creating cross-sections

[andrea-bistacchi]

Methods to create cross-sections must me corrected and made more logical.

Functions and classes to be reviewed are:

XSectionCollection

sections_from_file

section_from_azimuth

gocad2vtk_section (this one in gocad2vtk module)

Probably adding in XSectionCollection a method (or some methods) to update metadata and geometry from redundant values when others are known will help avoiding a lot of code repetition.

[andrea-bistacchi]

Also section_from_azimuthmust be reviewed because the end point here must be calculated from azimuth and length/width.

[andrea-bistacchi]

Also to check:

• lengthvs widthvs height terminology, also for inclined sections

• strange behavior of get_XY_from_W, get_deltaXY_from_deltaW, plane2world.