001package net.minecraft.block;
002
003import cpw.mods.fml.relauncher.Side;
004import cpw.mods.fml.relauncher.SideOnly;
005import java.util.List;
006import net.minecraft.block.material.Material;
007import net.minecraft.client.renderer.texture.IconRegister;
008import net.minecraft.creativetab.CreativeTabs;
009import net.minecraft.entity.Entity;
010import net.minecraft.entity.EntityLiving;
011import net.minecraft.entity.player.EntityPlayer;
012import net.minecraft.item.ItemStack;
013import net.minecraft.tileentity.TileEntity;
014import net.minecraft.tileentity.TileEntityPiston;
015import net.minecraft.util.AxisAlignedBB;
016import net.minecraft.util.Facing;
017import net.minecraft.util.Icon;
018import net.minecraft.util.MathHelper;
019import net.minecraft.world.IBlockAccess;
020import net.minecraft.world.World;
021
022public class BlockPistonBase extends Block
023{
024    /** This pistons is the sticky one? */
025    private final boolean isSticky;
026    @SideOnly(Side.CLIENT)
027    private Icon field_94498_b;
028    @SideOnly(Side.CLIENT)
029    private Icon field_94499_c;
030    @SideOnly(Side.CLIENT)
031    private Icon field_94497_cO;
032
033    public BlockPistonBase(int par1, boolean par2)
034    {
035        super(par1, Material.piston);
036        this.isSticky = par2;
037        this.setStepSound(soundStoneFootstep);
038        this.setHardness(0.5F);
039        this.setCreativeTab(CreativeTabs.tabRedstone);
040    }
041
042    @SideOnly(Side.CLIENT)
043
044    /**
045     * Return the either 106 or 107 as the texture index depending on the isSticky flag. This will actually never get
046     * called by TileEntityRendererPiston.renderPiston() because TileEntityPiston.shouldRenderHead() will always return
047     * false.
048     */
049    public Icon getPistonExtensionTexture()
050    {
051        return this.field_94497_cO;
052    }
053
054    @SideOnly(Side.CLIENT)
055    public void func_96479_b(float par1, float par2, float par3, float par4, float par5, float par6)
056    {
057        this.setBlockBounds(par1, par2, par3, par4, par5, par6);
058    }
059
060    @SideOnly(Side.CLIENT)
061
062    /**
063     * From the specified side and block metadata retrieves the blocks texture. Args: side, metadata
064     */
065    public Icon getBlockTextureFromSideAndMetadata(int par1, int par2)
066    {
067        int k = getOrientation(par2);
068        return k > 5 ? this.field_94497_cO : (par1 == k ? (!isExtended(par2) && this.minX <= 0.0D && this.minY <= 0.0D && this.minZ <= 0.0D && this.maxX >= 1.0D && this.maxY >= 1.0D && this.maxZ >= 1.0D ? this.field_94497_cO : this.field_94498_b) : (par1 == Facing.faceToSide[k] ? this.field_94499_c : this.field_94336_cN));
069    }
070
071    @SideOnly(Side.CLIENT)
072    public static Icon func_94496_b(String par0Str)
073    {
074        return par0Str == "piston_side" ? Block.pistonBase.field_94336_cN : (par0Str == "piston_top" ? Block.pistonBase.field_94497_cO : (par0Str == "piston_top_sticky" ? Block.pistonStickyBase.field_94497_cO : (par0Str == "piston_inner_top" ? Block.pistonBase.field_94498_b : null)));
075    }
076
077    @SideOnly(Side.CLIENT)
078    public void func_94332_a(IconRegister par1IconRegister)
079    {
080        this.field_94336_cN = par1IconRegister.func_94245_a("piston_side");
081        this.field_94497_cO = par1IconRegister.func_94245_a(this.isSticky ? "piston_top_sticky" : "piston_top");
082        this.field_94498_b = par1IconRegister.func_94245_a("piston_inner_top");
083        this.field_94499_c = par1IconRegister.func_94245_a("piston_bottom");
084    }
085
086    /**
087     * The type of render function that is called for this block
088     */
089    public int getRenderType()
090    {
091        return 16;
092    }
093
094    /**
095     * Is this block (a) opaque and (b) a full 1m cube?  This determines whether or not to render the shared face of two
096     * adjacent blocks and also whether the player can attach torches, redstone wire, etc to this block.
