001    package net.minecraft.src;
002    
003    import cpw.mods.fml.common.Side;
004    import cpw.mods.fml.common.asm.SideOnly;
005    
006    import java.util.ArrayList;
007    import java.util.List;
008    import net.minecraftforge.common.IMinecartCollisionHandler;
009    import net.minecraftforge.common.MinecartRegistry;
010    import net.minecraftforge.common.MinecraftForge;
011    import net.minecraftforge.event.entity.minecart.MinecartCollisionEvent;
012    import net.minecraftforge.event.entity.minecart.MinecartInteractEvent;
013    import net.minecraftforge.event.entity.minecart.MinecartUpdateEvent;
014    
015    public class EntityMinecart extends Entity implements IInventory
016    {
017        /** Array of item stacks stored in minecart (for storage minecarts). */
018        protected ItemStack[] cargoItems;
019        protected int fuel;
020        protected boolean field_70499_f;
021    
022        /** The type of minecart, 2 for powered, 1 for storage. */
023        public int minecartType;
024        public double pushX;
025        public double pushZ;
026        protected final IUpdatePlayerListBox field_82344_g;
027        protected boolean field_82345_h;
028        protected static final int[][][] field_70500_g = new int[][][] {{{0, 0, -1}, {0, 0, 1}}, {{ -1, 0, 0}, {1, 0, 0}}, {{ -1, -1, 0}, {1, 0, 0}}, {{ -1, 0, 0}, {1, -1, 0}}, {{0, 0, -1}, {0, -1, 1}}, {{0, -1, -1}, {0, 0, 1}}, {{0, 0, 1}, {1, 0, 0}}, {{0, 0, 1}, { -1, 0, 0}}, {{0, 0, -1}, { -1, 0, 0}}, {{0, 0, -1}, {1, 0, 0}}};
029    
030        /** appears to be the progress of the turn */
031        protected int turnProgress;
032        protected double minecartX;
033        protected double minecartY;
034        protected double minecartZ;
035        protected double minecartYaw;
036        protected double minecartPitch;
037        @SideOnly(Side.CLIENT)
038        protected double velocityX;
039        @SideOnly(Side.CLIENT)
040        protected double velocityY;
041        @SideOnly(Side.CLIENT)
042        protected double velocityZ;
043    
044        /* Forge: Minecart Compatibility Layer Integration. */
045        public static float defaultMaxSpeedRail = 0.4f;
046        public static float defaultMaxSpeedGround = 0.4f;
047        public static float defaultMaxSpeedAirLateral = 0.4f;
048        public static float defaultMaxSpeedAirVertical = -1f;
049        public static double defaultDragRidden = 0.996999979019165D;
050        public static double defaultDragEmpty = 0.9599999785423279D;
051        public static double defaultDragAir = 0.94999998807907104D;
052        protected boolean canUseRail = true;
053        protected boolean canBePushed = true;
054        private static IMinecartCollisionHandler collisionHandler = null;
055    
056        /* Instance versions of the above physics properties */
057        protected float maxSpeedRail;
058        protected float maxSpeedGround;
059        protected float maxSpeedAirLateral;
060        protected float maxSpeedAirVertical;
061        protected double dragAir;
062    
063        public EntityMinecart(World par1World)
064        {
065            super(par1World);
066            this.cargoItems = new ItemStack[36];
067            this.fuel = 0;
068            this.field_70499_f = false;
069            this.field_82345_h = true;
070            this.preventEntitySpawning = true;
071            this.setSize(0.98F, 0.7F);
072            this.yOffset = this.height / 2.0F;
073            this.field_82344_g = par1World != null ? par1World.func_82735_a(this) : null;
074    
075            maxSpeedRail = defaultMaxSpeedRail;
076            maxSpeedGround = defaultMaxSpeedGround;
077            maxSpeedAirLateral = defaultMaxSpeedAirLateral;
078            maxSpeedAirVertical = defaultMaxSpeedAirVertical;
079            dragAir = defaultDragAir;
080        }
081    
082        public EntityMinecart(World world, int type)
083        {
084            this(world);
085            minecartType = type;
086        }
087    
088        /**
089         * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
090         * prevent them from trampling crops
091         */
092        protected boolean canTriggerWalking()
093        {
094            return false;
095        }
096    
097        protected void entityInit()
098        {
099            this.dataWatcher.addObject(16, new Byte((byte)0));
100            this.dataWatcher.addObject(17, new Integer(0));
101            this.dataWatcher.addObject(18, new Integer(1));
102            this.dataWatcher.addObject(19, new Integer(0));
103        }
104    
105        /**
106         * Returns a boundingBox used to collide the entity with other entities and blocks. This enables the entity to be
107         * pushable on contact, like boats or minecarts.
108         */
109        public AxisAlignedBB getCollisionBox(Entity par1Entity)
110        {
111            if (getCollisionHandler() != null)
112            {
113                return getCollisionHandler().getCollisionBox(this, par1Entity);
114            }
115            return par1Entity.boundingBox;
116        }
117    
118        /**
119         * returns the bounding box for this entity
120         */
121        public AxisAlignedBB getBoundingBox()
122        {
123            if (getCollisionHandler() != null)
124            {
125                return getCollisionHandler().getBoundingBox(this);
126            }
127            return null;
128        }
129    
130        /**
131         * Returns true if this entity should push and be pushed by other entities when colliding.
132         */
133        public boolean canBePushed()
134        {
135            return canBePushed;
136        }
137    
138        public EntityMinecart(World par1World, double par2, double par4, double par6, int par8)
139        {
140            this(par1World);
141            this.setPosition(par2, par4 + (double)this.yOffset, par6);
142            this.motionX = 0.0D;
143            this.motionY = 0.0D;
144            this.motionZ = 0.0D;
145            this.prevPosX = par2;
146            this.prevPosY = par4;
147            this.prevPosZ = par6;
148            this.minecartType = par8;
149        }
150    
151        /**
152         * Returns the Y offset from the entity's position for any entity riding this one.
153         */
154        public double getMountedYOffset()
155        {
156            return (double)this.height * 0.0D - 0.30000001192092896D;
157        }
158    
159        /**
160         * Called when the entity is attacked.
161         */
162        public boolean attackEntityFrom(DamageSource par1DamageSource, int par2)
163        {
164            if (!this.worldObj.isRemote && !this.isDead)
165            {
166                this.func_70494_i(-this.func_70493_k());
167                this.func_70497_h(10);
168                this.setBeenAttacked();
169                this.setDamage(this.getDamage() + par2 * 10);
170    
171                if (par1DamageSource.getEntity() instanceof EntityPlayer && ((EntityPlayer)par1DamageSource.getEntity()).capabilities.isCreativeMode)
172                {
173                    this.setDamage(100);
174                }
175    
176                if (this.getDamage() > 40)
177                {
178                    if (this.riddenByEntity != null)
179                    {
180                        this.riddenByEntity.mountEntity(this);
181                    }
182    
183                    this.setDead();
184                    dropCartAsItem();
185                }
186    
187                return true;
188            }
189            else
190            {
191                return true;
192            }
193        }
194    
195        @SideOnly(Side.CLIENT)
196    
197        /**
198         * Setups the entity to do the hurt animation. Only used by packets in multiplayer.
199         */
200        public void performHurtAnimation()
201        {
202            this.func_70494_i(-this.func_70493_k());
203            this.func_70497_h(10);
204            this.setDamage(this.getDamage() + this.getDamage() * 10);
205        }
206    
207        /**
208         * Returns true if other Entities should be prevented from moving through this Entity.
209         */
210        public boolean canBeCollidedWith()
211        {
212            return !this.isDead;
213        }
214    
215        /**
216         * Will get destroyed next tick.
217         */
218        public void setDead()
219        {
220            if (this.field_82345_h)
221            {
222                for (int var1 = 0; var1 < this.getSizeInventory(); ++var1)
223                {
224                    ItemStack var2 = this.getStackInSlot(var1);
225    
226                    if (var2 != null)
227                    {
228                        float var3 = this.rand.nextFloat() * 0.8F + 0.1F;
229                        float var4 = this.rand.nextFloat() * 0.8F + 0.1F;
230                        float var5 = this.rand.nextFloat() * 0.8F + 0.1F;
231    
232                        while (var2.stackSize > 0)
233                        {
234                            int var6 = this.rand.nextInt(21) + 10;
235    
236                            if (var6 > var2.stackSize)
237                            {
238                                var6 = var2.stackSize;
239                            }
240    
241                            var2.stackSize -= var6;
242                            EntityItem var7 = new EntityItem(this.worldObj, this.posX + (double)var3, this.posY + (double)var4, this.posZ + (double)var5, new ItemStack(var2.itemID, var6, var2.getItemDamage()));
243    
244                            if (var2.hasTagCompound())
245                            {
246                                var7.item.setTagCompound((NBTTagCompound)var2.getTagCompound().copy());
247                            }
248    
249                            float var8 = 0.05F;
250                            var7.motionX = (double)((float)this.rand.nextGaussian() * var8);
251                            var7.motionY = (double)((float)this.rand.nextGaussian() * var8 + 0.2F);
252                            var7.motionZ = (double)((float)this.rand.nextGaussian() * var8);
253                            this.worldObj.spawnEntityInWorld(var7);
254                        }
255                    }
256                }
257            }
258    
259            super.setDead();
260    
261            if (this.field_82344_g != null)
262            {
263                this.field_82344_g.update();
264            }
265        }
266    
267        /**
268         * Teleports the entity to another dimension. Params: Dimension number to teleport to
269         */
270        public void travelToDimension(int par1)
271        {
272            this.field_82345_h = false;
273            super.travelToDimension(par1);
274        }
275    
276        /**
277         * Called to update the entity's position/logic.
278         */
279        public void onUpdate()
280        {
281            if (this.field_82344_g != null)
282            {
283                this.field_82344_g.update();
284            }
285    
286            if (this.func_70496_j() > 0)
287            {
288                this.func_70497_h(this.func_70496_j() - 1);
289            }
290    
291            if (this.getDamage() > 0)
292            {
293                this.setDamage(this.getDamage() - 1);
294            }
295    
296            if (this.posY < -64.0D)
297            {
298                this.kill();
299            }
300    
301            if (this.isMinecartPowered() && this.rand.nextInt(4) == 0 && minecartType == 2 && getClass() == EntityMinecart.class)
302            {
303                this.worldObj.spawnParticle("largesmoke", this.posX, this.posY + 0.8D, this.posZ, 0.0D, 0.0D, 0.0D);
304            }
305    
306            if (this.worldObj.isRemote)
307            {
308                if (this.turnProgress > 0)
309                {
310                    double var45 = this.posX + (this.minecartX - this.posX) / (double)this.turnProgress;
311                    double var46 = this.posY + (this.minecartY - this.posY) / (double)this.turnProgress;
312                    double var5 = this.posZ + (this.minecartZ - this.posZ) / (double)this.turnProgress;
313                    double var7 = MathHelper.wrapAngleTo180_double(this.minecartYaw - (double)this.rotationYaw);
314                    this.rotationYaw = (float)((double)this.rotationYaw + var7 / (double)this.turnProgress);
315                    this.rotationPitch = (float)((double)this.rotationPitch + (this.minecartPitch - (double)this.rotationPitch) / (double)this.turnProgress);
316                    --this.turnProgress;
317                    this.setPosition(var45, var46, var5);
318                    this.setRotation(this.rotationYaw, this.rotationPitch);
319                }
320                else
321                {
322                    this.setPosition(this.posX, this.posY, this.posZ);
323                    this.setRotation(this.rotationYaw, this.rotationPitch);
324                }
325            }
326            else
327            {
328                this.prevPosX = this.posX;
329                this.prevPosY = this.posY;
330                this.prevPosZ = this.posZ;
331                this.motionY -= 0.03999999910593033D;
332                int var1 = MathHelper.floor_double(this.posX);
333                int var2 = MathHelper.floor_double(this.posY);
334                int var3 = MathHelper.floor_double(this.posZ);
335    
336                if (BlockRail.isRailBlockAt(this.worldObj, var1, var2 - 1, var3))
337                {
338                    --var2;
339                }
340    
341                double var4 = 0.4D;
342                double var6 = 0.0078125D;
343                int var8 = this.worldObj.getBlockId(var1, var2, var3);
344    
345                if (canUseRail() && BlockRail.isRailBlock(var8))
346                {
347                    Vec3 var9 = this.func_70489_a(this.posX, this.posY, this.posZ);
348                    int var10 = ((BlockRail)Block.blocksList[var8]).getBasicRailMetadata(worldObj, this, var1, var2, var3);
349                    this.posY = (double)var2;
350                    boolean var11 = false;
351                    boolean var12 = false;
352    
353                    if (var8 == Block.railPowered.blockID)
354                    {
355                        var11 = (worldObj.getBlockMetadata(var1, var2, var3) & 8) != 0;
