Re: presentations

[Hans Hagen <pragma@wxs.nl>]

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At 06:51 PM 10/30/2001 +0100, Patrick Gundlach wrote:
>Hi,
>
>i would like to make a presentation with the following feature:
>
>item 1
>
>item 2
>
>item 3
>
>first, item 1 is displayed in black and the other two items in
>grey. Second the first and second items are displayed in black
>and number three in grey and at last, all three items are
>displayed in black.
>
>And, as an additional problem:
>is it possible to define two colors a and b and another color c
>which is "in the middle" of a and b? Something like c=(a+b)/2?
>That is for the problem above where the shadowed items should
>not be displayed in grey but in the color that is closer to the
>current backgroundcolor.

i've attached an example of how to write something like that; actually it's 
a simplified version of one of the more recent presentation styles (no. 29, 
still to be documented); this example also demonstrates how you can 
(mis)use layers so i guess that for instance source code lovers like GB 
will like it -)

>As far as I have seen, the \presentationstep does not do this. (module
>pre-general)
>(And, additionally it seems to be broken if one goes to the
>beginning of the document and try to do the steps
>again.)

i will look into pres steps later, since i have to make it robust for acro 5

Hans

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