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        public void travelToTheEnd(int par1)
268        {
269            this.field_82345_h = false;
270            super.travelToTheEnd(par1);
271        }
272    
273        /**
274         * Called to update the entity's position/logic.
275         */
276        public void onUpdate()
277        {
278            if (this.field_82344_g != null)
279            {
280                this.field_82344_g.update();
281            }
282    
283            if (this.func_70496_j() > 0)
284            {
285                this.func_70497_h(this.func_70496_j() - 1);
286            }
287    
288            if (this.getDamage() > 0)
289            {
290                this.setDamage(this.getDamage() - 1);
291            }
292    
293            if (this.posY < -64.0D)
294            {
295                this.kill();
296            }
297    
298            if (this.isMinecartPowered() && this.rand.nextInt(4) == 0 && minecartType == 2 && getClass() == EntityMinecart.class)
299            {
300                this.worldObj.spawnParticle("largesmoke", this.posX, this.posY + 0.8D, this.posZ, 0.0D, 0.0D, 0.0D);
301            }
302    
303            if (this.worldObj.isRemote)
304            {
305                if (this.turnProgress > 0)
306                {
307                    double var45 = this.posX + (this.minecartX - this.posX) / (double)this.turnProgress;
308                    double var46 = this.posY + (this.minecartY - this.posY) / (double)this.turnProgress;
309                    double var5 = this.posZ + (this.minecartZ - this.posZ) / (double)this.turnProgress;
310                    double var7 = MathHelper.wrapAngleTo180_double(this.minecartYaw - (double)this.rotationYaw);
311                    this.rotationYaw = (float)((double)this.rotationYaw + var7 / (double)this.turnProgress);
312                    this.rotationPitch = (float)((double)this.rotationPitch + (this.minecartPitch - (double)this.rotationPitch) / (double)this.turnProgress);
313                    --this.turnProgress;
314                    this.setPosition(var45, var46, var5);
315                    this.setRotation(this.rotationYaw, this.rotationPitch);
316                }
317                else
318                {
319                    this.setPosition(this.posX, this.posY, this.posZ);
320                    this.setRotation(this.rotationYaw, this.rotationPitch);
321                }
322            }
323            else
324            {
325                this.prevPosX = this.posX;
326                this.prevPosY = this.posY;
327                this.prevPosZ = this.posZ;
328                this.motionY -= 0.03999999910593033D;
329                int var1 = MathHelper.floor_double(this.posX);
330                int var2 = MathHelper.floor_double(this.posY);
331                int var3 = MathHelper.floor_double(this.posZ);
332    
333                if (BlockRail.isRailBlockAt(this.worldObj, var1, var2 - 1, var3))
334                {
335                    --var2;
336                }
337    
338                double var4 = 0.4D;
339                double var6 = 0.0078125D;
340                int var8 = this.worldObj.getBlockId(var1, var2, var3);
341    
342                if (canUseRail() && BlockRail.isRailBlock(var8))
343                {
344                    Vec3 var9 = this.func_70489_a(this.posX, this.posY, this.posZ);
345                    int var10 = ((BlockRail)Block.blocksList[var8]).getBasicRailMetadata(worldObj, this, var1, var2, var3);
346                    this.posY = (double)var2;
347                    boolean var11 = false;
348                    boolean var12 = false;
349    
350                    if (var8 == Block.railPowered.blockID)
351                    {
352                        var11 = (worldObj.getBlockMetadata(var1, var2, var3) & 8) != 0;
353                        var12 = !var11;
354                    }
355    
356                    if (((BlockRail)Block.blocksList[var8]).isPowered())
357                    {
358                        var10 &= 7;
359                    }
360    
361                    if (var10 >= 2 && var10 <= 5)
362                    {
363                        this.posY = (double)(var2 + 1);
364                    }
365    
366                    adjustSlopeVelocities(var10);
367    
368                    int[][] var13 = field_70500_g[var10];
369                    double var14 = (double)(var13[1][0] - var13[0][0]);
370                    double var16 = (double)(var13[1][2] - var13[0][2]);
371                    double var18 = Math.sqrt(var14 * var14 + var16 * var16);
372                    double var20 = this.motionX * var14 + this.motionZ * var16;
373    
374                    if (var20 < 0.0D)
375                    {
376                        var14 = -var14;
377                        var16 = -var16;
378                    }
379    
380                    double var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
381                    this.motionX = var22 * var14 / var18;
382                    this.motionZ = var22 * var16 / var18;
383                    double var24;
384                    double var26;
385    
386                    if (this.riddenByEntity != null)
387                    {
388                        var24 = this.riddenByEntity.motionX * this.riddenByEntity.motionX + this.riddenByEntity.motionZ * this.riddenByEntity.motionZ;
389                        var26 = this.motionX * this.motionX + this.motionZ * this.motionZ;
390    
391                        if (var24 > 1.0E-4D && var26 < 0.01D)
392                        {
393                            this.motionX += this.riddenByEntity.motionX * 0.1D;
394                            this.motionZ += this.riddenByEntity.motionZ * 0.1D;
395                            var12 = false;
396                        }
397                    }
398    
399                    if (var12 && shouldDoRailFunctions())
400                    {
401                        var24 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
402    
403                        if (var24 < 0.03D)
404                        {
405                            this.motionX *= 0.0D;
406                            this.motionY *= 0.0D;
407                            this.motionZ *= 0.0D;
408                        }
409                        else
410                        {
411                            this.motionX *= 0.5D;
412                            this.motionY *= 0.0D;
413                            this.motionZ *= 0.5D;
414                        }
415                    }
