In article <38fd313b@news.povray.org>, "Bob Hughes" 
<per### [at] aolcom?subject=PoV-News:> wrote:


> | I don't do much animation work but I believe the difference is that the
> | first example will cause the death ray to appear at clock cycle 0.5 and
> | persist until it reaches a value of one - until the last frame of the
> | animation. With the second example you can have the death ray appear at
> | a clock value of 0.3 and then dissapear at the clock value of 0.5. The
> | second method offers a little more flexibility than does the first.
> 
> That's pretty much it, and for simplicity really.  You have to start 
> nesting those "#if" directives to get the same
> result.  Can get difficult to follow.

Okay, I understand. It wasn't an issue in the animation I'm doing now 
since I send the death ray off out of the picture, never to be seen 
again (it's more like the rays they used in Forbidden Planet, it you 
remember that one), but your way makes them able to disappear on cue, 
too. That's probably lots more useful for most apllications.

Thanks, everybody.

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