356                        var12 = !var11;
357                    }
358    
359                    if (((BlockRail)Block.blocksList[var8]).isPowered())
360                    {
361                        var10 &= 7;
362                    }
363    
364                    if (var10 >= 2 && var10 <= 5)
365                    {
366                        this.posY = (double)(var2 + 1);
367                    }
368    
369                    adjustSlopeVelocities(var10);
370    
371                    int[][] var13 = field_70500_g[var10];
372                    double var14 = (double)(var13[1][0] - var13[0][0]);
373                    double var16 = (double)(var13[1][2] - var13[0][2]);
374                    double var18 = Math.sqrt(var14 * var14 + var16 * var16);
375                    double var20 = this.motionX * var14 + this.motionZ * var16;
376    
377                    if (var20 < 0.0D)
378                    {
379                        var14 = -var14;
380                        var16 = -var16;
381                    }
382    
383                    double var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
384                    this.motionX = var22 * var14 / var18;
385                    this.motionZ = var22 * var16 / var18;
386                    double var24;
387                    double var26;
388    
389                    if (this.riddenByEntity != null)
390                    {
391                        var24 = this.riddenByEntity.motionX * this.riddenByEntity.motionX + this.riddenByEntity.motionZ * this.riddenByEntity.motionZ;
392                        var26 = this.motionX * this.motionX + this.motionZ * this.motionZ;
393    
394                        if (var24 > 1.0E-4D && var26 < 0.01D)
395                        {
396                            this.motionX += this.riddenByEntity.motionX * 0.1D;
397                            this.motionZ += this.riddenByEntity.motionZ * 0.1D;
398                            var12 = false;
399                        }
400                    }
401    
402                    if (var12 && shouldDoRailFunctions())
403                    {
404                        var24 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
405    
406                        if (var24 < 0.03D)
407                        {
408                            this.motionX *= 0.0D;
409                            this.motionY *= 0.0D;
410                            this.motionZ *= 0.0D;
411                        }
412                        else
413                        {
414                            this.motionX *= 0.5D;
415                            this.motionY *= 0.0D;
416                            this.motionZ *= 0.5D;
417                        }
418                    }
419    
420                    var24 = 0.0D;
421                    var26 = (double)var1 + 0.5D + (double)var13[0][0] * 0.5D;
422                    double var28 = (double)var3 + 0.5D + (double)var13[0][2] * 0.5D;
423                    double var30 = (double)var1 + 0.5D + (double)var13[1][0] * 0.5D;
424                    double var32 = (double)var3 + 0.5D + (double)var13[1][2] * 0.5D;
425                    var14 = var30 - var26;
426                    var16 = var32 - var28;
427                    double var34;
428                    double var36;
429    
430                    if (var14 == 0.0D)
431                    {
432                        this.posX = (double)var1 + 0.5D;
433                        var24 = this.posZ - (double)var3;
434                    }
435                    else if (var16 == 0.0D)
436                    {
437                        this.posZ = (double)var3 + 0.5D;
438                        var24 = this.posX - (double)var1;
439                    }
440                    else
441                    {
442                        var34 = this.posX - var26;
443                        var36 = this.posZ - var28;
444                        var24 = (var34 * var14 + var36 * var16) * 2.0D;
445                    }
446    
447                    this.posX = var26 + var14 * var24;
448                    this.posZ = var28 + var16 * var24;
449                    this.setPosition(this.posX, this.posY + (double)this.yOffset, this.posZ);
450    
451                    moveMinecartOnRail(var1, var2, var3);
452    
453                    if (var13[0][1] != 0 && MathHelper.floor_double(this.posX) - var1 == var13[0][0] && MathHelper.floor_double(this.posZ) - var3 == var13[0][2])
454                    {
455                        this.setPosition(this.posX, this.posY + (double)var13[0][1], this.posZ);
456                    }
457                    else if (var13[1][1] != 0 && MathHelper.floor_double(this.posX) - var1 == var13[1][0] && MathHelper.floor_double(this.posZ) - var3 == var13[1][2])
458                    {
459                        this.setPosition(this.posX, this.posY + (double)var13[1][1], this.posZ);
460                    }
461    
462                    applyDragAndPushForces();
463    
464                    Vec3 var52 = this.func_70489_a(this.posX, this.posY, this.posZ);
465    
466                    if (var52 != null && var9 != null)
467                    {
468                        double var39 = (var9.yCoord - var52.yCoord) * 0.05D;
469                        var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
470    
471                        if (var22 > 0.0D)
472                        {
473                            this.motionX = this.motionX / var22 * (var22 + var39);
474                            this.motionZ = this.motionZ / var22 * (var22 + var39);
475                        }
476    
477                        this.setPosition(this.posX, var52.yCoord, this.posZ);
478                    }
479    
480                    int var51 = MathHelper.floor_double(this.posX);
481                    int var53 = MathHelper.floor_double(this.posZ);
482    
483                    if (var51 != var1 || var53 != var3)
484                    {
485                        var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
486                        this.motionX = var22 * (double)(var51 - var1);
487                        this.motionZ = var22 * (double)(var53 - var3);
488                    }
489    
490                    double var41;
491    
492                    updatePushForces();
493                    
494                    if(shouldDoRailFunctions())
495                    {
496                        ((BlockRail)Block.blocksList[var8]).onMinecartPass(worldObj, this, var1, var2, var3);
497                    }
498    
499                    if (var11 && shouldDoRailFunctions())
500                    {
501                        var41 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
502    
503                        if (var41 > 0.01D)
504                        {
505                            double var43 = 0.06D;
506                            this.motionX += this.motionX / var41 * var43;
507                            this.motionZ += this.motionZ / var41 * var43;
508                        }
509                        else if (var10 == 1)
510                        {
511                            if (this.worldObj.isBlockNormalCube(var1 - 1, var2, var3))
512                            {
513                                this.motionX = 0.02D;
514                            }
515                            else if (this.worldObj.isBlockNormalCube(var1 + 1, var2, var3))
516                            {
517                                this.motionX = -0.02D;
518                            }
519                        }
520                        else if (var10 == 0)
521                        {
522                            if (this.worldObj.isBlockNormalCube(var1, var2, var3 - 1))
523                            {
524                                this.motionZ = 0.02D;
525                            }
526                            else if (this.worldObj.isBlockNormalCube(var1, var2, var3 + 1))
