001 package net.minecraft.entity.item;
002
003 import cpw.mods.fml.relauncher.Side;
004 import cpw.mods.fml.relauncher.SideOnly;
005
006 import java.util.ArrayList;
007 import java.util.List;
008 import net.minecraft.block.Block;
009 import net.minecraft.block.BlockRail;
010 import net.minecraft.entity.Entity;
011 import net.minecraft.entity.EntityLiving;
012 import net.minecraft.entity.monster.EntityIronGolem;
013 import net.minecraft.entity.player.EntityPlayer;
014 import net.minecraft.inventory.IInventory;
015 import net.minecraft.item.Item;
016 import net.minecraft.item.ItemStack;
017 import net.minecraft.nbt.NBTTagCompound;
018 import net.minecraft.nbt.NBTTagList;
019 import net.minecraft.server.MinecraftServer;
020 import net.minecraft.server.gui.IUpdatePlayerListBox;
021 import net.minecraft.util.AxisAlignedBB;
022 import net.minecraft.util.DamageSource;
023 import net.minecraft.util.MathHelper;
024 import net.minecraft.util.Vec3;
025 import net.minecraft.world.World;
026 import net.minecraft.world.WorldServer;
027
028 import net.minecraftforge.common.IMinecartCollisionHandler;
029 import net.minecraftforge.common.MinecartRegistry;
030 import net.minecraftforge.common.MinecraftForge;
031 import net.minecraftforge.event.entity.minecart.*;
032
033 public class EntityMinecart extends Entity implements IInventory
034 {
035 /** Array of item stacks stored in minecart (for storage minecarts). */
036 protected ItemStack[] cargoItems;
037 protected int fuel;
038 protected boolean field_70499_f;
039
040 /** The type of minecart, 2 for powered, 1 for storage. */
041 public int minecartType;
042 public double pushX;
043 public double pushZ;
044 protected final IUpdatePlayerListBox field_82344_g;
045 protected boolean field_82345_h;
046
047 /** Minecart rotational logic matrix */
048 protected static final int[][][] matrix = new int[][][] {{{0, 0, -1}, {0, 0, 1}}, {{ -1, 0, 0}, {1, 0, 0}}, {{ -1, -1, 0}, {1, 0, 0}}, {{ -1, 0, 0}, {1, -1, 0}}, {{0, 0, -1}, {0, -1, 1}}, {{0, -1, -1}, {0, 0, 1}}, {{0, 0, 1}, {1, 0, 0}}, {{0, 0, 1}, { -1, 0, 0}}, {{0, 0, -1}, { -1, 0, 0}}, {{0, 0, -1}, {1, 0, 0}}};
049
050 /** appears to be the progress of the turn */
051 protected int turnProgress;
052 protected double minecartX;
053 protected double minecartY;
054 protected double minecartZ;
055 protected double minecartYaw;
056 protected double minecartPitch;
057 @SideOnly(Side.CLIENT)
058 protected double velocityX;
059 @SideOnly(Side.CLIENT)
060 protected double velocityY;
061 @SideOnly(Side.CLIENT)
062 protected double velocityZ;
063
064 /* Forge: Minecart Compatibility Layer Integration. */
065 public static float defaultMaxSpeedRail = 0.4f;
066 public static float defaultMaxSpeedGround = 0.4f;
067 public static float defaultMaxSpeedAirLateral = 0.4f;
068 public static float defaultMaxSpeedAirVertical = -1f;
069 public static double defaultDragRidden = 0.996999979019165D;
070 public static double defaultDragEmpty = 0.9599999785423279D;
071 public static double defaultDragAir = 0.94999998807907104D;
072 protected boolean canUseRail = true;
073 protected boolean canBePushed = true;
074 private static IMinecartCollisionHandler collisionHandler = null;
075
076 /* Instance versions of the above physics properties */
077 protected float maxSpeedRail;
078 protected float maxSpeedGround;
079 protected float maxSpeedAirLateral;
080 protected float maxSpeedAirVertical;
081 protected double dragAir;
082
083 public EntityMinecart(World par1World)
084 {
085 super(par1World);
086 this.cargoItems = new ItemStack[36];
087 this.fuel = 0;
088 this.field_70499_f = false;
089 this.field_82345_h = true;
090 this.preventEntitySpawning = true;
091 this.setSize(0.98F, 0.7F);
092 this.yOffset = this.height / 2.0F;
093 this.field_82344_g = par1World != null ? par1World.func_82735_a(this) : null;
094
095 maxSpeedRail = defaultMaxSpeedRail;
096 maxSpeedGround = defaultMaxSpeedGround;
097 maxSpeedAirLateral = defaultMaxSpeedAirLateral;
098 maxSpeedAirVertical = defaultMaxSpeedAirVertical;
099 dragAir = defaultDragAir;
100 }
101
102 public EntityMinecart(World world, int type)
103 {
104 this(world);
105 minecartType = type;
106 }
107
108 /**
109 * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
110 * prevent them from trampling crops
111 */
112 protected boolean canTriggerWalking()
113 {
114 return false;
115 }
116
117 protected void entityInit()
118 {
119 this.dataWatcher.addObject(16, new Byte((byte)0));
120 this.dataWatcher.addObject(17, new Integer(0));
121 this.dataWatcher.addObject(18, new Integer(1));
122 this.dataWatcher.addObject(19, new Integer(0));
123 }
124
125 /**
126 * Returns a boundingBox used to collide the entity with other entities and blocks. This enables the entity to be
127 * pushable on contact, like boats or minecarts.
128 */
129 public AxisAlignedBB getCollisionBox(Entity par1Entity)
130 {
131 if (getCollisionHandler() != null)
132 {
133 return getCollisionHandler().getCollisionBox(this, par1Entity);
134 }
135 return par1Entity.canBePushed() ? par1Entity.boundingBox : null;
136 }
137
138 /**
139 * returns the bounding box for this entity
140 */
141 public AxisAlignedBB getBoundingBox()
142 {
143 if (getCollisionHandler() != null)
144 {
145 return getCollisionHandler().getBoundingBox(this);
146 }
147 return null;
148 }
149
150 /**
151 * Returns true if this entity should push and be pushed by other entities when colliding.
152 */
153 public boolean canBePushed()
154 {
155 return canBePushed;
156 }
157
158 public EntityMinecart(World par1World, double par2, double par4, double par6, int par8)
159 {
160 this(par1World);
161 this.setPosition(par2, par4 + (double)this.yOffset, par6);
162 this.motionX = 0.0D;
163 this.motionY = 0.0D;
164 this.motionZ = 0.0D;
165 this.prevPosX = par2;
166 this.prevPosY = par4;
167 this.prevPosZ = par6;
168 this.minecartType = par8;
169 }
170
171 /**
172 * Returns the Y offset from the entity's position for any entity riding this one.
