box_transform_and_xform ( data_region )

normalize_vector ( v )

box_corners ( box )

length ( v )

eye_to_box_transform ( box_transform,  xform )

Eye to box coordinate transform.

sign ( x )

bounding_box ( points )

pixel_size ( view_distance )

box_center ( box )

translate_box ( box,  offset )

near_clip_plane_distance ()

transform_box_corners ( box,  transform )

box_to_eye_transform ( box_transform,  xform )

Combine transform of ijk_box to object coordinates and model xform mapping object coordinates to eye coordinates

Box_Model

Select_Volume_Subregion