Removes a sphere of points from a point distribution.
rmsphere / inner_radius/ outer_radius/ xcen,ycen,zcen/
inner_radius and outer_radius are the distances from sphere center point.
xcen,ycen,zcen is the sphere center point.
rmsphere / 0. .1 / 0. 0. 0.
rmpoint/compress
resetpts/itp
Remove nodes and elements defined by the sphere at zero coordinates and within a distance of .1. First the nodes are marked for removal, rmpoint/compress removes the marked nodes. The command resetpts/itp updates the itp boundary array.