097     */
098    public boolean isOpaqueCube()
099    {
100        return false;
101    }
102
103    /**
104     * Called upon block activation (right click on the block.)
105     */
106    public boolean onBlockActivated(World par1World, int par2, int par3, int par4, EntityPlayer par5EntityPlayer, int par6, float par7, float par8, float par9)
107    {
108        return false;
109    }
110
111    /**
112     * Called when the block is placed in the world.
113     */
114    public void onBlockPlacedBy(World par1World, int par2, int par3, int par4, EntityLiving par5EntityLiving, ItemStack par6ItemStack)
115    {
116        int l = determineOrientation(par1World, par2, par3, par4, par5EntityLiving);
117        par1World.setBlockMetadataWithNotify(par2, par3, par4, l, 2);
118
119        if (!par1World.isRemote)
120        {
121            this.updatePistonState(par1World, par2, par3, par4);
122        }
123    }
124
125    /**
126     * Lets the block know when one of its neighbor changes. Doesn't know which neighbor changed (coordinates passed are
127     * their own) Args: x, y, z, neighbor blockID
128     */
129    public void onNeighborBlockChange(World par1World, int par2, int par3, int par4, int par5)
130    {
131        if (!par1World.isRemote)
132        {
133            this.updatePistonState(par1World, par2, par3, par4);
134        }
135    }
136
137    /**
138     * Called whenever the block is added into the world. Args: world, x, y, z
139     */
140    public void onBlockAdded(World par1World, int par2, int par3, int par4)
141    {
142        if (!par1World.isRemote && par1World.getBlockTileEntity(par2, par3, par4) == null)
143        {
144            this.updatePistonState(par1World, par2, par3, par4);
145        }
146    }
147
148    /**
149     * handles attempts to extend or retract the piston.
150     */
151    private void updatePistonState(World par1World, int par2, int par3, int par4)
152    {
153        int l = par1World.getBlockMetadata(par2, par3, par4);
154        int i1 = getOrientation(l);
155
156        if (i1 != 7)
157        {
158            boolean flag = this.isIndirectlyPowered(par1World, par2, par3, par4, i1);
159
160            if (flag && !isExtended(l))
161            {
162                if (canExtend(par1World, par2, par3, par4, i1))
163                {
164                    par1World.addBlockEvent(par2, par3, par4, this.blockID, 0, i1);
165                }
166            }
167            else if (!flag && isExtended(l))
168            {
169                par1World.setBlockMetadataWithNotify(par2, par3, par4, i1, 2);
170                par1World.addBlockEvent(par2, par3, par4, this.blockID, 1, i1);
171            }
172        }
173    }
174
175    /**
176     * checks the block to that side to see if it is indirectly powered.
