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My block doesn't mark a sub chunk to render.


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I have two blocks that don't seem to mark sub chunks as containing anything, so when there aren't any other blocks in the sub chunk it doesn't render.

 

My block classes:

BlockCatwalk

package com.thecodewarrior.catwalks;


import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;

import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.client.renderer.texture.IIconRegister;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.item.EntityItem;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.util.IIcon;
import net.minecraft.util.MovingObjectPosition;
import net.minecraft.util.MovingObjectPosition.MovingObjectType;
import net.minecraft.util.Vec3;
import net.minecraft.world.Explosion;
import net.minecraft.world.IBlockAccess;
import net.minecraft.world.World;
import net.minecraftforge.client.event.DrawBlockHighlightEvent;
import net.minecraftforge.common.ForgeHooks;
import net.minecraftforge.common.util.ForgeDirection;
import net.minecraftforge.event.ForgeEventFactory;
import buildcraft.api.tools.IToolWrench;
import codechicken.lib.raytracer.ExtendedMOP;
import codechicken.lib.raytracer.IndexedCuboid6;
import codechicken.lib.raytracer.RayTracer;
import codechicken.lib.vec.BlockCoord;
import codechicken.lib.vec.Cuboid6;
import codechicken.lib.vec.Vector3;
import cpw.mods.fml.common.FMLCommonHandler;
import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

public class BlockCatwalk extends Block implements ICagedLadderConnectable {
public boolean lights;
public boolean bottom;

private RayTracer rayTracer = new RayTracer();


public IIcon transparent;

public IIcon sideTexture;
public IIcon bottomTexture;

public IIcon bottomTextureWithLights;
public IIcon sideTextureWithLights;

public IIcon bottomLights;
public IIcon sideLights;

public BlockCatwalk(boolean lights, boolean bottom) {
	super(Material.iron);
	setHardness(1.0F);
	setStepSound(Block.soundTypeMetal);
	setBlockName("catwalk");
	if(lights && !bottom)
		setCreativeTab(CreativeTabs.tabTransport);
//		setHarvestLevel("wrench", 0);
//		setHarvestLevel("pickaxe", 0);
	this.lights = lights;
	this.bottom = bottom;
}

//==============================================================================
// Clicking methods
//==============================================================================

public float getPlayerRelativeBlockHardness(EntityPlayer player, World world, int x, int y, int z){
	int metadata = world.getBlockMetadata(x, y, z);
	float hardness = blockHardness;

	if(player.getHeldItem() != null ) {
		boolean shouldBeSoft = false;
		if(player.getHeldItem().getItem() instanceof IToolWrench)
			shouldBeSoft = true;
		Set<String> toolClasses = player.getHeldItem().getItem().getToolClasses(player.getHeldItem());
		if(toolClasses.contains("wrench"))
			shouldBeSoft = true;

		if(shouldBeSoft)
			hardness = blockHardness/10;
	}

        return player.getBreakSpeed(this, false, metadata, x, y, z) / hardness / 30F;
}

@Override
public void onBlockClicked(World world, int x, int y, int z, EntityPlayer player) {
	MovingObjectPosition hit = RayTracer.retraceBlock(world, player, x, y, z);

	ForgeDirection side = ForgeDirection.UP;
	if (hit != null) {
		side = (ForgeDirection) ( (ExtendedMOP) hit ).data;
	}

	if(player.getCurrentEquippedItem() != null && player.getCurrentEquippedItem().getItem() instanceof IToolWrench) {
		if(player.isSneaking()) {

			this.dropBlockAsItem(world, x, y, z, 0, 0);
			world.setBlockToAir(x,y,z);
			this.updateNeighborSides(world, x, y, z, false);
		}
	}
}


@Override
public boolean onBlockActivated(World world, int x, int y, int z, EntityPlayer player, int blockSide, float hitX, float hitY, float hitZ) {
	MovingObjectPosition hit = RayTracer.retraceBlock(world, player, x, y, z);

	ForgeDirection side = ForgeDirection.UP;
	if (hit != null) {
		side = (ForgeDirection) ( (ExtendedMOP) hit ).data;
	}

	if(player.getCurrentEquippedItem() != null && player.getCurrentEquippedItem().getItem() instanceof IToolWrench) {
		if(player.isSneaking()) {
			if(this.lights) {
				if(!world.isRemote) {
					world.spawnEntityInWorld(new EntityItem(world, x+0.5, y+0.5, z+0.5, new ItemStack(CatwalkMod.itemRopeLight, 1)));
					updateData(world, x, y, z, ForgeDirection.UP, false, false);
				}
			}
		} else {
			if(side != ForgeDirection.UP) {
				updateData(world,x,y,z, side, !getOpenState(world,x,y,z, side), this.lights);
			}
		}
	}

	if(player.getCurrentEquippedItem() != null && player.getCurrentEquippedItem().getItem() instanceof ItemRopeLight && this.lights == false) {
		updateData(world, x, y, z, ForgeDirection.UP, false, true);
		if(!player.capabilities.isCreativeMode)
			player.getCurrentEquippedItem().stackSize--;
	}
//		
//		if()

	return false;
}

//==============================================================================
// Place/Destroy methods
//==============================================================================

