[Sidefx-houdini-list] baking coverage into point particles
mark at sidefx.com
Thu Dec 10 07:12:42 EST 2009
On Wednesday Dec 09 at 22:00, Michael K. O'Brien wrote:
> I have a set of semi-transparent points (disks) and a light. I'd like to
> bake the visibility of the points as seen from the light. Basically, I want
> to project a ray from each point to the light and sum up the transparency as
> I go. Is there a way to do something like that in Houdini?
Isn't this a deep shadow map? Or do you need it geometrically?
If you have a DSM/DCM, you should be able to sample the data in a VEX
There may be other solutions (with either VEX ray-intersection (yes
there is ray intersection in SOPs) or the Ray SOP).
How many points?
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