527                            {
528                                this.motionZ = -0.02D;
529                            }
530                        }
531                    }
532                }
533                else
534                {
535                    moveMinecartOffRail(var1, var2, var3);
536                }
537    
538                this.doBlockCollisions();
539                this.rotationPitch = 0.0F;
540                double var47 = this.prevPosX - this.posX;
541                double var48 = this.prevPosZ - this.posZ;
542    
543                if (var47 * var47 + var48 * var48 > 0.001D)
544                {
545                    this.rotationYaw = (float)(Math.atan2(var48, var47) * 180.0D / Math.PI);
546    
547                    if (this.field_70499_f)
548                    {
549                        this.rotationYaw += 180.0F;
550                    }
551                }
552    
553                double var49 = (double)MathHelper.wrapAngleTo180_float(this.rotationYaw - this.prevRotationYaw);
554    
555                if (var49 < -170.0D || var49 >= 170.0D)
556                {
557                    this.rotationYaw += 180.0F;
558                    this.field_70499_f = !this.field_70499_f;
559                }
560    
561                this.setRotation(this.rotationYaw, this.rotationPitch);
562    
563                AxisAlignedBB box = null;
564                if (getCollisionHandler() != null)
565                {
566                    box = getCollisionHandler().getMinecartCollisionBox(this);
567                }
568                else
569                {
570                    box = boundingBox.expand(0.2D, 0.0D, 0.2D);
571                }
572    
573                List var15 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, box);
574    
575                if (var15 != null && !var15.isEmpty())
576                {
577                    for (int var50 = 0; var50 < var15.size(); ++var50)
578                    {
579                        Entity var17 = (Entity)var15.get(var50);
580    
581                        if (var17 != this.riddenByEntity && var17.canBePushed() && var17 instanceof EntityMinecart)
582                        {
583                            var17.applyEntityCollision(this);
584                        }
585                    }
586                }
587    
588                if (this.riddenByEntity != null && this.riddenByEntity.isDead)
589                {
590                    if (this.riddenByEntity.ridingEntity == this)
591                    {
592                        this.riddenByEntity.ridingEntity = null;
593                    }
594    
595                    this.riddenByEntity = null;
596                }
597    
598                updateFuel();
599                MinecraftForge.EVENT_BUS.post(new MinecartUpdateEvent(this, var1, var2, var3));
600            }
601        }
602    
603        @SideOnly(Side.CLIENT)
604        public Vec3 func_70495_a(double par1, double par3, double par5, double par7)
605        {
606            int var9 = MathHelper.floor_double(par1);
607            int var10 = MathHelper.floor_double(par3);
608            int var11 = MathHelper.floor_double(par5);
609    
610            if (BlockRail.isRailBlockAt(this.worldObj, var9, var10 - 1, var11))
611            {
612                --var10;
613            }
614    
615            int var12 = this.worldObj.getBlockId(var9, var10, var11);
616    
617            if (!BlockRail.isRailBlock(var12))
618            {
619                return null;
620            }
621            else
622            {
623                int var13 = ((BlockRail)Block.blocksList[var12]).getBasicRailMetadata(worldObj, this, var9, var10, var11);
624    
625                par3 = (double)var10;
626    
627                if (var13 >= 2 && var13 <= 5)
628                {
629                    par3 = (double)(var10 + 1);
630                }
631    
632                int[][] var14 = field_70500_g[var13];
633                double var15 = (double)(var14[1][0] - var14[0][0]);
634                double var17 = (double)(var14[1][2] - var14[0][2]);
635                double var19 = Math.sqrt(var15 * var15 + var17 * var17);
636                var15 /= var19;
637                var17 /= var19;
638                par1 += var15 * par7;
639                par5 += var17 * par7;
640    
641                if (var14[0][1] != 0 && MathHelper.floor_double(par1) - var9 == var14[0][0] && MathHelper.floor_double(par5) - var11 == var14[0][2])
642                {
643                    par3 += (double)var14[0][1];
644                }
645                else if (var14[1][1] != 0 && MathHelper.floor_double(par1) - var9 == var14[1][0] && MathHelper.floor_double(par5) - var11 == var14[1][2])
646                {
647                    par3 += (double)var14[1][1];
648                }
649    
650                return this.func_70489_a(par1, par3, par5);
651            }
652        }
653    
654        public Vec3 func_70489_a(double par1, double par3, double par5)
655        {
656            int var7 = MathHelper.floor_double(par1);
657            int var8 = MathHelper.floor_double(par3);
658            int var9 = MathHelper.floor_double(par5);
659    
660            if (BlockRail.isRailBlockAt(this.worldObj, var7, var8 - 1, var9))
661            {
662                --var8;
663            }
664    
665            int var10 = this.worldObj.getBlockId(var7, var8, var9);
666    
667            if (BlockRail.isRailBlock(var10))
668            {
669                int var11 = ((BlockRail)Block.blocksList[var10]).getBasicRailMetadata(worldObj, this, var7, var8, var9);
670                par3 = (double)var8;
671    
672                if (var11 >= 2 && var11 <= 5)
673                {
674                    par3 = (double)(var8 + 1);
675                }
676    
677                int[][] var12 = field_70500_g[var11];
678                double var13 = 0.0D;
679                double var15 = (double)var7 + 0.5D + (double)var12[0][0] * 0.5D;
680                double var17 = (double)var8 + 0.5D + (double)var12[0][1] * 0.5D;
681                double var19 = (double)var9 + 0.5D + (double)var12[0][2] * 0.5D;
682                double var21 = (double)var7 + 0.5D + (double)var12[1][0] * 0.5D;
683                double var23 = (double)var8 + 0.5D + (double)var12[1][1] * 0.5D;
684                double var25 = (double)var9 + 0.5D + (double)var12[1][2] * 0.5D;
685                double var27 = var21 - var15;
686                double var29 = (var23 - var17) * 2.0D;
687                double var31 = var25 - var19;
688    
689                if (var27 == 0.0D)
690                {
691                    par1 = (double)var7 + 0.5D;
692                    var13 = par5 - (double)var9;
693                }
694                else if (var31 == 0.0D)
695                {
696                    par5 = (double)var9 + 0.5D;
697                    var13 = par1 - (double)var7;
698                }
699                else
700                {
701                    double var33 = par1 - var15;
702                    double var35 = par5 - var19;
703                    var13 = (var33 * var27 + var35 * var31) * 2.0D;
704                }
705    
706                par1 = var15 + var27 * var13;
707                par3 = var17 + var29 * var13;
708                par5 = var19 + var31 * var13;
709    
710                if (var29 < 0.0D)
711                {
712                    ++par3;
713                }
714    
715                if (var29 > 0.0D)
716                {
717                    par3 += 0.5D;
718                }
719    
720                return this.worldObj.getWorldVec3Pool().getVecFromPool(par1, par3, par5);
721            }
722            else
723            {
724                return null;
725            }
726        }
727    
728        /**
729         * (abstract) Protected helper method to write subclass entity data to NBT.