416    
417                    var24 = 0.0D;
418                    var26 = (double)var1 + 0.5D + (double)var13[0][0] * 0.5D;
419                    double var28 = (double)var3 + 0.5D + (double)var13[0][2] * 0.5D;
420                    double var30 = (double)var1 + 0.5D + (double)var13[1][0] * 0.5D;
421                    double var32 = (double)var3 + 0.5D + (double)var13[1][2] * 0.5D;
422                    var14 = var30 - var26;
423                    var16 = var32 - var28;
424                    double var34;
425                    double var36;
426    
427                    if (var14 == 0.0D)
428                    {
429                        this.posX = (double)var1 + 0.5D;
430                        var24 = this.posZ - (double)var3;
431                    }
432                    else if (var16 == 0.0D)
433                    {
434                        this.posZ = (double)var3 + 0.5D;
435                        var24 = this.posX - (double)var1;
436                    }
437                    else
438                    {
439                        var34 = this.posX - var26;
440                        var36 = this.posZ - var28;
441                        var24 = (var34 * var14 + var36 * var16) * 2.0D;
442                    }
443    
444                    this.posX = var26 + var14 * var24;
445                    this.posZ = var28 + var16 * var24;
446                    this.setPosition(this.posX, this.posY + (double)this.yOffset, this.posZ);
447    
448                    moveMinecartOnRail(var1, var2, var3);
449    
450                    if (var13[0][1] != 0 && MathHelper.floor_double(this.posX) - var1 == var13[0][0] && MathHelper.floor_double(this.posZ) - var3 == var13[0][2])
451                    {
452                        this.setPosition(this.posX, this.posY + (double)var13[0][1], this.posZ);
453                    }
454                    else if (var13[1][1] != 0 && MathHelper.floor_double(this.posX) - var1 == var13[1][0] && MathHelper.floor_double(this.posZ) - var3 == var13[1][2])
455                    {
456                        this.setPosition(this.posX, this.posY + (double)var13[1][1], this.posZ);
457                    }
458    
459                    applyDragAndPushForces();
460    
461                    Vec3 var52 = this.func_70489_a(this.posX, this.posY, this.posZ);
462    
463                    if (var52 != null && var9 != null)
464                    {
465                        double var39 = (var9.yCoord - var52.yCoord) * 0.05D;
466                        var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
467    
468                        if (var22 > 0.0D)
469                        {
470                            this.motionX = this.motionX / var22 * (var22 + var39);
471                            this.motionZ = this.motionZ / var22 * (var22 + var39);
472                        }
473    
474                        this.setPosition(this.posX, var52.yCoord, this.posZ);
475                    }
476    
477                    int var51 = MathHelper.floor_double(this.posX);
478                    int var53 = MathHelper.floor_double(this.posZ);
479    
480                    if (var51 != var1 || var53 != var3)
481                    {
482                        var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
483                        this.motionX = var22 * (double)(var51 - var1);
484                        this.motionZ = var22 * (double)(var53 - var3);
485                    }
486    
487                    double var41;
488    
489                    updatePushForces();
490                    
491                    if(shouldDoRailFunctions())
492                    {
493                        ((BlockRail)Block.blocksList[var8]).onMinecartPass(worldObj, this, var1, var2, var3);
494                    }
495    
496                    if (var11 && shouldDoRailFunctions())
497                    {
498                        var41 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
499    
500                        if (var41 > 0.01D)
501                        {
502                            double var43 = 0.06D;
503                            this.motionX += this.motionX / var41 * var43;
504                            this.motionZ += this.motionZ / var41 * var43;
505                        }
506                        else if (var10 == 1)
507                        {
508                            if (this.worldObj.isBlockNormalCube(var1 - 1, var2, var3))
509                            {
510                                this.motionX = 0.02D;
511                            }
512                            else if (this.worldObj.isBlockNormalCube(var1 + 1, var2, var3))
513                            {
514                                this.motionX = -0.02D;
515                            }
516                        }
517                        else if (var10 == 0)
518                        {
519                            if (this.worldObj.isBlockNormalCube(var1, var2, var3 - 1))
520                            {
521                                this.motionZ = 0.02D;
522                            }
523                            else if (this.worldObj.isBlockNormalCube(var1, var2, var3 + 1))
524                            {
525                                this.motionZ = -0.02D;
526                            }
527                        }
528                    }
529                }
530                else
531                {
532                    moveMinecartOffRail(var1, var2, var3);
533                }
534    
535                this.doBlockCollisions();
536                this.rotationPitch = 0.0F;
537                double var47 = this.prevPosX - this.posX;
538                double var48 = this.prevPosZ - this.posZ;
539    
540                if (var47 * var47 + var48 * var48 > 0.001D)
541                {
542                    this.rotationYaw = (float)(Math.atan2(var48, var47) * 180.0D / Math.PI);
543    
544                    if (this.field_70499_f)
545                    {
546                        this.rotationYaw += 180.0F;
547                    }
548                }
549    
550                double var49 = (double)MathHelper.wrapAngleTo180_float(this.rotationYaw - this.prevRotationYaw);
551    
552                if (var49 < -170.0D || var49 >= 170.0D)
553                {
554                    this.rotationYaw += 180.0F;
555                    this.field_70499_f = !this.field_70499_f;
556                }
557    
558                this.setRotation(this.rotationYaw, this.rotationPitch);
559    
