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 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}}};
047
048 /** appears to be the progress of the turn */
049 protected int turnProgress;
050 protected double minecartX;
051 protected double minecartY;
052 protected double minecartZ;
053 protected double minecartYaw;
054 protected double minecartPitch;
055 @SideOnly(Side.CLIENT)
056 protected double velocityX;
057 @SideOnly(Side.CLIENT)
058 protected double velocityY;
059 @SideOnly(Side.CLIENT)
060 protected double velocityZ;
061
062 /* Forge: Minecart Compatibility Layer Integration. */
063 public static float defaultMaxSpeedRail = 0.4f;
064 public static float defaultMaxSpeedGround = 0.4f;
065 public static float defaultMaxSpeedAirLateral = 0.4f;
066 public static float defaultMaxSpeedAirVertical = -1f;
067 public static double defaultDragRidden = 0.996999979019165D;
068 public static double defaultDragEmpty = 0.9599999785423279D;
069 public static double defaultDragAir = 0.94999998807907104D;
070 protected boolean canUseRail = true;
071 protected boolean canBePushed = true;
072 private static IMinecartCollisionHandler collisionHandler = null;
073
074 /* Instance versions of the above physics properties */
075 protected float maxSpeedRail;
076 protected float maxSpeedGround;
077 protected float maxSpeedAirLateral;
078 protected float maxSpeedAirVertical;
079 protected double dragAir;
080
081 public EntityMinecart(World par1World)
082 {
083 super(par1World);
084 this.cargoItems = new ItemStack[36];
085 this.fuel = 0;
086 this.field_70499_f = false;
087 this.field_82345_h = true;
088 this.preventEntitySpawning = true;
089 this.setSize(0.98F, 0.7F);
090 this.yOffset = this.height / 2.0F;
091 this.field_82344_g = par1World != null ? par1World.func_82735_a(this) : null;
092
093 maxSpeedRail = defaultMaxSpeedRail;
094 maxSpeedGround = defaultMaxSpeedGround;
095 maxSpeedAirLateral = defaultMaxSpeedAirLateral;
096 maxSpeedAirVertical = defaultMaxSpeedAirVertical;
097 dragAir = defaultDragAir;
098 }
099
100 public EntityMinecart(World world, int type)
101 {
102 this(world);
103 minecartType = type;
104 }
105
106 /**
107 * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
108 * prevent them from trampling crops
109 */
110 protected boolean canTriggerWalking()
111 {
112 return false;
113 }
114
115 protected void entityInit()
116 {
117 this.dataWatcher.addObject(16, new Byte((byte)0));
118 this.dataWatcher.addObject(17, new Integer(0));
119 this.dataWatcher.addObject(18, new Integer(1));
120 this.dataWatcher.addObject(19, new Integer(0));
121 }
122
123 /**
124 * Returns a boundingBox used to collide the entity with other entities and blocks. This enables the entity to be
125 * pushable on contact, like boats or minecarts.
126 */
127 public AxisAlignedBB getCollisionBox(Entity par1Entity)
128 {
129 if (getCollisionHandler() != null)
130 {
131 return getCollisionHandler().getCollisionBox(this, par1Entity);
132 }
133 return par1Entity.canBePushed() ? par1Entity.boundingBox : null;
134 }
135
136 /**
137 * returns the bounding box for this entity
138 */
139 public AxisAlignedBB getBoundingBox()
140 {
141 if (getCollisionHandler() != null)
142 {
143 return getCollisionHandler().getBoundingBox(this);
144 }
145 return null;
146 }
147
148 /**
149 * Returns true if this entity should push and be pushed by other entities when colliding.
150 */
151 public boolean canBePushed()
152 {
153 return canBePushed;
154 }
155
156 public EntityMinecart(World par1World, double par2, double par4, double par6, int par8)
157 {
158 this(par1World);
159 this.setPosition(par2, par4 + (double)this.yOffset, par6);
160 this.motionX = 0.0D;
161 this.motionY = 0.0D;
162 this.motionZ = 0.0D;
163 this.prevPosX = par2;
164 this.prevPosY = par4;
165 this.prevPosZ = par6;
166 this.minecartType = par8;
167 }
168
169 /**
170 * Returns the Y offset from the entity's position for any entity riding this one.
171 */
172 public double getMountedYOffset()
173 {
174 return (double)this.height * 0.0D - 0.30000001192092896D;
175 }
176
177 /**
178 * Called when the entity is attacked.
179 */
180 public boolean attackEntityFrom(DamageSource par1DamageSource, int par2)
181 {
182 if (!this.worldObj.isRemote && !this.isDead)
183 {
184 if (this.func_85032_ar())
185 {
186 return false;
187 }
188 else
189 {
190 this.func_70494_i(-this.func_70493_k());
191 this.func_70497_h(10);
192 this.setBeenAttacked();
193 this.setDamage(this.getDamage() + par2 * 10);
194
195 if (par1DamageSource.getEntity() instanceof EntityPlayer && ((EntityPlayer)par1DamageSource.getEntity()).capabilities.isCreativeMode)
196 {
197 this.setDamage(100);
198 }
199
200 if (this.getDamage() > 40)
201 {
202 if (this.riddenByEntity != null)
203 {
204 this.riddenByEntity.mountEntity(this);
205 }
206
207 this.setDead();
208 dropCartAsItem();
209 }
210
211 return true;
212 }
213 }
214 else
215 {
216 return true;
217 }
218 }
219
220 @SideOnly(Side.CLIENT)
221
222 /**
223 * Setups the entity to do the hurt animation. Only used by packets in multiplayer.
224 */
225 public void performHurtAnimation()
226 {
227 this.func_70494_i(-this.func_70493_k());
228 this.func_70497_h(10);
229 this.setDamage(this.getDamage() + this.getDamage() * 10);
230 }
231
232 /**
233 * Returns true if other Entities should be prevented from moving through this Entity.
234 */
235 public boolean canBeCollidedWith()
236 {
237 return !this.isDead;
238 }
239
240 /**
241 * Will get destroyed next tick.