730         */
731        protected void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
732        {
733            par1NBTTagCompound.setInteger("Type", this.minecartType);
734    
735            if (isPoweredCart())
736            {
737                par1NBTTagCompound.setDouble("PushX", this.pushX);
738                par1NBTTagCompound.setDouble("PushZ", this.pushZ);
739                par1NBTTagCompound.setInteger("Fuel", this.fuel);
740            }
741    
742            if (getSizeInventory() > 0)
743            {
744                NBTTagList var2 = new NBTTagList();
745    
746                for (int var3 = 0; var3 < this.cargoItems.length; ++var3)
747                {
748                    if (this.cargoItems[var3] != null)
749                    {
750                        NBTTagCompound var4 = new NBTTagCompound();
751                        var4.setByte("Slot", (byte)var3);
752                        this.cargoItems[var3].writeToNBT(var4);
753                        var2.appendTag(var4);
754                    }
755                }
756    
757                par1NBTTagCompound.setTag("Items", var2);
758            }
759        }
760    
761        /**
762         * (abstract) Protected helper method to read subclass entity data from NBT.
763         */
764        protected void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
765        {
766            this.minecartType = par1NBTTagCompound.getInteger("Type");
767    
768            if (isPoweredCart())
769            {
770                this.pushX = par1NBTTagCompound.getDouble("PushX");
771                this.pushZ = par1NBTTagCompound.getDouble("PushZ");
772                try
773                {
774                    this.fuel = par1NBTTagCompound.getInteger("Fuel");
775                }
776                catch (ClassCastException e)
777                {
778                    this.fuel = par1NBTTagCompound.getShort("Fuel");
779                }
780            }
781    
782            if (getSizeInventory() > 0)
783            {
784                NBTTagList var2 = par1NBTTagCompound.getTagList("Items");
785                this.cargoItems = new ItemStack[this.getSizeInventory()];
786    
787                for (int var3 = 0; var3 < var2.tagCount(); ++var3)
788                {
789                    NBTTagCompound var4 = (NBTTagCompound)var2.tagAt(var3);
790                    int var5 = var4.getByte("Slot") & 255;
791    
792                    if (var5 >= 0 && var5 < this.cargoItems.length)
793                    {
794                        this.cargoItems[var5] = ItemStack.loadItemStackFromNBT(var4);
795                    }
796                }
797            }
798        }
799    
800        @SideOnly(Side.CLIENT)
801        public float getShadowSize()
802        {
803            return 0.0F;
804        }
805    
806        /**
807         * Applies a velocity to each of the entities pushing them away from each other. Args: entity
808         */
809        public void applyEntityCollision(Entity par1Entity)
810        {
811            MinecraftForge.EVENT_BUS.post(new MinecartCollisionEvent(this, par1Entity));
812            if (getCollisionHandler() != null)
813            {
814                getCollisionHandler().onEntityCollision(this, par1Entity);
815                return;
816            }
817            if (!this.worldObj.isRemote)
818            {
819                if (par1Entity != this.riddenByEntity)
820                {
821                    if (par1Entity instanceof EntityLiving && !(par1Entity instanceof EntityPlayer) && !(par1Entity instanceof EntityIronGolem) && canBeRidden() && this.motionX * this.motionX + this.motionZ * this.motionZ > 0.01D && this.riddenByEntity == null && par1Entity.ridingEntity == null)
822                    {
823                        par1Entity.mountEntity(this);
824                    }
825    
826                    double var2 = par1Entity.posX - this.posX;
827                    double var4 = par1Entity.posZ - this.posZ;
828                    double var6 = var2 * var2 + var4 * var4;
829    
830                    if (var6 >= 9.999999747378752E-5D)
831                    {
832                        var6 = (double)MathHelper.sqrt_double(var6);
833                        var2 /= var6;
834                        var4 /= var6;
835                        double var8 = 1.0D / var6;
836    
837                        if (var8 > 1.0D)
838                        {
839                            var8 = 1.0D;
840                        }
841    
842                        var2 *= var8;
843                        var4 *= var8;
844                        var2 *= 0.10000000149011612D;
845                        var4 *= 0.10000000149011612D;
846                        var2 *= (double)(1.0F - this.entityCollisionReduction);
847                        var4 *= (double)(1.0F - this.entityCollisionReduction);
848                        var2 *= 0.5D;
849                        var4 *= 0.5D;
850    
851                        if (par1Entity instanceof EntityMinecart)
852                        {
853                            double var10 = par1Entity.posX - this.posX;
854                            double var12 = par1Entity.posZ - this.posZ;
855                            Vec3 var14 = this.worldObj.getWorldVec3Pool().getVecFromPool(var10, 0.0D, var12).normalize();
856                            Vec3 var15 = this.worldObj.getWorldVec3Pool().getVecFromPool((double)MathHelper.cos(this.rotationYaw * (float)Math.PI / 180.0F), 0.0D, (double)MathHelper.sin(this.rotationYaw * (float)Math.PI / 180.0F)).normalize();
857                            double var16 = Math.abs(var14.dotProduct(var15));
858    
859                            if (var16 < 0.800000011920929D)
860                            {
861                                return;
862                            }
863    
864                            double var18 = par1Entity.motionX + this.motionX;
865                            double var20 = par1Entity.motionZ + this.motionZ;
866    
867                            if (((EntityMinecart)par1Entity).isPoweredCart() && !isPoweredCart())
868                            {
869                                this.motionX *= 0.20000000298023224D;
870                                this.motionZ *= 0.20000000298023224D;
871                                this.addVelocity(par1Entity.motionX - var2, 0.0D, par1Entity.motionZ - var4);
872                                par1Entity.motionX *= 0.949999988079071D;
873                                par1Entity.motionZ *= 0.949999988079071D;
874                            }
875                            else if (!((EntityMinecart)par1Entity).isPoweredCart() && isPoweredCart())
876                            {
877                                par1Entity.motionX *= 0.20000000298023224D;
878                                par1Entity.motionZ *= 0.20000000298023224D;
879                                par1Entity.addVelocity(this.motionX + var2, 0.0D, this.motionZ + var4);
880                                this.motionX *= 0.949999988079071D;
881                                this.motionZ *= 0.949999988079071D;
882                            }
883                            else
884                            {
885                                var18 /= 2.0D;
886                                var20 /= 2.0D;
887                                this.motionX *= 0.20000000298023224D;
888                                this.motionZ *= 0.20000000298023224D;
889                                this.addVelocity(var18 - var2, 0.0D, var20 - var4);
890                                par1Entity.motionX *= 0.20000000298023224D;
891                                par1Entity.motionZ *= 0.20000000298023224D;
892                                par1Entity.addVelocity(var18 + var2, 0.0D, var20 + var4);
893                            }
894                        }
895                        else
896                        {
897                            this.addVelocity(-var2, 0.0D, -var4);
898                            par1Entity.addVelocity(var2 / 4.0D, 0.0D, var4 / 4.0D);
899                        }
900                    }
901                }
902            }
903        }
904    
905        /**
906         * Returns the number of slots in the inventory.
