WorldGenerationTools.java

package mcjty.rftools.dimension.world;

import net.minecraft.block.Block;
import net.minecraft.init.Blocks;
import net.minecraft.world.World;

public class WorldGenerationTools {

    public static int findSuitableEmptySpot(World world, int x, int z) {
        int y = world.getTopSolidOrLiquidBlock(x, z);
        if (y == -1) {
            return -1;
        }

        y--;            // y should now be at a solid or liquid block.

        if (y > world.getHeight() - 5) {
            y = world.getHeight() / 2;
        }


        Block block = world.getBlock(x, y+1, z);
        while (block.getMaterial().isLiquid()) {
            y++;
            if (y > world.getHeight()-10) {
                return -1;
            }
            block = world.getBlock(x, y+1, z);
        }

        return y;
    }

    // Return true if this block is solid.
    public static boolean isSolid(World world, int x, int y, int z) {
        if (world.isAirBlock(x, y, z)) {
            return false;
        }
        Block block = world.getBlock(x, y, z);
        return block.getMaterial().blocksMovement();
    }

    // Return true if this block is solid.
    public static boolean isAir(World world, int x, int y, int z) {
        if (world.isAirBlock(x, y, z)) {
            return true;
        }
        Block block = world.getBlock(x, y, z);
        return block == null;
    }

    // Starting at the current height, go down and fill all air blocks with stone until a
    // non-air block is encountered.
    public static void fillEmptyWithStone(World world, int x, int y, int z) {
        while (y > 0 && !isSolid(world, x, y, z)) {
            world.setBlock(x, y, z, Blocks.stone, 0, 2);
            y--;
        }
    }
}