242 */
243 public void setDead()
244 {
245 if (this.field_82345_h)
246 {
247 for (int var1 = 0; var1 < this.getSizeInventory(); ++var1)
248 {
249 ItemStack var2 = this.getStackInSlot(var1);
250
251 if (var2 != null)
252 {
253 float var3 = this.rand.nextFloat() * 0.8F + 0.1F;
254 float var4 = this.rand.nextFloat() * 0.8F + 0.1F;
255 float var5 = this.rand.nextFloat() * 0.8F + 0.1F;
256
257 while (var2.stackSize > 0)
258 {
259 int var6 = this.rand.nextInt(21) + 10;
260
261 if (var6 > var2.stackSize)
262 {
263 var6 = var2.stackSize;
264 }
265
266 var2.stackSize -= var6;
267 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()));
268
269 if (var2.hasTagCompound())
270 {
271 var7.func_92014_d().setTagCompound((NBTTagCompound)var2.getTagCompound().copy());
272 }
273
274 float var8 = 0.05F;
275 var7.motionX = (double)((float)this.rand.nextGaussian() * var8);
276 var7.motionY = (double)((float)this.rand.nextGaussian() * var8 + 0.2F);
277 var7.motionZ = (double)((float)this.rand.nextGaussian() * var8);
278 this.worldObj.spawnEntityInWorld(var7);
279 }
280 }
281 }
282 }
283
284 super.setDead();
285
286 if (this.field_82344_g != null)
287 {
288 this.field_82344_g.update();
289 }
290 }
291
292 /**
293 * Teleports the entity to another dimension. Params: Dimension number to teleport to
294 */
295 public void travelToDimension(int par1)
296 {
297 this.field_82345_h = false;
298 super.travelToDimension(par1);
299 }
300
301 /**
302 * Called to update the entity's position/logic.
303 */
304 public void onUpdate()
305 {
306 if (this.field_82344_g != null)
307 {
308 this.field_82344_g.update();
309 }
310
311 if (this.func_70496_j() > 0)
312 {
313 this.func_70497_h(this.func_70496_j() - 1);
314 }
315
316 if (this.getDamage() > 0)
317 {
318 this.setDamage(this.getDamage() - 1);
319 }
320
321 if (this.posY < -64.0D)
322 {
323 this.kill();
324 }
325
326 if (this.isMinecartPowered() && this.rand.nextInt(4) == 0 && minecartType == 2 && getClass() == EntityMinecart.class)
327 {
328 this.worldObj.spawnParticle("largesmoke", this.posX, this.posY + 0.8D, this.posZ, 0.0D, 0.0D, 0.0D);
329 }
330
331 int var2;
332
333 if (!this.worldObj.isRemote && this.worldObj instanceof WorldServer)
334 {
335 this.worldObj.theProfiler.startSection("portal");
336 MinecraftServer var1 = ((WorldServer)this.worldObj).getMinecraftServer();
337 var2 = this.getMaxInPortalTime();
338
339 if (this.inPortal)
340 {
341 if (var1.getAllowNether())
342 {
343 if (this.ridingEntity == null && this.field_82153_h++ >= var2)
344 {
345 this.field_82153_h = var2;
346 this.timeUntilPortal = this.getPortalCooldown();
347 byte var3;
348
349 if (this.worldObj.provider.dimensionId == -1)
350 {
351 var3 = 0;
352 }
353 else
354 {
355 var3 = -1;
356 }
357
358 this.travelToDimension(var3);
359 }
360
361 this.inPortal = false;
362 }
363 }
364 else
365 {
366 if (this.field_82153_h > 0)
367 {
368 this.field_82153_h -= 4;
369 }
370
371 if (this.field_82153_h < 0)
372 {
373 this.field_82153_h = 0;
374 }
375 }
376
377 if (this.timeUntilPortal > 0)
378 {
379 --this.timeUntilPortal;
380 }
381
382 this.worldObj.theProfiler.endSection();
383 }
384
385 if (this.worldObj.isRemote)
386 {
387 if (this.turnProgress > 0)
388 {
389 double var46 = this.posX + (this.minecartX - this.posX) / (double)this.turnProgress;
390 double var48 = this.posY + (this.minecartY - this.posY) / (double)this.turnProgress;
391 double var5 = this.posZ + (this.minecartZ - this.posZ) / (double)this.turnProgress;
392 double var7 = MathHelper.wrapAngleTo180_double(this.minecartYaw - (double)this.rotationYaw);
393 this.rotationYaw = (float)((double)this.rotationYaw + var7 / (double)this.turnProgress);
394 this.rotationPitch = (float)((double)this.rotationPitch + (this.minecartPitch - (double)this.rotationPitch) / (double)this.turnProgress);
395 --this.turnProgress;
396 this.setPosition(var46, var48, var5);
397 this.setRotation(this.rotationYaw, this.rotationPitch);
398 }
399 else
400 {
401 this.setPosition(this.posX, this.posY, this.posZ);
402 this.setRotation(this.rotationYaw, this.rotationPitch);
403 }
404 }
405 else
406 {
407 this.prevPosX = this.posX;
408 this.prevPosY = this.posY;
409 this.prevPosZ = this.posZ;
410 this.motionY -= 0.03999999910593033D;
411 int var45 = MathHelper.floor_double(this.posX);
412 var2 = MathHelper.floor_double(this.posY);
413 int var47 = MathHelper.floor_double(this.posZ);
414
415 if (BlockRail.isRailBlockAt(this.worldObj, var45, var2 - 1, var47))
416 {
417 --var2;
418 }
419
420 double var4 = 0.4D;
421 double var6 = 0.0078125D;
422 int var8 = this.worldObj.getBlockId(var45, var2, var47);
423
424 if (canUseRail() && BlockRail.isRailBlock(var8))
425 {
426 this.fallDistance = 0.0F;
427 Vec3 var9 = this.func_70489_a(this.posX, this.posY, this.posZ);
428 int var10 = ((BlockRail)Block.blocksList[var8]).getBasicRailMetadata(worldObj, this, var45, var2, var47);
429 this.posY = (double)var2;
430 boolean var11 = false;
431 boolean var12 = false;
432
433 if (var8 == Block.railPowered.blockID)
434 {
435 var11 = (worldObj.getBlockMetadata(var45, var2, var47) & 8) != 0;