907         */
908        public int getSizeInventory()
909        {
910            return (minecartType == 1 && getClass() == EntityMinecart.class ? 27 : 0);
911        }
912    
913        /**
914         * Returns the stack in slot i
915         */
916        public ItemStack getStackInSlot(int par1)
917        {
918            return this.cargoItems[par1];
919        }
920    
921        /**
922         * Removes from an inventory slot (first arg) up to a specified number (second arg) of items and returns them in a
923         * new stack.
924         */
925        public ItemStack decrStackSize(int par1, int par2)
926        {
927            if (this.cargoItems[par1] != null)
928            {
929                ItemStack var3;
930    
931                if (this.cargoItems[par1].stackSize <= par2)
932                {
933                    var3 = this.cargoItems[par1];
934                    this.cargoItems[par1] = null;
935                    return var3;
936                }
937                else
938                {
939                    var3 = this.cargoItems[par1].splitStack(par2);
940    
941                    if (this.cargoItems[par1].stackSize == 0)
942                    {
943                        this.cargoItems[par1] = null;
944                    }
945    
946                    return var3;
947                }
948            }
949            else
950            {
951                return null;
952            }
953        }
954    
955        /**
956         * When some containers are closed they call this on each slot, then drop whatever it returns as an EntityItem -
957         * like when you close a workbench GUI.
958         */
959        public ItemStack getStackInSlotOnClosing(int par1)
960        {
961            if (this.cargoItems[par1] != null)
962            {
963                ItemStack var2 = this.cargoItems[par1];
964                this.cargoItems[par1] = null;
965                return var2;
966            }
967            else
968            {
969                return null;
970            }
971        }
972    
973        /**
974         * Sets the given item stack to the specified slot in the inventory (can be crafting or armor sections).
975         */
976        public void setInventorySlotContents(int par1, ItemStack par2ItemStack)
977        {
978            this.cargoItems[par1] = par2ItemStack;
979    
980            if (par2ItemStack != null && par2ItemStack.stackSize > this.getInventoryStackLimit())
981            {
982                par2ItemStack.stackSize = this.getInventoryStackLimit();
983            }
984        }
985    
986        /**
987         * Returns the name of the inventory.
988         */
989        public String getInvName()
990        {
991            return "container.minecart";
992        }
993    
994        /**
995         * Returns the maximum stack size for a inventory slot. Seems to always be 64, possibly will be extended. *Isn't
996         * this more of a set than a get?*
997         */
998        public int getInventoryStackLimit()
999        {
1000            return 64;
1001        }
1002    
1003        /**
1004         * Called when an the contents of an Inventory change, usually
1005         */
1006        public void onInventoryChanged() {}
1007    
1008        /**
1009         * Called when a player interacts with a mob. e.g. gets milk from a cow, gets into the saddle on a pig.
1010         */
1011        public boolean interact(EntityPlayer par1EntityPlayer)
1012        {
1013            if (MinecraftForge.EVENT_BUS.post(new MinecartInteractEvent(this, par1EntityPlayer)))
1014            {
1015                return true;
1016            }
1017    
1018            if (canBeRidden())
1019            {
1020                if (this.riddenByEntity != null && this.riddenByEntity instanceof EntityPlayer && this.riddenByEntity != par1EntityPlayer)
1021                {
1022                    return true;
1023                }
1024    
1025                if (!this.worldObj.isRemote)
1026                {
1027                    par1EntityPlayer.mountEntity(this);
1028                }
1029            }
1030            else if (getSizeInventory() > 0)
1031            {
1032                if (!this.worldObj.isRemote)
1033                {
1034                    par1EntityPlayer.displayGUIChest(this);
1035                }
1036            }
1037            else if (this.minecartType == 2 && getClass() == EntityMinecart.class)
1038            {
1039                ItemStack var2 = par1EntityPlayer.inventory.getCurrentItem();
1040    
1041                if (var2 != null && var2.itemID == Item.coal.shiftedIndex)
1042                {
1043                    if (--var2.stackSize == 0)
1044                    {
1045                        par1EntityPlayer.inventory.setInventorySlotContents(par1EntityPlayer.inventory.currentItem, (ItemStack)null);
1046                    }
1047    
1048                    this.fuel += 3600;
1049                }
1050    
1051                this.pushX = this.posX - par1EntityPlayer.posX;
1052                this.pushZ = this.posZ - par1EntityPlayer.posZ;
1053            }
1054    
1055            return true;
1056        }
1057    
1058        @SideOnly(Side.CLIENT)
1059    
1060        /**
1061         * Sets the position and rotation. Only difference from the other one is no bounding on the rotation. Args: posX,
1062         * posY, posZ, yaw, pitch
1063         */
1064        public void setPositionAndRotation2(double par1, double par3, double par5, float par7, float par8, int par9)
1065        {
1066            this.minecartX = par1;
1067            this.minecartY = par3;
1068            this.minecartZ = par5;
1069            this.minecartYaw = (double)par7;
1070            this.minecartPitch = (double)par8;
1071            this.turnProgress = par9 + 2;
1072            this.motionX = this.velocityX;
1073            this.motionY = this.velocityY;
1074            this.motionZ = this.velocityZ;
1075        }
1076    
1077        /**
1078         * Do not make give this method the name canInteractWith because it clashes with Container
1079         */
1080        public boolean isUseableByPlayer(EntityPlayer par1EntityPlayer)
1081        {
1082            return this.isDead ? false : par1EntityPlayer.getDistanceSqToEntity(this) <= 64.0D;
1083        }
1084    
1085        @SideOnly(Side.CLIENT)
1086    
1087        /**
1088         * Sets the velocity to the args. Args: x, y, z
1089         */
1090        public void setVelocity(double par1, double par3, double par5)
1091        {
1092            this.velocityX = this.motionX = par1;
1093            this.velocityY = this.motionY = par3;
1094            this.velocityZ = this.motionZ = par5;
1095        }
1096    
1097        /**
1098         * Is this minecart powered (Fuel > 0)
1099         */
1100        public boolean isMinecartPowered()
1101        {
1102            return (this.dataWatcher.getWatchableObjectByte(16) & 1) != 0;
1103        }
1104    
1105        /**
1106         * Set if this minecart is powered (Fuel > 0)
1107         */
1108        protected void setMinecartPowered(boolean par1)
1109        {
1110            if (par1)
1111            {
1112                this.dataWatcher.updateObject(16, Byte.valueOf((byte)(this.dataWatcher.getWatchableObjectByte(16) | 1)));
1113            }
1114            else
1115            {
1116                this.dataWatcher.updateObject(16, Byte.valueOf((byte)(this.dataWatcher.getWatchableObjectByte(16) & -2)));
1117            }
1118        }
1119    
1120        public void openChest() {}
1121    
1122        public void closeChest() {}
1123    
1124        /**
1125         * Sets the current amount of damage the minecart has taken. Decreases over time. The cart breaks when this is over
1126         * 40.