177     */
178    private boolean isIndirectlyPowered(World par1World, int par2, int par3, int par4, int par5)
179    {
180        return par5 != 0 && par1World.func_94574_k(par2, par3 - 1, par4, 0) ? true : (par5 != 1 && par1World.func_94574_k(par2, par3 + 1, par4, 1) ? true : (par5 != 2 && par1World.func_94574_k(par2, par3, par4 - 1, 2) ? true : (par5 != 3 && par1World.func_94574_k(par2, par3, par4 + 1, 3) ? true : (par5 != 5 && par1World.func_94574_k(par2 + 1, par3, par4, 5) ? true : (par5 != 4 && par1World.func_94574_k(par2 - 1, par3, par4, 4) ? true : (par1World.func_94574_k(par2, par3, par4, 0) ? true : (par1World.func_94574_k(par2, par3 + 2, par4, 1) ? true : (par1World.func_94574_k(par2, par3 + 1, par4 - 1, 2) ? true : (par1World.func_94574_k(par2, par3 + 1, par4 + 1, 3) ? true : (par1World.func_94574_k(par2 - 1, par3 + 1, par4, 4) ? true : par1World.func_94574_k(par2 + 1, par3 + 1, par4, 5)))))))))));
181    }
182
183    /**
184     * Called when the block receives a BlockEvent - see World.addBlockEvent. By default, passes it on to the tile
185     * entity at this location. Args: world, x, y, z, blockID, EventID, event parameter
186     */
187    public boolean onBlockEventReceived(World par1World, int par2, int par3, int par4, int par5, int par6)
188    {
189        if (!par1World.isRemote)
190        {
191            boolean flag = this.isIndirectlyPowered(par1World, par2, par3, par4, par6);
192
193            if (flag && par5 == 1)
194            {
195                par1World.setBlockMetadataWithNotify(par2, par3, par4, par6 | 8, 2);
196                return false;
197            }
198
199            if (!flag && par5 == 0)
200            {
201                return false;
202            }
203        }
204
205        if (par5 == 0)
206        {
207            if (!this.tryExtend(par1World, par2, par3, par4, par6))
208            {
209                return false;
210            }
211
212            par1World.setBlockMetadataWithNotify(par2, par3, par4, par6 | 8, 2);
213            par1World.playSoundEffect((double)par2 + 0.5D, (double)par3 + 0.5D, (double)par4 + 0.5D, "tile.piston.out", 0.5F, par1World.rand.nextFloat() * 0.25F + 0.6F);
214        }
215        else if (par5 == 1)
216        {
217            TileEntity tileentity = par1World.getBlockTileEntity(par2 + Facing.offsetsXForSide[par6], par3 + Facing.offsetsYForSide[par6], par4 + Facing.offsetsZForSide[par6]);
218
219            if (tileentity instanceof TileEntityPiston)
220            {
221                ((TileEntityPiston)tileentity).clearPistonTileEntity();
222            }
223
224            par1World.setBlockAndMetadataWithNotify(par2, par3, par4, Block.pistonMoving.blockID, par6, 3);
225            par1World.setBlockTileEntity(par2, par3, par4, BlockPistonMoving.getTileEntity(this.blockID, par6, par6, false, true));
226
227            if (this.isSticky)
228            {
229                int j1 = par2 + Facing.offsetsXForSide[par6] * 2;
230                int k1 = par3 + Facing.offsetsYForSide[par6] * 2;
231                int l1 = par4 + Facing.offsetsZForSide[par6] * 2;
232                int i2 = par1World.getBlockId(j1, k1, l1);
233                int j2 = par1World.getBlockMetadata(j1, k1, l1);
234                boolean flag1 = false;
235
236                if (i2 == Block.pistonMoving.blockID)
237                {
238                    TileEntity tileentity1 = par1World.getBlockTileEntity(j1, k1, l1);
239
240                    if (tileentity1 instanceof TileEntityPiston)
241                    {
242                        TileEntityPiston tileentitypiston = (TileEntityPiston)tileentity1;
243
244                        if (tileentitypiston.getPistonOrientation() == par6 && tileentitypiston.isExtending())
245                        {
246                            tileentitypiston.clearPistonTileEntity();
247                            i2 = tileentitypiston.getStoredBlockID();
248                            j2 = tileentitypiston.getBlockMetadata();
249                            flag1 = true;
250                        }
251                    }
252                }
253
254                if (!flag1 && i2 > 0 && canPushBlock(i2, par1World, j1, k1, l1, false) && (Block.blocksList[i2].getMobilityFlag() == 0 || i2 == Block.pistonBase.blockID || i2 == Block.pistonStickyBase.blockID))
255                {
256                    par2 += Facing.offsetsXForSide[par6];
257                    par3 += Facing.offsetsYForSide[par6];
258                    par4 += Facing.offsetsZForSide[par6];
259                    par1World.setBlockAndMetadataWithNotify(par2, par3, par4, Block.pistonMoving.blockID, j2, 3);
260                    par1World.setBlockTileEntity(par2, par3, par4, BlockPistonMoving.getTileEntity(i2, j2, par6, false, false));
261                    par1World.func_94571_i(j1, k1, l1);
262                }
263                else if (!flag1)
264                {
265                    par1World.func_94571_i(par2 + Facing.offsetsXForSide[par6], par3 + Facing.offsetsYForSide[par6], par4 + Facing.offsetsZForSide[par6]);
266                }
267            }
268            else
269            {
270                par1World.func_94571_i(par2 + Facing.offsetsXForSide[par6], par3 + Facing.offsetsYForSide[par6], par4 + Facing.offsetsZForSide[par6]);
271            }
272
273            par1World.playSoundEffect((double)par2 + 0.5D, (double)par3 + 0.5D, (double)par4 + 0.5D, "tile.piston.in", 0.5F, par1World.rand.nextFloat() * 0.15F + 0.6F);
274        }
275
276        return true;
277    }
278
279    /**
280     * Updates the blocks bounds based on its current state. Args: world, x, y, z
281     */
282    public void setBlockBoundsBasedOnState(IBlockAccess par1IBlockAccess, int par2, int par3, int par4)
283    {
284        int l = par1IBlockAccess.getBlockMetadata(par2, par3, par4);
285
286        if (isExtended(l))
287        {
288            switch (getOrientation(l))
289            {
290                case 0:
291                    this.setBlockBounds(0.0F, 0.25F, 0.0F, 1.0F, 1.0F, 1.0F);
292                    break;
293                case 1:
294                    this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 0.75F, 1.0F);
295                    break;
296                case 2:
297                    this.setBlockBounds(0.0F, 0.0F, 0.25F, 1.0F, 1.0F, 1.0F);
298                    break;
299                case 3:
300                    this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 1.0F, 0.75F);
301                    break;
302                case 4:
303                    this.setBlockBounds(0.25F, 0.0F, 0.0F, 1.0F, 1.0F, 1.0F);
304                    break;
305                case 5:
306                    this.setBlockBounds(0.0F, 0.0F, 0.0F, 0.75F, 1.0F, 1.0F);
307            }
308        }
309        else
310        {
311            this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 1.0F, 1.0F);
312        }
313    }
314
315    /**
316     * Sets the block's bounds for rendering it as an item
317     */
318    public void setBlockBoundsForItemRender()
319    {
320        this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 1.0F, 1.0F);
321    }
322
323    /**
324     * Adds all intersecting collision boxes to a list. (Be sure to only add boxes to the list if they intersect the
325     * mask.) Parameters: World, X, Y, Z, mask, list, colliding entity
326     */
327    public void addCollisionBoxesToList(World par1World, int par2, int par3, int par4, AxisAlignedBB par5AxisAlignedBB, List par6List, Entity par7Entity)
328    {
329        this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 1.0F, 1.0F);
330        super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
331    }
332
333    /**
334     * Returns a bounding box from the pool of bounding boxes (this means this box can change after the pool has been
335     * cleared to be reused)
336     */
337    public AxisAlignedBB getCollisionBoundingBoxFromPool(World par1World, int par2, int par3, int par4)
338    {
339        this.setBlockBoundsBasedOnState(par1World, par2, par3, par4);
340        return super.getCollisionBoundingBoxFromPool(par1World, par2, par3, par4);
341    }
342
343    /**
344     * If this block doesn't render as an ordinary block it will return False (examples: signs, buttons, stairs, etc)
345     */
346    public boolean renderAsNormalBlock()
347    {
348        return false;
349    }
350
351    /**
352     * returns an int which describes the direction the piston faces
353     */
354    public static int getOrientation(int par0)
355    {
356        return par0 & 7;
357    }
358
359    /**
360     * Determine if the metadata is related to something powered.