173 */
174 public double getMountedYOffset()
175 {
176 return (double)this.height * 0.0D - 0.30000001192092896D;
177 }
178
179 /**
180 * Called when the entity is attacked.
181 */
182 public boolean attackEntityFrom(DamageSource par1DamageSource, int par2)
183 {
184 if (!this.worldObj.isRemote && !this.isDead)
185 {
186 if (this.isEntityInvulnerable())
187 {
188 return false;
189 }
190 else
191 {
192 this.func_70494_i(-this.func_70493_k());
193 this.func_70497_h(10);
194 this.setBeenAttacked();
195 this.setDamage(this.getDamage() + par2 * 10);
196
197 if (par1DamageSource.getEntity() instanceof EntityPlayer && ((EntityPlayer)par1DamageSource.getEntity()).capabilities.isCreativeMode)
198 {
199 this.setDamage(100);
200 }
201
202 if (this.getDamage() > 40)
203 {
204 if (this.riddenByEntity != null)
205 {
206 this.riddenByEntity.mountEntity(this);
207 }
208
209 this.setDead();
210 dropCartAsItem();
211 }
212
213 return true;
214 }
215 }
216 else
217 {
218 return true;
219 }
220 }
221
222 @SideOnly(Side.CLIENT)
223
224 /**
225 * Setups the entity to do the hurt animation. Only used by packets in multiplayer.
226 */
227 public void performHurtAnimation()
228 {
229 this.func_70494_i(-this.func_70493_k());
230 this.func_70497_h(10);
231 this.setDamage(this.getDamage() + this.getDamage() * 10);
232 }
233
234 /**
235 * Returns true if other Entities should be prevented from moving through this Entity.
236 */
237 public boolean canBeCollidedWith()
238 {
239 return !this.isDead;
240 }
241
242 /**
243 * Will get destroyed next tick.
244 */
245 public void setDead()
246 {
247 if (this.field_82345_h)
248 {
249 for (int var1 = 0; var1 < this.getSizeInventory(); ++var1)
250 {
251 ItemStack var2 = this.getStackInSlot(var1);
252
253 if (var2 != null)
254 {
255 float var3 = this.rand.nextFloat() * 0.8F + 0.1F;
256 float var4 = this.rand.nextFloat() * 0.8F + 0.1F;
257 float var5 = this.rand.nextFloat() * 0.8F + 0.1F;
258
259 while (var2.stackSize > 0)
260 {
261 int var6 = this.rand.nextInt(21) + 10;
262
263 if (var6 > var2.stackSize)
264 {
265 var6 = var2.stackSize;
266 }
267
268 var2.stackSize -= var6;
269 EntityItem var7 = new EntityItem(this.worldObj, this.posX + (double)var3, this.posY + (double)var4, this.posZ + (double)var5, new ItemStack(var2.itemID, var6, var2.getItemDamage()));
270
271 if (var2.hasTagCompound())
272 {
273 var7.func_92014_d().setTagCompound((NBTTagCompound)var2.getTagCompound().copy());
274 }
275
276 float var8 = 0.05F;
277 var7.motionX = (double)((float)this.rand.nextGaussian() * var8);
278 var7.motionY = (double)((float)this.rand.nextGaussian() * var8 + 0.2F);
279 var7.motionZ = (double)((float)this.rand.nextGaussian() * var8);
280 this.worldObj.spawnEntityInWorld(var7);
281 }
282 }
283 }
284 }
285
286 super.setDead();
287
288 if (this.field_82344_g != null)
289 {
290 this.field_82344_g.update();
291 }
292 }
293
294 /**
295 * Teleports the entity to another dimension. Params: Dimension number to teleport to
296 */
297 public void travelToDimension(int par1)
298 {
299 this.field_82345_h = false;
300 super.travelToDimension(par1);
301 }
302
303 /**
304 * Called to update the entity's position/logic.
305 */
306 public void onUpdate()
307 {
308 if (this.field_82344_g != null)
309 {
310 this.field_82344_g.update();
311 }
312
313 if (this.func_70496_j() > 0)
314 {
315 this.func_70497_h(this.func_70496_j() - 1);
316 }
317
318 if (this.getDamage() > 0)
319 {
320 this.setDamage(this.getDamage() - 1);
321 }
322
323 if (this.posY < -64.0D)
324 {
325 this.kill();
326 }
327
328 if (this.isMinecartPowered() && this.rand.nextInt(4) == 0 && minecartType == 2 && getClass() == EntityMinecart.class)
329 {
330 this.worldObj.spawnParticle("largesmoke", this.posX, this.posY + 0.8D, this.posZ, 0.0D, 0.0D, 0.0D);
331 }
332
333 int var2;
334
335 if (!this.worldObj.isRemote && this.worldObj instanceof WorldServer)
336 {
337 this.worldObj.theProfiler.startSection("portal");
338 MinecraftServer var1 = ((WorldServer)this.worldObj).getMinecraftServer();
339 var2 = this.getMaxInPortalTime();
340
341 if (this.inPortal)
342 {
343 if (var1.getAllowNether())
344 {
345 if (this.ridingEntity == null && this.field_82153_h++ >= var2)
346 {
347 this.field_82153_h = var2;
348 this.timeUntilPortal = this.getPortalCooldown();
349 byte var3;
350
351 if (this.worldObj.provider.dimensionId == -1)
352 {
353 var3 = 0;
354 }
355 else
356 {
357 var3 = -1;
358 }
359
360 this.travelToDimension(var3);
361 }
362
363 this.inPortal = false;
364 }
365 }
366 else
367 {
368 if (this.field_82153_h > 0)
369 {
370 this.field_82153_h -= 4;
371 }
372
373 if (this.field_82153_h < 0)
374 {
375 this.field_82153_h = 0;
376 }
377 }
378
379 if (this.timeUntilPortal > 0)
380 {
381 --this.timeUntilPortal;
382 }
383
384 this.worldObj.theProfiler.endSection();
385 }
386
387 if (this.worldObj.isRemote)
388 {
389 if (this.turnProgress > 0)
390 {
391 double var46 = this.posX + (this.minecartX - this.posX) / (double)this.turnProgress;
392 double var48 = this.posY + (this.minecartY - this.posY) / (double)this.turnProgress;
393 double var5 = this.posZ + (this.minecartZ - this.posZ) / (double)this.turnProgress;
394 double var7 = MathHelper.wrapAngleTo180_double(this.minecartYaw - (double)this.rotationYaw);
395 this.rotationYaw = (float)((double)this.rotationYaw + var7 / (double)this.turnProgress);
396 this.rotationPitch = (float)((double)this.rotationPitch + (this.minecartPitch - (double)this.rotationPitch) / (double)this.turnProgress);
397 --this.turnProgress;
398 this.setPosition(var46, var48, var5);
399 this.setRotation(this.rotationYaw, this.rotationPitch);
