    001    package net.minecraft.src;
    002
    003    import cpw.mods.fml.common.Side;
    004    import cpw.mods.fml.common.asm.SideOnly;
    005    import java.util.ArrayList;
    006    import java.util.HashSet;
    007    import java.util.Random;
    008    import java.util.Set;
    009
    010    public class BlockRedstoneWire extends Block
    011    {
    012        /**
    013         * When false, power transmission methods do not look at other redstone wires. Used internally during
    014         * updateCurrentStrength.
    015         */
    016        private boolean wiresProvidePower = true;
    017        private Set blocksNeedingUpdate = new HashSet();
    018
    019        public BlockRedstoneWire(int par1, int par2)
    020        {
    021            super(par1, par2, Material.circuits);
    022            this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 0.0625F, 1.0F);
    023        }
    024
    025        /**
    026         * From the specified side and block metadata retrieves the blocks texture. Args: side, metadata
    027         */
    028        public int getBlockTextureFromSideAndMetadata(int par1, int par2)
    029        {
    030            return this.blockIndexInTexture;
    031        }
    032
    033        /**
    034         * Returns a bounding box from the pool of bounding boxes (this means this box can change after the pool has been
    035         * cleared to be reused)
    036         */
    037        public AxisAlignedBB getCollisionBoundingBoxFromPool(World par1World, int par2, int par3, int par4)
    038        {
    039            return null;
    040        }
    041
    042        /**
    043         * Is this block (a) opaque and (b) a full 1m cube?  This determines whether or not to render the shared face of two
    044         * adjacent blocks and also whether the player can attach torches, redstone wire, etc to this block.
    045         */
    046        public boolean isOpaqueCube()
    047        {
    048            return false;
    049        }
    050
    051        /**
    052         * If this block doesn't render as an ordinary block it will return False (examples: signs, buttons, stairs, etc)
    053         */
    054        public boolean renderAsNormalBlock()
    055        {
    056            return false;
    057        }
    058
    059        /**
    060         * The type of render function that is called for this block
    061         */
    062        public int getRenderType()
    063        {
    064            return 5;
    065        }
    066
    067        @SideOnly(Side.CLIENT)
    068
    069        /**
    070         * Returns a integer with hex for 0xrrggbb with this color multiplied against the blocks color. Note only called
    071         * when first determining what to render.
    072         */
    073        public int colorMultiplier(IBlockAccess par1IBlockAccess, int par2, int par3, int par4)
    074        {
    075            return 8388608;
    076        }
    077
    078        /**
    079         * Checks to see if its valid to put this block at the specified coordinates. Args: world, x, y, z
    080         */
    081        public boolean canPlaceBlockAt(World par1World, int par2, int par3, int par4)
    082        {
    083            return par1World.doesBlockHaveSolidTopSurface(par2, par3 - 1, par4) || par1World.getBlockId(par2, par3 - 1, par4) == Block.glowStone.blockID;
    084        }
    085
    086        /**
    087         * Sets the strength of the wire current (0-15) for this block based on neighboring blocks and propagates to
    088         * neighboring redstone wires
    089         */
    090        private void updateAndPropagateCurrentStrength(World par1World, int par2, int par3, int par4)
    091        {
    092            this.calculateCurrentChanges(par1World, par2, par3, par4, par2, par3, par4);
    093            ArrayList var5 = new ArrayList(this.blocksNeedingUpdate);
    094            this.blocksNeedingUpdate.clear();
    095
    096            for (int var6 = 0; var6 < var5.size(); ++var6)
    097            {
    098                ChunkPosition var7 = (ChunkPosition)var5.get(var6);
    099                par1World.notifyBlocksOfNeighborChange(var7.x, var7.y, var7.z, this.blockID);
    100            }
    101        }
    102
    103        private void calculateCurrentChanges(World par1World, int par2, int par3, int par4, int par5, int par6, int par7)
    104        {
    105            int var8 = par1World.getBlockMetadata(par2, par3, par4);
    106            int var9 = 0;
    107            this.wiresProvidePower = false;
    108            boolean var10 = par1World.isBlockIndirectlyGettingPowered(par2, par3, par4);
    109            this.wiresProvidePower = true;
    110            int var11;
    111            int var12;
    112            int var13;
    113
    114            if (var10)
    115            {
    116                var9 = 15;
    117            }
    118            else
    119            {
    120                for (var11 = 0; var11 < 4; ++var11)
    121                {
    122                    var12 = par2;
    123                    var13 = par4;
    124
    125                    if (var11 == 0)
    126                    {
    127                        var12 = par2 - 1;
    128                    }
    129
    130                    if (var11 == 1)
    131                    {
    132                        ++var12;
    133                    }
    134
    135                    if (var11 == 2)
    136                    {
    137                        var13 = par4 - 1;
    138                    }
    139
    140                    if (var11 == 3)
    141                    {
    142                        ++var13;
    143                    }
    144
    145                    if (var12 != par5 || par3 != par6 || var13 != par7)
    146                    {
    147                        var9 = this.getMaxCurrentStrength(par1World, var12, par3, var13, var9);
    148                    }
    149
    150                    if (par1World.isBlockNormalCube(var12, par3, var13) && !par1World.isBlockNormalCube(par2, par3 + 1, par4))
    151                    {
    152                        if (var12 != par5 || par3 + 1 != par6 || var13 != par7)
    153                        {
    154                            var9 = this.getMaxCurrentStrength(par1World, var12, par3 + 1, var13, var9);
    155                        }
    156                    }
    157                    else if (!par1World.isBlockNormalCube(var12, par3, var13) && (var12 != par5 || par3 - 1 != par6 || var13 != par7))
    158                    {
    159                        var9 = this.getMaxCurrentStrength(par1World, var12, par3 - 1, var13, var9);
    160                    }
    161                }
    162
    163                if (var9 > 0)
    164                {
    165                    --var9;
    166                }
    167                else
    168                {
    169                    var9 = 0;
    170                }
    171            }
    172
    173            if (var8 != var9)
    174            {
    175                par1World.editingBlocks = true;
    176                par1World.setBlockMetadataWithNotify(par2, par3, par4, var9);
    177                par1World.markBlocksDirty(par2, par3, par4, par2, par3, par4);
    178                par1World.editingBlocks = false;
    179
    180                for (var11 = 0; var11 < 4; ++var11)
    181                {
    182                    var12 = par2;
    183                    var13 = par4;
    184                    int var14 = par3 - 1;
    185
    186                    if (var11 == 0)
    187                    {
    188                        var12 = par2 - 1;
    189                    }
    190
    191                    if (var11 == 1)
    192                    {
    193                        ++var12;
    194                    }
    195
    196                    if (var11 == 2)
    197                    {
    198                        var13 = par4 - 1;
    199                    }
    200
    201                    if (var11 == 3)
    202                    {
    203                        ++var13;
    204                    }
    205
    206                    if (par1World.isBlockNormalCube(var12, par3, var13))
    207                    {
    208                        var14 += 2;
    209                    }
    210
    211                    boolean var15 = false;
    212                    int var16 = this.getMaxCurrentStrength(par1World, var12, par3, var13, -1);
    213                    var9 = par1World.getBlockMetadata(par2, par3, par4);
    214
    215                    if (var9 > 0)
    216                    {
    217                        --var9;
    218                    }
    219
    220                    if (var16 >= 0 && var16 != var9)
    221                    {
    222                        this.calculateCurrentChanges(par1World, var12, par3, var13, par2, par3, par4);
    223                    }
    224
    225                    var16 = this.getMaxCurrentStrength(par1World, var12, var14, var13, -1);
    226                    var9 = par1World.getBlockMetadata(par2, par3, par4);
    227
    228                    if (var9 > 0)
    229                    {
    230                        --var9;
    231                    }
    232
    233                    if (var16 >= 0 && var16 != var9)
    234                    {
    235                        this.calculateCurrentChanges(par1World, var12, var14, var13, par2, par3, par4);
    236                    }
    237                }
    238
    239                if (var8 < var9 || var9 == 0)
    240                {
    241                    this.blocksNeedingUpdate.add(new ChunkPosition(par2, par3, par4));
    242                    this.blocksNeedingUpdate.add(new ChunkPosition(par2 - 1, par3, par4));
    243                    this.blocksNeedingUpdate.add(new ChunkPosition(par2 + 1, par3, par4));
    244                    this.blocksNeedingUpdate.add(new ChunkPosition(par2, par3 - 1, par4));
    245                    this.blocksNeedingUpdate.add(new ChunkPosition(par2, par3 + 1, par4));
    246                    this.blocksNeedingUpdate.add(new ChunkPosition(par2, par3, par4 - 1));
    247                    this.blocksNeedingUpdate.add(new ChunkPosition(par2, par3, par4 + 1));
    248                }
    249            }
    250        }
    251
    252        /**
    253         * Calls World.notifyBlocksOfNeighborChange() for all neighboring blocks, but only if the given block is a redstone
    254         * wire.
    255         */
    256        private void notifyWireNeighborsOfNeighborChange(World par1World, int par2, int par3, int par4)
    257        {
    258            if (par1World.getBlockId(par2, par3, par4) == this.blockID)
    259            {
    260                par1World.notifyBlocksOfNeighborChange(par2, par3, par4, this.blockID);
    261                par1World.notifyBlocksOfNeighborChange(par2 - 1, par3, par4, this.blockID);
    262                par1World.notifyBlocksOfNeighborChange(par2 + 1, par3, par4, this.blockID);
    263                par1World.notifyBlocksOfNeighborChange(par2, par3, par4 - 1, this.blockID);
    264                par1World.notifyBlocksOfNeighborChange(par2, par3, par4 + 1, this.blockID);
    265                par1World.notifyBlocksOfNeighborChange(par2, par3 - 1, par4, this.blockID);
    266                par1World.notifyBlocksOfNeighborChange(par2, par3 + 1, par4, this.blockID);
    267            }
    268        }
    269
    270        /**
    271         * Called whenever the block is added into the world. Args: world, x, y, z
    272         */
    273        public void onBlockAdded(World par1World, int par2, int par3, int par4)
    274        {
    275            super.onBlockAdded(par1World, par2, par3, par4);
    276
    277            if (!par1World.isRemote)
    278            {
    279                this.updateAndPropagateCurrentStrength(par1World, par2, par3, par4);
    280                par1World.notifyBlocksOfNeighborChange(par2, par3 + 1, par4, this.blockID);
    281                par1World.notifyBlocksOfNeighborChange(par2, par3 - 1, par4, this.blockID);
    282                this.notifyWireNeighborsOfNeighborChange(par1World, par2 - 1, par3, par4);
    283                this.notifyWireNeighborsOfNeighborChange(par1World, par2 + 1, par3, par4);
    284                this.notifyWireNeighborsOfNeighborChange(par1World, par2, par3, par4 - 1);
    285                this.notifyWireNeighborsOfNeighborChange(par1World, par2, par3, par4 + 1);
    286
    287                if (par1World.isBlockNormalCube(par2 - 1, par3, par4))
    288                {
    289                    this.notifyWireNeighborsOfNeighborChange(par1World, par2 - 1, par3 + 1, par4);
    290                }
    291                else
    292                {
    293                    this.notifyWireNeighborsOfNeighborChange(par1World, par2 - 1, par3 - 1, par4);
    294                }
    295
    296                if (par1World.isBlockNormalCube(par2 + 1, par3, par4))
    297                {
    298                    this.notifyWireNeighborsOfNeighborChange(par1World, par2 + 1, par3 + 1, par4);
    299                }
    300                else
    301                {
    302                    this.notifyWireNeighborsOfNeighborChange(par1World, par2 + 1, par3 - 1, par4);
    303                }
    304
    305                if (par1World.isBlockNormalCube(par2, par3, par4 - 1))
    306                {
    307                    this.notifyWireNeighborsOfNeighborChange(par1World, par2, par3 + 1, par4 - 1);
    308                }
    309                else
    310                {
    311                    this.notifyWireNeighborsOfNeighborChange(par1World, par2, par3 - 1, par4 - 1);
    312                }
    313
    314                if (par1World.isBlockNormalCube(par2, par3, par4 + 1))
    315                {
    316                    this.notifyWireNeighborsOfNeighborChange(par1World, par2, par3 + 1, par4 + 1);
    317                }
    318                else
    319                {
    320                    this.notifyWireNeighborsOfNeighborChange(par1World, par2, par3 - 1, par4 + 1);
    321                }
    322            }
    323        }
    324
    325        /**
    326         * ejects contained items into the world, and notifies neighbours of an update, as appropriate
    327         */
    328        public void breakBlock(World par1World, int par2, int par3, int par4, int par5, int par6)
    329        {
    330            super.breakBlock(par1World, par2, par3, par4, par5, par6);
    331
    332            if (!par1World.isRemote)
    333            {
    334                par1World.notifyBlocksOfNeighborChange(par2, par3 + 1, par4, this.blockID);
    335                par1World.notifyBlocksOfNeighborChange(par2, par3 - 1, par4, this.blockID);
    336                par1World.notifyBlocksOfNeighborChange(par2 + 1, par3, par4, this.blockID);
    337                par1World.notifyBlocksOfNeighborChange(par2 - 1, par3, par4, this.blockID);
    338                par1World.notifyBlocksOfNeighborChange(par2, par3, par4 + 1, this.blockID);
    339                par1World.notifyBlocksOfNeighborChange(par2, par3, par4 - 1, this.blockID);
    340                this.updateAndPropagateCurrentStrength(par1World, par2, par3, par4);
    341                this.notifyWireNeighborsOfNeighborChange(par1World, par2 - 1, par3, par4);
    342                this.notifyWireNeighborsOfNeighborChange(par1World, par2 + 1, par3, par4);
    343                this.notifyWireNeighborsOfNeighborChange(par1World, par2, par3, par4 - 1);
    344                this.notifyWireNeighborsOfNeighborChange(par1World, par2, par3, par4 + 1);
    345
    346                if (par1World.isBlockNormalCube(par2 - 1, par3, par4))
    347                {
    348                    this.notifyWireNeighborsOfNeighborChange(par1World, par2 - 1, par3 + 1, par4);
    349                }
    350                else
    351                {
    352                    this.notifyWireNeighborsOfNeighborChange(par1World, par2 - 1, par3 - 1, par4);
    353                }
    354
    355                if (par1World.isBlockNormalCube(par2 + 1, par3, par4))
    356                {
    357                    this.notifyWireNeighborsOfNeighborChange(par1World, par2 + 1, par3 + 1, par4);
    358                }
    359                else
    360                {
    361                    this.notifyWireNeighborsOfNeighborChange(par1World, par2 + 1, par3 - 1, par4);
    362                }
    363
    364                if (par1World.isBlockNormalCube(par2, par3, par4 - 1))
    365                {
    366                    this.notifyWireNeighborsOfNeighborChange(par1World, par2, par3 + 1, par4 - 1);
    367                }
    368                else
    369                {
    370                    this.notifyWireNeighborsOfNeighborChange(par1World, par2, par3 - 1, par4 - 1);
    371                }
    372
    373                if (par1World.isBlockNormalCube(par2, par3, par4 + 1))
    374                {
    375                    this.notifyWireNeighborsOfNeighborChange(par1World, par2, par3 + 1, par4 + 1);
    376                }
    377                else
    378                {
    379                    this.notifyWireNeighborsOfNeighborChange(par1World, par2, par3 - 1, par4 + 1);
    380                }
    381            }
    382        }
    383
    384        /**
    385         * Returns the current strength at the specified block if it is greater than the passed value, or the passed value
    386         * otherwise. Signature: (world, x, y, z, strength)
    387         */
    388        private int getMaxCurrentStrength(World par1World, int par2, int par3, int par4, int par5)
    389        {
    390            if (par1World.getBlockId(par2, par3, par4) != this.blockID)
    391            {
    392                return par5;
    393            }
    394            else
    395            {
    396                int var6 = par1World.getBlockMetadata(par2, par3, par4);
    397                return var6 > par5 ? var6 : par5;
    398            }
    399        }
    400
    401        /**
    402         * Lets the block know when one of its neighbor changes. Doesn't know which neighbor changed (coordinates passed are
    403         * their own) Args: x, y, z, neighbor blockID
    404         */
    405        public void onNeighborBlockChange(World par1World, int par2, int par3, int par4, int par5)
    406        {
    407            if (!par1World.isRemote)
    408            {
    409                int var6 = par1World.getBlockMetadata(par2, par3, par4);
    410                boolean var7 = this.canPlaceBlockAt(par1World, par2, par3, par4);
    411
    412                if (var7)
    413                {
    414                    this.updateAndPropagateCurrentStrength(par1World, par2, par3, par4);
    415                }
    416                else
    417                {
    418                    this.dropBlockAsItem(par1World, par2, par3, par4, var6, 0);
    419                    par1World.setBlockWithNotify(par2, par3, par4, 0);
    420                }
    421
    422                super.onNeighborBlockChange(par1World, par2, par3, par4, par5);
    423            }
    424        }
    425
    426        /**
    427         * Returns the ID of the items to drop on destruction.
