if (oldSelector instanceof ConvexPolyhedralRegionSelector) {
final ConvexPolyhedralRegionSelector convexPolyhedralRegionSelector = (ConvexPolyhedralRegionSelector) oldSelector;
pos1 = convexPolyhedralRegionSelector.pos1;
region = new ConvexPolyhedralRegion(convexPolyhedralRegionSelector.region);
} else {
final Region oldRegion;
try {
oldRegion = oldSelector.getRegion();
} catch (IncompleteRegionException e) {
region = new ConvexPolyhedralRegion(oldSelector.getIncompleteRegion().getWorld());
return;
}
final int minY = oldRegion.getMinimumPoint().getBlockY();
final int maxY = oldRegion.getMaximumPoint().getBlockY();
region = new ConvexPolyhedralRegion(oldRegion.getWorld());
for (final BlockVector2D pt : new ArrayList<BlockVector2D>(oldRegion.polygonize(Integer.MAX_VALUE))) {
region.addVertex(pt.toVector(minY));
region.addVertex(pt.toVector(maxY));
}