luigi scarso wrote:
On Wed, Nov 25, 2009 at 5:45 AM, Curiouslearn <curiousle...@gmail.com> wrote:
The code below shows a cyclic path that I am interested in creating
(it is in red if you run the code). The example works fine as long as
I have, u:=1cm, as in the code below. But if I replace it by ,
u:=0.6cm, there is no output. There is an error saying that paths 4
and 3 do not intersect. Is this a bug?
More a 'known limitation': intersection point calculations are not
perfect because of the fixed precision calculus.
Lint[4] is the culprit. With u=0.6cm it has these coordinates:
(170.07976,0.00014). Notice how the y coordinate is not actually
on the xaxis? That is because the actual intersection between
stLine and xaxis does not fit nicely into a scaled pair, so
metapost takes the 'closest approximation', which in this case
is slightly off both lines.
The solution is to add an explicit fix to Lint[4] just after its
current assignment:
Lint[4]:=(xpart Lint[4], 0);
This is not pretty, and one of the problems we hope to solve
with metapost 2.0.
Best wishes,
Taco
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