Cheers for that... I think this is definitely down the right path, also potentially useful for lots of other stuff.
I ended up being able to work around needing the concatenated corner pins in this case by going into mocha and getting the exact cornerpin I needed in there (its tracker worked better than nukes in this case) and one other shot I had a 3D track for and did lots of reconcile 3D juggling to get the coreners I needed. In reference to oliviers post as well I might still be missing something you're referrring to but I adsolutely positively have to derive corner pins as the data is being text exported to run a real time corner pin inside flash where the code is using the corner pins to distort a user uploaded image. So no screen based per pixel distortions only corner. Cheers, Dave -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Stephen Newbold Sent: Friday, 20 July 2012 7:52 PM To: Nuke Python discussion Subject: Re: [Nuke-python] how to derive concatenated cornerpin coords Not sure if this is entirely what you are after but look at this post. http://forums.thefoundry.co.uk/phpBB2/viewtopic.php?t=5807&sid=3a0080466223a0e24bdf0d2a95643aa0 Here Ivan explains how to generate a transformation matrix from your cornerpin. I guess then you can simply transform your tracker positions with this matrix and export the data as you usually would for your other system? Steve [email protected] wrote: > We use that technique for our stereo prep to align 1 eye to the other. > They are custom tools but based on STmap. > It works like a displacement map, i don't see why an other system > couldn't get the same result > > Dave McDonnell wrote: >> Heya >> >> I actually need to derive 2D corner pins tho for the system we're >> sending it to. So I'm still left with generating those from a UV map >> unless there's something I'm missing. >> >> Cheers, >> >> Dave >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of >> [email protected] >> Sent: Friday, 20 July 2012 1:01 AM >> To: Nuke Python discussion >> Subject: Re: [Nuke-python] how to derive concatenated cornerpin >> coords >> >> You could create a UV map that would be the baked result of any >> transform you did, no need to script. >> >> Dave McDonnell wrote: >> >>> Hey everyone >>> >>> I need to export 2D corner pin data to another system from Nuke from >>> a concatenated corner pin. >>> >>> Basically I have trackers in the middle of a plane that I have >>> tracked, upstream from that cornerpin I have another cornerpin that >>> is there to push the corners to where they are really meant to be as >>> the trackable points are offset from the corners somewhat. >>> >>> What I'd like to get is the 2D screen points of the upstream corners >>> as transformed by the downstream cornerpin. >>> >>> Is this doable? Any help much appreciated. >>> >>> Cheers >>> >>> Dave >>> -------------------------------------------------------------------- >>> -- >>> -- >>> >>> _______________________________________________ >>> Nuke-python mailing list >>> [email protected], >>> http://forums.thefoundry.co.uk/ >>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-python >>> >> >> _______________________________________________ >> Nuke-python mailing list >> [email protected], http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-python >> _______________________________________________ >> Nuke-python mailing list >> [email protected], http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-python >> > > _______________________________________________ > Nuke-python mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-python -- Stephen Newbold Compositing Lead - Film MPC 127 Wardour Street Soho, London, W1F 0NL Main - + 44 (0) 20 7434 3100 www.moving-picture.com _______________________________________________ Nuke-python mailing list [email protected], http://forums.thefoundry.co.uk/ http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-python _______________________________________________ Nuke-python mailing list [email protected], http://forums.thefoundry.co.uk/ http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-python
