sphere_grid_bounds (
        grid_data,
        center,
        radius,
        )

zero_volume_inside_atom ( atom )

zero_array_boundary ( array,  step=1 )

zero_volume_inside_selection_box ()

zero_data_in_sphere (
        grid_data,
        center,
        radius,
        )

redraw_data_region ( dr )

full_matrices ( data )

zero_volume_inside_selected_atom ()

volume_sphere ( atom,  dr )

zero_data_outside_sphere (
        grid_data,
        center,
        radius,
        )

zero_volume_outside_atom ( atom )

norm ( v )

active_data_region ()

plane_spacings ( grid_data )

Spacings in xyz space of jk, ik, and ij planes.

zero_volume_boundary ( step=1 )

The step parameter allows zeroing more than one plane at some of the 6 faces of the volume so that subsampling using every planes will still have zeros on the boundary.

zero_volume_inside_box (
        data,
        ijk_min,
        ijk_max,
        )

make_writable_volume_copy ( dr=None )

If active volume data region is not writable (ie. not an using the Array_Grid_Data class) then make a writable copy.

volume_viewer_dialog ()

ChimeraExtension.py

gui.py