436 var12 = !var11;
437 }
438
439 if (((BlockRail)Block.blocksList[var8]).isPowered())
440 {
441 var10 &= 7;
442 }
443
444 if (var10 >= 2 && var10 <= 5)
445 {
446 this.posY = (double)(var2 + 1);
447 }
448
449 adjustSlopeVelocities(var10);
450
451 int[][] var13 = field_70500_g[var10];
452 double var14 = (double)(var13[1][0] - var13[0][0]);
453 double var16 = (double)(var13[1][2] - var13[0][2]);
454 double var18 = Math.sqrt(var14 * var14 + var16 * var16);
455 double var20 = this.motionX * var14 + this.motionZ * var16;
456
457 if (var20 < 0.0D)
458 {
459 var14 = -var14;
460 var16 = -var16;
461 }
462
463 double var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
464 this.motionX = var22 * var14 / var18;
465 this.motionZ = var22 * var16 / var18;
466 double var24;
467 double var26;
468
469 if (this.riddenByEntity != null)
470 {
471 var24 = this.riddenByEntity.motionX * this.riddenByEntity.motionX + this.riddenByEntity.motionZ * this.riddenByEntity.motionZ;
472 var26 = this.motionX * this.motionX + this.motionZ * this.motionZ;
473
474 if (var24 > 1.0E-4D && var26 < 0.01D)
475 {
476 this.motionX += this.riddenByEntity.motionX * 0.1D;
477 this.motionZ += this.riddenByEntity.motionZ * 0.1D;
478 var12 = false;
479 }
480 }
481
482 if (var12 && shouldDoRailFunctions())
483 {
484 var24 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
485
486 if (var24 < 0.03D)
487 {
488 this.motionX *= 0.0D;
489 this.motionY *= 0.0D;
490 this.motionZ *= 0.0D;
491 }
492 else
493 {
494 this.motionX *= 0.5D;
495 this.motionY *= 0.0D;
496 this.motionZ *= 0.5D;
497 }
498 }
499
500 var24 = 0.0D;
501 var26 = (double)var45 + 0.5D + (double)var13[0][0] * 0.5D;
502 double var28 = (double)var47 + 0.5D + (double)var13[0][2] * 0.5D;
503 double var30 = (double)var45 + 0.5D + (double)var13[1][0] * 0.5D;
504 double var32 = (double)var47 + 0.5D + (double)var13[1][2] * 0.5D;
505 var14 = var30 - var26;
506 var16 = var32 - var28;
507 double var34;
508 double var36;
509
510 if (var14 == 0.0D)
511 {
512 this.posX = (double)var45 + 0.5D;
513 var24 = this.posZ - (double)var47;
514 }
515 else if (var16 == 0.0D)
516 {
517 this.posZ = (double)var47 + 0.5D;
518 var24 = this.posX - (double)var45;
519 }
520 else
521 {
522 var34 = this.posX - var26;
523 var36 = this.posZ - var28;
524 var24 = (var34 * var14 + var36 * var16) * 2.0D;
525 }
526
527 this.posX = var26 + var14 * var24;
528 this.posZ = var28 + var16 * var24;
529 this.setPosition(this.posX, this.posY + (double)this.yOffset, this.posZ);
530
531 moveMinecartOnRail(var45, var2, var47);
532
533 if (var13[0][1] != 0 && MathHelper.floor_double(this.posX) - var45 == var13[0][0] && MathHelper.floor_double(this.posZ) - var47 == var13[0][2])
534 {
535 this.setPosition(this.posX, this.posY + (double)var13[0][1], this.posZ);
536 }
537 else if (var13[1][1] != 0 && MathHelper.floor_double(this.posX) - var45 == var13[1][0] && MathHelper.floor_double(this.posZ) - var47 == var13[1][2])
538 {
539 this.setPosition(this.posX, this.posY + (double)var13[1][1], this.posZ);
540 }
541
542 applyDragAndPushForces();
543
544 Vec3 var54 = this.func_70489_a(this.posX, this.posY, this.posZ);
545
546 if (var54 != null && var9 != null)
547 {
548 double var39 = (var9.yCoord - var54.yCoord) * 0.05D;
549 var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
550
551 if (var22 > 0.0D)
552 {
553 this.motionX = this.motionX / var22 * (var22 + var39);
554 this.motionZ = this.motionZ / var22 * (var22 + var39);
555 }
556
557 this.setPosition(this.posX, var54.yCoord, this.posZ);
558 }
559
560 int var53 = MathHelper.floor_double(this.posX);
561 int var55 = MathHelper.floor_double(this.posZ);
562
563 if (var53 != var45 || var55 != var47)
564 {
565 var22 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
566 this.motionX = var22 * (double)(var53 - var45);
567 this.motionZ = var22 * (double)(var55 - var47);
568 }
569
570 double var41;
571
572 updatePushForces();
573
574 if(shouldDoRailFunctions())
575 {
576 ((BlockRail)Block.blocksList[var8]).onMinecartPass(worldObj, this, var45, var2, var47);
577 }
578
579 if (var11 && shouldDoRailFunctions())
580 {
581 var41 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
582
583 if (var41 > 0.01D)
584 {
585 double var43 = 0.06D;
586 this.motionX += this.motionX / var41 * var43;
587 this.motionZ += this.motionZ / var41 * var43;
588 }
589 else if (var10 == 1)
590 {
591 if (this.worldObj.isBlockNormalCube(var45 - 1, var2, var47))
592 {
593 this.motionX = 0.02D;
594 }
595 else if (this.worldObj.isBlockNormalCube(var45 + 1, var2, var47))
596 {
597 this.motionX = -0.02D;
598 }
599 }
600 else if (var10 == 0)
601 {
602 if (this.worldObj.isBlockNormalCube(var45, var2, var47 - 1))
603 {
604 this.motionZ = 0.02D;
605 }
606 else if (this.worldObj.isBlockNormalCube(var45, var2, var47 + 1))
607 {
608 this.motionZ = -0.02D;
609 }
610 }
611 }
612 }
613 else
614 {
615 moveMinecartOffRail(var45, var2, var47);
616 }
617
618 this.doBlockCollisions();
619 this.rotationPitch = 0.0F;
620 double var49 = this.prevPosX - this.posX;
