    001    package net.minecraft.block;
    002
    003    import cpw.mods.fml.relauncher.Side;
    004    import cpw.mods.fml.relauncher.SideOnly;
    005    import java.util.Random;
    006    import net.minecraft.block.material.Material;
    007    import net.minecraft.entity.EntityLiving;
    008    import net.minecraft.entity.player.EntityPlayer;
    009    import net.minecraft.item.Item;
    010    import net.minecraft.util.Direction;
    011    import net.minecraft.util.MathHelper;
    012    import net.minecraft.world.IBlockAccess;
    013    import net.minecraft.world.World;
    014
    015    public class BlockRedstoneRepeater extends BlockDirectional
    016    {
    017        /** The offsets for the two torches in redstone repeater blocks. */
    018        public static final double[] repeaterTorchOffset = new double[] { -0.0625D, 0.0625D, 0.1875D, 0.3125D};
    019
    020        /** The states in which the redstone repeater blocks can be. */
    021        private static final int[] repeaterState = new int[] {1, 2, 3, 4};
    022
    023        /** Tells whether the repeater is powered or not */
    024        private final boolean isRepeaterPowered;
    025
    026        protected BlockRedstoneRepeater(int par1, boolean par2)
    027        {
    028            super(par1, 6, Material.circuits);
    029            this.isRepeaterPowered = par2;
    030            this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 0.125F, 1.0F);
    031        }
    032
    033        /**
    034         * If this block doesn't render as an ordinary block it will return False (examples: signs, buttons, stairs, etc)
    035         */
    036        public boolean renderAsNormalBlock()
    037        {
    038            return false;
    039        }
    040
    041        /**
    042         * Checks to see if its valid to put this block at the specified coordinates. Args: world, x, y, z
    043         */
    044        public boolean canPlaceBlockAt(World par1World, int par2, int par3, int par4)
    045        {
    046            return !par1World.doesBlockHaveSolidTopSurface(par2, par3 - 1, par4) ? false : super.canPlaceBlockAt(par1World, par2, par3, par4);
    047        }
    048
    049        /**
    050         * Can this block stay at this position.  Similar to canPlaceBlockAt except gets checked often with plants.
    051         */
    052        public boolean canBlockStay(World par1World, int par2, int par3, int par4)
    053        {
    054            return !par1World.doesBlockHaveSolidTopSurface(par2, par3 - 1, par4) ? false : super.canBlockStay(par1World, par2, par3, par4);
    055        }
    056
    057        /**
    058         * Ticks the block if it's been scheduled
    059         */
    060        public void updateTick(World par1World, int par2, int par3, int par4, Random par5Random)
    061        {
    062            int var6 = par1World.getBlockMetadata(par2, par3, par4);
    063            boolean var7 = this.func_82523_e(par1World, par2, par3, par4, var6);
    064
    065            if (!var7)
    066            {
    067                boolean var8 = this.ignoreTick(par1World, par2, par3, par4, var6);
    068
    069                if (this.isRepeaterPowered && !var8)
    070                {
    071                    par1World.setBlockAndMetadataWithNotify(par2, par3, par4, Block.redstoneRepeaterIdle.blockID, var6);
    072                }
    073                else if (!this.isRepeaterPowered)
    074                {
    075                    par1World.setBlockAndMetadataWithNotify(par2, par3, par4, Block.redstoneRepeaterActive.blockID, var6);
    076
    077                    if (!var8)
    078                    {
    079                        int var9 = (var6 & 12) >> 2;
    080                        par1World.scheduleBlockUpdate(par2, par3, par4, Block.redstoneRepeaterActive.blockID, repeaterState[var9] * 2);
    081                    }
    082                }
    083            }
    084        }
    085
    086        /**
    087         * From the specified side and block metadata retrieves the blocks texture. Args: side, metadata
    088         */
    089        public int getBlockTextureFromSideAndMetadata(int par1, int par2)
    090        {
    091            return par1 == 0 ? (this.isRepeaterPowered ? 99 : 115) : (par1 == 1 ? (this.isRepeaterPowered ? 147 : 131) : 5);
    092        }
    093
    094        @SideOnly(Side.CLIENT)
    095
    096        /**
    097         * Returns true if the given side of this block type should be rendered, if the adjacent block is at the given
    098         * coordinates.  Args: blockAccess, x, y, z, side
    099         */
    100        public boolean shouldSideBeRendered(IBlockAccess par1IBlockAccess, int par2, int par3, int par4, int par5)
    101        {
    102            return par5 != 0 && par5 != 1;
    103        }
    104
    105        /**
    106         * The type of render function that is called for this block
    107         */
    108        public int getRenderType()
    109        {
    110            return 15;
    111        }
    112