    428         */
    429        public int idDropped(int par1, Random par2Random, int par3)
    430        {
    431            return Item.redstone.shiftedIndex;
    432        }
    433
    434        /**
    435         * Is this block indirectly powering the block on the specified side
    436         */
    437        public boolean isIndirectlyPoweringTo(IBlockAccess par1IBlockAccess, int par2, int par3, int par4, int par5)
    438        {
    439            return !this.wiresProvidePower ? false : this.isPoweringTo(par1IBlockAccess, par2, par3, par4, par5);
    440        }
    441
    442        /**
    443         * Is this block powering the block on the specified side
    444         */
    445        public boolean isPoweringTo(IBlockAccess par1IBlockAccess, int par2, int par3, int par4, int par5)
    446        {
    447            if (!this.wiresProvidePower)
    448            {
    449                return false;
    450            }
    451            else if (par1IBlockAccess.getBlockMetadata(par2, par3, par4) == 0)
    452            {
    453                return false;
    454            }
    455            else if (par5 == 1)
    456            {
    457                return true;
    458            }
    459            else
    460            {
    461                boolean var6 = isPoweredOrRepeater(par1IBlockAccess, par2 - 1, par3, par4, 1) || !par1IBlockAccess.isBlockNormalCube(par2 - 1, par3, par4) && isPoweredOrRepeater(par1IBlockAccess, par2 - 1, par3 - 1, par4, -1);
    462                boolean var7 = isPoweredOrRepeater(par1IBlockAccess, par2 + 1, par3, par4, 3) || !par1IBlockAccess.isBlockNormalCube(par2 + 1, par3, par4) && isPoweredOrRepeater(par1IBlockAccess, par2 + 1, par3 - 1, par4, -1);
    463                boolean var8 = isPoweredOrRepeater(par1IBlockAccess, par2, par3, par4 - 1, 2) || !par1IBlockAccess.isBlockNormalCube(par2, par3, par4 - 1) && isPoweredOrRepeater(par1IBlockAccess, par2, par3 - 1, par4 - 1, -1);
    464                boolean var9 = isPoweredOrRepeater(par1IBlockAccess, par2, par3, par4 + 1, 0) || !par1IBlockAccess.isBlockNormalCube(par2, par3, par4 + 1) && isPoweredOrRepeater(par1IBlockAccess, par2, par3 - 1, par4 + 1, -1);
    465
    466                if (!par1IBlockAccess.isBlockNormalCube(par2, par3 + 1, par4))
    467                {
    468                    if (par1IBlockAccess.isBlockNormalCube(par2 - 1, par3, par4) && isPoweredOrRepeater(par1IBlockAccess, par2 - 1, par3 + 1, par4, -1))
    469                    {
    470                        var6 = true;
    471                    }
    472
    473                    if (par1IBlockAccess.isBlockNormalCube(par2 + 1, par3, par4) && isPoweredOrRepeater(par1IBlockAccess, par2 + 1, par3 + 1, par4, -1))
    474                    {
    475                        var7 = true;
    476                    }
    477
    478                    if (par1IBlockAccess.isBlockNormalCube(par2, par3, par4 - 1) && isPoweredOrRepeater(par1IBlockAccess, par2, par3 + 1, par4 - 1, -1))
    479                    {
    480                        var8 = true;
    481                    }
    482
    483                    if (par1IBlockAccess.isBlockNormalCube(par2, par3, par4 + 1) && isPoweredOrRepeater(par1IBlockAccess, par2, par3 + 1, par4 + 1, -1))
    484                    {
    485                        var9 = true;
    486                    }
    487                }
    488
    489                return !var8 && !var7 && !var6 && !var9 && par5 >= 2 && par5 <= 5 ? true : (par5 == 2 && var8 && !var6 && !var7 ? true : (par5 == 3 && var9 && !var6 && !var7 ? true : (par5 == 4 && var6 && !var8 && !var9 ? true : par5 == 5 && var7 && !var8 && !var9)));
    490            }
    491        }
    492
    493        /**
    494         * Can this block provide power. Only wire currently seems to have this change based on its state.
