Raycast weight map

[Stefan Andersson]

Hi all,

I'm trying to figure out how to raycast a parallel direction (much
like a directional light) onto a mesh. And I'm not sure how to go
about it.
Best would be if I somehow could use the objects world normals... Then
I could filter that to be a weight map.

Do I make sense?

Anyhow, a pointer in the right direction would most helpful.

Stefan Andersson
Creative Director

Mad Crew
Roddargatan 8
116 20 Stockholm
SWEDEN

mail: ste...@madcrew.se
cell: +46-73-6268850
web: http://www.madcrew.se

[Paul Smith]

Im not entirely sure what you mean but If you want all your points to
raycast in the same direction ( parallel) then just put one vector in for
them all to use. IE. dont use anything that is different per-point like
normals, or point position.. Just adjust the single 3d vector direction on
the raycast node and they will all be in parallel.

[Matt Lowery]

There was a tutorial video, by Paul Smith I believe, about using ICE to
build a ray-trace renderer a while back.That might be a good place to start
http://vimeo.com/20331231

Not exactly what you are looking for I know, but it might get you
pointed in the right direction.
m@

[Thomas Volkmann]

Like this, or did I get it wrong?

Stefan Andersson <ste...@madcrew.se> hat am 24. Januar 2012 um 11:07 geschrieben: