[Rd] plotting text with very small negative rotation hangs (PR#9301)

[bolker at zoo.ufl.edu]

This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
--------------enig308510A16A445880F353C5C9
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable


to trigger the bug:

plot(0:1,0:1)
text(0.5,0.5,"abc",srt=3D-1e-9)

this doesn't happen for positive, small srt,
or for negative srt with magnitude greater
than about 1e-8 (the example in plot.phylo
in the ape package triggers it, with a
srt value of -3e-15).

plot(0:1,0:1)
for (i in 1:10) {
  cat(i,"\n")
  text(0.5,0.5,"hello",srt=3D(-10^-i))
}

  I have traced this a fair ways into
the C code -- I think it happens somewhere
in clipText -- but I'm not sure.  Sorry not
to be able to provide a fix at the moment.

  This is on Ubuntu 6.06, not sure whether
it affects other platforms or not ...

  Ben Bolker

> version
               _
platform       i686-pc-linux-gnu
arch           i686
os             linux-gnu
system         i686, linux-gnu
status
major          2
minor          4.0
year           2006
month          10
day            03
svn rev        39566
language       R
version.string R version 2.4.0 (2006-10-03)


--------------enig308510A16A445880F353C5C9
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.2.2 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFFNV75c5UpGjwzenMRAhu9AKCVHQ3khVCj1skWyn8wCHl2w0nkbQCfdct5
zehYhcbw2bazsjuTvX9eAIk=
=CL1h
-----END PGP SIGNATURE-----

--------------enig308510A16A445880F353C5C9--