Nyall Dawson 928afdd8c5 Fix geometry snapper sometimes creates unwanted overlapping segments
when snapping line layers

Because the default behavior of the snapper is to insert extra
vertices into the snapped geometry in order to make it 'follow'
the reference geometries exactly, this can result in unwanted
results for line layers where the resultant snapped layer
has overlapping line segments.

Since we can't always know what the desired result is that the
user wants (maybe they do want overlapping lines), instead
give them control over the result by exposing extra enum
options which never insert extra vertices.
2017-12-03 07:10:42 +10:00
..
2017-09-25 17:12:03 +10:00