private void step(IWorldEditor editor, Random rand, ITheme theme, Cardinal dir, Coord origin) {
if (editor.getBlock(origin).isOpaqueCube()) return;
Coord start;
Coord end;
IStair stair = theme.getPrimaryStair();
IBlockFactory blocks = theme.getPrimaryWall();
Cardinal[] orth = Cardinal.orthogonal(dir);
start = new Coord(origin);
end = new Coord(origin);
start.add(orth[0]);
end.add(orth[1]);
end = new Coord(end.getX(), 60, end.getZ());
RectSolid.fill(editor, rand, start, end, blocks, true, true);
start = new Coord(origin);
end = new Coord(origin);
start.add(orth[0]);
end.add(orth[1]);
stair.setOrientation(dir, false);
RectSolid.fill(editor, rand, start, end, stair, true, true);
origin.add(Cardinal.DOWN);
origin.add(dir);
step(editor, rand, theme, dir, origin);
}