560                AxisAlignedBB box = null;
561                if (getCollisionHandler() != null)
562                {
563                    box = getCollisionHandler().getMinecartCollisionBox(this);
564                }
565                else
566                {
567                    box = boundingBox.expand(0.2D, 0.0D, 0.2D);
568                }
569    
570                List var15 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, box);
571    
572                if (var15 != null && !var15.isEmpty())
573                {
574                    for (int var50 = 0; var50 < var15.size(); ++var50)
575                    {
576                        Entity var17 = (Entity)var15.get(var50);
577    
578                        if (var17 != this.riddenByEntity && var17.canBePushed() && var17 instanceof EntityMinecart)
579                        {
580                            var17.applyEntityCollision(this);
581                        }
582                    }
583                }
584    
585                if (this.riddenByEntity != null && this.riddenByEntity.isDead)
586                {
587                    if (this.riddenByEntity.ridingEntity == this)
588                    {
589                        this.riddenByEntity.ridingEntity = null;
590                    }
591    
592                    this.riddenByEntity = null;
593                }
594    
595                updateFuel();
596                MinecraftForge.EVENT_BUS.post(new MinecartUpdateEvent(this, var1, var2, var3));
597            }
598        }
599    
600        @SideOnly(Side.CLIENT)
601        public Vec3 func_70495_a(double par1, double par3, double par5, double par7)
602        {
603            int var9 = MathHelper.floor_double(par1);
604            int var10 = MathHelper.floor_double(par3);
605            int var11 = MathHelper.floor_double(par5);
606    
607            if (BlockRail.isRailBlockAt(this.worldObj, var9, var10 - 1, var11))
608            {
609                --var10;
610            }
611    
612            int var12 = this.worldObj.getBlockId(var9, var10, var11);
613    
614            if (!BlockRail.isRailBlock(var12))
615            {
616                return null;
617            }
618            else
619            {
620                int var13 = ((BlockRail)Block.blocksList[var12]).getBasicRailMetadata(worldObj, this, var9, var10, var11);
621    
622                par3 = (double)var10;
623    
624                if (var13 >= 2 && var13 <= 5)
625                {
626                    par3 = (double)(var10 + 1);
627                }
628    
629                int[][] var14 = field_70500_g[var13];
630                double var15 = (double)(var14[1][0] - var14[0][0]);
631                double var17 = (double)(var14[1][2] - var14[0][2]);
632                double var19 = Math.sqrt(var15 * var15 + var17 * var17);
633                var15 /= var19;
634                var17 /= var19;
635                par1 += var15 * par7;
636                par5 += var17 * par7;
637    
638                if (var14[0][1] != 0 && MathHelper.floor_double(par1) - var9 == var14[0][0] && MathHelper.floor_double(par5) - var11 == var14[0][2])
639                {
640                    par3 += (double)var14[0][1];
641                }
642                else if (var14[1][1] != 0 && MathHelper.floor_double(par1) - var9 == var14[1][0] && MathHelper.floor_double(par5) - var11 == var14[1][2])
643                {
644                    par3 += (double)var14[1][1];
645                }
646    
647                return this.func_70489_a(par1, par3, par5);
648            }
649        }
650    
651        public Vec3 func_70489_a(double par1, double par3, double par5)
652        {
653            int var7 = MathHelper.floor_double(par1);
654            int var8 = MathHelper.floor_double(par3);
655            int var9 = MathHelper.floor_double(par5);
656    
657            if (BlockRail.isRailBlockAt(this.worldObj, var7, var8 - 1, var9))
658            {
659                --var8;
660            }
661    
662            int var10 = this.worldObj.getBlockId(var7, var8, var9);
663    
664            if (BlockRail.isRailBlock(var10))
665            {
666                int var11 = ((BlockRail)Block.blocksList[var10]).getBasicRailMetadata(worldObj, this, var7, var8, var9);
667                par3 = (double)var8;
668    
669                if (var11 >= 2 && var11 <= 5)
670                {
671                    par3 = (double)(var8 + 1);
672                }
673    
674                int[][] var12 = field_70500_g[var11];
675                double var13 = 0.0D;
676                double var15 = (double)var7 + 0.5D + (double)var12[0][0] * 0.5D;
677                double var17 = (double)var8 + 0.5D + (double)var12[0][1] * 0.5D;
678                double var19 = (double)var9 + 0.5D + (double)var12[0][2] * 0.5D;
679                double var21 = (double)var7 + 0.5D + (double)var12[1][0] * 0.5D;
680                double var23 = (double)var8 + 0.5D + (double)var12[1][1] * 0.5D;
681                double var25 = (double)var9 + 0.5D + (double)var12[1][2] * 0.5D;
682                double var27 = var21 - var15;
683                double var29 = (var23 - var17) * 2.0D;
684                double var31 = var25 - var19;
685    
686                if (var27 == 0.0D)
687                {
688                    par1 = (double)var7 + 0.5D;
689                    var13 = par5 - (double)var9;
690                }
691                else if (var31 == 0.0D)
692                {
693                    par5 = (double)var9 + 0.5D;
694                    var13 = par1 - (double)var7;
695                }
696                else
697                {
698                    double var33 = par1 - var15;
699                    double var35 = par5 - var19;
700                    var13 = (var33 * var27 + var35 * var31) * 2.0D;
701                }
702    
703                par1 = var15 + var27 * var13;
704                par3 = var17 + var29 * var13;
705                par5 = var19 + var31 * var13;
706    
707                if (var29 < 0.0D)
708                {
709                    ++par3;
710                }
711    
712                if (var29 > 0.0D)
713                {
714                    par3 += 0.5D;
715                }
716    
717                return this.worldObj.func_82732_R().getVecFromPool(par1, par3, par5);
718            }
719            else
720            {
721                return null;
722            }
723        }
724    
725        /**
726         * (abstract) Protected helper method to write subclass entity data to NBT.
