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