    @Override
public void onBlockPlacedBy(World w, int x, int y, int z, EntityLivingBase e, ItemStack s) {
	updateNeighborSides(w,x,y,z,true);
}

public void onBlockDestroyedByPlayer(World w, int x, int y, int z, int meta) {
	updateNeighborSides(w,x,y,z,false);
}

public void onBlockDestroyedByExplosion(World w, int x, int y, int z, Explosion e) {
	updateNeighborSides(w,x,y,z,false);
}

//==============================================================================
// Drop methods
//==============================================================================

public ArrayList<ItemStack> getDrops(World world, int x, int y, int z, int metadata, int fortune)
{
    ArrayList<ItemStack> ret = new ArrayList<ItemStack>();

    ret.add(new ItemStack(
    		Item.getItemFromBlock(CatwalkMod.catwalkUnlitBottom),
    		1));
    if(this.lights) {
    	ret.add(new ItemStack(
    			CatwalkMod.itemRopeLight,
    			1
    		));
    }
    return ret;
}

public boolean canHarvestBlock(EntityPlayer player, int meta)
    {
        return true;
    }

//==============================================================================
// Block highlight raytrace methods
//==============================================================================

@Override
    public MovingObjectPosition collisionRayTrace(World world, int x, int y, int z, Vec3 start, Vec3 end) {
        List<IndexedCuboid6> cuboids = new LinkedList<IndexedCuboid6>();
        
        float px = 1/16F;
    	int meta = world.getBlockMetadata(x, y, z);
//    	System.out.println("META: " + (meta & );
    	boolean ovr = false;
    	double d = 0;
    	float smallHeight = 0.25f;
    	if(bottom) {
    		d = 0.125;
    		//cuboids.add(new IndexedCuboid6(Hitboxes.BOTTOM, new Cuboid6(x+ px, y+ 0, z+ px, x+ 1-px, y+ px, z+ 1-px)));
    	} else {
    		d = 0.25;
    	}
    	cuboids.add(new IndexedCuboid6(ForgeDirection.DOWN, new Cuboid6(x+ d, y+ 0, z+ d, x+ 1-d, y+ px, z+ 1-d)));
    	float ym = 1;
    	
    	if((meta &  == 0 || ovr) { ym = 1; } else { ym = smallHeight; }
    	cuboids.add(new IndexedCuboid6(ForgeDirection.NORTH, new Cuboid6(
			x+ 0, 	y+ 0, 	z+ 0,
			x+ 1, 	y+ ym, 	z+ px
		)));
    	
    	
    	if((meta & 4) == 0 || ovr) { ym = 1; } else { ym = smallHeight; }
    	cuboids.add(new IndexedCuboid6(ForgeDirection.SOUTH, new Cuboid6(
			x+ 0, 	y+ 0, 	z+ 1-px,
			x+ 1, 	y+ ym, 	z+ 1
		)));
    	
    	
    	if((meta & 2) == 0 || ovr) { ym = 1; } else { ym = smallHeight; }
    	cuboids.add(new IndexedCuboid6(ForgeDirection.WEST, new Cuboid6(
			x+ 0, 	y+ 0, 	z+ 0,
			x+ px, 	y+ ym, 	z+ 1
		)));
    	
    	
    	if((meta & 1) == 0 || ovr) { ym = 1; } else { ym = smallHeight; }
    	cuboids.add(new IndexedCuboid6(ForgeDirection.EAST, new Cuboid6(
			x+ 1-px, y+ 0, 	z+ 0,
			x+ 1, 	 y+ ym, 	z+ 1
		)));
    	//new BlockCoord(x, y, z), this
        ExtendedMOP mop = (ExtendedMOP) rayTracer.rayTraceCuboids(new Vector3(start), new Vector3(end), cuboids, new BlockCoord(x, y, z), this);
        if(mop != null) {
        	if(mop.sideHit == ((ForgeDirection)mop.data).getOpposite().ordinal()) {
        		mop.sideHit = ((ForgeDirection)mop.data).ordinal();
        	
        	}
        }
        //        System.out.println(mop.data);
        return mop;
    }
    
    @SideOnly(Side.CLIENT)
    @SubscribeEvent
    public void onBlockHighlight(DrawBlockHighlightEvent event) {
        if (event.target.typeOfHit == MovingObjectType.BLOCK && event.player.worldObj.getBlock(event.target.blockX, event.target.blockY, event.target.blockZ) == this)
            RayTracer.retraceBlock(event.player.worldObj, event.player, event.target.blockX, event.target.blockY, event.target.blockZ);
    }
    
    //==============================================================================
// Collision methods
//==============================================================================