727         */
728        protected void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
729        {
730            par1NBTTagCompound.setInteger("Type", this.minecartType);
731    
732            if (isPoweredCart())
733            {
734                par1NBTTagCompound.setDouble("PushX", this.pushX);
735                par1NBTTagCompound.setDouble("PushZ", this.pushZ);
736                par1NBTTagCompound.setInteger("Fuel", this.fuel);
737            }
738    
739            if (getSizeInventory() > 0)
740            {
741                NBTTagList var2 = new NBTTagList();
742    
743                for (int var3 = 0; var3 < this.cargoItems.length; ++var3)
744                {
745                    if (this.cargoItems[var3] != null)
746                    {
747                        NBTTagCompound var4 = new NBTTagCompound();
748                        var4.setByte("Slot", (byte)var3);
749                        this.cargoItems[var3].writeToNBT(var4);
750                        var2.appendTag(var4);
751                    }
752                }
753    
754                par1NBTTagCompound.setTag("Items", var2);
755            }
756        }
757    
758        /**
759         * (abstract) Protected helper method to read subclass entity data from NBT.
760         */
761        protected void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
762        {
763            this.minecartType = par1NBTTagCompound.getInteger("Type");
764    
765            if (isPoweredCart())
766            {
767                this.pushX = par1NBTTagCompound.getDouble("PushX");
768                this.pushZ = par1NBTTagCompound.getDouble("PushZ");
769                try
770                {
771                    this.fuel = par1NBTTagCompound.getInteger("Fuel");
772                }
773                catch (ClassCastException e)
774                {
775                    this.fuel = par1NBTTagCompound.getShort("Fuel");
776                }
777            }
778    
779            if (getSizeInventory() > 0)
780            {
781                NBTTagList var2 = par1NBTTagCompound.getTagList("Items");
782                this.cargoItems = new ItemStack[this.getSizeInventory()];
783    
784                for (int var3 = 0; var3 < var2.tagCount(); ++var3)
785                {
786                    NBTTagCompound var4 = (NBTTagCompound)var2.tagAt(var3);
787                    int var5 = var4.getByte("Slot") & 255;
788    
789                    if (var5 >= 0 && var5 < this.cargoItems.length)
790                    {
791                        this.cargoItems[var5] = ItemStack.loadItemStackFromNBT(var4);
792                    }
793                }
794            }
795        }
796    
797        @SideOnly(Side.CLIENT)
798        public float getShadowSize()
799        {
800            return 0.0F;
801        }
802    
803        /**
804         * Applies a velocity to each of the entities pushing them away from each other. Args: entity
805         */
806        public void applyEntityCollision(Entity par1Entity)
807        {
808            MinecraftForge.EVENT_BUS.post(new MinecartCollisionEvent(this, par1Entity));
809            if (getCollisionHandler() != null)
810            {
811                getCollisionHandler().onEntityCollision(this, par1Entity);
812                return;
813            }
814            if (!this.worldObj.isRemote)
815            {
816                if (par1Entity != this.riddenByEntity)
817                {
818                    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)
819                    {
820                        par1Entity.mountEntity(this);
821                    }
822    
823                    double var2 = par1Entity.posX - this.posX;
824                    double var4 = par1Entity.posZ - this.posZ;
825                    double var6 = var2 * var2 + var4 * var4;
826    
827                    if (var6 >= 9.999999747378752E-5D)
828                    {
829                        var6 = (double)MathHelper.sqrt_double(var6);
830                        var2 /= var6;
831                        var4 /= var6;
832                        double var8 = 1.0D / var6;
833    
834                        if (var8 > 1.0D)
835                        {
836                            var8 = 1.0D;
837                        }
838    
839                        var2 *= var8;
840                        var4 *= var8;
841                        var2 *= 0.10000000149011612D;
842                        var4 *= 0.10000000149011612D;
843                        var2 *= (double)(1.0F - this.entityCollisionReduction);
844                        var4 *= (double)(1.0F - this.entityCollisionReduction);
845                        var2 *= 0.5D;
846                        var4 *= 0.5D;
847    
848                        if (par1Entity instanceof EntityMinecart)
849                        {
850                            double var10 = par1Entity.posX - this.posX;
851                            double var12 = par1Entity.posZ - this.posZ;
852                            Vec3 var14 = this.worldObj.func_82732_R().getVecFromPool(var10, 0.0D, var12).normalize();
853                            Vec3 var15 = this.worldObj.func_82732_R().getVecFromPool((double)MathHelper.cos(this.rotationYaw * (float)Math.PI / 180.0F), 0.0D, (double)MathHelper.sin(this.rotationYaw * (float)Math.PI / 180.0F)).normalize();
854                            double var16 = Math.abs(var14.dotProduct(var15));
855    
856                            if (var16 < 0.800000011920929D)
857                            {
858                                return;
859                            }
860    
861                            double var18 = par1Entity.motionX + this.motionX;