    113        /**
    114         * Returns the block texture based on the side being looked at.  Args: side
    115         */
    116        public int getBlockTextureFromSide(int par1)
    117        {
    118            return this.getBlockTextureFromSideAndMetadata(par1, 0);
    119        }
    120
    121        /**
    122         * Returns true if the block is emitting direct/strong redstone power on the specified side. Args: World, X, Y, Z,
    123         * side
    124         */
    125        public boolean isProvidingStrongPower(IBlockAccess par1IBlockAccess, int par2, int par3, int par4, int par5)
    126        {
    127            return this.isProvidingWeakPower(par1IBlockAccess, par2, par3, par4, par5);
    128        }
    129
    130        /**
    131         * Returns true if the block is emitting indirect/weak redstone power on the specified side. If isBlockNormalCube
    132         * returns true, standard redstone propagation rules will apply instead and this will not be called. Args: World, X,
    133         * Y, Z, side
    134         */
    135        public boolean isProvidingWeakPower(IBlockAccess par1IBlockAccess, int par2, int par3, int par4, int par5)
    136        {
    137            if (!this.isRepeaterPowered)
    138            {
    139                return false;
    140            }
    141            else
    142            {
    143                int var6 = getDirection(par1IBlockAccess.getBlockMetadata(par2, par3, par4));
    144                return var6 == 0 && par5 == 3 ? true : (var6 == 1 && par5 == 4 ? true : (var6 == 2 && par5 == 2 ? true : var6 == 3 && par5 == 5));
    145            }
    146        }
    147
    148        /**
    149         * Lets the block know when one of its neighbor changes. Doesn't know which neighbor changed (coordinates passed are
    150         * their own) Args: x, y, z, neighbor blockID
    151         */
    152        public void onNeighborBlockChange(World par1World, int par2, int par3, int par4, int par5)
    153        {
    154            if (!this.canBlockStay(par1World, par2, par3, par4))
    155            {
    156                this.dropBlockAsItem(par1World, par2, par3, par4, par1World.getBlockMetadata(par2, par3, par4), 0);
    157                par1World.setBlockWithNotify(par2, par3, par4, 0);
    158                par1World.notifyBlocksOfNeighborChange(par2 + 1, par3, par4, this.blockID);
    159                par1World.notifyBlocksOfNeighborChange(par2 - 1, par3, par4, this.blockID);
    160                par1World.notifyBlocksOfNeighborChange(par2, par3, par4 + 1, this.blockID);
    161                par1World.notifyBlocksOfNeighborChange(par2, par3, par4 - 1, this.blockID);
    162                par1World.notifyBlocksOfNeighborChange(par2, par3 - 1, par4, this.blockID);
    163                par1World.notifyBlocksOfNeighborChange(par2, par3 + 1, par4, this.blockID);
    164            }
    165            else
    166            {
    167                int var6 = par1World.getBlockMetadata(par2, par3, par4);
    168                boolean var7 = this.func_82523_e(par1World, par2, par3, par4, var6);
    169
    170                if (!var7)
    171                {
    172                    boolean var8 = this.ignoreTick(par1World, par2, par3, par4, var6);
    173                    int var9 = (var6 & 12) >> 2;
    174
    175                    if (this.isRepeaterPowered && !var8 || !this.isRepeaterPowered && var8)
    176                    {
    177                        byte var10 = 0;
    178
    179                        if (this.func_83011_d(par1World, par2, par3, par4, var6))
    180                        {
    181                            var10 = -1;
    182                        }
    183
    184                        par1World.func_82740_a(par2, par3, par4, this.blockID, repeaterState[var9] * 2, var10);
    185                    }
    186                }
    187            }
    188        }
    189
    190        private boolean ignoreTick(World par1World, int par2, int par3, int par4, int par5)
    191        {
    192            int var6 = getDirection(par5);
    193
    194            switch (var6)
    195            {
    196                case 0:
    197                    return par1World.isBlockIndirectlyProvidingPowerTo(par2, par3, par4 + 1, 3) || par1World.getBlockId(par2, par3, par4 + 1) == Block.redstoneWire.blockID && par1World.getBlockMetadata(par2, par3, par4 + 1) > 0;
    198                case 1:
    199                    return par1World.isBlockIndirectlyProvidingPowerTo(par2 - 1, par3, par4, 4) || par1World.getBlockId(par2 - 1, par3, par4) == Block.redstoneWire.blockID && par1World.getBlockMetadata(par2 - 1, par3, par4) > 0;
    200                case 2:
    201                    return par1World.isBlockIndirectlyProvidingPowerTo(par2, par3, par4 - 1, 2) || par1World.getBlockId(par2, par3, par4 - 1) == Block.redstoneWire.blockID && par1World.getBlockMetadata(par2, par3, par4 - 1) > 0;
    202                case 3:
