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}