Chisel/src/main/java/team/chisel/block/BlockCarvablePowered.java

package team.chisel.block;

import net.minecraft.block.material.Material;
import net.minecraft.world.IBlockAccess;

public class BlockCarvablePowered extends BlockCarvable {

    public BlockCarvablePowered(Material m) {
        super(m);
    }

    /**
     * Can this block provide power. Only wire currently seems to have this change based on its state.
     */
    @Override
    public boolean canProvidePower() {
        return true;
    }

    /**
     * Returns true if the block is emitting indirect/weak redstone power on the specified side. If isBlockNormalCube
     * returns true, standard redstone propagation rules will apply instead and this will not be called. Args: World, X,
     * Y, Z, side. Note that the side is reversed - eg it is 1 (up) when checking the bottom of the block.
     */
    @Override
    public int isProvidingWeakPower(IBlockAccess par1IBlockAccess, int par2, int par3, int par4, int par5) {
        return 15;
    }

}