361     */
362    public static boolean isExtended(int par0)
363    {
364        return (par0 & 8) != 0;
365    }
366
367    /**
368     * gets the way this piston should face for that entity that placed it.
369     */
370    public static int determineOrientation(World par0World, int par1, int par2, int par3, EntityLiving par4EntityLiving)
371    {
372        if (MathHelper.abs((float)par4EntityLiving.posX - (float)par1) < 2.0F && MathHelper.abs((float)par4EntityLiving.posZ - (float)par3) < 2.0F)
373        {
374            double d0 = par4EntityLiving.posY + 1.82D - (double)par4EntityLiving.yOffset;
375
376            if (d0 - (double)par2 > 2.0D)
377            {
378                return 1;
379            }
380
381            if ((double)par2 - d0 > 0.0D)
382            {
383                return 0;
384            }
385        }
386
387        int l = MathHelper.floor_double((double)(par4EntityLiving.rotationYaw * 4.0F / 360.0F) + 0.5D) & 3;
388        return l == 0 ? 2 : (l == 1 ? 5 : (l == 2 ? 3 : (l == 3 ? 4 : 0)));
389    }
390
391    /**
392     * returns true if the piston can push the specified block
393     */
394    private static boolean canPushBlock(int par0, World par1World, int par2, int par3, int par4, boolean par5)
395    {
396        if (par0 == Block.obsidian.blockID)
397        {
398            return false;
399        }
400        else
401        {
402            if (par0 != Block.pistonBase.blockID && par0 != Block.pistonStickyBase.blockID)
403            {
404                if (Block.blocksList[par0].getBlockHardness(par1World, par2, par3, par4) == -1.0F)
405                {
406                    return false;
407                }
408
409                if (Block.blocksList[par0].getMobilityFlag() == 2)
410                {
411                    return false;
412                }
413
414                if (Block.blocksList[par0].getMobilityFlag() == 1)
415                {
416                    if (!par5)
417                    {
418                        return false;
419                    }
420
421                    return true;
422                }
423            }
424            else if (isExtended(par1World.getBlockMetadata(par2, par3, par4)))
425            {
426                return false;
427            }
428
429            return !par1World.blockHasTileEntity(par2, par3, par4);
430        }
431    }
432
433    /**
434     * checks to see if this piston could push the blocks in front of it.
435     */
436    private static boolean canExtend(World par0World, int par1, int par2, int par3, int par4)
437    {
438        int i1 = par1 + Facing.offsetsXForSide[par4];
439        int j1 = par2 + Facing.offsetsYForSide[par4];
440        int k1 = par3 + Facing.offsetsZForSide[par4];
441        int l1 = 0;
442
443        while (true)
444        {
445            if (l1 < 13)
446            {
447                if (j1 <= 0 || j1 >= par0World.getHeight() - 1)
448                {
449                    return false;
450                }
451
452                int i2 = par0World.getBlockId(i1, j1, k1);
453
454                if (i2 != 0)
455                {
456                    if (!canPushBlock(i2, par0World, i1, j1, k1, true))
457                    {
458                        return false;
459                    }
460
461                    if (Block.blocksList[i2].getMobilityFlag() != 1)
462                    {
463                        if (l1 == 12)
464                        {
465                            return false;
466                        }
467
468                        i1 += Facing.offsetsXForSide[par4];
469                        j1 += Facing.offsetsYForSide[par4];
470                        k1 += Facing.offsetsZForSide[par4];
471                        ++l1;
472                        continue;
473                    }
474                }
475            }
476
477            return true;
478        }
479    }
480
481    /**
482     * attempts to extend the piston. returns false if impossible.
