatchableObjectByte(16) | 1)));
    1195        }
    1196        else
    1197        {
    1198            this.dataWatcher.updateObject(16, Byte.valueOf((byte)(this.dataWatcher.getWatchableObjectByte(16) & -2)));
    1199        }
    1200    }
    1201
    1202    public void openChest() {}
    1203
    1204    public void closeChest() {}
    1205
    1206    /**
    1207     * Sets the current amount of damage the minecart has taken. Decreases over time. The cart breaks when this is over
    1208     * 40.
    1209     */
    1210    public void setDamage(int par1)
    1211    {
    1212        this.dataWatcher.updateObject(19, Integer.valueOf(par1));
    1213    }
    1214
    1215    /**
    1216     * Gets the current amount of damage the minecart has taken. Decreases over time. The cart breaks when this is over
    1217     * 40.
    1218     */
    1219    public int getDamage()
    1220    {
    1221        return this.dataWatcher.getWatchableObjectInt(19);
    1222    }
    1223
    1224    /**
    1225     * Sets the rolling amplitude the cart rolls while being attacked.
    1226     */
    1227    public void setRollingAmplitude(int par1)
    1228    {
    1229        this.dataWatcher.updateObject(17, Integer.valueOf(par1));
    1230    }
    1231
    1232    /**
    1233     * Gets the rolling amplitude the cart rolls while being attacked.
    1234     */
    1235    public int getRollingAmplitude()
    1236    {
    1237        return this.dataWatcher.getWatchableObjectInt(17);
    1238    }
    1239
    1240    /**
    1241     * Sets the rolling direction the cart rolls while being attacked. Can be 1 or -1.
    1242     */
    1243    public void setRollingDirection(int par1)
    1244    {
    1245        this.dataWatcher.updateObject(18, Integer.valueOf(par1));
    1246    }
    1247
    1248    /**
    1249     * Gets the rolling direction the cart rolls while being attacked. Can be 1 or -1.
    1250     */
    1251    public int getRollingDirection()
    1252    {
    1253        return this.dataWatcher.getWatchableObjectInt(18);
    1254    }
    1255
    1256    /**
    1257     * Drops the cart as a item. The exact item dropped is defined by getItemDropped().
    1258     */
    1259    public void dropCartAsItem()
    1260    {
    1261        for(ItemStack item : getItemsDropped())
    1262        {
    1263            entityDropItem(item, 0);
    1264        }
    1265    }
    1266
    1267    /**
    1268     * Override this to define which items your cart drops when broken.
    1269     * This does not include items contained in the inventory,
    1270     * that is handled elsewhere.
    1271     * @return A list of items dropped.
    1272     */
    1273    public List<ItemStack> getItemsDropped()
    1274    {
    1275        List<ItemStack> items = new ArrayList<ItemStack>();
    1276        items.add(new ItemStack(Item.minecartEmpty));
    1277
    1278        switch(minecartType)
    1279        {
    1280            case 1:
    1281                items.add(new ItemStack(Block.chest));
    1282                break;
    1283            case 2:
    1284                items.add(new ItemStack(Block.stoneOvenIdle));
    1285                break;
    1286        }
    1287        return items;
    1288    }
    1289
    1290    /**
    1291     * This function returns an ItemStack that represents this cart.
    1292     * This should be an ItemStack that can be used by the player to place the cart.
    1293     * This is the item that was registered with the cart via the registerMinecart function,
    1294     * but is not necessary the item the cart drops when destroyed.
    1295     * @return An ItemStack that can be used to place the cart.
    1296     */
    1297    public ItemStack getCartItem()
    1298    {
    1299        return MinecartRegistry.getItemForCart(this);
    1300    }
    1301
    1302    /**
    1303     * Returns true if this cart is self propelled.
    1304     * @return True if powered.
    1305     */
    1306    public boolean isPoweredCart()
    1307    {
    1308        return minecartType == 2 && getClass() == EntityMinecart.class;
    1309    }
    1310
    1311    /**
    1312     * Returns true if this cart is a storage cart
    1313     * Some carts may have inventories but not be storage carts
    1314     * and some carts without inventories may be storage carts.
    1315     * @return True if this cart should be classified as a storage cart.
    1316     */
    1317    public boolean isStorageCart()
    1318    {
    1319        return minecartType == 1 && getClass() == EntityMinecart.class;
    1320    }
    1321
    1322    /**
    1323     * Returns true if this cart can be ridden by an Entity.
    1324     * @return True if this cart can be ridden.
    1325     */
    1326    public boolean canBeRidden()
    1327    {
    1328        if(minecartType == 0 && getClass() == EntityMinecart.class)
    1329        {
    1330            return true;
    1331        }
    1332        return false;
    1333    }
    1334
    1335    /**
    1336     * Returns true if this cart can currently use rails.