621 double var50 = this.prevPosZ - this.posZ;
622
623 if (var49 * var49 + var50 * var50 > 0.001D)
624 {
625 this.rotationYaw = (float)(Math.atan2(var50, var49) * 180.0D / Math.PI);
626
627 if (this.field_70499_f)
628 {
629 this.rotationYaw += 180.0F;
630 }
631 }
632
633 double var51 = (double)MathHelper.wrapAngleTo180_float(this.rotationYaw - this.prevRotationYaw);
634
635 if (var51 < -170.0D || var51 >= 170.0D)
636 {
637 this.rotationYaw += 180.0F;
638 this.field_70499_f = !this.field_70499_f;
639 }
640
641 this.setRotation(this.rotationYaw, this.rotationPitch);
642
643 AxisAlignedBB box = null;
644 if (getCollisionHandler() != null)
645 {
646 box = getCollisionHandler().getMinecartCollisionBox(this);
647 }
648 else
649 {
650 box = boundingBox.expand(0.2D, 0.0D, 0.2D);
651 }
652
653 List var15 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, box);
654
655 if (var15 != null && !var15.isEmpty())
656 {
657 for (int var52 = 0; var52 < var15.size(); ++var52)
658 {
659 Entity var17 = (Entity)var15.get(var52);
660
661 if (var17 != this.riddenByEntity && var17.canBePushed() && var17 instanceof EntityMinecart)
662 {
663 var17.applyEntityCollision(this);
664 }
665 }
666 }
667
668 if (this.riddenByEntity != null && this.riddenByEntity.isDead)
669 {
670 if (this.riddenByEntity.ridingEntity == this)
671 {
672 this.riddenByEntity.ridingEntity = null;
673 }
674
675 this.riddenByEntity = null;
676 }
677
678 updateFuel();
679 MinecraftForge.EVENT_BUS.post(new MinecartUpdateEvent(this, var45, var2, var47));
680 }
681 }
682
683 @SideOnly(Side.CLIENT)
684 public Vec3 func_70495_a(double par1, double par3, double par5, double par7)
685 {
686 int var9 = MathHelper.floor_double(par1);
687 int var10 = MathHelper.floor_double(par3);
688 int var11 = MathHelper.floor_double(par5);
689
690 if (BlockRail.isRailBlockAt(this.worldObj, var9, var10 - 1, var11))
691 {
692 --var10;
693 }
694
695 int var12 = this.worldObj.getBlockId(var9, var10, var11);
696
697 if (!BlockRail.isRailBlock(var12))
698 {
699 return null;
700 }
701 else
702 {
703 int var13 = ((BlockRail)Block.blocksList[var12]).getBasicRailMetadata(worldObj, this, var9, var10, var11);
704
705 par3 = (double)var10;
706
707 if (var13 >= 2 && var13 <= 5)
708 {
709 par3 = (double)(var10 + 1);
710 }
711
712 int[][] var14 = field_70500_g[var13];
713 double var15 = (double)(var14[1][0] - var14[0][0]);
714 double var17 = (double)(var14[1][2] - var14[0][2]);
715 double var19 = Math.sqrt(var15 * var15 + var17 * var17);
716 var15 /= var19;
717 var17 /= var19;
718 par1 += var15 * par7;
719 par5 += var17 * par7;
720
721 if (var14[0][1] != 0 && MathHelper.floor_double(par1) - var9 == var14[0][0] && MathHelper.floor_double(par5) - var11 == var14[0][2])
722 {
723 par3 += (double)var14[0][1];
724 }
725 else if (var14[1][1] != 0 && MathHelper.floor_double(par1) - var9 == var14[1][0] && MathHelper.floor_double(par5) - var11 == var14[1][2])
726 {
727 par3 += (double)var14[1][1];
728 }
729
730 return this.func_70489_a(par1, par3, par5);
731 }
732 }
733
734 public Vec3 func_70489_a(double par1, double par3, double par5)
735 {
736 int var7 = MathHelper.floor_double(par1);
737 int var8 = MathHelper.floor_double(par3);
738 int var9 = MathHelper.floor_double(par5);
739
740 if (BlockRail.isRailBlockAt(this.worldObj, var7, var8 - 1, var9))
741 {
742 --var8;
743 }
744
745 int var10 = this.worldObj.getBlockId(var7, var8, var9);
746
747 if (BlockRail.isRailBlock(var10))
748 {
749 int var11 = ((BlockRail)Block.blocksList[var10]).getBasicRailMetadata(worldObj, this, var7, var8, var9);
750 par3 = (double)var8;
751
752 if (var11 >= 2 && var11 <= 5)
753 {
754 par3 = (double)(var8 + 1);
755 }
756
757 int[][] var12 = field_70500_g[var11];
758 double var13 = 0.0D;
759 double var15 = (double)var7 + 0.5D + (double)var12[0][0] * 0.5D;
760 double var17 = (double)var8 + 0.5D + (double)var12[0][1] * 0.5D;
761 double var19 = (double)var9 + 0.5D + (double)var12[0][2] * 0.5D;
762 double var21 = (double)var7 + 0.5D + (double)var12[1][0] * 0.5D;
763 double var23 = (double)var8 + 0.5D + (double)var12[1][1] * 0.5D;
764 double var25 = (double)var9 + 0.5D + (double)var12[1][2] * 0.5D;
765 double var27 = var21 - var15;
766 double var29 = (var23 - var17) * 2.0D;
767 double var31 = var25 - var19;
768
769 if (var27 == 0.0D)
770 {
771 par1 = (double)var7 + 0.5D;
772 var13 = par5 - (double)var9;
773 }
774 else if (var31 == 0.0D)
775 {
776 par5 = (double)var9 + 0.5D;
777 var13 = par1 - (double)var7;
778 }
779 else
780 {
781 double var33 = par1 - var15;
782 double var35 = par5 - var19;
783 var13 = (var33 * var27 + var35 * var31) * 2.0D;
784 }
785
786 par1 = var15 + var27 * var13;
787 par3 = var17 + var29 * var13;
788 par5 = var19 + var31 * var13;
789
790 if (var29 < 0.0D)
791 {
792 ++par3;
793 }
794
795 if (var29 > 0.0D)
796 {
797 par3 += 0.5D;
798 }
799
800 return this.worldObj.getWorldVec3Pool().getVecFromPool(par1, par3, par5);
801 }
802 else
803 {
804 return null;
805 }
806 }
807
808 /**
809 * (abstract) Protected helper method to write subclass entity data to NBT.
810 */
811 protected void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
812 {
813 par1NBTTagCompound.setInteger("Type", this.minecartType);
814
815 if (isPoweredCart())
816 {
817 par1NBTTagCompound.setDouble("PushX", this.pushX);
818 par1NBTTagCompound.setDouble("PushZ", this.pushZ);
819 par1NBTTagCompound.setInteger("Fuel", this.fuel);
820 }
821
822 if (getSizeInventory() > 0)
823 {
824 NBTTagList var2 = new NBTTagList();
825
826 for (int var3 = 0; var3 < this.cargoItems.length; ++var3)
827 {
828 if (this.cargoItems[var3] != null)
829 {
830 NBTTagCompound var4 = new NBTTagCompound();
831 var4.setByte("Slot", (byte)var3);
832 this.cargoItems[var3].writeToNBT(var4);
833 var2.appendTag(var4);
834 }
835 }
836
837 par1NBTTagCompound.setTag("Items", var2);
838 }
839 }
840
841 /**
842 * (abstract) Protected helper method to read subclass entity data from NBT.
843 */
844 protected void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
845 {
846 this.minecartType = par1NBTTagCompound.getInteger("Type");
847
848 if (isPoweredCart())
849 {
850 this.pushX = par1NBTTagCompound.getDouble("PushX");
851 this.pushZ = par1NBTTagCompound.getDouble("PushZ");
852 try
853 {
854 this.fuel = par1NBTTagCompound.getInteger("Fuel");
855 }
856 catch (ClassCastException e)
857 {
858 this.fuel = par1NBTTagCompound.getShort("Fuel");
859 }
860 }
861
862 if (getSizeInventory() > 0)
863 {
864 NBTTagList var2 = par1NBTTagCompound.getTagList("Items");
865 this.cargoItems = new ItemStack[this.getSizeInventory()];
866
867 for (int var3 = 0; var3 < var2.tagCount(); ++var3)
868 {
869 NBTTagCompound var4 = (NBTTagCompound)var2.tagAt(var3);
870 int var5 = var4.getByte("Slot") & 255;
871
872 if (var5 >= 0 && var5 < this.cargoItems.length)
873 {
874 this.cargoItems[var5] = ItemStack.loadItemStackFromNBT(var4);
875 }
876 }
877 }
878 }
879
880 @SideOnly(Side.CLIENT)
881 public float getShadowSize()
882 {
883 return 0.0F;
884 }
885
886 /**
887 * Applies a velocity to each of the entities pushing them away from each other. Args: entity
888 */
889 public void applyEntityCollision(Entity par1Entity)
890 {
891 MinecraftForge.EVENT_BUS.post(new MinecartCollisionEvent(this, par1Entity));
892 if (getCollisionHandler() != null)
893 {
894 getCollisionHandler().onEntityCollision(this, par1Entity);
895 return;
896 }
897 if (!this.worldObj.isRemote)
898 {
899 if (par1Entity != this.riddenByEntity)
900 {
901 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)
902 {
903 par1Entity.mountEntity(this);
904 }
905
906 double var2 = par1Entity.posX - this.posX;
907 double var4 = par1Entity.posZ - this.posZ;
908 double var6 = var2 * var2 + var4 * var4;
909
910 if (var6 >= 9.999999747378752E-5D)
911 {
912 var6 = (double)MathHelper.sqrt_double(var6);
913 var2 /= var6;
914 var4 /= var6;
915 double var8 = 1.0D / var6;
916
917 if (var8 > 1.0D)
918 {
919 var8 = 1.0D;
920 }
921
922 var2 *= var8;
923 var4 *= var8;
924 var2 *= 0.10000000149011612D;
925 var4 *= 0.10000000149011612D;
926 var2 *= (double)(1.0F - this.entityCollisionReduction);
927 var4 *= (double)(1.0F - this.entityCollisionReduction);
928 var2 *= 0.5D;
929 var4 *= 0.5D;
930
931 if (par1Entity instanceof EntityMinecart)
932 {
933 double var10 = par1Entity.posX - this.posX;
934 double var12 = par1Entity.posZ - this.posZ;
935 Vec3 var14 = this.worldObj.getWorldVec3Pool().getVecFromPool(var10, 0.0D, var12).normalize();
936 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();
937 double var16 = Math.abs(var14.dotProduct(var15));
938
939 if (var16 < 0.800000011920929D)
940 {
941 return;
942 }
943
944 double var18 = par1Entity.motionX + this.motionX;
945 double var20 = par1Entity.motionZ + this.motionZ;
946
947 if (((EntityMinecart)par1Entity).isPoweredCart() && !isPoweredCart())
948 {
949 this.motionX *= 0.20000000298023224D;
950 this.motionZ *= 0.20000000298023224D;
951 this.addVelocity(par1Entity.motionX - var2, 0.0D, par1Entity.motionZ - var4);
952 par1Entity.motionX *= 0.949999988079071D;
953 par1Entity.motionZ *= 0.949999988079071D;
954 }
955 else if (!((EntityMinecart)par1Entity).isPoweredCart() && isPoweredCart())
956 {
957 par1Entity.motionX *= 0.20000000298023224D;
958 par1Entity.motionZ *= 0.20000000298023224D;
959 par1Entity.addVelocity(this.motionX + var2, 0.0D, this.motionZ + var4);
960 this.motionX *= 0.949999988079071D;
961 this.motionZ *= 0.949999988079071D;
962 }
963 else
964 {
965 var18 /= 2.0D;
966 var20 /= 2.0D;
967 this.motionX *= 0.20000000298023224D;
968 this.motionZ *= 0.20000000298023224D;
969 this.addVelocity(var18 - var2, 0.0D, var20 - var4);
970 par1Entity.motionX *= 0.20000000298023224D;
971 par1Entity.motionZ *= 0.20000000298023224D;
972 par1Entity.addVelocity(var18 + var2, 0.0D, var20 + var4);
973 }
974 }
975 else
976 {
977 this.addVelocity(-var2, 0.0D, -var4);
978 par1Entity.addVelocity(var2 / 4.0D, 0.0D, var4 / 4.0D);
979 }
980 }
981 }
982 }
983 }
984
985 /**
986 * Returns the number of slots in the inventory.
987 */
988 public int getSizeInventory()
989 {
990 return (minecartType == 1 && getClass() == EntityMinecart.class ? 27 : 0);
991 }
992
993 /**
994 * Returns the stack in slot i
995 */
996 public ItemStack getStackInSlot(int par1)
997 {
998 return this.cargoItems[par1];
999 }
1000
1001 /**
1002 * Removes from an inventory slot (first arg) up to a specified number (second arg) of items and returns them in a
1003 * new stack.
