Spawn inside a structure??

Hi community out there,

I'm creating a new dimension in order to get my new mod done.

I wanna spawn the player inside a structure and so I pluged in the spawn coordinates called from the World.class:

public static void generateInterRealm(World world, Random random, int chunkX, int chunkZ) {

int chunkX1 = (world.getSpawnPoint().posX);

  int chunkZ1 = (world.getSpawnPoint().posZ);

    (new WorldGenInterRealmRoom()).generate(world, random, chunkX1, 50, chunkZ1);

  }

}

Can someone please help me to get this working???

Thanks beforehand

Alasar