    495         */
    496        public boolean canProvidePower()
    497        {
    498            return this.wiresProvidePower;
    499        }
    500
    501        @SideOnly(Side.CLIENT)
    502
    503        /**
    504         * A randomly called display update to be able to add particles or other items for display
    505         */
    506        public void randomDisplayTick(World par1World, int par2, int par3, int par4, Random par5Random)
    507        {
    508            int var6 = par1World.getBlockMetadata(par2, par3, par4);
    509
    510            if (var6 > 0)
    511            {
    512                double var7 = (double)par2 + 0.5D + ((double)par5Random.nextFloat() - 0.5D) * 0.2D;
    513                double var9 = (double)((float)par3 + 0.0625F);
    514                double var11 = (double)par4 + 0.5D + ((double)par5Random.nextFloat() - 0.5D) * 0.2D;
    515                float var13 = (float)var6 / 15.0F;
    516                float var14 = var13 * 0.6F + 0.4F;
    517
    518                if (var6 == 0)
    519                {
    520                    var14 = 0.0F;
    521                }
    522
    523                float var15 = var13 * var13 * 0.7F - 0.5F;
    524                float var16 = var13 * var13 * 0.6F - 0.7F;
    525
    526                if (var15 < 0.0F)
    527                {
    528                    var15 = 0.0F;
    529                }
    530
    531                if (var16 < 0.0F)
    532                {
    533                    var16 = 0.0F;
    534                }
    535
    536                par1World.spawnParticle("reddust", var7, var9, var11, (double)var14, (double)var15, (double)var16);
    537            }
    538        }
    539
    540        /**
    541         * Returns true if the block coordinate passed can provide power, or is a redstone wire.
    542         */
    543        public static boolean isPowerProviderOrWire(IBlockAccess par0IBlockAccess, int par1, int par2, int par3, int par4)
    544        {
    545            int var5 = par0IBlockAccess.getBlockId(par1, par2, par3);
    546
    547            if (var5 == Block.redstoneWire.blockID)
    548            {
    549                return true;
    550            }
    551            else if (var5 == 0)
    552            {
    553                return false;
    554            }
    555            else if (var5 != Block.redstoneRepeaterIdle.blockID && var5 != Block.redstoneRepeaterActive.blockID)
    556            {
    557                return (Block.blocksList[var5] != null && Block.blocksList[var5].canConnectRedstone(par0IBlockAccess, par1, par2, par3, par4));
    558            }
    559            else
    560            {
    561                int var6 = par0IBlockAccess.getBlockMetadata(par1, par2, par3);
    562                return par4 == (var6 & 3) || par4 == Direction.footInvisibleFaceRemap[var6 & 3];
    563            }
    564        }
    565
    566        /**
    567         * Returns true if the block coordinate passed can provide power, or is a redstone wire, or if its a repeater that
    568         * is powered.
    569         */
    570        public static boolean isPoweredOrRepeater(IBlockAccess par0IBlockAccess, int par1, int par2, int par3, int par4)
    571        {
    572            if (isPowerProviderOrWire(par0IBlockAccess, par1, par2, par3, par4))
    573            {
    574                return true;
    575            }
    576            else
    577            {
    578                int var5 = par0IBlockAccess.getBlockId(par1, par2, par3);
    579
    580                if (var5 == Block.redstoneRepeaterActive.blockID)
    581                {
    582                    int var6 = par0IBlockAccess.getBlockMetadata(par1, par2, par3);
    583                    return par4 == (var6 & 3);
    584                }
    585                else
    586                {
    587                    return false;
    588                }
    589            }
    590        }
    591
    592        @SideOnly(Side.CLIENT)
    593
    594        /**
    595         * only called by clickMiddleMouseButton , and passed to inventory.setCurrentItem (along with isCreative)
    596         */
    597        public int idPicked(World par1World, int par2, int par3, int par4)
    598        {
    599            return Item.redstone.shiftedIndex;
    600        }
    601    }