@Override
public void onEntityCollidedWithBlock(World world, int x, int y, int z, Entity entity) {
	if (FMLCommonHandler.instance().getEffectiveSide() != Side.CLIENT)
		return;
	double mul = 1.315;
	if(entity instanceof EntityPlayer && ( (EntityPlayer)entity).isSneaking() ) {
		mul = 2.860578;
	}
	CatwalkMod.proxy.speedupPlayer(world, entity, mul);
}

@Override
    public void addCollisionBoxesToList(World world, int x, int y, int z, AxisAlignedBB blockBounds, List list, Entity collidingEntity) {
    	
	if(collidingEntity == null)
		return;

	float px = 1/16F;
    	int meta = world.getBlockMetadata(x, y, z);
    	float top = 1.5F;
    	if(collidingEntity.isSneaking())
    		top = 1.0F;
    	
    	boolean ovr = false;
    	Cuboid6 oldBounds = new Cuboid6(
    			this.getBlockBoundsMinX(), this.getBlockBoundsMinY(), this.getBlockBoundsMinZ(),
    			this.getBlockBoundsMaxX(), this.getBlockBoundsMaxY(), this.getBlockBoundsMaxZ()
    		);
    	if(bottom) {
    		this.setBlockBounds(0, 0, 0, 1, px, 1);
            super.addCollisionBoxesToList(world, x, y, z, blockBounds, list, collidingEntity);
    	}
    	if((meta &  == 0 || ovr) {
    		if(getStepConnect(world,x,y,z,ForgeDirection.NORTH)) {
    			this.setBlockBounds(0, 0, 0, 1, 1, px);
    		} else {
    			this.setBlockBounds(0, 0, 0, 1, top, px);
    		}
            super.addCollisionBoxesToList(world, x, y, z, blockBounds, list, collidingEntity);
    	}
    	if((meta & 4) == 0 || ovr) {
    		if(getStepConnect(world,x,y,z,ForgeDirection.SOUTH)) {
    			this.setBlockBounds(0, 0, 1-px, 1, 1, 1);
    		} else {
    			this.setBlockBounds(0, 0, 1-px, 1, top, 1);
    		}
            super.addCollisionBoxesToList(world, x, y, z, blockBounds, list, collidingEntity);
    	}
    	if((meta & 2) == 0 || ovr) {
    		if(getStepConnect(world,x,y,z,ForgeDirection.WEST)) {
    			this.setBlockBounds(0, 0, 0, px, 1, 1);
    		} else {
    			this.setBlockBounds(0, 0, 0, px, top, 1);
    		}
            super.addCollisionBoxesToList(world, x, y, z, blockBounds, list, collidingEntity);
    	}
    	if((meta & 1) == 0 || ovr) {
    		if(getStepConnect(world,x,y,z,ForgeDirection.EAST)) {
    			this.setBlockBounds(1-px, 0, 0, 1, 1, 1);
    		} else {
    			this.setBlockBounds(1-px, 0, 0, 1, top, 1);    			
    		}
            super.addCollisionBoxesToList(world, x, y, z, blockBounds, list, collidingEntity);
    	}
    	
    	oldBounds.setBlockBounds(this);
//    	this.setBlockBounds(0, 0, 0, 1, 1, 1);
    }

public boolean getBlocksMovement(IBlockAccess p_149655_1_, int p_149655_2_, int p_149655_3_, int p_149655_4_)
{
    return false;
}

//==============================================================================
// Texture methods
//==============================================================================

@Override
public void registerBlockIcons(IIconRegister reg) {
	transparent   			= reg.registerIcon("catwalks:transparent");

	sideTexture   			= reg.registerIcon("catwalks:side");
	bottomTexture 			= reg.registerIcon("catwalks:bottom");

    sideTextureWithLights   = reg.registerIcon("catwalks:side_with_lights");
    bottomTextureWithLights = reg.registerIcon("catwalks:bottom_with_lights");
    
    sideLights   			= reg.registerIcon("catwalks:side_lights");
    bottomLights 			= reg.registerIcon("catwalks:bottom_lights");
}

@Override
public IIcon getIcon(int _side, int meta) {
	ForgeDirection dir = ForgeDirection.VALID_DIRECTIONS[_side];
	/**/
    if(dir == ForgeDirection.DOWN) {
		if(bottom) {
			return lights ? bottomTextureWithLights : bottomTexture;
		}
    }
    if(dir == ForgeDirection.NORTH && (meta &  < 1) {
    	return lights ? sideTextureWithLights : sideTexture;
    }
    if(dir == ForgeDirection.SOUTH && (meta & 4) < 1) {
    	return lights ? sideTextureWithLights : sideTexture;
    }
    if(dir == ForgeDirection.WEST && (meta & 2) < 1) {
    	return lights ? sideTextureWithLights : sideTexture;
    }
    if(dir == ForgeDirection.EAST && (meta & 1) < 1) {
    	return lights ? sideTextureWithLights : sideTexture;
    }
    return transparent; /**/
}