    203                    return par1World.isBlockIndirectlyProvidingPowerTo(par2 + 1, par3, par4, 5) || par1World.getBlockId(par2 + 1, par3, par4) == Block.redstoneWire.blockID && par1World.getBlockMetadata(par2 + 1, par3, par4) > 0;
    204                default:
    205                    return false;
    206            }
    207        }
    208
    209        public boolean func_82523_e(IBlockAccess par1IBlockAccess, int par2, int par3, int par4, int par5)
    210        {
    211            int var6 = getDirection(par5);
    212
    213            switch (var6)
    214            {
    215                case 0:
    216                case 2:
    217                    return par1IBlockAccess.isBlockProvidingPowerTo(par2 - 1, par3, par4, 4) && func_82524_c(par1IBlockAccess.getBlockId(par2 - 1, par3, par4)) || par1IBlockAccess.isBlockProvidingPowerTo(par2 + 1, par3, par4, 5) && func_82524_c(par1IBlockAccess.getBlockId(par2 + 1, par3, par4));
    218                case 1:
    219                case 3:
    220                    return par1IBlockAccess.isBlockProvidingPowerTo(par2, par3, par4 + 1, 3) && func_82524_c(par1IBlockAccess.getBlockId(par2, par3, par4 + 1)) || par1IBlockAccess.isBlockProvidingPowerTo(par2, par3, par4 - 1, 2) && func_82524_c(par1IBlockAccess.getBlockId(par2, par3, par4 - 1));
    221                default:
    222                    return false;
    223            }
    224        }
    225
    226        /**
    227         * Called upon block activation (right click on the block.)
    228         */
    229        public boolean onBlockActivated(World par1World, int par2, int par3, int par4, EntityPlayer par5EntityPlayer, int par6, float par7, float par8, float par9)
    230        {
    231            int var10 = par1World.getBlockMetadata(par2, par3, par4);
    232            int var11 = (var10 & 12) >> 2;
    233            var11 = var11 + 1 << 2 & 12;
    234            par1World.setBlockMetadataWithNotify(par2, par3, par4, var11 | var10 & 3);
    235            return true;
    236        }
    237
    238        /**
    239         * Can this block provide power. Only wire currently seems to have this change based on its state.
    240         */
    241        public boolean canProvidePower()
    242        {
    243            return true;
    244        }
    245
    246        /**
    247         * Called when the block is placed in the world.
    248         */
    249        public void onBlockPlacedBy(World par1World, int par2, int par3, int par4, EntityLiving par5EntityLiving)
    250        {
    251            int var6 = ((MathHelper.floor_double((double)(par5EntityLiving.rotationYaw * 4.0F / 360.0F) + 0.5D) & 3) + 2) % 4;
    252            par1World.setBlockMetadataWithNotify(par2, par3, par4, var6);
    253            boolean var7 = this.ignoreTick(par1World, par2, par3, par4, var6);
    254
    255            if (var7)
    256            {
    257                par1World.scheduleBlockUpdate(par2, par3, par4, this.blockID, 1);
    258            }
    259        }
    260
    261        /**
    262         * Called whenever the block is added into the world. Args: world, x, y, z
    263         */
    264        public void onBlockAdded(World par1World, int par2, int par3, int par4)
    265        {
    266            par1World.notifyBlocksOfNeighborChange(par2 + 1, par3, par4, this.blockID);
    267            par1World.notifyBlocksOfNeighborChange(par2 - 1, par3, par4, this.blockID);
    268            par1World.notifyBlocksOfNeighborChange(par2, par3, par4 + 1, this.blockID);
    269            par1World.notifyBlocksOfNeighborChange(par2, par3, par4 - 1, this.blockID);
    270            par1World.notifyBlocksOfNeighborChange(par2, par3 - 1, par4, this.blockID);
    271            par1World.notifyBlocksOfNeighborChange(par2, par3 + 1, par4, this.blockID);
    272        }
    273
    274        /**
    275         * Called right before the block is destroyed by a player.  Args: world, x, y, z, metaData
    276         */
    277        public void onBlockDestroyedByPlayer(World par1World, int par2, int par3, int par4, int par5)
    278        {
    279            if (this.isRepeaterPowered)
    280            {
    281                par1World.notifyBlocksOfNeighborChange(par2 + 1, par3, par4, this.blockID);
    282                par1World.notifyBlocksOfNeighborChange(par2 - 1, par3, par4, this.blockID);
    283                par1World.notifyBlocksOfNeighborChange(par2, par3, par4 + 1, this.blockID);
    284                par1World.notifyBlocksOfNeighborChange(par2, par3, par4 - 1, this.blockID);
    285                par1World.notifyBlocksOfNeighborChange(par2, par3 - 1, par4, this.blockID);
    286                par1World.notifyBlocksOfNeighborChange(par2, par3 + 1, par4, this.blockID);
    287            }
    288
    289            super.onBlockDestroyedByPlayer(par1World, par2, par3, par4, par5);
    290        }
    291
    292        /**
    293         * Is this block (a) opaque and (b) a full 1m cube?  This determines whether or not to render the shared face of two
    294         * adjacent blocks and also whether the player can attach torches, redstone wire, etc to this block.