862                            double var20 = par1Entity.motionZ + this.motionZ;
863    
864                            if (((EntityMinecart)par1Entity).isPoweredCart() && !isPoweredCart())
865                            {
866                                this.motionX *= 0.20000000298023224D;
867                                this.motionZ *= 0.20000000298023224D;
868                                this.addVelocity(par1Entity.motionX - var2, 0.0D, par1Entity.motionZ - var4);
869                                par1Entity.motionX *= 0.949999988079071D;
870                                par1Entity.motionZ *= 0.949999988079071D;
871                            }
872                            else if (!((EntityMinecart)par1Entity).isPoweredCart() && isPoweredCart())
873                            {
874                                par1Entity.motionX *= 0.20000000298023224D;
875                                par1Entity.motionZ *= 0.20000000298023224D;
876                                par1Entity.addVelocity(this.motionX + var2, 0.0D, this.motionZ + var4);
877                                this.motionX *= 0.949999988079071D;
878                                this.motionZ *= 0.949999988079071D;
879                            }
880                            else
881                            {
882                                var18 /= 2.0D;
883                                var20 /= 2.0D;
884                                this.motionX *= 0.20000000298023224D;
885                                this.motionZ *= 0.20000000298023224D;
886                                this.addVelocity(var18 - var2, 0.0D, var20 - var4);
887                                par1Entity.motionX *= 0.20000000298023224D;
888                                par1Entity.motionZ *= 0.20000000298023224D;
889                                par1Entity.addVelocity(var18 + var2, 0.0D, var20 + var4);
890                            }
891                        }
892                        else
893                        {
894                            this.addVelocity(-var2, 0.0D, -var4);
895                            par1Entity.addVelocity(var2 / 4.0D, 0.0D, var4 / 4.0D);
896                        }
897                    }
898                }
899            }
900        }
901    
902        /**
903         * Returns the number of slots in the inventory.
904         */
905        public int getSizeInventory()
906        {
907            return (minecartType == 1 && getClass() == EntityMinecart.class ? 27 : 0);
908        }
909    
910        /**
911         * Returns the stack in slot i
912         */
913        public ItemStack getStackInSlot(int par1)
914        {
915            return this.cargoItems[par1];
916        }
917    
918        /**
919         * Removes from an inventory slot (first arg) up to a specified number (second arg) of items and returns them in a
920         * new stack.
921         */
922        public ItemStack decrStackSize(int par1, int par2)
923        {
924            if (this.cargoItems[par1] != null)
925            {
926                ItemStack var3;
927    
928                if (this.cargoItems[par1].stackSize <= par2)
929                {
930                    var3 = this.cargoItems[par1];
931                    this.cargoItems[par1] = null;
932                    return var3;
933                }
934                else
935                {
936                    var3 = this.cargoItems[par1].splitStack(par2);
937    
938                    if (this.cargoItems[par1].stackSize == 0)
939                    {
940                        this.cargoItems[par1] = null;
941                    }
942    
943                    return var3;
944                }
945            }
946            else
947            {
948                return null;
949            }
950        }
951    
952        /**
953         * When some containers are closed they call this on each slot, then drop whatever it returns as an EntityItem -
954         * like when you close a workbench GUI.
955         */
956        public ItemStack getStackInSlotOnClosing(int par1)
957        {
958            if (this.cargoItems[par1] != null)
959            {
960                ItemStack var2 = this.cargoItems[par1];
961                this.cargoItems[par1] = null;
962                return var2;
963            }
964            else
965            {
966                return null;
967            }
968        }
969    
970        /**
971         * Sets the given item stack to the specified slot in the inventory (can be crafting or armor sections).
972         */
973        public void setInventorySlotContents(int par1, ItemStack par2ItemStack)
974        {
975            this.cargoItems[par1] = par2ItemStack;
976    
977            if (par2ItemStack != null && par2ItemStack.stackSize > this.getInventoryStackLimit())
978            {
979                par2ItemStack.stackSize = this.getInventoryStackLimit();
980            }
981        }
982    
983        /**
984         * Returns the name of the inventory.
985         */
986        public String getInvName()
987        {
988            return "container.minecart";
989        }
990    
991        /**
992         * Returns the maximum stack size for a inventory slot. Seems to always be 64, possibly will be extended. *Isn't
993         * this more of a set than a get?*
994         */
995        public int getInventoryStackLimit()
996        {
997            return 64;
998        }
999    
1000        /**
1001         * Called when an the contents of an Inventory change, usually
1002         */
1003        public void onInventoryChanged() {}
1004    
1005        /**
1006         * Called when a player interacts with a mob. e.g. gets milk from a cow, gets into the saddle on a pig.