@Override
public boolean isSideSolid(IBlockAccess w, int x, int y, int z, ForgeDirection side) {
	return !getOpenState(w,x,y,z,side);//getOpenState(w, x-side.offsetX, y-side.offsetY, z-side.offsetZ, side.getOpposite());
}

@SideOnly(Side.CLIENT)
public boolean shouldSideBeRendered(IBlockAccess w, int x, int y, int z, int _side)
{
	ForgeDirection dir = ForgeDirection.getOrientation(_side);
    int meta = w.getBlockMetadata(x-dir.offsetX, y-dir.offsetY, z-dir.offsetZ);

    if(dir == ForgeDirection.DOWN && (
    		bottom == false ||
    		( w.isSideSolid(x, y, z, ForgeDirection.UP, false) && !(w.getBlock(x,y,z) instanceof BlockCatwalk) )
    	)) {
    	return false;
    }
    if(dir == ForgeDirection.NORTH && (
    		(meta &  > 0 ||
    		( w.isSideSolid(x, y, z, ForgeDirection.SOUTH, false) && !(w.getBlock(x,y,z) instanceof BlockCatwalk) )
    	)) {
    	return false;
    }
    if(dir == ForgeDirection.SOUTH && (
    		(meta & 4) > 0 ||
    		( w.isSideSolid(x, y, z, ForgeDirection.NORTH, false) )// && !(w.getBlock(x,y,z) instanceof BlockCatwalk) )
    	)) {
    	return false;
    }
    if(dir == ForgeDirection.WEST && (
    		(meta & 2) > 0 ||
    		( w.isSideSolid(x, y, z, ForgeDirection.EAST, false) && !(w.getBlock(x,y,z) instanceof BlockCatwalk) )
    	)) {
    	return false;
    }
    if(dir == ForgeDirection.EAST && (
    		(meta & 1) > 0 ||
    		( w.isSideSolid(x, y, z, ForgeDirection.WEST, false) )// && !(w.getBlock(x,y,z) instanceof BlockCatwalk) )
    	)) {
    	return false;
    }
    return true;
}



/**
 * Gets the light value of the specified block coords. Args: x, y, z
 */
public int getLightValue()
{
    return this.lights ? 15 : 0;
}

public int getRenderType(){
    return CatwalkMod.catwalkRenderType;
}

@SideOnly(Side.CLIENT)
public int getRenderBlockPass()
{
    return 0;
}

public boolean isOpaqueCube()
{
    return false;
}
}

(I removed all the code for accessing data etc. here's the full class http://pastebin.com/HcXbYvVV)

 

BlockCagedLadder:

package com.thecodewarrior.catwalks;

import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;

import buildcraft.api.tools.IToolWrench;
import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.client.renderer.texture.IIconRegister;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.item.EntityItem;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.ItemStack;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.util.IIcon;
import net.minecraft.util.MovingObjectPosition;
import net.minecraft.util.MovingObjectPosition.MovingObjectType;
import net.minecraft.util.Vec3;
import net.minecraft.world.Explosion;
import net.minecraft.world.IBlockAccess;
import net.minecraft.world.World;
import net.minecraftforge.client.event.DrawBlockHighlightEvent;
import net.minecraftforge.common.util.ForgeDirection;
import codechicken.lib.raytracer.ExtendedMOP;
import codechicken.lib.raytracer.IndexedCuboid6;
import codechicken.lib.raytracer.RayTracer;
import codechicken.lib.vec.BlockCoord;
import codechicken.lib.vec.Cuboid6;
import codechicken.lib.vec.Vector3;
import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

public class BlockCagedLadder extends Block implements ICustomLadderVelocity, ICagedLadderConnectable {

RayTracer rayTracer = new RayTracer();

public ForgeDirection direction;
public boolean lights;

public IIcon bottom;
public IIcon bottom_with_lights;
public IIcon bottom_lights;

public IIcon ladder;
public IIcon ladder_with_lights;
public IIcon ladder_lights;

public IIcon front;
public IIcon front_with_lights;
public IIcon front_lights;

public IIcon side;
public IIcon side_with_lights;
public IIcon side_lights;

public IIcon landing;
public IIcon landing_side;

public IIcon transparent;

public Map<RelativeSide, Cuboid6> closed = new HashMap<RelativeSide, Cuboid6>();
public Map<RelativeSide, Cuboid6>   open = new HashMap<RelativeSide, Cuboid6>();

// meta: bottom, front, left, right

public BlockCagedLadder(ForgeDirection direction, boolean lights) {
	super(Material.iron);
	setHardness(1.0F);
	setStepSound(Block.soundTypeMetal);
	float px = 1/16F;
    	setBlockBounds(px, 0, px, 1-px, 1, 1-px);
	setBlockName("cagedladder");
	setStepSound(soundTypeLadder);
	if(direction == ForgeDirection.NORTH && !lights)
		setCreativeTab(CreativeTabs.tabTransport);
	setHarvestLevel("wrench", 0);
	setHarvestLevel("pickaxe", 0);
	this.lights = lights;
	this.direction = direction;
	initHitBoxes();
}

