Intersection calc cleanup.

* Fixes some bugs in compute_intersection
* Adds an intersection check that doesn't need to compute the exact pt
* Make some of the variable names consistent
* General floating point tweaks

Bug: skia:
Change-Id: Ib2fb8bee39b5d9c635d62e606fe826b7efe64dfa
Reviewed-on: https://skia-review.googlesource.com/145532
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
1 file changed