[Sidefx-houdini-list] Transform axis

Larry Giunta larry at gcreativestudios.com
Wed Feb 28 10:31:42 EST 2007

Perfect Jerry, Thanks.

I just needed to drop a sort and
point SOP ( off the dissolve SOP)
to get the normals pointing
in the right direction.

Then the point expression in the
transform axis SOP snapped everything
into place.

Yeah, I was looking for a "non manual" way
to do this so this really helps.

Thanks again,


Larry Giunta
Creative Director
G Creative Studios
larry at gcreativestudios.com

On Feb 27, 2007, at 5:17 PM, Jerry Corda-Stanley wrote:

> if you want a manual solution you can use a transform SOP, disconnect
> the transform handle using
> then ctrl right click (I think) start orientation picking, select 3
> points and your handle will snap to your
> edge.
> with the transform axis SOP. think of the direction as a normal, or  
> the
> direction from point0 to point1
> on your edge. you can get that from a simple point expression in the
> direction fields.
> hope that helps some.
>> I'm trying to figure out a way to select
>> any edge on a poly model and then
>> be able to rotate the object around
>> that edge (like an axis)
>> So far, as an example, I've tried to
>> 1. drop down a default poly sphere
>> 2. branch a transformaxis SOP off to one side.
>> 3. go back to the poly and select any edge
>> 4. then dissolve away all edges but that one.
>> I can then source the centroid of that edge,
>> in the origin fields of the transformaxis SOP,
>> and that part works. I can rotate around that
>> point.
>> However, direction is the problem. I can't figure
>> out what to put in the direction fields (of the
>> transformaxis SOP) so the object can be rotated
>> around that edge exactly like an axis.
>> I hope I'm not missing something really simple.
>> Thanks for any thoughts.
>> Larry
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