//==============================================================================
// Place/Destroy methods
//==============================================================================

    @Override
public void onBlockPlacedBy(World w, int x, int y, int z, EntityLivingBase e, ItemStack s) {
	updateNeighborSides(w,x,y,z,true);
}

public void onBlockDestroyedByPlayer(World w, int x, int y, int z, int meta) {
	updateNeighborSides(w,x,y,z,false);
}

public void onBlockDestroyedByExplosion(World w, int x, int y, int z, Explosion e) {
	updateNeighborSides(w,x,y,z,false);
}

public void updateNeighborSides(World world, int x, int y, int z, boolean self) {
	Block b = world.getBlock(x, y+1, z);
	if(b instanceof BlockCagedLadder) {
//			this.updateOpenData(world, x, y+1, z, RelativeSide.BOTTOM, false);
//			System.out.println("---");
		( (BlockCagedLadder)b ).updateBottom(world, x, y+1, z);
//			System.out.println("---");
	}
	if(self)
		this.updateBottom(world, x, y, z);
}

public void updateBottom(World world, int x, int y, int z) {
//		System.out.println("UPD");
	if(world.getBlock(x, y-1, z) instanceof BlockCagedLadder) {
		updateOpenData(world, x, y, z, RelativeSide.BOTTOM, true);
	} else {
		updateOpenData(world, x, y, z, RelativeSide.BOTTOM, false);
	}
}

//==============================================================================
// Clicking methods
//==============================================================================

public float getPlayerRelativeBlockHardness(EntityPlayer player, World world, int x, int y, int z){
	int metadata = world.getBlockMetadata(x, y, z);
	float hardness = blockHardness;

	if(player.getHeldItem() != null ) {
		boolean shouldBeSoft = false;
		if(player.getHeldItem().getItem() instanceof IToolWrench)
			shouldBeSoft = true;
		Set<String> toolClasses = player.getHeldItem().getItem().getToolClasses(player.getHeldItem());
		if(toolClasses.contains("wrench"))
			shouldBeSoft = true;

		if(shouldBeSoft)
			hardness = blockHardness/10;
	}

        return player.getBreakSpeed(this, false, metadata, x, y, z) / hardness / 30F;
}

@Override
public void onBlockClicked(World world, int x, int y, int z, EntityPlayer player) {
	MovingObjectPosition hit = RayTracer.retraceBlock(world, player, x, y, z);

	RelativeSide side = RelativeSide.TOP;
	if (hit != null) {
		side = (RelativeSide) ( (ExtendedMOP) hit ).data;
	}

//		if(player.getCurrentEquippedItem() != null && player.getCurrentEquippedItem().getItem() instanceof IToolWrench) {
//			if(player.isSneaking()) {
//
//				this.dropBlockAsItem(world, x, y, z, 0, 0);
//				world.setBlockToAir(x,y,z);
//				this.updateNeighborSides(world, x, y, z, false);
//			}
//		}
}

@Override
public boolean onBlockActivated(World world, int x, int y, int z, EntityPlayer player, int blockSide, float hitX, float hitY, float hitZ) {
	MovingObjectPosition hit = RayTracer.retraceBlock(world, player, x, y, z);

	RelativeSide side = RelativeSide.TOP;
	if (hit != null) {
		side = (RelativeSide) ( (ExtendedMOP) hit ).data;
	}
//		System.out.println(side);

	ItemStack handStack = player.getCurrentEquippedItem();
	if(handStack != null && handStack.getItem() instanceof IToolWrench) {
		if(player.isSneaking()) {
			if(this.lights) {
				if(!world.isRemote) {
					world.spawnEntityInWorld(new EntityItem(world, x+0.5, y+0.5, z+0.5, new ItemStack(CatwalkMod.itemRopeLight, 1)));
					updateIdData(world, x, y, z, direction, false);
				}
			}
		} else {
//				System.out.println("META:  " + world.getBlockMetadata(x,y,z));
			updateOpenData(world, x, y, z, side, !isOpen(side, world.getBlockMetadata(x, y, z)));
//				System.out.println("META2: " + world.getBlockMetadata(x,y,z));
		}
	}

	if(player.getCurrentEquippedItem() != null && player.getCurrentEquippedItem().getItem() instanceof ItemRopeLight && this.lights == false) {
		updateIdData(world, x, y, z, direction, true);
		if(!player.capabilities.isCreativeMode)
			player.getCurrentEquippedItem().stackSize--;
	}

	return false;
}

//==============================================================================
// ILadderCustomVelocity methods
//==============================================================================

