A More Useful Multi-Input Effect

A Series on GPU-based Effects for WPF

Greg Schechter's Blog — Sun, 28 Sep 2008 05:04:40 GMT

GPU-based Effects are a hot new feature in WPF for .NET 3.5 SP1. I'm going to be blogging a series of

re: A More Useful Multi-Input Effect

OJ — Mon, 29 Sep 2008 05:00:09 GMT

Hi Greg,

This is a nice post. I would like to just point out one thing though. You said:

"This is knows as 'displacement mapping'..."

This is actually incorrect. Displacement mapping is where the actual geometry of the mesh that your applying your shader to is modified/displaced.

See here:

http://en.wikipedia.org/wiki/Displacement_mapping

What you're doing is a bit of funky bump mapping.

Thanks for the great article.

Cheers.

re: A More Useful Multi-Input Effect

Greg Schechter — Sun, 05 Oct 2008 20:15:13 GMT

OJ, thanks for pointing out the Displacement Mapping wiki definition. I'm really using the term in the same manner that it's used in Photoshop, where the Filter > Distort > Displace option refers to using a displacement map, and the shader I wrote behaves identically to what is done in Photoshop (including using the red channel to displace horizontally and the green channel to displace vertically).

Thanks,

Greg

Why limiting to PS 2.0

Nick — Tue, 07 Oct 2008 02:20:21 GMT

Hi Greg,

why are WPF Shaders limited to only PixelShaders and why is only PS 2.0 supported.

Some interesting (usefull) effects can not be achieved with these limitations...

Is that going to change in the near future?

Cheers N

re: A More Useful Multi-Input Effect

tony chen — Wed, 08 Oct 2008 13:06:29 GMT

can you explain the reason as description in the link ?? its about the DWM under VISTA .

Thanks

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