[Sidefx-houdini-list] Point cloud interpolation in SOPs?

Peter Bowmar pbowmar at gmail.com
Wed May 9 09:19:13 EDT 2007


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On 09/05/07, Peter Robbinson <probbins at sympatico.ca> wrote:
> How about this then.
>
> PeterR
>
> On Wed, 2007-05-09 at 13:22 +0100, Peter Bowmar wrote:
> > Hi Peter,
> >     Har, that's exactly the first thing I tried! The problem was
> > creating a coherency of associated points so that the Add SOP doesn't
> > try to connect points that are too far apart from each other. Picture
> > a ball of points falling into a rectangle of points. The ball and
> > rectangle shouldn't be connected until they hit. Meta-ballish but I
> > don't want to just copy Metaballs on there (doing that already, and it
> > isn't working that well).
> >
> > Cheers,
> >
> > Peter B
> >
> > On 09/05/07, Peter Robbinson <probbins at sympatico.ca> wrote:
> > > Since I like avoiding scripting, what about running the cloud through an
> > > add sop, generating a curve by primitive group, then refining the
> > > resulting curve?
> > >
> > > PeterR
> > >
> > >
> > >
> > > On Wed, 2007-05-09 at 12:25 +0100, Peter Bowmar wrote:
> > > > Hi,
> > > >      So, I've got this cloud of points, that are roughly in the shape
> > > > of some objects. They're moving around.  I want to add more points,
> > > > interpolated (linear is fine) between the existing points. I don't
> > > > want to have new points "outside" the existing objects, in other words
> > > > the interpolation should happen within a distance threshold of other
> > > > points, effectively adding more density to the point cloud without
> > > > altering its "shape". I have thought of a few ways of doing this using
> > > > pciterate() etc in VEX to create "normals" that give me the direction
> > > > of max density etc. However, before I dive in, am I missing anything
> > > > obvious?
> > > >
> > > > Cheers,
> > > >
> > > > peter B
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> > > --
> > > "gravity is not a force, it is a boundary layer"
> > > "everything is coincident"
> > > "Love: the state of suspended anticipation"
> > > "To get any appreciable distance from the Earth in
> > > a sensible amount of time, you must lie."
> > >
> > >
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> --
> "gravity is not a force, it is a boundary layer"
> "everything is coincident"
> "Love: the state of suspended anticipation"
> "To get any appreciable distance from the Earth in
> a sensible amount of time, you must lie."
>
>
> _______________________________________________
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