@Override
    public boolean isOnLadder(IBlockAccess world, int x, int y, int z, EntityLivingBase entity)
    {
	float px = 1/16F;
	float px2 = 2*px;
	float d = px*3;
        return CatwalkMod.options.fullBlockLadder || entity.boundingBox.intersectsWith(AxisAlignedBB.getBoundingBox(x+d, y, z+d, x+1-d, y+1, z+1-d));
    }

public double getLadderVelocity(IBlockAccess world, int x, int y, int z, EntityLivingBase entity) {
	return entity.isSneaking() ? 0.15D : 0.25D;
}

public double getLadderFallVelocity(IBlockAccess world, int x, int y, int z, EntityLivingBase entity) {
	return 0.25D;
}


//==============================================================================
// Block highlight raytrace methods
//==============================================================================

@Override
    public MovingObjectPosition collisionRayTrace(World world, int x, int y, int z, Vec3 start, Vec3 end) {
        List<IndexedCuboid6> cuboids = new LinkedList<IndexedCuboid6>();
        
    	float ym = 1;
    	
    	float px = 1/16F;
	float px2 = 2*px;

	float outsideDistance = 1/32F;
	float insideDistance  = 3/32F;

	float out = px/2;
	float in = out+px;
    	
	int meta = world.getBlockMetadata(x, y, z);

	if(!(world.getBlock(x, y+1, z) instanceof BlockCagedLadder)) {
		addToList(x, y, z, cuboids, RelativeSide.TOP, open.get(RelativeSide.TOP));
	}

    	for (RelativeSide rs : RelativeSide.values()) {
		if(rs == RelativeSide.LADDER) {
			addToList(x, y, z, cuboids, rs, closed.get(rs));
			continue;
		}
		if(rs == RelativeSide.TOP) {
			continue;
		}
		if(isOpen(rs, meta)) {
			addToList(x, y, z, cuboids, rs, open.get(rs));
		} else {
			addToList(x, y, z, cuboids, rs, closed.get(rs));
		}
	}
    	
        ExtendedMOP mop = (ExtendedMOP) rayTracer.rayTraceCuboids(new Vector3(start), new Vector3(end), cuboids, new BlockCoord(x, y, z), this);
        if(mop != null) {
        	if(mop.sideHit == RelativeSide.RStoFD( (RelativeSide)mop.data, direction).getOpposite().ordinal()) {
        		mop.sideHit = ForgeDirection.getOrientation(mop.sideHit).getOpposite().ordinal();
        	}
        }
        //        System.out.println(mop.data);
        return mop;
    }
    
public void addToList(int x, int y, int z, List<IndexedCuboid6> list, Object data, Cuboid6 cuboid) {

	list.add( new IndexedCuboid6(data, new Cuboid6(
			x+cuboid.min.x, y+cuboid.min.y, z+cuboid.min.z,
			x+cuboid.max.x, y+cuboid.max.y, z+cuboid.max.z
			)) );
}

    @SideOnly(Side.CLIENT)
    @SubscribeEvent
    public void onBlockHighlight(DrawBlockHighlightEvent event) {
        if (event.target.typeOfHit == MovingObjectType.BLOCK && event.player.worldObj.getBlock(event.target.blockX, event.target.blockY, event.target.blockZ) == this)
            RayTracer.retraceBlock(event.player.worldObj, event.player, event.target.blockX, event.target.blockY, event.target.blockZ);
    }

//==============================================================================
// Texture methods
//==============================================================================

@Override
public void registerBlockIcons(IIconRegister reg) {
    transparent   		= reg.registerIcon("catwalks:transparent");
    
    bottom 				= reg.registerIcon("catwalks:ladder/bottom");
    bottom_with_lights	= reg.registerIcon("catwalks:ladder/bottom_with_lights");
    bottom_lights		= reg.registerIcon("catwalks:ladder/bottom_lights");
    
    ladder 				= reg.registerIcon("catwalks:ladder/ladder");
	ladder_with_lights 	= reg.registerIcon("catwalks:ladder/ladder_with_lights");
	ladder_lights 		= reg.registerIcon("catwalks:ladder/ladder_lights");

	front 				= reg.registerIcon("catwalks:ladder/front");
	front_with_lights 	= reg.registerIcon("catwalks:ladder/front_with_lights");
	front_lights 		= reg.registerIcon("catwalks:ladder/front_lights");

	side 				= reg.registerIcon("catwalks:ladder/side");
	side_with_lights 	= reg.registerIcon("catwalks:ladder/side_with_lights");
	side_lights 		= reg.registerIcon("catwalks:ladder/side_lights");

	landing 			= reg.registerIcon("catwalks:ladder/landing");
	landing_side		= reg.registerIcon("catwalks:ladder/landing_side");
}

