function generateStructureInBiomes(ids, params, random) {
    const biome_id = World.getBiome(params.x, params.z);
    if(ids.indexOf(biome_id) == -1) return;

    const chance = random.nextFloat();
    if (chance < params.chance.normal || chance < params.chance.biomed) {
        if (World.getBlockID(params.x, params.y, params.z) == params.check
            && World.getBlockID(params.x, params.y + 1, params.z) == 0)
            params.str.build(params.x, params.y + 1, params.z, Structure.ROTATE_Y, random, params.region);
    }
}