[Sidefx-houdini-list] Handle constraints

Edward Lam edward at sidefx.com
Wed Jun 20 10:09:16 EDT 2007


 > I'm trying to find a way to constrain the movement of a pivot handle.

Try Ctrl+LMB on an axis of the handle. A flat square should appear that 
allows you to drag on it that is constrained to the 2D plane.

-Edward

Stuart Ramsden wrote:
> 
> I'm trying to find a way to constrain the movement of a pivot handle.
> 
> In the simplest example, I want to provide a position/translation handle 
> to allow dragging, but in only 2 dimensions. For example, using a Grid 
> SOP, click and drag the 'center' parameter to the display window and 
> create a 'pivot handle'. The user can constrain motion to 1 degree of 
> freedom at a time, by clicking on the lines of the axis. Grabbing the 
> central box gives full 3 axis control. If the /tz param is locked, the 
> box vanishes, and so does the locked axis. I do get 2 degrees of 
> freedom, but only 1 degree at a time (bummer).
> 
> Does anyone know of a work around for this, or is there a way to 
> customize handles so that they can be made 2D only?
> 
> Thanks,
> 
> Stuart.
> 




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