1007         */
1008        public boolean interact(EntityPlayer par1EntityPlayer)
1009        {
1010            if (MinecraftForge.EVENT_BUS.post(new MinecartInteractEvent(this, par1EntityPlayer)))
1011            {
1012                return true;
1013            }
1014    
1015            if (canBeRidden())
1016            {
1017                if (this.riddenByEntity != null && this.riddenByEntity instanceof EntityPlayer && this.riddenByEntity != par1EntityPlayer)
1018                {
1019                    return true;
1020                }
1021    
1022                if (!this.worldObj.isRemote)
1023                {
1024                    par1EntityPlayer.mountEntity(this);
1025                }
1026            }
1027            else if (getSizeInventory() > 0)
1028            {
1029                if (!this.worldObj.isRemote)
1030                {
1031                    par1EntityPlayer.displayGUIChest(this);
1032                }
1033            }
1034            else if (this.minecartType == 2 && getClass() == EntityMinecart.class)
1035            {
1036                ItemStack var2 = par1EntityPlayer.inventory.getCurrentItem();
1037    
1038                if (var2 != null && var2.itemID == Item.coal.shiftedIndex)
1039                {
1040                    if (--var2.stackSize == 0)
1041                    {
1042                        par1EntityPlayer.inventory.setInventorySlotContents(par1EntityPlayer.inventory.currentItem, (ItemStack)null);
1043                    }
1044    
1045                    this.fuel += 3600;
1046                }
1047    
1048                this.pushX = this.posX - par1EntityPlayer.posX;
1049                this.pushZ = this.posZ - par1EntityPlayer.posZ;
1050            }
1051    
1052            return true;
1053        }
1054    
1055        @SideOnly(Side.CLIENT)
1056    
1057        /**
1058         * Sets the position and rotation. Only difference from the other one is no bounding on the rotation. Args: posX,
1059         * posY, posZ, yaw, pitch
1060         */
1061        public void setPositionAndRotation2(double par1, double par3, double par5, float par7, float par8, int par9)
1062        {
1063            this.minecartX = par1;
1064            this.minecartY = par3;
1065            this.minecartZ = par5;
1066            this.minecartYaw = (double)par7;
1067            this.minecartPitch = (double)par8;
1068            this.turnProgress = par9 + 2;
1069            this.motionX = this.velocityX;
1070            this.motionY = this.velocityY;
1071            this.motionZ = this.velocityZ;
1072        }
1073    
1074        /**
1075         * Do not make give this method the name canInteractWith because it clashes with Container
1076         */
1077        public boolean isUseableByPlayer(EntityPlayer par1EntityPlayer)
1078        {
1079            return this.isDead ? false : par1EntityPlayer.getDistanceSqToEntity(this) <= 64.0D;
1080        }
1081    
1082        @SideOnly(Side.CLIENT)
1083    
1084        /**
1085         * Sets the velocity to the args. Args: x, y, z
1086         */
1087        public void setVelocity(double par1, double par3, double par5)
1088        {
1089            this.velocityX = this.motionX = par1;
1090            this.velocityY = this.motionY = par3;
1091            this.velocityZ = this.motionZ = par5;
1092        }
1093    
1094        /**
1095         * Is this minecart powered (Fuel > 0)
1096         */
1097        public boolean isMinecartPowered()
1098        {
1099            return (this.dataWatcher.getWatchableObjectByte(16) & 1) != 0;
1100        }
1101    
1102        /**
1103         * Set if this minecart is powered (Fuel > 0)
1104         */
1105        protected void setMinecartPowered(boolean par1)
1106        {
1107            if (par1)
1108            {
1109                this.dataWatcher.updateObject(16, Byte.valueOf((byte)(this.dataWatcher.getWatchableObjectByte(16) | 1)));
1110            }
1111            else
1112            {
1113                this.dataWatcher.updateObject(16, Byte.valueOf((byte)(this.dataWatcher.getWatchableObjectByte(16) & -2)));
1114            }
1115        }
1116    
1117        public void openChest() {}
1118    
1119        public void closeChest() {}
1120    
1121        /**
1122         * Sets the current amount of damage the minecart has taken. Decreases over time. The cart breaks when this is over
1123         * 40.
1124         */
1125        public void setDamage(int par1)
1126        {
1127            this.dataWatcher.updateObject(19, Integer.valueOf(par1));
1128        }
1129    
1130        /**
1131         * Gets the current amount of damage the minecart has taken. Decreases over time. The cart breaks when this is over
1132         * 40.
1133         */
1134        public int getDamage()
1135        {
1136            return this.dataWatcher.getWatchableObjectInt(19);
1137        }
1138    
1139        public void func_70497_h(int par1)
1140        {
1141            this.dataWatcher.updateObject(17, Integer.valueOf(par1));
1142        }
1143    
1144        public int func_70496_j()
1145        {
1146            return this.dataWatcher.getWatchableObjectInt(17);
1147        }
1148    
1149        public void func_70494_i(int par1)
1150        {
1151            this.dataWatcher.updateObject(18, Integer.valueOf(par1));
1152        }
1153    
1154        public int func_70493_k()
1155        {
1156            return this.dataWatcher.getWatchableObjectInt(18);
1157        }
1158    
1159        /**
1160         * Drops the cart as a item. The exact item dropped is defined by getItemDropped().
1161         */
1162        public void dropCartAsItem()
1163        {
1164            for(ItemStack item : getItemsDropped())
1165            {
1166                entityDropItem(item, 0);
1167            }
1168        }
1169    
1170        /**
1171         * Override this to define which items your cart drops when broken.
1172         * This does not include items contained in the inventory,
1173         * that is handled elsewhere.
1174         * @return A list of items dropped.
