I fixed the problem with the use of the following construct
\csname pgfutil@ifundefined\endcsname{pgf@sh@ns@intersection-1}{no marking necessary since there is no intersection points}{do the marking of the intersection points}
thanks for a posting on https://tex.stackexchange.com .
Kent
Graphics, Figures & Tables ⇒ intersection
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- Stefan Kottwitz
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intersection
Hi Kent,
thank you for the information! I tested with the standard LaTeX \@ifundefined but did not finish.
Stefan
thank you for the information! I tested with the standard LaTeX \@ifundefined but did not finish.
Stefan
LaTeX.org admin
intersection
A final comment from my side:
A more straightforward way of doing this may be just to
put \def\t{0} before PGF determines the intersections between the paths (if any).
Then \ifthenelse{\t=0}{}{mark the \t intersection points} will do the trick.
Kent
A more straightforward way of doing this may be just to
put \def\t{0} before PGF determines the intersections between the paths (if any).
Then \ifthenelse{\t=0}{}{mark the \t intersection points} will do the trick.
Kent
intersection
Another related issue, see the example 96.5.4, page 981 in the PGF 3.0 manual illustrating the use of \pgfpointintersectionoflines.
How can I use this to get access the actual intersection point?
\coordinate (X) at (\pgfpointintersectionoflines); does not work.
Kent
How can I use this to get access the actual intersection point?
\coordinate (X) at (\pgfpointintersectionoflines); does not work.
Kent