400 }
401 else
402 {
403 this.setPosition(this.posX, this.posY, this.posZ);
404 this.setRotation(this.rotationYaw, this.rotationPitch);
405 }
406 }
407 else
408 {
409 this.prevPosX = this.posX;
410 this.prevPosY = this.posY;
411 this.prevPosZ = this.posZ;
412 this.motionY -= 0.03999999910593033D;
413 int var45 = MathHelper.floor_double(this.posX);
414 var2 = MathHelper.floor_double(this.posY);
415 int var47 = MathHelper.floor_double(this.posZ);
416
417 if (BlockRail.isRailBlockAt(this.worldObj, var45, var2 - 1, var47))
418 {
419 --var2;
420 }
421
422 double var4 = 0.4D;
423 double var6 = 0.0078125D;
424 int var8 = this.worldObj.getBlockId(var45, var2, var47);
425
426 if (canUseRail() && BlockRail.isRailBlock(var8))
427 {
428 this.fallDistance = 0.0F;
429 Vec3 var9 = this.func_70489_a(this.posX, this.posY, this.posZ);
430 int var10 = ((BlockRail)Block.blocksList[var8]).getBasicRailMetadata(worldObj, this, var45, var2, var47);
431 this.posY = (double)var2;
432 boolean var11 = false;
433 boolean var12 = false;
434
435 if (var8 == Block.railPowered.blockID)
436 {
437 var11 = (worldObj.getBlockMetadata(var45, var2, var47) & 8) != 0;
438 var12 = !var11;
439 }
440
441 if (((BlockRail)Block.blocksList[var8]).isPowered())
442 {
443 var10 &= 7;
444 }
445
446 if (var10 >= 2 && var10 <= 5)
447 {
448 this.posY = (double)(var2 + 1);
449 }
450
451 adjustSlopeVelocities(var10);
452
453 int[][] var13 = matrix[var10];
454 double var14 = (double)(var13[1][0] - var13[0][0]);
455 double var16 = (double)(var13[1][2] - var13[0][2]);
456 double var18 = Math.sqrt(var14 * var14 + var16 * var16);
457 double var20 = this.motionX * var14 + this.motionZ * var16;
458
459 if (var20 < 0.0D)
460 {
461 var14 = -var14;
462 var16 = -var16;
463 }
464
465 double var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
466 this.motionX = var22 * var14 / var18;
467 this.motionZ = var22 * var16 / var18;
468 double var24;
469 double var26;
470
471 if (this.riddenByEntity != null)
472 {
473 var24 = this.riddenByEntity.motionX * this.riddenByEntity.motionX + this.riddenByEntity.motionZ * this.riddenByEntity.motionZ;
474 var26 = this.motionX * this.motionX + this.motionZ * this.motionZ;
475
476 if (var24 > 1.0E-4D && var26 < 0.01D)
477 {
478 this.motionX += this.riddenByEntity.motionX * 0.1D;
479 this.motionZ += this.riddenByEntity.motionZ * 0.1D;
480 var12 = false;
481 }
482 }
483
484 if (var12 && shouldDoRailFunctions())
485 {
486 var24 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
487
488 if (var24 < 0.03D)
489 {
490 this.motionX *= 0.0D;
491 this.motionY *= 0.0D;
492 this.motionZ *= 0.0D;
493 }
494 else
495 {
496 this.motionX *= 0.5D;
497 this.motionY *= 0.0D;
498 this.motionZ *= 0.5D;
499 }
500 }
501
502 var24 = 0.0D;
503 var26 = (double)var45 + 0.5D + (double)var13[0][0] * 0.5D;
504 double var28 = (double)var47 + 0.5D + (double)var13[0][2] * 0.5D;
505 double var30 = (double)var45 + 0.5D + (double)var13[1][0] * 0.5D;
506 double var32 = (double)var47 + 0.5D + (double)var13[1][2] * 0.5D;
507 var14 = var30 - var26;
508 var16 = var32 - var28;
509 double var34;
510 double var36;
511
512 if (var14 == 0.0D)
513 {
514 this.posX = (double)var45 + 0.5D;
515 var24 = this.posZ - (double)var47;
516 }
517 else if (var16 == 0.0D)
518 {
519 this.posZ = (double)var47 + 0.5D;
520 var24 = this.posX - (double)var45;
521 }
522 else
523 {
524 var34 = this.posX - var26;
525 var36 = this.posZ - var28;
526 var24 = (var34 * var14 + var36 * var16) * 2.0D;
527 }
528
529 this.posX = var26 + var14 * var24;
530 this.posZ = var28 + var16 * var24;
531 this.setPosition(this.posX, this.posY + (double)this.yOffset, this.posZ);
532
533 moveMinecartOnRail(var45, var2, var47);
534
535 if (var13[0][1] != 0 && MathHelper.floor_double(this.posX) - var45 == var13[0][0] && MathHelper.floor_double(this.posZ) - var47 == var13[0][2])
536 {
537 this.setPosition(this.posX, this.posY + (double)var13[0][1], this.posZ);
538 }
539 else if (var13[1][1] != 0 && MathHelper.floor_double(this.posX) - var45 == var13[1][0] && MathHelper.floor_double(this.posZ) - var47 == var13[1][2])
540 {
541 this.setPosition(this.posX, this.posY + (double)var13[1][1], this.posZ);
542 }
543
544 applyDragAndPushForces();
545
546 Vec3 var54 = this.func_70489_a(this.posX, this.posY, this.posZ);
547
548 if (var54 != null && var9 != null)
549 {
550 double var39 = (var9.yCoord - var54.yCoord) * 0.05D;
551 var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
552
553 if (var22 > 0.0D)
554 {
555 this.motionX = this.motionX / var22 * (var22 + var39);
556 this.motionZ = this.motionZ / var22 * (var22 + var39);
557 }
558
559 this.setPosition(this.posX, var54.yCoord, this.posZ);
560 }
561
562 int var53 = MathHelper.floor_double(this.posX);
563 int var55 = MathHelper.floor_double(this.posZ);
564
565 if (var53 != var45 || var55 != var47)
566 {
567 var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
568 this.motionX = var22 * (double)(var53 - var45);
569 this.motionZ = var22 * (double)(var55 - var47);
570 }
571
572 double var41;
573
574 updatePushForces();
575
576 if(shouldDoRailFunctions())
577 {
578 ((BlockRail)Block.blocksList[var8]).onMinecartPass(worldObj, this, var45, var2, var47);
579 }
580
581 if (var11 && shouldDoRailFunctions())
582 {
583 var41 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
584
585 if (var41 > 0.01D)
586 {
587 double var43 = 0.06D;
588 this.motionX += this.motionX / var41 * var43;
589 this.motionZ += this.motionZ / var41 * var43;
590 }
591 else if (var10 == 1)
592 {
593 if (this.worldObj.isBlockNormalCube(var45 - 1, var2, var47))
594 {
595 this.motionX = 0.02D;