@Override
public IIcon getIcon(int _side, int meta) {
	RelativeSide dir = RelativeSide.FDtoRS( ForgeDirection.getOrientation(_side), direction );

	switch(dir) {
	case LADDER:
		if(lights)
			return ladder_with_lights;
		else
			return ladder;
	case FRONT:
		if(lights)
			return front_with_lights;
		else
			return front;
	case LEFT:
	case RIGHT:
		if(lights)
			return side_with_lights;
		else
			return side;
	case BOTTOM:
		if(lights)
			return bottom_with_lights;
		else
			return bottom;
	}

    return transparent;
}

public IIcon getLightIcon(int _side, int meta) {
	RelativeSide dir = RelativeSide.FDtoRS( ForgeDirection.getOrientation(_side) , direction);

	switch(dir) {
	case LADDER:
		return ladder_lights;
	case FRONT:
		return front_lights;
	case LEFT:
	case RIGHT:
		return side_lights;
	case BOTTOM:
		return transparent;//bottom_lights;
	}

    return transparent;
}

@Override
public boolean isSideSolid(IBlockAccess w, int x, int y, int z, ForgeDirection side) {
	if(side == ForgeDirection.UP)
		return false;
	return !isOpen(RelativeSide.FDtoRS(side, direction), w.getBlockMetadata(x,y,z));
}

@SideOnly(Side.CLIENT)
public boolean shouldSideBeRendered(IBlockAccess w, int x, int y, int z, int _side)
{
	ForgeDirection dir = ForgeDirection.getOrientation(_side);
	if(dir == ForgeDirection.DOWN) {
		if(w.isSideSolid(x, y, z, ForgeDirection.DOWN, false))
			return false;
	}
    int meta = w.getBlockMetadata(x-dir.offsetX, y-dir.offsetY, z-dir.offsetZ);

    if(isOpen(RelativeSide.FDtoRS(dir, direction), meta)) {
    	return false;
    }
    
    return true;
}


//==============================================================================
// Collision methods
//==============================================================================

@Override
    public void addCollisionBoxesToList(World world, int x, int y, int z, AxisAlignedBB blockBounds, List list, Entity collidingEntity) {
    	if(collidingEntity == null)
		return;

	float px = 1/16F;

	float out = px;///2;
	float in = out+px;
    	
	int meta = world.getBlockMetadata(x, y, z);
    	
    	if(!isOpen(RelativeSide.FDtoRS(ForgeDirection.NORTH, direction), meta)) {
    		addToList(world, x, y, z, blockBounds, list, out, 0, out, 1-out, 1, in);
    	}
    	
    	if(!isOpen(RelativeSide.FDtoRS(ForgeDirection.SOUTH, direction), meta)) {
    		addToList(world, x, y, z, blockBounds, list, out, 0, 1-out, 1-out, 1, 1-in);
    	}
    	
    	if(!isOpen(RelativeSide.FDtoRS(ForgeDirection.EAST, direction), meta)) {
    		addToList(world, x, y, z, blockBounds, list, 1-in, 0, out, 1-out, 1, 1-out);
    	}
    	
    	if(!isOpen(RelativeSide.FDtoRS(ForgeDirection.WEST, direction), meta)) {
    		addToList(world, x, y, z, blockBounds, list, out, 0, out, in, 1, 1-out);
    	}
    }

public void addToList(World world, int x, int y, int z, AxisAlignedBB blockBounds, List list, double minX, double minY, double minZ, double maxX, double maxY, double maxZ) {
	AxisAlignedBB axisalignedbb1 = AxisAlignedBB.getBoundingBox(
        		(double)x + minX, (double)y + minY, (double)z + minZ,
        		(double)x + maxX, (double)y + maxY, (double)z + maxZ
        		);
        		
	if (axisalignedbb1 != null && blockBounds.intersectsWith(axisalignedbb1))
        {
            list.add(axisalignedbb1);
        }
}

@Override
public void onEntityCollidedWithBlock(World world, int x, int y, int z, Entity entity) {

//		System.out.println("COLLIDE!");
}

//==============================================================================
// Render type methods
//==============================================================================

public int getRenderType(){
    return CatwalkMod.ladderRenderType;
}

@SideOnly(Side.CLIENT)
public int getRenderBlockPass()
{
    return 0;
}

public boolean isOpaqueCube()
{
    return false;
}

@SideOnly(Side.CLIENT)
public boolean isBlockNormalCube()
{
    return super.isBlockNormalCube();
}

public boolean isNormalCube()
{
    return false;
}

public static enum RelativeSide {
	LADDER, FRONT, LEFT, RIGHT, TOP, BOTTOM;
}
}

(I removed all the code for accessing data etc. here's the full class http://pastebin.com/8z2dUkAj)

 

The code for the BlockCagedLadder ISBRH is quite complex (~400 lines), so unless you want it I'll just leave it out.