1175         */
1176        public List<ItemStack> getItemsDropped()
1177        {
1178            List<ItemStack> items = new ArrayList<ItemStack>();
1179            items.add(new ItemStack(Item.minecartEmpty));
1180            
1181            switch(minecartType)
1182            {
1183                case 1:
1184                    items.add(new ItemStack(Block.chest));
1185                    break;
1186                case 2:
1187                    items.add(new ItemStack(Block.stoneOvenIdle));
1188                    break;
1189            }
1190            return items;
1191        }
1192    
1193        /**
1194         * This function returns an ItemStack that represents this cart.
1195         * This should be an ItemStack that can be used by the player to place the cart.
1196         * This is the item that was registered with the cart via the registerMinecart function,
1197         * but is not necessary the item the cart drops when destroyed.
1198         * @return An ItemStack that can be used to place the cart.
1199         */
1200        public ItemStack getCartItem()
1201        {
1202            return MinecartRegistry.getItemForCart(this);
1203        }
1204    
1205        /**
1206         * Returns true if this cart is self propelled.
1207         * @return True if powered.
1208         */
1209        public boolean isPoweredCart()
1210        {
1211            return minecartType == 2 && getClass() == EntityMinecart.class;
1212        }
1213    
1214        /** 
1215         * Returns true if this cart is a storage cart
1216         * Some carts may have inventories but not be storage carts
1217         * and some carts without inventories may be storage carts.
1218         * @return True if this cart should be classified as a storage cart.
1219         */
1220        public boolean isStorageCart()
1221        {
1222            return minecartType == 1 && getClass() == EntityMinecart.class;
1223        }
1224    
1225        /**
1226         * Returns true if this cart can be ridden by an Entity.
1227         * @return True if this cart can be ridden.
1228         */
1229        public boolean canBeRidden()
1230        {
1231            if(minecartType == 0 && getClass() == EntityMinecart.class)
1232            {
1233                return true;
1234            }
1235            return false;
1236        }
1237    
1238        /** 
1239         * Returns true if this cart can currently use rails.
1240         * This function is mainly used to gracefully detach a minecart from a rail.
1241         * @return True if the minecart can use rails.
1242         */
1243        public boolean canUseRail()
1244        {
1245            return canUseRail;
1246        }
1247    
1248        /**
1249         * Set whether the minecart can use rails.
1250         * This function is mainly used to gracefully detach a minecart from a rail.
1251         * @param use Whether the minecart can currently use rails.
1252         */
1253        public void setCanUseRail(boolean use)
1254        {
1255            canUseRail = use;
1256        }
1257    
1258        /** 
1259         * Return false if this cart should not call IRail.onMinecartPass() and should ignore Powered Rails.
1260         * @return True if this cart should call IRail.onMinecartPass().
1261         */
1262        public boolean shouldDoRailFunctions()
1263        {
1264            return true;
1265        }
1266    
1267        /**
1268         * Simply returns the minecartType variable.
1269         * @return minecartType
1270         */
1271        public int getMinecartType()
1272        {
1273            return minecartType;
1274        }
1275    
1276        /**
1277         * Gets the current global Minecart Collision handler if none
1278         * is registered, returns null
1279         * @return The collision handler or null
1280         */
1281        public static IMinecartCollisionHandler getCollisionHandler()
1282        {
1283            return collisionHandler;
1284        }
1285    
1286        /**
1287         * Sets the global Minecart Collision handler, overwrites any
1288         * that is currently set.
1289         * @param handler The new handler
1290         */
1291        public static void setCollisionHandler(IMinecartCollisionHandler handler)
1292        {
1293            collisionHandler = handler;
1294        }
1295    
1296        /**
1297         * Carts should return their drag factor here
1298         * @return The drag rate.
1299         */
1300        protected double getDrag()
1301        {
1302            return riddenByEntity != null ? defaultDragRidden : defaultDragEmpty;
1303        }   
1304    
1305        /**
1306         * Moved to allow overrides.
1307         * This code applies drag and updates push forces.
1308         */
1309        protected void applyDragAndPushForces()
1310        {
1311            if(isPoweredCart())
1312            {
1313                double d27 = MathHelper.sqrt_double(pushX * pushX + pushZ * pushZ);
1314                if(d27 > 0.01D)
1315                {
1316                    pushX /= d27;
1317                    pushZ /= d27;
1318                    double d29 = 0.04;
1319                    motionX *= 0.8D;
1320                    motionY *= 0.0D;
1321                    motionZ *= 0.8D;
1322                    motionX += pushX * d29;
1323                    motionZ += pushZ * d29;
1324                }
1325                else
1326                {
1327                    motionX *= 0.9D;
1328                    motionY *= 0.0D;
1329                    motionZ *= 0.9D;
1330                }
1331            }
1332            motionX *= getDrag();
1333            motionY *= 0.0D;
1334            motionZ *= getDrag();
1335        }
1336    
1337        /**
1338         * Moved to allow overrides.
1339         * This code updates push forces.
1340         */
1341        protected void updatePushForces()
1342        {
1343            if(isPoweredCart())
1344            {
1345                double push = MathHelper.sqrt_double(pushX * pushX + pushZ * pushZ);
1346                if(push > 0.01D && motionX * motionX + motionZ * motionZ > 0.001D)
1347                {
1348                    pushX /= push;
1349                    pushZ /= push;
1350                    if(pushX * motionX + pushZ * motionZ < 0.0D)
1351                    {
1352                        pushX = 0.0D;
1353                        pushZ = 0.0D;
1354                    }
1355                    else
1356                    {
1357                        pushX = motionX;
1358                        pushZ = motionZ;
1359                    }
1360                }
1361            }
1362        }
1363    
1364        /**
1365         * Moved to allow overrides.