596 }
597 else if (this.worldObj.isBlockNormalCube(var45 + 1, var2, var47))
598 {
599 this.motionX = -0.02D;
600 }
601 }
602 else if (var10 == 0)
603 {
604 if (this.worldObj.isBlockNormalCube(var45, var2, var47 - 1))
605 {
606 this.motionZ = 0.02D;
607 }
608 else if (this.worldObj.isBlockNormalCube(var45, var2, var47 + 1))
609 {
610 this.motionZ = -0.02D;
611 }
612 }
613 }
614 }
615 else
616 {
617 moveMinecartOffRail(var45, var2, var47);
618 }
619
620 this.doBlockCollisions();
621 this.rotationPitch = 0.0F;
622 double var49 = this.prevPosX - this.posX;
623 double var50 = this.prevPosZ - this.posZ;
624
625 if (var49 * var49 + var50 * var50 > 0.001D)
626 {
627 this.rotationYaw = (float)(Math.atan2(var50, var49) * 180.0D / Math.PI);
628
629 if (this.field_70499_f)
630 {
631 this.rotationYaw += 180.0F;
632 }
633 }
634
635 double var51 = (double)MathHelper.wrapAngleTo180_float(this.rotationYaw - this.prevRotationYaw);
636
637 if (var51 < -170.0D || var51 >= 170.0D)
638 {
639 this.rotationYaw += 180.0F;
640 this.field_70499_f = !this.field_70499_f;
641 }
642
643 this.setRotation(this.rotationYaw, this.rotationPitch);
644
645 AxisAlignedBB box = null;
646 if (getCollisionHandler() != null)
647 {
648 box = getCollisionHandler().getMinecartCollisionBox(this);
649 }
650 else
651 {
652 box = boundingBox.expand(0.2D, 0.0D, 0.2D);
653 }
654
655 List var15 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, box);
656
657 if (var15 != null && !var15.isEmpty())
658 {
659 for (int var52 = 0; var52 < var15.size(); ++var52)
660 {
661 Entity var17 = (Entity)var15.get(var52);
662
663 if (var17 != this.riddenByEntity && var17.canBePushed() && var17 instanceof EntityMinecart)
664 {
665 var17.applyEntityCollision(this);
666 }
667 }
668 }
669
670 if (this.riddenByEntity != null && this.riddenByEntity.isDead)
671 {
672 if (this.riddenByEntity.ridingEntity == this)
673 {
674 this.riddenByEntity.ridingEntity = null;
675 }
676
677 this.riddenByEntity = null;
678 }
679
680 updateFuel();
681 MinecraftForge.EVENT_BUS.post(new MinecartUpdateEvent(this, var45, var2, var47));
682 }
683 }
684
685 @SideOnly(Side.CLIENT)
686 public Vec3 func_70495_a(double par1, double par3, double par5, double par7)
687 {
688 int var9 = MathHelper.floor_double(par1);
689 int var10 = MathHelper.floor_double(par3);
690 int var11 = MathHelper.floor_double(par5);
691
692 if (BlockRail.isRailBlockAt(this.worldObj, var9, var10 - 1, var11))
693 {
694 --var10;
695 }
696
697 int var12 = this.worldObj.getBlockId(var9, var10, var11);
698
699 if (!BlockRail.isRailBlock(var12))
700 {
701 return null;
702 }
703 else
704 {
705 int var13 = ((BlockRail)Block.blocksList[var12]).getBasicRailMetadata(worldObj, this, var9, var10, var11);
706
707 par3 = (double)var10;
708
709 if (var13 >= 2 && var13 <= 5)
710 {
711 par3 = (double)(var10 + 1);
712 }
713
714 int[][] var14 = matrix[var13];
715 double var15 = (double)(var14[1][0] - var14[0][0]);
716 double var17 = (double)(var14[1][2] - var14[0][2]);
717 double var19 = Math.sqrt(var15 * var15 + var17 * var17);
718 var15 /= var19;
719 var17 /= var19;
720 par1 += var15 * par7;
721 par5 += var17 * par7;
722
723 if (var14[0][1] != 0 && MathHelper.floor_double(par1) - var9 == var14[0][0] && MathHelper.floor_double(par5) - var11 == var14[0][2])
724 {
725 par3 += (double)var14[0][1];
726 }
727 else if (var14[1][1] != 0 && MathHelper.floor_double(par1) - var9 == var14[1][0] && MathHelper.floor_double(par5) - var11 == var14[1][2])
728 {
729 par3 += (double)var14[1][1];
730 }
731
732 return this.func_70489_a(par1, par3, par5);
733 }
734 }
735
736 public Vec3 func_70489_a(double par1, double par3, double par5)
737 {
738 int var7 = MathHelper.floor_double(par1);
739 int var8 = MathHelper.floor_double(par3);
740 int var9 = MathHelper.floor_double(par5);
741
742 if (BlockRail.isRailBlockAt(this.worldObj, var7, var8 - 1, var9))
743 {
744 --var8;
745 }
746
747 int var10 = this.worldObj.getBlockId(var7, var8, var9);
748
749 if (BlockRail.isRailBlock(var10))
750 {
751 int var11 = ((BlockRail)Block.blocksList[var10]).getBasicRailMetadata(worldObj, this, var7, var8, var9);
752 par3 = (double)var8;
753
754 if (var11 >= 2 && var11 <= 5)
755 {
756 par3 = (double)(var8 + 1);
757 }
758
759 int[][] var12 = matrix[var11];
760 double var13 = 0.0D;
761 double var15 = (double)var7 + 0.5D + (double)var12[0][0] * 0.5D;
762 double var17 = (double)var8 + 0.5D + (double)var12[0][1] * 0.5D;
763 double var19 = (double)var9 + 0.5D + (double)var12[0][2] * 0.5D;
764 double var21 = (double)var7 + 0.5D + (double)var12[1][0] * 0.5D;
765 double var23 = (double)var8 + 0.5D + (double)var12[1][1] * 0.5D;
766 double var25 = (double)var9 + 0.5D + (double)var12[1][2] * 0.5D;
767 double var27 = var21 - var15;
768 double var29 = (var23 - var17) * 2.0D;
769 double var31 = var25 - var19;
770
771 if (var27 == 0.0D)
772 {
773 par1 = (double)var7 + 0.5D;
774 var13 = par5 - (double)var9;
775 }
776 else if (var31 == 0.0D)
777 {
778 par5 = (double)var9 + 0.5D;
779 var13 = par1 - (double)var7;
780 }
781 else
782 {
783 double var33 = par1 - var15;
784 double var35 = par5 - var19;
785 var13 = (var33 * var27 + var35 * var31) * 2.0D;
786 }
787
788 par1 = var15 + var27 * var13;
789 par3 = var17 + var29 * var13;
790 par5 = var19 + var31 * var13;
791
792 if (var29 < 0.0D)
793 {
794 ++par3;
795 }
796
797 if (var29 > 0.0D)
798 {
799 par3 += 0.5D;
800 }
801
802 return this.worldObj.getWorldVec3Pool().getVecFromPool(par1, par3, par5);
803 }
804 else
805 {
806 return null;
807 }
808 }
809
810 /**
811 * (abstract) Protected helper method to write subclass entity data to NBT.
