[therion] Re: another set of inside-out pillars

[Martin Budaj]

Wookey wrote:

>> Hmm. I just checked. I found one in goon_s1 that the wrong way round, but
>> every pillar in goon_s2 (which is the one coming out wrong in the final
>> plot)
>> is correct (tick on the inside).


The line orientation in inner pillars is significant only for displaying
of asymetrical walls (blocks, sand, ice), not for determining the inside
of the passage.

You have actually two crossing scrap borders in one scrap  :-)  MetaPost
didn't notice it, which is really bad. This can't be improved at the level
of MetaPost macros, because we use low-level built-in function to
determine the line orientation.

The enclosed picture shows the problematic connections.

M.