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From: [e-mail]
Subject: Re: a light swell
To: Mike McCool <[e-mail]>
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On Sun, 22 Oct 1995, Mike McCool <[e-mail]> wrote:
>I'm still working on rippling water, and have gotten it to move pretty
>convincingly, but I'd like to generate a gentle swelling effect.
>
>With texture velocity in the X and Z planes, I can get water to ripple
>back and forth across the screen, and into and out of the screen,--but I
>can't figure out how to get it to go gently up and down.
>
>I would have thought this was simply a matter of setting up a texture
>velocity in the y-plane,--but no show.


    Texture velocity moves the CENTER of the ripple effect, the parameter
that is set by TEXTURE CENTER.  Actually, you should never have to move this for
a "straight" ripple effect, although it might be desirable for special effects.

    [BTW, PLUGIN PROGRAMMERS:  Since the TEXTURE CENTER is a parameter that
is not animatable, this is a prime target for a plugin, which would simply move
the TC to a specific place on any given frame.  Specifically, one could assign a
motion path to the TC, perhaps using a null point for control.  Think about it:
it should be easy.  ]

    For ripple speed, I would think that the WAVE SPEED would be the
important parameter.  For height, one would use AMPLITUDE.

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