v.hull: should not be region sensitive

[neteler]

If the current region is not set to the vector map, v.hull fails with:

v.hull training_turkey_087VI174 out=training_turkey_087VI174_hull
ERROR: Convex hull calculation requires at least three points. Exiting.

The reason is in main.c, line 311:

    /* load site coordinates */
    G_get_window(&window);
    numSitePoints = loadSiteCoordinates(&Map, &points, all->answer, &window);

...

In loadSiteCoordinates()

    /* copy window to box */
    Vect_region_box(window, &box);

I wonder why it is made region sensitive (untypical for GRASS vector commands)...

[mmetz]

Replying to neteler:

If the current region is not set to the vector map, v.hull fails

In this case, you need to use the -a flag to ignore the current region.

I have changed the behaviour in trunk such that the current region is only respected if the (new) -r flag is set (see also other v.in.* modules). The -a flag has been removed.

Additionally, I have added selection options 'cats' and 'where'.

All changes are in r53759.

Markus M