1127         */
1128        public void setDamage(int par1)
1129        {
1130            this.dataWatcher.updateObject(19, Integer.valueOf(par1));
1131        }
1132    
1133        /**
1134         * Gets the current amount of damage the minecart has taken. Decreases over time. The cart breaks when this is over
1135         * 40.
1136         */
1137        public int getDamage()
1138        {
1139            return this.dataWatcher.getWatchableObjectInt(19);
1140        }
1141    
1142        public void func_70497_h(int par1)
1143        {
1144            this.dataWatcher.updateObject(17, Integer.valueOf(par1));
1145        }
1146    
1147        public int func_70496_j()
1148        {
1149            return this.dataWatcher.getWatchableObjectInt(17);
1150        }
1151    
1152        public void func_70494_i(int par1)
1153        {
1154            this.dataWatcher.updateObject(18, Integer.valueOf(par1));
1155        }
1156    
1157        public int func_70493_k()
1158        {
1159            return this.dataWatcher.getWatchableObjectInt(18);
1160        }
1161    
1162        /**
1163         * Drops the cart as a item. The exact item dropped is defined by getItemDropped().
1164         */
1165        public void dropCartAsItem()
1166        {
1167            for(ItemStack item : getItemsDropped())
1168            {
1169                entityDropItem(item, 0);
1170            }
1171        }
1172    
1173        /**
1174         * Override this to define which items your cart drops when broken.
1175         * This does not include items contained in the inventory,
1176         * that is handled elsewhere.
1177         * @return A list of items dropped.
1178         */
1179        public List<ItemStack> getItemsDropped()
1180        {
1181            List<ItemStack> items = new ArrayList<ItemStack>();
1182            items.add(new ItemStack(Item.minecartEmpty));
1183            
1184            switch(minecartType)
1185            {
1186                case 1:
1187                    items.add(new ItemStack(Block.chest));
1188                    break;
1189                case 2:
1190                    items.add(new ItemStack(Block.stoneOvenIdle));
1191                    break;
1192            }
1193            return items;
1194        }
1195    
1196        /**
1197         * This function returns an ItemStack that represents this cart.
1198         * This should be an ItemStack that can be used by the player to place the cart.
1199         * This is the item that was registered with the cart via the registerMinecart function,
1200         * but is not necessary the item the cart drops when destroyed.
1201         * @return An ItemStack that can be used to place the cart.
1202         */
1203        public ItemStack getCartItem()
1204        {
1205            return MinecartRegistry.getItemForCart(this);
1206        }
1207    
1208        /**
1209         * Returns true if this cart is self propelled.
1210         * @return True if powered.
1211         */
1212        public boolean isPoweredCart()
1213        {
1214            return minecartType == 2 && getClass() == EntityMinecart.class;
1215        }
1216    
1217        /** 
1218         * Returns true if this cart is a storage cart
1219         * Some carts may have inventories but not be storage carts
1220         * and some carts without inventories may be storage carts.
1221         * @return True if this cart should be classified as a storage cart.
1222         */
1223        public boolean isStorageCart()
1224        {
1225            return minecartType == 1 && getClass() == EntityMinecart.class;
1226        }
1227    
1228        /**
1229         * Returns true if this cart can be ridden by an Entity.
1230         * @return True if this cart can be ridden.
1231         */
1232        public boolean canBeRidden()
1233        {
1234            if(minecartType == 0 && getClass() == EntityMinecart.class)
1235            {
1236                return true;
1237            }
1238            return false;
1239        }
1240    
1241        /** 
1242         * Returns true if this cart can currently use rails.
1243         * This function is mainly used to gracefully detach a minecart from a rail.
1244         * @return True if the minecart can use rails.
1245         */
1246        public boolean canUseRail()
1247        {
1248            return canUseRail;
1249        }
1250    
1251        /**
1252         * Set whether the minecart can use rails.
1253         * This function is mainly used to gracefully detach a minecart from a rail.
1254         * @param use Whether the minecart can currently use rails.
1255         */
1256        public void setCanUseRail(boolean use)
1257        {
1258            canUseRail = use;
1259        }
1260    
1261        /** 
1262         * Return false if this cart should not call IRail.onMinecartPass() and should ignore Powered Rails.
1263         * @return True if this cart should call IRail.onMinecartPass().
1264         */
1265        public boolean shouldDoRailFunctions()
1266        {
1267            return true;
1268        }
1269    
1270        /**
1271         * Simply returns the minecartType variable.
1272         * @return minecartType
1273         */
1274        public int getMinecartType()
1275        {
1276            return minecartType;
1277        }
1278    
1279        /**
1280         * Gets the current global Minecart Collision handler if none
1281         * is registered, returns null
1282         * @return The collision handler or null
1283         */
1284        public static IMinecartCollisionHandler getCollisionHandler()
1285        {
1286            return collisionHandler;
1287        }
1288    
1289        /**
1290         * Sets the global Minecart Collision handler, overwrites any
1291         * that is currently set.
1292         * @param handler The new handler
1293         */
1294        public static void setCollisionHandler(IMinecartCollisionHandler handler)
1295        {
1296            collisionHandler = handler;
1297        }
1298    
1299        /**
1300         * Carts should return their drag factor here
1301         * @return The drag rate.
1302         */
1303        protected double getDrag()
1304        {
1305            return riddenByEntity != null ? defaultDragRidden : defaultDragEmpty;
1306        }   
1307    
1308        /**
1309         * Moved to allow overrides.
1310         * This code applies drag and updates push forces.