483     */
484    private boolean tryExtend(World par1World, int par2, int par3, int par4, int par5)
485    {
486        int i1 = par2 + Facing.offsetsXForSide[par5];
487        int j1 = par3 + Facing.offsetsYForSide[par5];
488        int k1 = par4 + Facing.offsetsZForSide[par5];
489        int l1 = 0;
490
491        while (true)
492        {
493            int i2;
494
495            if (l1 < 13)
496            {
497                if (j1 <= 0 || j1 >= par1World.getHeight() - 1)
498                {
499                    return false;
500                }
501
502                i2 = par1World.getBlockId(i1, j1, k1);
503
504                if (i2 != 0)
505                {
506                    if (!canPushBlock(i2, par1World, i1, j1, k1, true))
507                    {
508                        return false;
509                    }
510
511                    if (Block.blocksList[i2].getMobilityFlag() != 1)
512                    {
513                        if (l1 == 12)
514                        {
515                            return false;
516                        }
517
518                        i1 += Facing.offsetsXForSide[par5];
519                        j1 += Facing.offsetsYForSide[par5];
520                        k1 += Facing.offsetsZForSide[par5];
521                        ++l1;
522                        continue;
523                    }
524
525                    //With our change to how snowballs are dropped this needs to dissallow to mimic vanilla behavior.
526                    float chance = (Block.blocksList[i2] instanceof BlockSnow ? -1.0f : 1.0f);
527                    Block.blocksList[i2].dropBlockAsItemWithChance(par1World, i1, j1, k1, par1World.getBlockMetadata(i1, j1, k1), chance, 0);
528                    par1World.func_94571_i(i1, j1, k1);
529                }
530            }
531
532            l1 = i1;
533            i2 = j1;
534            int j2 = k1;
535            int k2 = 0;
536            int[] aint;
537            int l2;
538            int i3;
539            int j3;
540
541            for (aint = new int[13]; i1 != par2 || j1 != par3 || k1 != par4; k1 = j3)
542            {
543                l2 = i1 - Facing.offsetsXForSide[par5];
544                i3 = j1 - Facing.offsetsYForSide[par5];
545                j3 = k1 - Facing.offsetsZForSide[par5];
546                int k3 = par1World.getBlockId(l2, i3, j3);
547                int l3 = par1World.getBlockMetadata(l2, i3, j3);
548
549                if (k3 == this.blockID && l2 == par2 && i3 == par3 && j3 == par4)
550                {
551                    par1World.setBlockAndMetadataWithNotify(i1, j1, k1, Block.pistonMoving.blockID, par5 | (this.isSticky ? 8 : 0), 4);
552                    par1World.setBlockTileEntity(i1, j1, k1, BlockPistonMoving.getTileEntity(Block.pistonExtension.blockID, par5 | (this.isSticky ? 8 : 0), par5, true, false));
553                }
554                else
555                {
556                    par1World.setBlockAndMetadataWithNotify(i1, j1, k1, Block.pistonMoving.blockID, l3, 4);
557                    par1World.setBlockTileEntity(i1, j1, k1, BlockPistonMoving.getTileEntity(k3, l3, par5, true, false));
558                }
559
560                aint[k2++] = k3;
561                i1 = l2;
562                j1 = i3;
563            }
564
565            i1 = l1;
566            j1 = i2;
567            k1 = j2;
568
569            for (k2 = 0; i1 != par2 || j1 != par3 || k1 != par4; k1 = j3)
570            {
571                l2 = i1 - Facing.offsetsXForSide[par5];
572                i3 = j1 - Facing.offsetsYForSide[par5];
573                j3 = k1 - Facing.offsetsZForSide[par5];
574                par1World.notifyBlocksOfNeighborChange(l2, i3, j3, aint[k2++]);
575                i1 = l2;
576                j1 = i3;
577            }
578
579            return true;
580        }
581    }
582}