| From: | Emre Hasegeli <emre(at)hasegeli(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | PostgreSQL Bugs <pgsql-bugs(at)postgresql(dot)org> |
| Subject: | Re: Line intersection point is wrong |
| Date: | 2016-06-19 19:19:54 |
| Message-ID: | CAE2gYzxrfOaje7D6vWJvs0FnmFE4MEEcfyb=O6EDzgzC64GzxA@mail.gmail.com |
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| Thread: | |
| Lists: | pgsql-bugs |
> Hmm, well, what if we change line_parallel() so that what it tests
> is whether (l1->A * l2->B - l2->A * l1->B) is zero? That seems
> simpler and more symmetric than what it does now.
I was thinking to do so. I would also check for both sides not to
overflow, but that can wait. Patch attached. Unfortunately,
the change causes too much noise on the regression tests.
| Attachment | Content-Type | Size |
|---|---|---|
| fix-line-v1.patch | text/x-diff | 303.2 KB |
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