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Re: Clipping IDLgrPolyLine objects? [message #13975 is a reply to message #13844]

Fri, 18 December 1998 00:00

Mark Hadfield
Messages: 783
Registered: May 1995

Senior Member

dEdmundson@Bigfoot.com wrote in message <75agu3$74b$1@nnrp1.dejanews.com>...
> ...Is there
> a simple method of clipping polylines?

Draw something in front of it!

I have found the simplest way of controlling clipping/overlap in Object
Graphics is to use vertical separation. The smallest vertical separation
recognised by IDL for this purpose is equal to the distance between the
view's front and rear clipping planes divided by 2^16.

Eg see the Mask method in

http://katipo.niwa.cri.nz/~hadfield/gust/software/idl/mghgrg raph__define.pro

--
Mark Hadfield, m.hadfield@niwa.cri.nz http://www.niwa.cri.nz/~hadfield/
National Institute for Water and Atmospheric Research
PO Box 14-901, Wellington, New Zealand

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[Message index]

		Clipping IDLgrPolyLine objects? By: dEdmundson on Thu, 17 December 1998 00:00
		Re: Clipping IDLgrPolyLine objects? By: Struan Gray on Fri, 18 December 1998 00:00
		Re: Clipping IDLgrPolyLine objects? By: Mark Hadfield on Fri, 18 December 1998 00:00

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