[Sidefx-houdini-list] Handle constraints

Stuart Ramsden Stuart.Ramsden at anu.edu.au
Wed Jun 20 00:58:10 EDT 2007

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?



 Stuart Ramsden <Stuart.Ramsden at anu.edu.au>
 Research & Visualization, 
 Vizlab, ANU Supercomputer Facility,
 Australian National University, Canberra, ACT, Australia.		       

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