812 */
813 protected void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
814 {
815 par1NBTTagCompound.setInteger("Type", this.minecartType);
816
817 if (isPoweredCart())
818 {
819 par1NBTTagCompound.setDouble("PushX", this.pushX);
820 par1NBTTagCompound.setDouble("PushZ", this.pushZ);
821 par1NBTTagCompound.setInteger("Fuel", this.fuel);
822 }
823
824 if (getSizeInventory() > 0)
825 {
826 NBTTagList var2 = new NBTTagList();
827
828 for (int var3 = 0; var3 < this.cargoItems.length; ++var3)
829 {
830 if (this.cargoItems[var3] != null)
831 {
832 NBTTagCompound var4 = new NBTTagCompound();
833 var4.setByte("Slot", (byte)var3);
834 this.cargoItems[var3].writeToNBT(var4);
835 var2.appendTag(var4);
836 }
837 }
838
839 par1NBTTagCompound.setTag("Items", var2);
840 }
841 }
842
843 /**
844 * (abstract) Protected helper method to read subclass entity data from NBT.
845 */
846 protected void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
847 {
848 this.minecartType = par1NBTTagCompound.getInteger("Type");
849
850 if (isPoweredCart())
851 {
852 this.pushX = par1NBTTagCompound.getDouble("PushX");
853 this.pushZ = par1NBTTagCompound.getDouble("PushZ");
854 try
855 {
856 this.fuel = par1NBTTagCompound.getInteger("Fuel");
857 }
858 catch (ClassCastException e)
859 {
860 this.fuel = par1NBTTagCompound.getShort("Fuel");
861 }
862 }
863
864 if (getSizeInventory() > 0)
865 {
866 NBTTagList var2 = par1NBTTagCompound.getTagList("Items");
867 this.cargoItems = new ItemStack[this.getSizeInventory()];
868
869 for (int var3 = 0; var3 < var2.tagCount(); ++var3)
870 {
871 NBTTagCompound var4 = (NBTTagCompound)var2.tagAt(var3);
872 int var5 = var4.getByte("Slot") & 255;
873
874 if (var5 >= 0 && var5 < this.cargoItems.length)
875 {
876 this.cargoItems[var5] = ItemStack.loadItemStackFromNBT(var4);
877 }
878 }
879 }
880 }
881
882 @SideOnly(Side.CLIENT)
883 public float getShadowSize()
884 {
885 return 0.0F;
886 }
887
888 /**
889 * Applies a velocity to each of the entities pushing them away from each other. Args: entity
890 */
891 public void applyEntityCollision(Entity par1Entity)
892 {
893 MinecraftForge.EVENT_BUS.post(new MinecartCollisionEvent(this, par1Entity));
894 if (getCollisionHandler() != null)
895 {
896 getCollisionHandler().onEntityCollision(this, par1Entity);
897 return;
898 }
899 if (!this.worldObj.isRemote)
900 {
901 if (par1Entity != this.riddenByEntity)
902 {
903 if (par1Entity instanceof EntityLiving && !(par1Entity instanceof EntityPlayer) && !(par1Entity instanceof EntityIronGolem) && canBeRidden() && this.motionX * this.motionX + this.motionZ * this.motionZ > 0.01D && this.riddenByEntity == null && par1Entity.ridingEntity == null)
904 {
905 par1Entity.mountEntity(this);
906 }
907
908 double var2 = par1Entity.posX - this.posX;
909 double var4 = par1Entity.posZ - this.posZ;
910 double var6 = var2 * var2 + var4 * var4;
911
912 if (var6 >= 9.999999747378752E-5D)
913 {
914 var6 = (double)MathHelper.sqrt_double(var6);
915 var2 /= var6;
916 var4 /= var6;
917 double var8 = 1.0D / var6;
918
919 if (var8 > 1.0D)
920 {
921 var8 = 1.0D;
922 }
923
924 var2 *= var8;
925 var4 *= var8;
926 var2 *= 0.10000000149011612D;
927 var4 *= 0.10000000149011612D;
928 var2 *= (double)(1.0F - this.entityCollisionReduction);
929 var4 *= (double)(1.0F - this.entityCollisionReduction);
930 var2 *= 0.5D;
931 var4 *= 0.5D;
932
933 if (par1Entity instanceof EntityMinecart)
934 {
935 double var10 = par1Entity.posX - this.posX;
936 double var12 = par1Entity.posZ - this.posZ;
937 Vec3 var14 = this.worldObj.getWorldVec3Pool().getVecFromPool(var10, 0.0D, var12).normalize();
938 Vec3 var15 = this.worldObj.getWorldVec3Pool().getVecFromPool((double)MathHelper.cos(this.rotationYaw * (float)Math.PI / 180.0F), 0.0D, (double)MathHelper.sin(this.rotationYaw * (float)Math.PI / 180.0F)).normalize();
939 double var16 = Math.abs(var14.dotProduct(var15));
940
941 if (var16 < 0.800000011920929D)
942 {
943 return;
944 }
945
946 double var18 = par1Entity.motionX + this.motionX;
947 double var20 = par1Entity.motionZ + this.motionZ;
948
949 if (((EntityMinecart)par1Entity).isPoweredCart() && !isPoweredCart())
950 {
951 this.motionX *= 0.20000000298023224D;
952 this.motionZ *= 0.20000000298023224D;
953 this.addVelocity(par1Entity.motionX - var2, 0.0D, par1Entity.motionZ - var4);
954 par1Entity.motionX *= 0.949999988079071D;
955 par1Entity.motionZ *= 0.949999988079071D;
956 }
957 else if (!((EntityMinecart)par1Entity).isPoweredCart() && isPoweredCart())
958 {
959 par1Entity.motionX *= 0.20000000298023224D;
960 par1Entity.motionZ *= 0.20000000298023224D;
961 par1Entity.addVelocity(this.motionX + var2, 0.0D, this.motionZ + var4);
962 this.motionX *= 0.949999988079071D;
963 this.motionZ *= 0.949999988079071D;
964 }
965 else
966 {
967 var18 /= 2.0D;
968 var20 /= 2.0D;
969 this.motionX *= 0.20000000298023224D;
970 this.motionZ *= 0.20000000298023224D;
971 this.addVelocity(var18 - var2, 0.0D, var20 - var4);
972 par1Entity.motionX *= 0.20000000298023224D;
973 par1Entity.motionZ *= 0.20000000298023224D;
974 par1Entity.addVelocity(var18 + var2, 0.0D, var20 + var4);
975 }
976 }
977 else
978 {
979 this.addVelocity(-var2, 0.0D, -var4);
980 par1Entity.addVelocity(var2 / 4.0D, 0.0D, var4 / 4.0D);
981 }
982 }
983 }
984 }
985 }
986
987 /**
988 * Returns the number of slots in the inventory.
