Help - my cave is inside-out

[Wookey]

+++ Martin Budaj [05-01-03 12:59 +0100]:

>> Warning: scrap outline intersects itself in bmb3_s3 at fake
>>
>> and it is than random if MetaPost determines the interior of scrap
>> correctly. The solution is to
>> 2) correct the position of the control points (see the second picture)


I have a bit of a problem with your example fix. Now the wall does not
follow the wall on my survey - I have had to distort it a little to solve
this problem. This seems to me to be the wrong answer - the original version
is a correct drawing of the cave, therion needs to be able to join (and
distort if necessary) that drawing without telling me it it 'wrong' and I
have to draw the cave a slightly different shape in order for it to be
accepted.

I realise this may not be easy, but I don't really think that telling the
user their correct drawing causes an error is good enough. Perhaps when the
outline intersection happens on a line that is a scrap end line (i.e one that
therion invented, not one the user drew) then that should not be an error -
and therion could adjust its own line to compensate? Is that practical?


Wookey
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