Nyall Dawson 3341a3e91e Unify behavior of various geometry API leftOf tests
Now instead of mixing bools/numeric returns, we always use
ints, where:
-1 = left
0 = test failed, e.g. point on line
1 = right

Also fix a bunch of extra issues identified with left of tests
as a result of these changes
2017-11-29 10:04:20 +10:00
..