989 */
990 public int getSizeInventory()
991 {
992 return (minecartType == 1 && getClass() == EntityMinecart.class ? 27 : 0);
993 }
994
995 /**
996 * Returns the stack in slot i
997 */
998 public ItemStack getStackInSlot(int par1)
999 {
1000 return this.cargoItems[par1];
1001 }
1002
1003 /**
1004 * Removes from an inventory slot (first arg) up to a specified number (second arg) of items and returns them in a
1005 * new stack.
1006 */
1007 public ItemStack decrStackSize(int par1, int par2)
1008 {
1009 if (this.cargoItems[par1] != null)
1010 {
1011 ItemStack var3;
1012
1013 if (this.cargoItems[par1].stackSize <= par2)
1014 {
1015 var3 = this.cargoItems[par1];
1016 this.cargoItems[par1] = null;
1017 return var3;
1018 }
1019 else
1020 {
1021 var3 = this.cargoItems[par1].splitStack(par2);
1022
1023 if (this.cargoItems[par1].stackSize == 0)
1024 {
1025 this.cargoItems[par1] = null;
1026 }
1027
1028 return var3;
1029 }
1030 }
1031 else
1032 {
1033 return null;
1034 }
1035 }
1036
1037 /**
1038 * When some containers are closed they call this on each slot, then drop whatever it returns as an EntityItem -
1039 * like when you close a workbench GUI.
1040 */
1041 public ItemStack getStackInSlotOnClosing(int par1)
1042 {
1043 if (this.cargoItems[par1] != null)
1044 {
1045 ItemStack var2 = this.cargoItems[par1];
1046 this.cargoItems[par1] = null;
1047 return var2;
1048 }
1049 else
1050 {
1051 return null;
1052 }
1053 }
1054
1055 /**
1056 * Sets the given item stack to the specified slot in the inventory (can be crafting or armor sections).
1057 */
1058 public void setInventorySlotContents(int par1, ItemStack par2ItemStack)
1059 {
1060 this.cargoItems[par1] = par2ItemStack;
1061
1062 if (par2ItemStack != null && par2ItemStack.stackSize > this.getInventoryStackLimit())
1063 {
1064 par2ItemStack.stackSize = this.getInventoryStackLimit();
1065 }
1066 }
1067
1068 /**
1069 * Returns the name of the inventory.
1070 */
1071 public String getInvName()
1072 {
1073 return "container.minecart";
1074 }
1075
1076 /**
1077 * Returns the maximum stack size for a inventory slot. Seems to always be 64, possibly will be extended. *Isn't
1078 * this more of a set than a get?*
1079 */
1080 public int getInventoryStackLimit()
1081 {
1082 return 64;
1083 }
1084
1085 /**
1086 * Called when an the contents of an Inventory change, usually
1087 */
1088 public void onInventoryChanged() {}
1089
1090 /**
1091 * Called when a player interacts with a mob. e.g. gets milk from a cow, gets into the saddle on a pig.
1092 */
1093 public boolean interact(EntityPlayer par1EntityPlayer)
1094 {
1095 if (MinecraftForge.EVENT_BUS.post(new MinecartInteractEvent(this, par1EntityPlayer)))
1096 {
1097 return true;
1098 }
1099
1100 if (canBeRidden())
1101 {
1102 if (this.riddenByEntity != null && this.riddenByEntity instanceof EntityPlayer && this.riddenByEntity != par1EntityPlayer)
1103 {
1104 return true;
1105 }
1106
1107 if (!this.worldObj.isRemote)
1108 {
1109 par1EntityPlayer.mountEntity(this);
1110 }
1111 }
1112 else if (getSizeInventory() > 0)
1113 {
1114 if (!this.worldObj.isRemote)
1115 {
1116 par1EntityPlayer.displayGUIChest(this);
1117 }
1118 }
1119 else if (this.minecartType == 2 && getClass() == EntityMinecart.class)
1120 {
1121 ItemStack var2 = par1EntityPlayer.inventory.getCurrentItem();
1122
1123 if (var2 != null && var2.itemID == Item.coal.itemID)
1124 {
1125 if (--var2.stackSize == 0)
1126 {
1127 par1EntityPlayer.inventory.setInventorySlotContents(par1EntityPlayer.inventory.currentItem, (ItemStack)null);
1128 }
1129
1130 this.fuel += 3600;
1131 }
1132
1133 this.pushX = this.posX - par1EntityPlayer.posX;
1134 this.pushZ = this.posZ - par1EntityPlayer.posZ;
1135 }
1136
1137 return true;
1138 }
1139
1140 @SideOnly(Side.CLIENT)
1141
1142 /**
1143 * Sets the position and rotation. Only difference from the other one is no bounding on the rotation. Args: posX,
1144 * posY, posZ, yaw, pitch
1145 */
1146 public void setPositionAndRotation2(double par1, double par3, double par5, float par7, float par8, int par9)
1147 {
1148 this.minecartX = par1;
1149 this.minecartY = par3;
1150 this.minecartZ = par5;
1151 this.minecartYaw = (double)par7;
1152 this.minecartPitch = (double)par8;
1153 this.turnProgress = par9 + 2;
1154 this.motionX = this.velocityX;
1155 this.motionY = this.velocityY;
1156 this.motionZ = this.velocityZ;
1157 }
1158
1159 @SideOnly(Side.CLIENT)
1160
1161 /**
1162 * Sets the velocity to the args. Args: x, y, z
1163 */
1164 public void setVelocity(double par1, double par3, double par5)
1165 {
1166 this.velocityX = this.motionX = par1;
1167 this.velocityY = this.motionY = par3;
1168 this.velocityZ = this.motionZ = par5;
1169 }
1170
1171 /**
1172 * Do not make give this method the name canInteractWith because it clashes with Container
1173 */
1174 public boolean isUseableByPlayer(EntityPlayer par1EntityPlayer)
1175 {
1176 return this.isDead ? false : par1EntityPlayer.getDistanceSqToEntity(this) <= 64.0D;
1177 }
1178
1179 /**
1180 * Is this minecart powered (Fuel > 0)
1181 */
1182 public boolean isMinecartPowered()
1183 {
1184 return (this.dataWatcher.getWatchableObjectByte(16) & 1) != 0;
1185 }
1186
1187 /**
1188 * Set if this minecart is powered (Fuel > 0)
1189 */
1190 protected void setMinecartPowered(boolean par1)
1191 {
1192 if (par1)
1193 {
1194 this.dataWatcher.updateObject(16, Byte.valueOf((byte)(this.dataWatcher.getWatchableObjectByte(16) | 1)));
1195 }
1196 else
1197 {
1198 this.dataWatcher.updateObject(16, Byte.valueOf((byte)(this.dataWatcher.getWatchableObjectByte(16) & -2)));
1199 }
1200 }
1201
1202 public void openChest() {}
1203
1204 public void closeChest() {}
1205
1206 /**
1207 * Sets the current amount of damage the minecart has taken. Decreases over time. The cart breaks when this is over
1208 * 40.