    1337     * This function is mainly used to gracefully detach a minecart from a rail.
    1338     * @return True if the minecart can use rails.
    1339     */
    1340    public boolean canUseRail()
    1341    {
    1342        return canUseRail;
    1343    }
    1344
    1345    /**
    1346     * Set whether the minecart can use rails.
    1347     * This function is mainly used to gracefully detach a minecart from a rail.
    1348     * @param use Whether the minecart can currently use rails.
    1349     */
    1350    public void setCanUseRail(boolean use)
    1351    {
    1352        canUseRail = use;
    1353    }
    1354
    1355    /**
    1356     * Return false if this cart should not call IRail.onMinecartPass() and should ignore Powered Rails.
    1357     * @return True if this cart should call IRail.onMinecartPass().
    1358     */
    1359    public boolean shouldDoRailFunctions()
    1360    {
    1361        return true;
    1362    }
    1363
    1364    /**
    1365     * Simply returns the minecartType variable.
    1366     * @return minecartType
    1367     */
    1368    public int getMinecartType()
    1369    {
    1370        return minecartType;
    1371    }
    1372
    1373    /**
    1374     * Gets the current global Minecart Collision handler if none
    1375     * is registered, returns null
    1376     * @return The collision handler or null
    1377     */
    1378    public static IMinecartCollisionHandler getCollisionHandler()
    1379    {
    1380        return collisionHandler;
    1381    }
    1382
    1383    /**
    1384     * Sets the global Minecart Collision handler, overwrites any
    1385     * that is currently set.
    1386     * @param handler The new handler
    1387     */
    1388    public static void setCollisionHandler(IMinecartCollisionHandler handler)
    1389    {
    1390        collisionHandler = handler;
    1391    }
    1392
    1393    /**
    1394     * Carts should return their drag factor here
    1395     * @return The drag rate.
    1396     */
    1397    protected double getDrag()
    1398    {
    1399        return riddenByEntity != null ? defaultDragRidden : defaultDragEmpty;
    1400    }
    1401
    1402    /**
    1403     * Moved to allow overrides.
    1404     * This code applies drag and updates push forces.
    1405     */
    1406    protected void applyDragAndPushForces()
    1407    {
    1408        if(isPoweredCart())
    1409        {
    1410            double d27 = MathHelper.sqrt_double(pushX * pushX + pushZ * pushZ);
    1411            if(d27 > 0.01D)
    1412            {
    1413                pushX /= d27;
    1414                pushZ /= d27;
    1415                double d29 = 0.04;
    1416                motionX *= 0.8D;
    1417                motionY *= 0.0D;
    1418                motionZ *= 0.8D;
    1419                motionX += pushX * d29;
    1420                motionZ += pushZ * d29;
    1421            }
    1422            else
    1423            {
    1424                motionX *= 0.9D;
    1425                motionY *= 0.0D;
    1426                motionZ *= 0.9D;
    1427            }
    1428        }
    1429        motionX *= getDrag();
    1430        motionY *= 0.0D;
    1431        motionZ *= getDrag();
    1432    }
    1433
    1434    /**
    1435     * Moved to allow overrides.
    1436     * This code updates push forces.
    1437     */
    1438    protected void updatePushForces()
    1439    {
    1440        if(isPoweredCart())
    1441        {
    1442            double push = MathHelper.sqrt_double(pushX * pushX + pushZ * pushZ);
    1443            if(push > 0.01D && motionX * motionX + motionZ * motionZ > 0.001D)
    1444            {
    1445                pushX /= push;
    1446                pushZ /= push;
    1447                if(pushX * motionX + pushZ * motionZ < 0.0D)
    1448                {
    1449                    pushX = 0.0D;
    1450                    pushZ = 0.0D;
    1451                }
    1452                else
    1453                {
    1454                    pushX = motionX;
    1455                    pushZ = motionZ;
    1456                }
    1457            }
    1458        }
    1459    }
    1460
    1461    /**
    1462     * Moved to allow overrides.
    1463     * This code handles minecart movement and speed capping when on a rail.
    1464     */
    1465    protected void moveMinecartOnRail(int i, int j, int k)
    1466    {
    1467        int id = worldObj.getBlockId(i, j, k);
    1468        if (!BlockRail.isRailBlock(id))
    1469        {
    1470                return;
    1471        }
    1472        float railMaxSpeed = ((BlockRail)Block.blocksList[id]).getRailMaxSpeed(worldObj, this, i, j, k);
    1473
    1474        double maxSpeed = Math.min(railMaxSpeed, getMaxSpeedRail());
    1475        double mX = motionX;
    1476        double mZ = motionZ;
    1477        if(riddenByEntity != null)
    1478        {
    1479            mX *= 0.75D;
    1480            mZ *= 0.75D;
    1481        }
    1482        if(mX < -maxSpeed) mX = -maxSpeed;
    1483        if(mX >  maxSpeed) mX =  maxSpeed;
    1484        if(mZ < -maxSpeed) mZ = -maxSpeed;
    1485        if(mZ >  maxSpeed) mZ =  maxSpeed;
    1486        moveEntity(mX, 0.0D, mZ);
    1487    }
    1488
    1489    /**
    1490     * Moved to allow overrides.