    295         */
    296        public boolean isOpaqueCube()
    297        {
    298            return false;
    299        }
    300
    301        /**
    302         * Returns the ID of the items to drop on destruction.
    303         */
    304        public int idDropped(int par1, Random par2Random, int par3)
    305        {
    306            return Item.redstoneRepeater.shiftedIndex;
    307        }
    308
    309        @SideOnly(Side.CLIENT)
    310
    311        /**
    312         * A randomly called display update to be able to add particles or other items for display
    313         */
    314        public void randomDisplayTick(World par1World, int par2, int par3, int par4, Random par5Random)
    315        {
    316            if (this.isRepeaterPowered)
    317            {
    318                int var6 = par1World.getBlockMetadata(par2, par3, par4);
    319                int var7 = getDirection(var6);
    320                double var8 = (double)((float)par2 + 0.5F) + (double)(par5Random.nextFloat() - 0.5F) * 0.2D;
    321                double var10 = (double)((float)par3 + 0.4F) + (double)(par5Random.nextFloat() - 0.5F) * 0.2D;
    322                double var12 = (double)((float)par4 + 0.5F) + (double)(par5Random.nextFloat() - 0.5F) * 0.2D;
    323                double var14 = 0.0D;
    324                double var16 = 0.0D;
    325
    326                if (par5Random.nextInt(2) == 0)
    327                {
    328                    switch (var7)
    329                    {
    330                        case 0:
    331                            var16 = -0.3125D;
    332                            break;
    333                        case 1:
    334                            var14 = 0.3125D;
    335                            break;
    336                        case 2:
    337                            var16 = 0.3125D;
    338                            break;
    339                        case 3:
    340                            var14 = -0.3125D;
    341                    }
    342                }
    343                else
    344                {
    345                    int var18 = (var6 & 12) >> 2;
    346
    347                    switch (var7)
    348                    {
    349                        case 0:
    350                            var16 = repeaterTorchOffset[var18];
    351                            break;
    352                        case 1:
    353                            var14 = -repeaterTorchOffset[var18];
    354                            break;
    355                        case 2:
    356                            var16 = -repeaterTorchOffset[var18];
    357                            break;
    358                        case 3:
    359                            var14 = repeaterTorchOffset[var18];
    360                    }
    361                }
    362
    363                par1World.spawnParticle("reddust", var8 + var14, var10, var12 + var16, 0.0D, 0.0D, 0.0D);
    364            }
    365        }
    366
    367        @SideOnly(Side.CLIENT)
    368
    369        /**
    370         * only called by clickMiddleMouseButton , and passed to inventory.setCurrentItem (along with isCreative)
    371         */
    372        public int idPicked(World par1World, int par2, int par3, int par4)
    373        {
    374            return Item.redstoneRepeater.shiftedIndex;
    375        }
    376
    377        public static boolean func_82524_c(int par0)
    378        {
    379            return par0 == Block.redstoneRepeaterActive.blockID || par0 == Block.redstoneRepeaterIdle.blockID;
    380        }
    381
    382        public boolean func_83011_d(World par1World, int par2, int par3, int par4, int par5)
    383        {
    384            int var6 = getDirection(par5);
    385
    386            if (func_82524_c(par1World.getBlockId(par2 - Direction.offsetX[var6], par3, par4 - Direction.offsetZ[var6])))
    387            {
    388                int var7 = par1World.getBlockMetadata(par2 - Direction.offsetX[var6], par3, par4 - Direction.offsetZ[var6]);
    389                int var8 = getDirection(var7);
    390                return var8 != var6;
    391            }
    392            else
    393            {
    394                return false;
    395            }
    396        }
    397    }