1209 */
1210 public void setDamage(int par1)
1211 {
1212 this.dataWatcher.updateObject(19, Integer.valueOf(par1));
1213 }
1214
1215 /**
1216 * Gets the current amount of damage the minecart has taken. Decreases over time. The cart breaks when this is over
1217 * 40.
1218 */
1219 public int getDamage()
1220 {
1221 return this.dataWatcher.getWatchableObjectInt(19);
1222 }
1223
1224 public void func_70497_h(int par1)
1225 {
1226 this.dataWatcher.updateObject(17, Integer.valueOf(par1));
1227 }
1228
1229 public int func_70496_j()
1230 {
1231 return this.dataWatcher.getWatchableObjectInt(17);
1232 }
1233
1234 public void func_70494_i(int par1)
1235 {
1236 this.dataWatcher.updateObject(18, Integer.valueOf(par1));
1237 }
1238
1239 public int func_70493_k()
1240 {
1241 return this.dataWatcher.getWatchableObjectInt(18);
1242 }
1243
1244 /**
1245 * Drops the cart as a item. The exact item dropped is defined by getItemDropped().
1246 */
1247 public void dropCartAsItem()
1248 {
1249 for(ItemStack item : getItemsDropped())
1250 {
1251 entityDropItem(item, 0);
1252 }
1253 }
1254
1255 /**
1256 * Override this to define which items your cart drops when broken.
1257 * This does not include items contained in the inventory,
1258 * that is handled elsewhere.
1259 * @return A list of items dropped.
1260 */
1261 public List<ItemStack> getItemsDropped()
1262 {
1263 List<ItemStack> items = new ArrayList<ItemStack>();
1264 items.add(new ItemStack(Item.minecartEmpty));
1265
1266 switch(minecartType)
1267 {
1268 case 1:
1269 items.add(new ItemStack(Block.chest));
1270 break;
1271 case 2:
1272 items.add(new ItemStack(Block.stoneOvenIdle));
1273 break;
1274 }
1275 return items;
1276 }
1277
1278 /**
1279 * This function returns an ItemStack that represents this cart.
1280 * This should be an ItemStack that can be used by the player to place the cart.
1281 * This is the item that was registered with the cart via the registerMinecart function,
1282 * but is not necessary the item the cart drops when destroyed.
1283 * @return An ItemStack that can be used to place the cart.
1284 */
1285 public ItemStack getCartItem()
1286 {
1287 return MinecartRegistry.getItemForCart(this);
1288 }
1289
1290 /**
1291 * Returns true if this cart is self propelled.
1292 * @return True if powered.
1293 */
1294 public boolean isPoweredCart()
1295 {
1296 return minecartType == 2 && getClass() == EntityMinecart.class;
1297 }
1298
1299 /**
1300 * Returns true if this cart is a storage cart
1301 * Some carts may have inventories but not be storage carts
1302 * and some carts without inventories may be storage carts.
1303 * @return True if this cart should be classified as a storage cart.
1304 */
1305 public boolean isStorageCart()
1306 {
1307 return minecartType == 1 && getClass() == EntityMinecart.class;
1308 }
1309
1310 /**
1311 * Returns true if this cart can be ridden by an Entity.
1312 * @return True if this cart can be ridden.
1313 */
1314 public boolean canBeRidden()
1315 {
1316 if(minecartType == 0 && getClass() == EntityMinecart.class)
1317 {
1318 return true;
1319 }
1320 return false;
1321 }
1322
1323 /**
1324 * Returns true if this cart can currently use rails.
1325 * This function is mainly used to gracefully detach a minecart from a rail.
1326 * @return True if the minecart can use rails.
1327 */
1328 public boolean canUseRail()
1329 {
1330 return canUseRail;
1331 }
1332
1333 /**
1334 * Set whether the minecart can use rails.
1335 * This function is mainly used to gracefully detach a minecart from a rail.
1336 * @param use Whether the minecart can currently use rails.
1337 */
1338 public void setCanUseRail(boolean use)
1339 {
1340 canUseRail = use;
1341 }
1342
1343 /**
1344 * Return false if this cart should not call IRail.onMinecartPass() and should ignore Powered Rails.
1345 * @return True if this cart should call IRail.onMinecartPass().
1346 */
1347 public boolean shouldDoRailFunctions()
1348 {
1349 return true;
1350 }
1351
1352 /**
1353 * Simply returns the minecartType variable.
1354 * @return minecartType
1355 */
1356 public int getMinecartType()
1357 {
1358 return minecartType;
1359 }
1360
1361 /**
1362 * Gets the current global Minecart Collision handler if none
1363 * is registered, returns null
1364 * @return The collision handler or null
1365 */
1366 public static IMinecartCollisionHandler getCollisionHandler()
1367 {
1368 return collisionHandler;
1369 }
1370
1371 /**
1372 * Sets the global Minecart Collision handler, overwrites any
1373 * that is currently set.
1374 * @param handler The new handler
1375 */
1376 public static void setCollisionHandler(IMinecartCollisionHandler handler)
1377 {
1378 collisionHandler = handler;
1379 }
1380
1381 /**
1382 * Carts should return their drag factor here
1383 * @return The drag rate.
1384 */
1385 protected double getDrag()
1386 {
1387 return riddenByEntity != null ? defaultDragRidden : defaultDragEmpty;
1388 }
1389
1390 /**
1391 * Moved to allow overrides.
1392 * This code applies drag and updates push forces.
