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Article #432

Using User Paths in a graphing program

#432
From: William J. Murphy
Date: Tue, 04 Aug 1992 06:19
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I am aware that user paths may provide an increase in speed of drawing in 
a program that for instance plots data points.  What I don't know is where 
to find a good reference for how to set them up and use them sensibly.
For now, my plotView would have to cycle through the data every time the view
parameters were changed.  That seems wasteful.  Particularly, when one draws
thousands of symbols, the delay can be tremendously long, try it in nxyplot
some time.  I have considered creating a font for the symbol part and already
have a font example I did for another program.  Would that decrease the
rendering time significantly?

So, what/where are some good examples of using user paths? (I prefer simple
illustrative examples)  Would fontifying the symbols increase the drawing
speed?

Thanks,
Bill Murphy               | Old Home Cottage Cheese:  The only cottage 
			  | cheese that's not made from formaldehyde, 
murphy@physics.purdue.edu | arsenic, or rodent parts.
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From: murphy@gibbs.physics.purdue.edu (William J. Murphy)
Newsgroups: comp.sys.next.programmer
Subject: Using User Paths in a graphing program
Message-ID: <8003@dirac.physics.purdue.edu>
Date: 4 Aug 92 06:19:19 GMT
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Organization: Purdue University Physics Department
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