1004 */
1005 public ItemStack decrStackSize(int par1, int par2)
1006 {
1007 if (this.cargoItems[par1] != null)
1008 {
1009 ItemStack var3;
1010
1011 if (this.cargoItems[par1].stackSize <= par2)
1012 {
1013 var3 = this.cargoItems[par1];
1014 this.cargoItems[par1] = null;
1015 return var3;
1016 }
1017 else
1018 {
1019 var3 = this.cargoItems[par1].splitStack(par2);
1020
1021 if (this.cargoItems[par1].stackSize == 0)
1022 {
1023 this.cargoItems[par1] = null;
1024 }
1025
1026 return var3;
1027 }
1028 }
1029 else
1030 {
1031 return null;
1032 }
1033 }
1034
1035 /**
1036 * When some containers are closed they call this on each slot, then drop whatever it returns as an EntityItem -
1037 * like when you close a workbench GUI.
1038 */
1039 public ItemStack getStackInSlotOnClosing(int par1)
1040 {
1041 if (this.cargoItems[par1] != null)
1042 {
1043 ItemStack var2 = this.cargoItems[par1];
1044 this.cargoItems[par1] = null;
1045 return var2;
1046 }
1047 else
1048 {
1049 return null;
1050 }
1051 }
1052
1053 /**
1054 * Sets the given item stack to the specified slot in the inventory (can be crafting or armor sections).
1055 */
1056 public void setInventorySlotContents(int par1, ItemStack par2ItemStack)
1057 {
1058 this.cargoItems[par1] = par2ItemStack;
1059
1060 if (par2ItemStack != null && par2ItemStack.stackSize > this.getInventoryStackLimit())
1061 {
1062 par2ItemStack.stackSize = this.getInventoryStackLimit();
1063 }
1064 }
1065
1066 /**
1067 * Returns the name of the inventory.
1068 */
1069 public String getInvName()
1070 {
1071 return "container.minecart";
1072 }
1073
1074 /**
1075 * Returns the maximum stack size for a inventory slot. Seems to always be 64, possibly will be extended. *Isn't
1076 * this more of a set than a get?*
1077 */
1078 public int getInventoryStackLimit()
1079 {
1080 return 64;
1081 }
1082
1083 /**
1084 * Called when an the contents of an Inventory change, usually
1085 */
1086 public void onInventoryChanged() {}
1087
1088 /**
1089 * Called when a player interacts with a mob. e.g. gets milk from a cow, gets into the saddle on a pig.
1090 */
1091 public boolean interact(EntityPlayer par1EntityPlayer)
1092 {
1093 if (MinecraftForge.EVENT_BUS.post(new MinecartInteractEvent(this, par1EntityPlayer)))
1094 {
1095 return true;
1096 }
1097
1098 if (canBeRidden())
1099 {
1100 if (this.riddenByEntity != null && this.riddenByEntity instanceof EntityPlayer && this.riddenByEntity != par1EntityPlayer)
1101 {
1102 return true;
1103 }
1104
1105 if (!this.worldObj.isRemote)
1106 {
1107 par1EntityPlayer.mountEntity(this);
1108 }
1109 }
1110 else if (getSizeInventory() > 0)
1111 {
1112 if (!this.worldObj.isRemote)
1113 {
1114 par1EntityPlayer.displayGUIChest(this);
1115 }
1116 }
1117 else if (this.minecartType == 2 && getClass() == EntityMinecart.class)
1118 {
1119 ItemStack var2 = par1EntityPlayer.inventory.getCurrentItem();
1120
1121 if (var2 != null && var2.itemID == Item.coal.shiftedIndex)
1122 {
1123 if (--var2.stackSize == 0)
1124 {
1125 par1EntityPlayer.inventory.setInventorySlotContents(par1EntityPlayer.inventory.currentItem, (ItemStack)null);
1126 }
1127
1128 this.fuel += 3600;
1129 }
1130
1131 this.pushX = this.posX - par1EntityPlayer.posX;
1132 this.pushZ = this.posZ - par1EntityPlayer.posZ;
1133 }
1134
1135 return true;
1136 }
1137
1138 @SideOnly(Side.CLIENT)
1139
1140 /**
1141 * Sets the position and rotation. Only difference from the other one is no bounding on the rotation. Args: posX,
1142 * posY, posZ, yaw, pitch
1143 */
1144 public void setPositionAndRotation2(double par1, double par3, double par5, float par7, float par8, int par9)
1145 {
1146 this.minecartX = par1;
1147 this.minecartY = par3;
1148 this.minecartZ = par5;
1149 this.minecartYaw = (double)par7;
1150 this.minecartPitch = (double)par8;
1151 this.turnProgress = par9 + 2;
1152 this.motionX = this.velocityX;
1153 this.motionY = this.velocityY;
1154 this.motionZ = this.velocityZ;
1155 }
1156
1157 @SideOnly(Side.CLIENT)
1158
1159 /**
1160 * Sets the velocity to the args. Args: x, y, z
1161 */
1162 public void setVelocity(double par1, double par3, double par5)
1163 {
1164 this.velocityX = this.motionX = par1;
1165 this.velocityY = this.motionY = par3;
1166 this.velocityZ = this.motionZ = par5;
1167 }
1168
1169 /**
1170 * Do not make give this method the name canInteractWith because it clashes with Container
1171 */
1172 public boolean isUseableByPlayer(EntityPlayer par1EntityPlayer)
1173 {
1174 return this.isDead ? false : par1EntityPlayer.getDistanceSqToEntity(this) <= 64.0D;
1175 }
1176
1177 /**
1178 * Is this minecart powered (Fuel > 0)
1179 */
1180 public boolean isMinecartPowered()
1181 {
1182 return (this.dataWatcher.getWatchableObjectByte(16) & 1) != 0;
1183 }
1184
1185 /**
1186 * Set if this minecart is powered (Fuel > 0)
1187 */
1188 protected void setMinecartPowered(boolean par1)
1189 {
1190 if (par1)
1191 {
1192 this.dataWatcher.updateObject(16, Byte.valueOf((byte)(this.dataWatcher.getWatchableObjectByte(16) | 1)));
1193 }
1194 else
1195 {
1196 this.dataWatcher.updateObject(16, Byte.valueOf((byte)(this.dataWatcher.getWatchableObjectByte(16) & -2)));
1197 }
1198 }
1199
1200 public void openChest() {}
1201
1202 public void closeChest() {}
1203
1204 /**
1205 * Sets the current amount of damage the minecart has taken. Decreases over time. The cart breaks when this is over
1206 * 40.
