erja@daimi.dk (Erik Jacobsen) (10/10/89)
How can I test if there is no currentpoint, or the current path
is empty? I would like something like this:
thereisacurrentpoint { pathbbox ..... }
{ ..... } ifelse
Erik
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Erik Jacobsen, Computer Science Department, Aarhus University
Ny Munkegade, Building 540, DK-8000 Aarhus C, Denmark
Phone: +45 86127188, Telefax: +45 86135725, Home phone: +45 86169199
Internet: erja@daimi.dk, Ham-radio: OZ6KSerja@epimetheus.dk (Erik Jacobsen) (10/10/89)
In article <3439@daimi.dk> I write: > >How can I test if there is no currentpoint, or the current path >is empty? I would like something like this: > > > thereisacurrentpoint { pathbbox ..... } > { ..... } ifelse The answer: To test if pathbbox executes with an error, you can do this: {pathbbox} stopped { ActionIfError } { ActionIfOk } ifelse Thanks to jlk@daimi.dk Erik -------------------------------------------------------------------- Erik Jacobsen, Computer Science Department, Aarhus University Ny Munkegade, Building 540, DK-8000 Aarhus C, Denmark Phone: +45 86127188, Telefax: +45 86135725, Home phone: +45 86169199 Internet: erja@daimi.dk, Ham-radio: OZ6KS
cet1@cl.cam.ac.uk (C.E. Thompson) (10/11/89)
In article <3439@daimi.dk>, erja@daimi.dk (Erik Jacobsen) writes: > How can I test if there is no currentpoint, or the current path > is empty? I would like something like this: > > thereisacurrentpoint { pathbbox ..... } > { ..... } ifelse Nice question! The best I can come up with is /thereisacurrentpoint { mark false {cleartomark mark true} dup dup dup pathforall exch pop } def (Using the marks is just a way of being able to use the same procedure for all four arguments to 'pathforall'.) Chris Thompson JANET: cet1@uk.ac.cam.phx Internet: cet1%phx.cam.ac.uk@nsfnet-relay.ac.uk