can't remember which node but Mr Munch (?) geometry tools has a tool that can read the concatenated position of an object.
apologies if his name is wrong but he mentioned this in a similar ish thread a while ago. Howard On 18 Sep 2013, at 02:45, Michael Garrett <[email protected]> wrote: > Normally I would say you can use the world_matrix knob of the TransformGeo to > get the concatenated position (using cels 3, 7 and 11) but it depends on > whether the geometry itself already has a baked in offset or not - meaning is > it reading in at the origin or not. > > If it's not animated and you need that offset value in world space, you could > easily snap an Axis to a vertex of the geometry that you want to be the > Camera focal point, then parent another Axis that represents the TransformGeo > and read off the concatenated transform from the child Axis world_matrix > knob. You would then use the expression Olivier posted to get the distance. > > > On 17 September 2013 19:41, Gustaf Nilsson <[email protected]> wrote: >> Yes, but that is not possible when you have a transformgeo-node connected to >> the geometry as there is no way (?) of getting its world coordinates. >> >> >> On Tue, Sep 17, 2013 at 6:56 PM, Olivier Lavenant >> <[email protected]> wrote: >>> You can use the expression : sqrt[(Xa-Xb)²+(Ya-Yb)²+(Za-Zb)²] >>> >>> >>> 2013/9/17 Gustaf Nilsson <[email protected]> >>>> heya >>>> >>>> Is it possible to get the distance between the camera and an object in 3d >>>> space that has an arbitrary number of transforms below it? >>>> >>>> Thanks >>>> >>>> -- >>>> ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ >>>> >>>> _______________________________________________ >>>> Nuke-users mailing list >>>> [email protected], http://forums.thefoundry.co.uk/ >>>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>> >>> >>> _______________________________________________ >>> Nuke-users mailing list >>> [email protected], http://forums.thefoundry.co.uk/ >>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> >> >> >> -- >> ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ >> >> _______________________________________________ >> Nuke-users mailing list >> [email protected], http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
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