[pstricks] psRandom (PSTricks-add command) and Beamer overlays

Christian Häger christianhaeger at me.com
Wed Sep 19 13:09:16 CEST 2012


consider the following minimal example, where the \psRandom command is used to draw random points on a slide, together with an overlay. 


	\uncover<2>{I am an overlay}

The effect is that on the second slide, where the overlay appears, the random points are changing. I assume that this is because beamer automatically copies the \psRandom command on each overlay-slide and therefore draws new random points on every slide. Is there a possibility to have the same random points appear on every slide? I don't know how the \psRandom command works but maybe it uses some input seed for a random number generator which could be frozen for the slide? 

Thanks in Advance!

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