1207 */
1208 public void setDamage(int par1)
1209 {
1210 this.dataWatcher.updateObject(19, Integer.valueOf(par1));
1211 }
1212
1213 /**
1214 * Gets the current amount of damage the minecart has taken. Decreases over time. The cart breaks when this is over
1215 * 40.
1216 */
1217 public int getDamage()
1218 {
1219 return this.dataWatcher.getWatchableObjectInt(19);
1220 }
1221
1222 public void func_70497_h(int par1)
1223 {
1224 this.dataWatcher.updateObject(17, Integer.valueOf(par1));
1225 }
1226
1227 public int func_70496_j()
1228 {
1229 return this.dataWatcher.getWatchableObjectInt(17);
1230 }
1231
1232 public void func_70494_i(int par1)
1233 {
1234 this.dataWatcher.updateObject(18, Integer.valueOf(par1));
1235 }
1236
1237 public int func_70493_k()
1238 {
1239 return this.dataWatcher.getWatchableObjectInt(18);
1240 }
1241
1242 /**
1243 * Drops the cart as a item. The exact item dropped is defined by getItemDropped().
1244 */
1245 public void dropCartAsItem()
1246 {
1247 for(ItemStack item : getItemsDropped())
1248 {
1249 entityDropItem(item, 0);
1250 }
1251 }
1252
1253 /**
1254 * Override this to define which items your cart drops when broken.
1255 * This does not include items contained in the inventory,
1256 * that is handled elsewhere.
1257 * @return A list of items dropped.
1258 */
1259 public List<ItemStack> getItemsDropped()
1260 {
1261 List<ItemStack> items = new ArrayList<ItemStack>();
1262 items.add(new ItemStack(Item.minecartEmpty));
1263
1264 switch(minecartType)
1265 {
1266 case 1:
1267 items.add(new ItemStack(Block.chest));
1268 break;
1269 case 2:
1270 items.add(new ItemStack(Block.stoneOvenIdle));
1271 break;
1272 }
1273 return items;
1274 }
1275
1276 /**
1277 * This function returns an ItemStack that represents this cart.
1278 * This should be an ItemStack that can be used by the player to place the cart.
1279 * This is the item that was registered with the cart via the registerMinecart function,
1280 * but is not necessary the item the cart drops when destroyed.
1281 * @return An ItemStack that can be used to place the cart.
1282 */
1283 public ItemStack getCartItem()
1284 {
1285 return MinecartRegistry.getItemForCart(this);
1286 }
1287
1288 /**
1289 * Returns true if this cart is self propelled.
1290 * @return True if powered.
1291 */
1292 public boolean isPoweredCart()
1293 {
1294 return minecartType == 2 && getClass() == EntityMinecart.class;
1295 }
1296
1297 /**
1298 * Returns true if this cart is a storage cart
1299 * Some carts may have inventories but not be storage carts
1300 * and some carts without inventories may be storage carts.
1301 * @return True if this cart should be classified as a storage cart.
1302 */
1303 public boolean isStorageCart()
1304 {
1305 return minecartType == 1 && getClass() == EntityMinecart.class;
1306 }
1307
1308 /**
1309 * Returns true if this cart can be ridden by an Entity.
1310 * @return True if this cart can be ridden.
1311 */
1312 public boolean canBeRidden()
1313 {
1314 if(minecartType == 0 && getClass() == EntityMinecart.class)
1315 {
1316 return true;
1317 }
1318 return false;
1319 }
1320
1321 /**
1322 * Returns true if this cart can currently use rails.
1323 * This function is mainly used to gracefully detach a minecart from a rail.
1324 * @return True if the minecart can use rails.
1325 */
1326 public boolean canUseRail()
1327 {
1328 return canUseRail;
1329 }
1330
1331 /**
1332 * Set whether the minecart can use rails.
1333 * This function is mainly used to gracefully detach a minecart from a rail.
1334 * @param use Whether the minecart can currently use rails.
1335 */
1336 public void setCanUseRail(boolean use)
1337 {
1338 canUseRail = use;
1339 }
1340
1341 /**
1342 * Return false if this cart should not call IRail.onMinecartPass() and should ignore Powered Rails.
1343 * @return True if this cart should call IRail.onMinecartPass().
1344 */
1345 public boolean shouldDoRailFunctions()
1346 {
1347 return true;
1348 }
1349
1350 /**
1351 * Simply returns the minecartType variable.
1352 * @return minecartType
1353 */
1354 public int getMinecartType()
1355 {
1356 return minecartType;
1357 }
1358
1359 /**
1360 * Gets the current global Minecart Collision handler if none
1361 * is registered, returns null
1362 * @return The collision handler or null
1363 */
1364 public static IMinecartCollisionHandler getCollisionHandler()
1365 {
1366 return collisionHandler;
1367 }
1368
1369 /**
1370 * Sets the global Minecart Collision handler, overwrites any
1371 * that is currently set.
1372 * @param handler The new handler
1373 */
1374 public static void setCollisionHandler(IMinecartCollisionHandler handler)
1375 {
1376 collisionHandler = handler;
1377 }
1378
1379 /**
1380 * Carts should return their drag factor here
1381 * @return The drag rate.
1382 */
1383 protected double getDrag()
1384 {
1385 return riddenByEntity != null ? defaultDragRidden : defaultDragEmpty;
1386 }
1387
1388 /**
1389 * Moved to allow overrides.
1390 * This code applies drag and updates push forces.
1391 */
1392 protected void applyDragAndPushForces()
1393 {
1394 if(isPoweredCart())
1395 {
1396 double d27 = MathHelper.sqrt_double(pushX * pushX + pushZ * pushZ);
1397 if(d27 > 0.01D)
1398 {
1399 pushX /= d27;
1400 pushZ /= d27;
1401 double d29 = 0.04;
1402 motionX *= 0.8D;
1403 motionY *= 0.0D;
1404 motionZ *= 0.8D;
1405 motionX += pushX * d29;
1406 motionZ += pushZ * d29;
1407 }
1408 else
1409 {
1410 motionX *= 0.9D;
1411 motionY *= 0.0D;
1412 motionZ *= 0.9D;
1413 }
1414 }
1415 motionX *= getDrag();
1416 motionY *= 0.0D;
1417 motionZ *= getDrag();
1418 }
1419
1420 /**
1421 * Moved to allow overrides.