1311         */
1312        protected void applyDragAndPushForces()
1313        {
1314            if(isPoweredCart())
1315            {
1316                double d27 = MathHelper.sqrt_double(pushX * pushX + pushZ * pushZ);
1317                if(d27 > 0.01D)
1318                {
1319                    pushX /= d27;
1320                    pushZ /= d27;
1321                    double d29 = 0.04;
1322                    motionX *= 0.8D;
1323                    motionY *= 0.0D;
1324                    motionZ *= 0.8D;
1325                    motionX += pushX * d29;
1326                    motionZ += pushZ * d29;
1327                }
1328                else
1329                {
1330                    motionX *= 0.9D;
1331                    motionY *= 0.0D;
1332                    motionZ *= 0.9D;
1333                }
1334            }
1335            motionX *= getDrag();
1336            motionY *= 0.0D;
1337            motionZ *= getDrag();
1338        }
1339    
1340        /**
1341         * Moved to allow overrides.
1342         * This code updates push forces.
1343         */
1344        protected void updatePushForces()
1345        {
1346            if(isPoweredCart())
1347            {
1348                double push = MathHelper.sqrt_double(pushX * pushX + pushZ * pushZ);
1349                if(push > 0.01D && motionX * motionX + motionZ * motionZ > 0.001D)
1350                {
1351                    pushX /= push;
1352                    pushZ /= push;
1353                    if(pushX * motionX + pushZ * motionZ < 0.0D)
1354                    {
1355                        pushX = 0.0D;
1356                        pushZ = 0.0D;
1357                    }
1358                    else
1359                    {
1360                        pushX = motionX;
1361                        pushZ = motionZ;
1362                    }
1363                }
1364            }
1365        }
1366    
1367        /**
1368         * Moved to allow overrides.
1369         * This code handles minecart movement and speed capping when on a rail.
1370         */
1371        protected void moveMinecartOnRail(int i, int j, int k)
1372        {
1373            int id = worldObj.getBlockId(i, j, k);
1374            if (!BlockRail.isRailBlock(id))
1375            {
1376                    return;
1377            }
1378            float railMaxSpeed = ((BlockRail)Block.blocksList[id]).getRailMaxSpeed(worldObj, this, i, j, k);
1379    
1380            double maxSpeed = Math.min(railMaxSpeed, getMaxSpeedRail());
1381            double mX = motionX;
1382            double mZ = motionZ;
1383            if(riddenByEntity != null)
1384            {
1385                mX *= 0.75D;
1386                mZ *= 0.75D;
1387            }
1388            if(mX < -maxSpeed) mX = -maxSpeed;
1389            if(mX >  maxSpeed) mX =  maxSpeed;
1390            if(mZ < -maxSpeed) mZ = -maxSpeed;
1391            if(mZ >  maxSpeed) mZ =  maxSpeed;
1392            moveEntity(mX, 0.0D, mZ);
1393        }
1394    
1395        /**
1396         * Moved to allow overrides.
1397         * This code handles minecart movement and speed capping when not on a rail.
1398         */
1399        protected void moveMinecartOffRail(int i, int j, int k)
1400        {
1401            double d2 = getMaxSpeedGround();
1402            if(!onGround)
1403            {
1404                d2 = getMaxSpeedAirLateral();
1405            }
1406            if(motionX < -d2) motionX = -d2;
1407            if(motionX >  d2) motionX =  d2;
1408            if(motionZ < -d2) motionZ = -d2;
1409            if(motionZ >  d2) motionZ =  d2;
1410            double moveY = motionY;
1411            if(getMaxSpeedAirVertical() > 0 && motionY > getMaxSpeedAirVertical())
1412            {
1413                moveY = getMaxSpeedAirVertical();
1414                if(Math.abs(motionX) < 0.3f && Math.abs(motionZ) < 0.3f)
1415                {
1416                    moveY = 0.15f;
1417                    motionY = moveY;
1418                }
1419            }
1420            if(onGround)
1421            {
1422                motionX *= 0.5D;
1423                motionY *= 0.5D;
1424                motionZ *= 0.5D;
1425            }
1426            moveEntity(motionX, moveY, motionZ);
1427            if(!onGround)
1428            {
1429                motionX *= getDragAir();
1430                motionY *= getDragAir();
1431                motionZ *= getDragAir();
1432            }
1433        }
1434    
1435        /**
1436         * Moved to allow overrides.
1437         * This code applies fuel consumption.
1438         */
1439        protected void updateFuel()
1440        {
1441            if (fuel > 0) fuel--;
1442            if (fuel <= 0) pushX = pushZ = 0.0D;
1443            setMinecartPowered(fuel > 0);
1444        }
1445    
1446        /**
1447         * Moved to allow overrides, This code handle slopes affecting velocity.
1448         * @param metadata The blocks position metadata 
1449         */
1450        protected void adjustSlopeVelocities(int metadata) 
1451        {
1452            double acceleration = 0.0078125D;
1453            if (metadata == 2)
1454            {
1455                motionX -= acceleration;
1456            }
1457            else if (metadata == 3)
1458            {
1459                motionX += acceleration;
1460            }
1461            else if (metadata == 4)
1462            {
1463                motionZ += acceleration;
1464            }
1465            else if (metadata == 5)
1466            {
1467                motionZ -= acceleration;
1468            }
1469        }
1470    
1471        /**
1472         * Getters/setters for physics variables
1473         */
1474    
1475        /**
1476         * Returns the carts max speed.
1477         * Carts going faster than 1.1 cause issues with chunk loading.
1478         * Carts cant traverse slopes or corners at greater than 0.5 - 0.6.
1479         * This value is compared with the rails max speed to determine
1480         * the carts current max speed. A normal rails max speed is 0.4.
1481         * @return Carts max speed.
1482         */
1483        public float getMaxSpeedRail()
1484        {
1485            return maxSpeedRail;
1486        }
1487    
1488        public void setMaxSpeedRail(float value)
1489        {
1490            maxSpeedRail = value;
1491        }
1492    
1493        public float getMaxSpeedGround()
1494        {
1495            return maxSpeedGround;
1496        }
1497    
1498        public void setMaxSpeedGround(float value)
1499        {
1500            maxSpeedGround = value;
1501        }
1502    
1503        public float getMaxSpeedAirLateral()
1504        {
1505            return maxSpeedAirLateral;
1506        }
1507    
1508        public void setMaxSpeedAirLateral(float value)
1509        {
1510            maxSpeedAirLateral = value;
1511        }
1512    
1513        public float getMaxSpeedAirVertical()
1514        {
1515            return maxSpeedAirVertical;
1516        }
1517    
1518        public void setMaxSpeedAirVertical(float value)
1519        {
1520            maxSpeedAirVertical = value;
1521        }
1522    
1523        public double getDragAir()
1524        {
1525            return dragAir;
1526        }
1527    
1528        public void setDragAir(double value)
1529        {
1530            dragAir = value;
1531        }
1532    }