1393 */
1394 protected void applyDragAndPushForces()
1395 {
1396 if(isPoweredCart())
1397 {
1398 double d27 = MathHelper.sqrt_double(pushX * pushX + pushZ * pushZ);
1399 if(d27 > 0.01D)
1400 {
1401 pushX /= d27;
1402 pushZ /= d27;
1403 double d29 = 0.04;
1404 motionX *= 0.8D;
1405 motionY *= 0.0D;
1406 motionZ *= 0.8D;
1407 motionX += pushX * d29;
1408 motionZ += pushZ * d29;
1409 }
1410 else
1411 {
1412 motionX *= 0.9D;
1413 motionY *= 0.0D;
1414 motionZ *= 0.9D;
1415 }
1416 }
1417 motionX *= getDrag();
1418 motionY *= 0.0D;
1419 motionZ *= getDrag();
1420 }
1421
1422 /**
1423 * Moved to allow overrides.
1424 * This code updates push forces.
1425 */
1426 protected void updatePushForces()
1427 {
1428 if(isPoweredCart())
1429 {
1430 double push = MathHelper.sqrt_double(pushX * pushX + pushZ * pushZ);
1431 if(push > 0.01D && motionX * motionX + motionZ * motionZ > 0.001D)
1432 {
1433 pushX /= push;
1434 pushZ /= push;
1435 if(pushX * motionX + pushZ * motionZ < 0.0D)
1436 {
1437 pushX = 0.0D;
1438 pushZ = 0.0D;
1439 }
1440 else
1441 {
1442 pushX = motionX;
1443 pushZ = motionZ;
1444 }
1445 }
1446 }
1447 }
1448
1449 /**
1450 * Moved to allow overrides.
1451 * This code handles minecart movement and speed capping when on a rail.
1452 */
1453 protected void moveMinecartOnRail(int i, int j, int k)
1454 {
1455 int id = worldObj.getBlockId(i, j, k);
1456 if (!BlockRail.isRailBlock(id))
1457 {
1458 return;
1459 }
1460 float railMaxSpeed = ((BlockRail)Block.blocksList[id]).getRailMaxSpeed(worldObj, this, i, j, k);
1461
1462 double maxSpeed = Math.min(railMaxSpeed, getMaxSpeedRail());
1463 double mX = motionX;
1464 double mZ = motionZ;
1465 if(riddenByEntity != null)
1466 {
1467 mX *= 0.75D;
1468 mZ *= 0.75D;
1469 }
1470 if(mX < -maxSpeed) mX = -maxSpeed;
1471 if(mX > maxSpeed) mX = maxSpeed;
1472 if(mZ < -maxSpeed) mZ = -maxSpeed;
1473 if(mZ > maxSpeed) mZ = maxSpeed;
1474 moveEntity(mX, 0.0D, mZ);
1475 }
1476
1477 /**
1478 * Moved to allow overrides.
1479 * This code handles minecart movement and speed capping when not on a rail.
1480 */
1481 protected void moveMinecartOffRail(int i, int j, int k)
1482 {
1483 double d2 = getMaxSpeedGround();
1484 if(!onGround)
1485 {
1486 d2 = getMaxSpeedAirLateral();
1487 }
1488 if(motionX < -d2) motionX = -d2;
1489 if(motionX > d2) motionX = d2;
1490 if(motionZ < -d2) motionZ = -d2;
1491 if(motionZ > d2) motionZ = d2;
1492 double moveY = motionY;
1493 if(getMaxSpeedAirVertical() > 0 && motionY > getMaxSpeedAirVertical())
1494 {
1495 moveY = getMaxSpeedAirVertical();
1496 if(Math.abs(motionX) < 0.3f && Math.abs(motionZ) < 0.3f)
1497 {
1498 moveY = 0.15f;
1499 motionY = moveY;
1500 }
1501 }
1502 if(onGround)
1503 {
1504 motionX *= 0.5D;
1505 motionY *= 0.5D;
1506 motionZ *= 0.5D;
1507 }
1508 moveEntity(motionX, moveY, motionZ);
1509 if(!onGround)
1510 {
1511 motionX *= getDragAir();
1512 motionY *= getDragAir();
1513 motionZ *= getDragAir();
1514 }
1515 }
1516
1517 /**
1518 * Moved to allow overrides.
1519 * This code applies fuel consumption.
1520 */
1521 protected void updateFuel()
1522 {
1523 if (fuel > 0) fuel--;
1524 if (fuel <= 0) pushX = pushZ = 0.0D;
1525 setMinecartPowered(fuel > 0);
1526 }
1527
1528 /**
1529 * Moved to allow overrides, This code handle slopes affecting velocity.
1530 * @param metadata The blocks position metadata
1531 */
1532 protected void adjustSlopeVelocities(int metadata)
1533 {
1534 double acceleration = 0.0078125D;
1535 if (metadata == 2)
1536 {
1537 motionX -= acceleration;
1538 }
1539 else if (metadata == 3)
1540 {
1541 motionX += acceleration;
1542 }
1543 else if (metadata == 4)
1544 {
1545 motionZ += acceleration;
1546 }
1547 else if (metadata == 5)
1548 {
1549 motionZ -= acceleration;
1550 }
1551 }
1552
1553 /**
1554 * Getters/setters for physics variables
1555 */
1556
1557 /**
1558 * Returns the carts max speed.
1559 * Carts going faster than 1.1 cause issues with chunk loading.
1560 * Carts cant traverse slopes or corners at greater than 0.5 - 0.6.
1561 * This value is compared with the rails max speed to determine
1562 * the carts current max speed. A normal rails max speed is 0.4.
1563 * @return Carts max speed.
1564 */
1565 public float getMaxSpeedRail()
1566 {
1567 return maxSpeedRail;
1568 }
1569
1570 public void setMaxSpeedRail(float value)
1571 {
1572 maxSpeedRail = value;
1573 }
1574
1575 public float getMaxSpeedGround()
1576 {
1577 return maxSpeedGround;
1578 }
1579
1580 public void setMaxSpeedGround(float value)
1581 {
1582 maxSpeedGround = value;
1583 }
1584
1585 public float getMaxSpeedAirLateral()
1586 {
1587 return maxSpeedAirLateral;
1588 }
1589
1590 public void setMaxSpeedAirLateral(float value)
1591 {
1592 maxSpeedAirLateral = value;
1593 }
1594
1595 public float getMaxSpeedAirVertical()
1596 {
1597 return maxSpeedAirVertical;
1598 }
1599
1600 public void setMaxSpeedAirVertical(float value)
1601 {
1602 maxSpeedAirVertical = value;
1603 }
1604
1605 public double getDragAir()
1606 {
1607 return dragAir;
1608 }
1609
1610 public void setDragAir(double value)
1611 {
1612 dragAir = value;
1613 }
1614 }