private void generateStructures(WorldGenerator generator, World world, Random random, int chunkX, int chunkZ, int chance, Block topBlock, Class<?>... classes) {
        HighQualityRandom highQualityRandom = new HighQualityRandom();
        ArrayList<Class<?>> classesList = new ArrayList<Class<?>>(Arrays.asList(classes));
        int struc_x = (chunkX * 16) + highQualityRandom.nextInt(15);
        int struc_z = (chunkZ * 16) + highQualityRandom.nextInt(15);
        float y = 0;
        for (int x = 0; x < struc_x; x++)
        {
            for (int z = 0; z < struc_z; z++)
            {
                int oldY = Math.round(y);
                y += calculateGenerationHeight(world, x, z, topBlock);
                y /= 2;
                if (Math.round(y) != oldY){ return; }
            }
        }
        int struc_y = (int)y;
        BlockPos pos = new BlockPos(struc_x, struc_y, struc_z);
        Class<?> biome = world.provider.getBiomeForCoords(pos).getClass();
        if (world.getWorldType() != WorldType.FLAT) {
            if (classesList.contains(biome) || classesList.isEmpty()) {
                if (highQualityRandom.nextInt(chance) == 0)
                {

                    generator.generate(world, highQualityRandom, pos);
                }
            }
        }
    }