package com.thecodewarrior.catwalks;

import net.minecraft.block.Block;
import net.minecraft.client.renderer.RenderBlocks;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.world.IBlockAccess;
import net.minecraftforge.common.util.ForgeDirection;

import org.lwjgl.opengl.GL11;

import cpw.mods.fml.client.registry.ISimpleBlockRenderingHandler;

public class CatwalkRenderer implements ISimpleBlockRenderingHandler {

@Override
public void renderInventoryBlock(Block block, int meta, int modelId,
		RenderBlocks renderer) {
	boolean lights = false;
	boolean bottom = true;
	if(block instanceof BlockCatwalk) {
		lights = ( (BlockCatwalk)block).lights;
		bottom = ( (BlockCatwalk)block).bottom;
	}

	renderer.overrideBlockBounds(0, 0, 0, 1, 1, 1);
	 Tessellator tessellator = Tessellator.instance;
    GL11.glTranslatef(-0.5F, -0.5F, -0.5F);
    tessellator.startDrawingQuads();
    
    renderer.renderFromInside = true;
    renderer.renderFaceYNeg(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 0, meta));
    renderer.renderFaceYPos(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 1, meta));
    renderer.renderFaceZNeg(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 2, meta));
    renderer.renderFaceZPos(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 3, meta));
    renderer.renderFaceXNeg(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 4, meta));
    renderer.renderFaceXPos(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 5, meta));
    
    renderer.renderFromInside = false;
    renderer.renderFaceYNeg(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 0, meta));
    renderer.renderFaceYPos(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 1, meta));
    renderer.renderFaceZNeg(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 2, meta));
    renderer.renderFaceZPos(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 3, meta));
    renderer.renderFaceXNeg(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 4, meta));
    renderer.renderFaceXPos(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 5, meta));
    
    tessellator.draw();
    GL11.glTranslatef(0.5F, 0.5F, 0.5F);
    
    renderer.unlockBlockBounds();
}

@Override
public boolean renderWorldBlock(IBlockAccess world, int x, int y, int z,
		Block block, int modelId, RenderBlocks renderer) {

	boolean lights = false;
	boolean bottom = true;
	if(block instanceof BlockCatwalk) {
		lights = ( (BlockCatwalk)block).lights;
		bottom = ( (BlockCatwalk)block).bottom;
	}

//		renderer.renderFromInside = true;
//		renderer.renderStandardBlock(block, x, y, z);
//		RenderBlocks renderer = new RenderBlocks(world);
//		renderer.setRenderFromInside(true);
//		renderer.setRenderBounds(0.0D, 0.0D, 0.0D, 1.0D, 1.0D, 1.0D);
	renderer.overrideBlockBounds(0, 0, 0, 1, 1, 1);
	renderer.renderFromInside = true;
	renderer.renderStandardBlock(block, x, y, z);
	renderer.renderFromInside = false;
	renderer.renderStandardBlock(block, x, y, z);
	boolean force = false;
	if(lights) {
		BlockCatwalk b = ((BlockCatwalk) block);

		boolean oldAO = renderer.enableAO;
		renderer.enableAO = false;

		Tessellator.instance.setBrightness(15728880);

		renderer.renderFromInside = true;

		if( b.shouldSideBeRendered(world, x, y-1, z, 0) || force)
			renderer.renderFaceYNeg(b, x, y, z, b.bottomLights);
		if( b.shouldSideBeRendered(world, x, y, z-1, 2) || force)
			renderer.renderFaceZNeg(b, x, y, z, b.sideLights);
		if( b.shouldSideBeRendered(world, x, y, z+1, 3) || force)
			renderer.renderFaceZPos(b, x, y, z, b.sideLights);
		if( b.shouldSideBeRendered(world, x-1, y, z, 4) || force )
			renderer.renderFaceXNeg(b, x, y, z, b.sideLights);
		if( b.shouldSideBeRendered(world, x+1, y, z, 5) || force )
			renderer.renderFaceXPos(b, x, y, z, b.sideLights);

		renderer.renderFromInside = false;

		if( b.shouldSideBeRendered(world, x, y-1, z, 0) || force)
			renderer.renderFaceYNeg(b, x, y, z, b.bottomLights);
		if( b.shouldSideBeRendered(world, x, y, z-1, 2) || force)
			renderer.renderFaceZNeg(b, x, y, z, b.sideLights);
		if( b.shouldSideBeRendered(world, x, y, z+1, 3) || force)
			renderer.renderFaceZPos(b, x, y, z, b.sideLights);
		if( b.shouldSideBeRendered(world, x-1, y, z, 4) || force )
			renderer.renderFaceXNeg(b, x, y, z, b.sideLights);
		if( b.shouldSideBeRendered(world, x+1, y, z, 5) || force )
			renderer.renderFaceXPos(b, x, y, z, b.sideLights);

		renderer.enableAO = oldAO;
	}
	renderer.unlockBlockBounds();
	renderer.clearOverrideBlockTexture();
	return false;
}

@Override
public boolean shouldRender3DInInventory(int modelId) {
	return true;
}

@Override
public int getRenderId() {
	return CatwalkMod.catwalkRenderType;
}

}

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