1422 * This code updates push forces.
1423 */
1424 protected void updatePushForces()
1425 {
1426 if(isPoweredCart())
1427 {
1428 double push = MathHelper.sqrt_double(pushX * pushX + pushZ * pushZ);
1429 if(push > 0.01D && motionX * motionX + motionZ * motionZ > 0.001D)
1430 {
1431 pushX /= push;
1432 pushZ /= push;
1433 if(pushX * motionX + pushZ * motionZ < 0.0D)
1434 {
1435 pushX = 0.0D;
1436 pushZ = 0.0D;
1437 }
1438 else
1439 {
1440 pushX = motionX;
1441 pushZ = motionZ;
1442 }
1443 }
1444 }
1445 }
1446
1447 /**
1448 * Moved to allow overrides.
1449 * This code handles minecart movement and speed capping when on a rail.
1450 */
1451 protected void moveMinecartOnRail(int i, int j, int k)
1452 {
1453 int id = worldObj.getBlockId(i, j, k);
1454 if (!BlockRail.isRailBlock(id))
1455 {
1456 return;
1457 }
1458 float railMaxSpeed = ((BlockRail)Block.blocksList[id]).getRailMaxSpeed(worldObj, this, i, j, k);
1459
1460 double maxSpeed = Math.min(railMaxSpeed, getMaxSpeedRail());
1461 double mX = motionX;
1462 double mZ = motionZ;
1463 if(riddenByEntity != null)
1464 {
1465 mX *= 0.75D;
1466 mZ *= 0.75D;
1467 }
1468 if(mX < -maxSpeed) mX = -maxSpeed;
1469 if(mX > maxSpeed) mX = maxSpeed;
1470 if(mZ < -maxSpeed) mZ = -maxSpeed;
1471 if(mZ > maxSpeed) mZ = maxSpeed;
1472 moveEntity(mX, 0.0D, mZ);
1473 }
1474
1475 /**
1476 * Moved to allow overrides.
1477 * This code handles minecart movement and speed capping when not on a rail.
1478 */
1479 protected void moveMinecartOffRail(int i, int j, int k)
1480 {
1481 double d2 = getMaxSpeedGround();
1482 if(!onGround)
1483 {
1484 d2 = getMaxSpeedAirLateral();
1485 }
1486 if(motionX < -d2) motionX = -d2;
1487 if(motionX > d2) motionX = d2;
1488 if(motionZ < -d2) motionZ = -d2;
1489 if(motionZ > d2) motionZ = d2;
1490 double moveY = motionY;
1491 if(getMaxSpeedAirVertical() > 0 && motionY > getMaxSpeedAirVertical())
1492 {
1493 moveY = getMaxSpeedAirVertical();
1494 if(Math.abs(motionX) < 0.3f && Math.abs(motionZ) < 0.3f)
1495 {
1496 moveY = 0.15f;
1497 motionY = moveY;
1498 }
1499 }
1500 if(onGround)
1501 {
1502 motionX *= 0.5D;
1503 motionY *= 0.5D;
1504 motionZ *= 0.5D;
1505 }
1506 moveEntity(motionX, moveY, motionZ);
1507 if(!onGround)
1508 {
1509 motionX *= getDragAir();
1510 motionY *= getDragAir();
1511 motionZ *= getDragAir();
1512 }
1513 }
1514
1515 /**
1516 * Moved to allow overrides.
1517 * This code applies fuel consumption.
1518 */
1519 protected void updateFuel()
1520 {
1521 if (fuel > 0) fuel--;
1522 if (fuel <= 0) pushX = pushZ = 0.0D;
1523 setMinecartPowered(fuel > 0);
1524 }
1525
1526 /**
1527 * Moved to allow overrides, This code handle slopes affecting velocity.
1528 * @param metadata The blocks position metadata
1529 */
1530 protected void adjustSlopeVelocities(int metadata)
1531 {
1532 double acceleration = 0.0078125D;
1533 if (metadata == 2)
1534 {
1535 motionX -= acceleration;
1536 }
1537 else if (metadata == 3)
1538 {
1539 motionX += acceleration;
1540 }
1541 else if (metadata == 4)
1542 {
1543 motionZ += acceleration;
1544 }
1545 else if (metadata == 5)
1546 {
1547 motionZ -= acceleration;
1548 }
1549 }
1550
1551 /**
1552 * Getters/setters for physics variables
1553 */
1554
1555 /**
1556 * Returns the carts max speed.
1557 * Carts going faster than 1.1 cause issues with chunk loading.
1558 * Carts cant traverse slopes or corners at greater than 0.5 - 0.6.
1559 * This value is compared with the rails max speed to determine
1560 * the carts current max speed. A normal rails max speed is 0.4.
1561 * @return Carts max speed.
1562 */
1563 public float getMaxSpeedRail()
1564 {
1565 return maxSpeedRail;
1566 }
1567
1568 public void setMaxSpeedRail(float value)
1569 {
1570 maxSpeedRail = value;
1571 }
1572
1573 public float getMaxSpeedGround()
1574 {
1575 return maxSpeedGround;
1576 }
1577
1578 public void setMaxSpeedGround(float value)
1579 {
1580 maxSpeedGround = value;
1581 }
1582
1583 public float getMaxSpeedAirLateral()
1584 {
1585 return maxSpeedAirLateral;
1586 }
1587
1588 public void setMaxSpeedAirLateral(float value)
1589 {
1590 maxSpeedAirLateral = value;
1591 }
1592
1593 public float getMaxSpeedAirVertical()
1594 {
1595 return maxSpeedAirVertical;
1596 }
1597
1598 public void setMaxSpeedAirVertical(float value)
1599 {
1600 maxSpeedAirVertical = value;
1601 }
1602
1603 public double getDragAir()
1604 {
1605 return dragAir;
1606 }
1607
1608 public void setDragAir(double value)
1609 {
1610 dragAir = value;
1611 }
1612 }