Desire Path code

package roadblock.block;

import java.util.List;

import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.client.renderer.texture.IIconRegister;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.item.ItemStack;
import net.minecraft.potion.Potion;
import net.minecraft.potion.PotionEffect;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.util.IIcon;
import net.minecraft.world.ColorizerGrass;
import net.minecraft.world.IBlockAccess;
import net.minecraft.world.World;
import roadblock.utils.Config;
import roadblock.utils.Register;
import cpw.mods.fml.common.registry.GameRegistry;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

public class Grassroad extends Block {

    private int speed;
    private final String name = "Grassroad";
    @SideOnly(Side.CLIENT)
    private IIcon top;
    @SideOnly(Side.CLIENT)
    private IIcon top_overlay;
    @SideOnly(Side.CLIENT)
    private IIcon field_149993_M;
    @SideOnly(Side.CLIENT)
    public IIcon side_overlay;

    public Grassroad() {
        super(Material.grass);

        GameRegistry.registerBlock(this, name).setStepSound(
                Block.soundTypeGrass);
        setBlockName(name);
        setCreativeTab(Register.tabRoadBlock);
        setLightOpacity(255);
        useNeighborBrightness = true;
        setHardness(1.5F);
    }

    private boolean isFullRoad(IBlockAccess type, int x, int y, int z) {
        Block block = type.getBlock(x, y, z);
        // add blocks here that wont make a road a full block
        return block == Blocks.fence_gate || block == Blocks.air
                || block == Blocks.torch;
    }

    @Override
    public int damageDropped(int meta) {
        return meta;
    }

    public void setBlockBoundsBasedOnState(IBlockAccess block, int x, int y,
            int z) {
        int meta = block.getBlockMetadata(x, y, z);
        boolean airabove = this.isFullRoad(block, x, y + 1, z);
        float f4;

        if (!airabove) {
            f4 = 1.0F;
        } else {
            if (meta == 0) {
                f4 = 0.9375F;
            } else {
                f4 = 0.4375F;
            }
        }
        this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, f4, 1.0F);
    }

    @SuppressWarnings({ "rawtypes" })
    public void addCollisionBoxesToList(World world, int x, int y, int z,
            AxisAlignedBB axisAlignedBB, List list, Entity entity) {
        setBlockBoundsBasedOnState(world, x, y, z);
        super.addCollisionBoxesToList(world, x, y, z, axisAlignedBB, list,
                entity);
    }

    @Override
    public boolean onBlockActivated(World world, int xCoord, int yCoord,
            int zCoord, EntityPlayer player, int p_149727_6, float p_149727_7,
            float p_149727_8, float p_149727_9) {
        Block block1 = world.getBlock(xCoord, yCoord, zCoord);

        if (!world.isRemote) {
            ItemStack stack = player.getHeldItem();
            if (stack != null && stack.getItem() == Register.ironMallet
                    || stack.getItem() == Register.goldMallet
                    || stack.getItem() == Register.diamondMallet) {
                int meta = world.getBlockMetadata(xCoord, yCoord, zCoord);

                switch (meta) {

                case 0:
                    // System.out.println("Metadata Value: " + meta);
                    world.setBlockMetadataWithNotify(xCoord, yCoord, zCoord, 1,
                            2);
                    world.markBlockForUpdate(xCoord, yCoord, zCoord);
                    world.playSoundEffect((double) ((float) xCoord + 0.5F),
                            (double) ((float) yCoord + 0.5F),
                            (double) ((float) zCoord + 0.5F),
                            block1.stepSound.getStepResourcePath(),
                            (block1.stepSound.getVolume() + 1.0F) / 2.0F,
                            block1.stepSound.getPitch() * 0.8F);
                    stack.damageItem(1, player);
                    break;
                case 1:
                    // System.out.println("Metadata Value: " + meta);
                    world.setBlockMetadataWithNotify(xCoord, yCoord, zCoord, 0,
                            2);
                    world.markBlockForUpdate(xCoord, yCoord, zCoord);
                    world.playSoundEffect((double) ((float) xCoord + 0.5F),
                            (double) ((float) yCoord + 0.5F),
                            (double) ((float) zCoord + 0.5F),
                            block1.stepSound.getStepResourcePath(),
                            (block1.stepSound.getVolume() + 1.0F) / 2.0F,
                            block1.stepSound.getPitch() * 0.8F);
                    stack.damageItem(1, player);
                    break;
                case 2:
                    // System.out.println("Metadata Value: " + meta);
                    break;