    1491     * This code handles minecart movement and speed capping when not on a rail.
    1492     */
    1493    protected void moveMinecartOffRail(int i, int j, int k)
    1494    {
    1495        double d2 = getMaxSpeedGround();
    1496        if(!onGround)
    1497        {
    1498            d2 = getMaxSpeedAirLateral();
    1499        }
    1500        if(motionX < -d2) motionX = -d2;
    1501        if(motionX >  d2) motionX =  d2;
    1502        if(motionZ < -d2) motionZ = -d2;
    1503        if(motionZ >  d2) motionZ =  d2;
    1504        double moveY = motionY;
    1505        if(getMaxSpeedAirVertical() > 0 && motionY > getMaxSpeedAirVertical())
    1506        {
    1507            moveY = getMaxSpeedAirVertical();
    1508            if(Math.abs(motionX) < 0.3f && Math.abs(motionZ) < 0.3f)
    1509            {
    1510                moveY = 0.15f;
    1511                motionY = moveY;
    1512            }
    1513        }
    1514        if(onGround)
    1515        {
    1516            motionX *= 0.5D;
    1517            motionY *= 0.5D;
    1518            motionZ *= 0.5D;
    1519        }
    1520        moveEntity(motionX, moveY, motionZ);
    1521        if(!onGround)
    1522        {
    1523            motionX *= getDragAir();
    1524            motionY *= getDragAir();
    1525            motionZ *= getDragAir();
    1526        }
    1527    }
    1528
    1529    /**
    1530     * Moved to allow overrides.
    1531     * This code applies fuel consumption.
    1532     */
    1533    protected void updateFuel()
    1534    {
    1535        if (fuel > 0) fuel--;
    1536        if (fuel <= 0) pushX = pushZ = 0.0D;
    1537        setMinecartPowered(fuel > 0);
    1538    }
    1539
    1540    /**
    1541     * Moved to allow overrides, This code handle slopes affecting velocity.
    1542     * @param metadata The blocks position metadata
    1543     */
    1544    protected void adjustSlopeVelocities(int metadata)
    1545    {
    1546        double acceleration = 0.0078125D;
    1547        if (metadata == 2)
    1548        {
    1549            motionX -= acceleration;
    1550        }
    1551        else if (metadata == 3)
    1552        {
    1553            motionX += acceleration;
    1554        }
    1555        else if (metadata == 4)
    1556        {
    1557            motionZ += acceleration;
    1558        }
    1559        else if (metadata == 5)
    1560        {
    1561            motionZ -= acceleration;
    1562        }
    1563    }
    1564
    1565    /**
    1566     * Getters/setters for physics variables
    1567     */
    1568
    1569    /**
    1570     * Returns the carts max speed.
    1571     * Carts going faster than 1.1 cause issues with chunk loading.
    1572     * Carts cant traverse slopes or corners at greater than 0.5 - 0.6.
    1573     * This value is compared with the rails max speed to determine
    1574     * the carts current max speed. A normal rails max speed is 0.4.
    1575     * @return Carts max speed.
    1576     */
    1577    public float getMaxSpeedRail()
    1578    {
    1579        return maxSpeedRail;
    1580    }
    1581
    1582    public void setMaxSpeedRail(float value)
    1583    {
    1584        maxSpeedRail = value;
    1585    }
    1586
    1587    public float getMaxSpeedGround()
    1588    {
    1589        return maxSpeedGround;
    1590    }
    1591
    1592    public void setMaxSpeedGround(float value)
    1593    {
    1594        maxSpeedGround = value;
    1595    }
    1596
    1597    public float getMaxSpeedAirLateral()
    1598    {
    1599        return maxSpeedAirLateral;
    1600    }
    1601
    1602    public void setMaxSpeedAirLateral(float value)
    1603    {
    1604        maxSpeedAirLateral = value;
    1605    }
    1606
    1607    public float getMaxSpeedAirVertical()
    1608    {
    1609        return maxSpeedAirVertical;
    1610    }
    1611
    1612    public void setMaxSpeedAirVertical(float value)
    1613    {
    1614        maxSpeedAirVertical = value;
    1615    }
    1616
    1617    public double getDragAir()
    1618    {
    1619        return dragAir;
    1620    }
    1621
    1622    public void setDragAir(double value)
    1623    {
    1624        dragAir = value;
    1625    }
    1626}