1366         * This code handles minecart movement and speed capping when on a rail.
1367         */
1368        protected void moveMinecartOnRail(int i, int j, int k)
1369        {
1370            int id = worldObj.getBlockId(i, j, k);
1371            if (!BlockRail.isRailBlock(id))
1372            {
1373                    return;
1374            }
1375            float railMaxSpeed = ((BlockRail)Block.blocksList[id]).getRailMaxSpeed(worldObj, this, i, j, k);
1376    
1377            double maxSpeed = Math.min(railMaxSpeed, getMaxSpeedRail());
1378            double mX = motionX;
1379            double mZ = motionZ;
1380            if(riddenByEntity != null)
1381            {
1382                mX *= 0.75D;
1383                mZ *= 0.75D;
1384            }
1385            if(mX < -maxSpeed) mX = -maxSpeed;
1386            if(mX >  maxSpeed) mX =  maxSpeed;
1387            if(mZ < -maxSpeed) mZ = -maxSpeed;
1388            if(mZ >  maxSpeed) mZ =  maxSpeed;
1389            moveEntity(mX, 0.0D, mZ);
1390        }
1391    
1392        /**
1393         * Moved to allow overrides.
1394         * This code handles minecart movement and speed capping when not on a rail.
1395         */
1396        protected void moveMinecartOffRail(int i, int j, int k)
1397        {
1398            double d2 = getMaxSpeedGround();
1399            if(!onGround)
1400            {
1401                d2 = getMaxSpeedAirLateral();
1402            }
1403            if(motionX < -d2) motionX = -d2;
1404            if(motionX >  d2) motionX =  d2;
1405            if(motionZ < -d2) motionZ = -d2;
1406            if(motionZ >  d2) motionZ =  d2;
1407            double moveY = motionY;
1408            if(getMaxSpeedAirVertical() > 0 && motionY > getMaxSpeedAirVertical())
1409            {
1410                moveY = getMaxSpeedAirVertical();
1411                if(Math.abs(motionX) < 0.3f && Math.abs(motionZ) < 0.3f)
1412                {
1413                    moveY = 0.15f;
1414                    motionY = moveY;
1415                }
1416            }
1417            if(onGround)
1418            {
1419                motionX *= 0.5D;
1420                motionY *= 0.5D;
1421                motionZ *= 0.5D;
1422            }
1423            moveEntity(motionX, moveY, motionZ);
1424            if(!onGround)
1425            {
1426                motionX *= getDragAir();
1427                motionY *= getDragAir();
1428                motionZ *= getDragAir();
1429            }
1430        }
1431    
1432        /**
1433         * Moved to allow overrides.
1434         * This code applies fuel consumption.
1435         */
1436        protected void updateFuel()
1437        {
1438            if (fuel > 0) fuel--;
1439            if (fuel <= 0) pushX = pushZ = 0.0D;
1440            setMinecartPowered(fuel > 0);
1441        }
1442    
1443        /**
1444         * Moved to allow overrides, This code handle slopes affecting velocity.
1445         * @param metadata The blocks position metadata 
1446         */
1447        protected void adjustSlopeVelocities(int metadata) 
1448        {
1449            double acceleration = 0.0078125D;
1450            if (metadata == 2)
1451            {
1452                motionX -= acceleration;
1453            }
1454            else if (metadata == 3)
1455            {
1456                motionX += acceleration;
1457            }
1458            else if (metadata == 4)
1459            {
1460                motionZ += acceleration;
1461            }
1462            else if (metadata == 5)
1463            {
1464                motionZ -= acceleration;
1465            }
1466        }
1467    
1468        /**
1469         * Getters/setters for physics variables
1470         */
1471    
1472        /**
1473         * Returns the carts max speed.
1474         * Carts going faster than 1.1 cause issues with chunk loading.
1475         * Carts cant traverse slopes or corners at greater than 0.5 - 0.6.
1476         * This value is compared with the rails max speed to determine
1477         * the carts current max speed. A normal rails max speed is 0.4.
1478         * @return Carts max speed.
1479         */
1480        public float getMaxSpeedRail()
1481        {
1482            return maxSpeedRail;
1483        }
1484    
1485        public void setMaxSpeedRail(float value)
1486        {
1487            maxSpeedRail = value;
1488        }
1489    
1490        public float getMaxSpeedGround()
1491        {
1492            return maxSpeedGround;
1493        }
1494    
1495        public void setMaxSpeedGround(float value)
1496        {
1497            maxSpeedGround = value;
1498        }
1499    
1500        public float getMaxSpeedAirLateral()
1501        {
1502            return maxSpeedAirLateral;
1503        }
1504    
1505        public void setMaxSpeedAirLateral(float value)
1506        {
1507            maxSpeedAirLateral = value;
1508        }
1509    
1510        public float getMaxSpeedAirVertical()
1511        {
1512            return maxSpeedAirVertical;
1513        }
1514    
1515        public void setMaxSpeedAirVertical(float value)
1516        {
1517            maxSpeedAirVertical = value;
1518        }
1519    
1520        public double getDragAir()
1521        {
1522            return dragAir;
1523        }
1524    
1525        public void setDragAir(double value)
1526        {
1527            dragAir = value;
1528        }
1529    }