Minecraft block detector

package net.minecraft.src;

import java.util.Random;

public class BlockDetector extends Block
{
    private World welt;
    public BlockDetector(int i, int j) {
        super(i, j, Material.rock);
        setBlockName("DetectorBlock");
        setRequiresSelfNotify();
    }

    public void onBlockAdded(World world, int i, int j, int k)
    {
        if(!world.multiplayerWorld)
        {
            updateDetectorState(world, i, j, k);
        }
        welt = world;
    }

    public void onBlockPlacedBy(World world, int i, int j, int k, EntityLiving entityliving)
    {
        int l = determineOrientation(world, i, j, k, (EntityPlayer)entityliving);
        world.setBlockMetadataWithNotify(i, j, k, l);
        if(!world.multiplayerWorld)
        {
            updateDetectorState(world, i, j, k);
        }
    }


    public boolean isPoweringTo(IBlockAccess iblockaccess, int i, int j, int k, int l)
    {
        boolean powered = (iblockaccess.getBlockMetadata(i, j, k) & 8) != 0;
        System.out.println("pow: " + powered);
        return powered;
    }

    public int getBlockTextureFromSide(int i, int j)
    {
        return i != 1 ? i != 0 ? i != 3 ? blockIndexInTexture : blockIndexInTexture + 1 : blockIndexInTexture + 17 : blockIndexInTexture + 17;
    }


    public int getBlockTexture(IBlockAccess iblockaccess, int i, int j, int k, int l)
    {
        if(l == 1)
        {
            return blockIndexInTexture + 17;
        }
        if(l == 0)
        {
            return blockIndexInTexture + 17;
        } else
        {
            int i1 = iblockaccess.getBlockMetadata(i, j, k);
            if (i1 >= 8) {
                i1 = i1 - 8;
            }
            return l == i1 ? blockIndexInTexture + 1 : blockIndexInTexture;
        }
    }


    public void updateDetectorState(World world, int i, int j, int k) {
        boolean powered = false;
        int meta = world.getBlockMetadata(i, j, k);
        int rotation = getOrientation(meta);

        if (0 != world.getBlockId(i, j, k-1) && rotation == 2) {
            powered = true;
        }
        else if (0 != world.getBlockId(i, j, k+1) && rotation == 3) {
            powered = true;
        }
        else if (0 != world.getBlockId(i-1, j, k) && rotation == 4) {
            powered = true;
        }
        else if (0 != world.getBlockId(i+1, j, k) && rotation == 5) {
            powered = true;
        }
        else if (powered == true){
            powered = false;
        }

        if (powered) {
            world.setBlockMetadata(i, j, k, rotation | 8);
        } else {
            world.setBlockMetadata(i, j, k, rotation);
        }

        int nmeta = world.getBlockMetadata(i, j, k);
        if (nmeta != meta) {
            world.notifyBlocksOfNeighborChange(i, j, k, blockID);
            world.notifyBlocksOfNeighborChange(i+1, j, k, blockID);
            world.notifyBlocksOfNeighborChange(i, j, k+1, blockID);
            world.notifyBlocksOfNeighborChange(i, j, k-1, blockID);
            world.notifyBlocksOfNeighborChange(i-1, j, k, blockID);
            world.notifyBlocksOfNeighborChange(i, j - 1, k, blockID);
            world.markBlocksDirty(i, j, k, i, j, k);
            System.out.println("meta: " + meta + " nmeta: " + nmeta + " pow: " + powered);
        }
    }

    public void onNeighborBlockChange(World world, int i, int j, int k, int l)
    {
        if(!world.multiplayerWorld)
        {
            updateDetectorState(world, i, j, k);
        }
    }

    /*private void setDetectorDefaultDirection(World world, int i, int j, int k)
    {
        if(!world.multiplayerWorld)
        {
            int l = world.getBlockId(i, j, k - 1);
            int i1 = world.getBlockId(i, j, k + 1);
            int j1 = world.getBlockId(i - 1, j, k);
            int k1 = world.getBlockId(i + 1, j, k);
            byte byte0 = 3;
            if(Block.opaqueCubeLookup[l] && !Block.opaqueCubeLookup[i1])
            {
                byte0 = 3;
            }
            if(Block.opaqueCubeLookup[i1] && !Block.opaqueCubeLookup[l])
            {
                byte0 = 2;
            }
            if(Block.opaqueCubeLookup[j1] && !Block.opaqueCubeLookup[k1])
            {
                byte0 = 5;
            }
            if(Block.opaqueCubeLookup[k1] && !Block.opaqueCubeLookup[j1])
            {
                byte0 = 4;
            }
            this.rotation = byte0;
            world.setBlockMetadataWithNotify(i, j, k, byte0);
        }
    }*/

    public void updateTick(World world, int i, int j, int k, Random random) {
        updateDetectorState(world, i, j, k);
    }

    private static int determineOrientation(World world, int i, int j, int k, EntityPlayer entityplayer)
    {
        if(MathHelper.abs((float)entityplayer.posX - (float)i) < 2.0F && MathHelper.abs((float)entityplayer.posZ - (float)k) < 2.0F)
        {
            double d = (entityplayer.posY + 1.8200000000000001D) - (double)entityplayer.yOffset;
            if(d - (double)j > 2D)
            {
                return 1;
            }
            if((double)j - d > 0.0D)
            {
                return 0;
            }
        }
        int l = MathHelper.floor_double((double)((entityplayer.rotationYaw * 4F) / 360F) + 0.5D) & 3;
        if(l == 0)
        {
            return 2;
        }
        if(l == 1)
        {
            return 5;
        }
        if(l == 2)
        {
            return 3;
        }
        return l != 3 ? 0 : 4;
    }

    public int tickRate()
    {
        return 20;
    }

    public boolean isIndirectlyPoweringTo(World world, int i, int j, int k, int l)
    {
        boolean powered = (world.getBlockMetadata(i, j, k) & 8) != 0;
        //System.out.println("pow ind: " + powered);
        if((world.getBlockMetadata(i, j, k) & 8) == 0)
        {
            return false;
        } else
        {
            return l == 1;
        }
    }

    public boolean canProvidePower()
    {
        return true;
    }

    public static int getOrientation(int i)
    {
        return i & 7;
    }

    public int idDropped(int i, Random random, int j)
    {
        return 209;
    }

    public int quantityDropped(Random random)
    {
        return 1;
    }
}