                }
            }
        }

        return true;
    }

    public boolean isOpaqueCube() {
        return false;
    }

    public boolean renderAsNormalBlock() {
        return false;
    }

    public void onEntityCollidedWithBlock(World world, int xCoord, int yCoord,
            int zCoord, Entity entity) {
        if (Config.speedOn) {
            if (entity instanceof EntityLivingBase) {
                if (Config.speed > 9) {
                    speed = 9;
                } else {
                    speed = Config.speed;
                }
                ((EntityLivingBase) entity).addPotionEffect(new PotionEffect(
                        Potion.moveSpeed.id, 0, speed));
            }
        }
    }

    @SideOnly(Side.CLIENT)
    public void setBlockBoundsForItemRender() {
        setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 0.9375F, 1.0F);
    }

    @SideOnly(Side.CLIENT)
    public IIcon getIcon(int side, int meta) {
        return side == 1 ? this.top : (side == 0 ? Blocks.dirt
                .getBlockTextureFromSide(side) : this.blockIcon);
    }

    @SideOnly(Side.CLIENT)
    public IIcon getIcon(IBlockAccess world, int xCoord, int yCoord,
            int zCoord, int par5) {
        if (par5 == 1) {
            return this.top;
        } else if (par5 == 0) {
            return Blocks.dirt.getBlockTextureFromSide(par5);

        }
        return blockIcon;
    }

    @SideOnly(Side.CLIENT)
    public void registerBlockIcons(IIconRegister regIcon) {
        this.blockIcon = regIcon.registerIcon("grass_side");
        this.top = regIcon.registerIcon("roadblock:grassroad_top");
        this.top_overlay = regIcon.registerIcon("roadblock:grassroad_top_overlay");
        this.side_overlay = regIcon.registerIcon("grass_side_overlay");
    }

    @SideOnly(Side.CLIENT)
    public int getBlockColor() {
        double d0 = 0.5D;
        double d1 = 1.0D;
        return ColorizerGrass.getGrassColor(d0, d1);
    }

    /**
     * Returns the color this block should be rendered. Used by leaves.
     */
    @SideOnly(Side.CLIENT)
    public int getRenderColor(int p_149741_1_) {
        return this.getBlockColor();
    }

    /**
     * Returns a integer with hex for 0xrrggbb with this color multiplied
     * against the blocks color. Note only called when first determining what to
     * render.
     */
    @SideOnly(Side.CLIENT)
    public int colorMultiplier(IBlockAccess world, int xCoord, int yCoord,
            int zCoord) {
        int l = 0;
        int i1 = 0;
        int j1 = 0;

        for (int k1 = -1; k1 <= 1; ++k1) {
            for (int l1 = -1; l1 <= 1; ++l1) {
                int i2 = world.getBiomeGenForCoords(xCoord + l1, zCoord + k1)
                        .getBiomeGrassColor(xCoord + l1, yCoord, zCoord + k1);
                l += (i2 & 16711680) >> 16;
                i1 += (i2 & 65280) >> 8;
                j1 += i2 & 255;
            }
        }

        return (l / 9 & 255) << 16 | (i1 / 9 & 255) << 8 | j1 / 9 & 255;
    }

    @SideOnly(Side.CLIENT)
    public IIcon getIconSideOverlay() {
        return this.side_overlay;
    }

    @SideOnly(Side.CLIENT)
    public IIcon getIconTopOverlay() {
        return this.top_overlay;
    }

}