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Re: Fwd: another filter to consider?

From: Erik Dahlstrom <ed@opera.com>
Date: Mon, 18 Apr 2011 10:27:20 +0200
To: "public-fx@w3.org" <public-fx@w3.org>, ddailey <ddailey@zoominternet.net>, "Doug Schepers" <schepers@w3.org>
Message-ID: <op.vt4kfuadgeuyw5@localhost>
Hi David,

I'd be happy to hear some more details about that filter. Is it a  
simplified syntax for displacementmap transforms? Because it looked to me  
like it could be done with feDisplacementMap and gradients.


On Sat, 16 Apr 2011 19:08:06 +0200, Doug Schepers <schepers@w3.org> wrote:

> Forwarding to FXTF list, since we are now working on filters as a joint  
> SVG-CSS project.
>
> -------- Original Message --------
> Subject: 	another filter to consider?
> Resent-Date: 	Sat, 16 Apr 2011 15:57:01 +0000
> Resent-From: 	www-svg@w3.org
> Date: 	Sat, 16 Apr 2011 11:53:55 -0400
> From: 	David Dailey <ddailey@zoominternet.net>
> To: 	<www-svg@w3.org>
>
>
>
> Internet Explorer/ HTML/CSS has had, for at least 10 years, something
> present, I think, in versions 5 through 9, a wave filter. See
>
> http://srufaculty.sru.edu/david.dailey/javascript/ani/waves.html .
>
> If you don’t have IE, basically, it allows sinusoidal distortion of an
> image (until today I always used jpgs but today I discovered that it
> also works in IE9 with <img src=”file.svg”>, though the wave distortion
> is applied to a pixel-based rendition of the SVG file). It’s not quite
> as flexible, as I recall, as the bivariate sinusoidal wave function in
> Adobe Photoshop (that allows arbitrarily many generators to be added to
> the transform), but it is a step in the right direction!
>
> Anyhow, it is more what, in SVG, we would call a “transform” than a
> “filter”, but this sort of transform as well as projections (conic,
> spherical, and so forth) would be nice additions as well. I think the
> underlying math is probably simpler than the non-affine transforms being
> discussed for SVG 2.0.
>
> Applications are, as always, artistic, scientific and geographic.
>
> Regards
>
> David
>


-- 
Erik Dahlstrom, Core Technology Developer, Opera Software
Co-Chair, W3C SVG Working Group
Personal blog: http://my.opera.com/macdev_ed
Received on Monday, 18 April 2011 08:27:54 GMT

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