Hey, Following up on this thread. There's a Blink implementation of the panorama to panorama mapping up on Nukepedia now. http://www.nukepedia.com/blink/transform/environmenttransform
Hope that helps, HP On Mon, Aug 25, 2014 at 3:11 PM, Michael Garrett <michaeld...@gmail.com> wrote: > In fact I took maths for the angular map transform (latlong to angular, I > think) from an old Debevec Siggraph paper or something, or maybe the book > he wrote....so maybe that was yours too! Since I know you worked with him > on all that interesting stuff. > > > On 25 August 2014 03:17, Haarm-Pieter Duiker <l...@duikerresearch.com> > wrote: > >> Hey, >> >> That environment blur script has the start of what you need for a >> panorama transform node. That script defines the function >> 'spherical_tex2dir' that maps UV coordinates to directions. Define the >> inverse of that, mapping a direction back to UV coordinates and you have >> what you need for the spherical mapping. Do the same for angular, chrome >> ball and whatever other mapping you need and you have the pieces you need >> to write the full transform. >> >> The basic algorithm that I've used in the past was, for each output pixel: >> - map output pixel coordinate to UV >> - map UV coordinate to direction using the output panorama format >> - map direction to UV coordinate using the input panorama format >> - map UV coordinate to pixel coordinate and sample input image >> >> Oversampling, rotations and handling chrome balls vs. pan-and-tile panos >> (reflections vs. direct view) should be pretty easy to add on top of that. >> >> If I get some time this week, I can take a look at putting that together. >> The formats I used to have supported were Spherical, Angular, Fisheye (180 >> degree), Chrome Ball and Cubic (but that was a little funky). What other >> pano formats are needed? >> >> HP >> >> >> >> >> >> On Sun, Aug 24, 2014 at 7:07 PM, Michael Garrett <michaeld...@gmail.com> >> wrote: >> >>> I put it together before I knew about that 0.5 pixel offset trick, I >>> would say it needs updating but then Haarm-Pieter Duiker's blink >>> EnvironmentBlur node looks like the real deal. >>> >>> http://www.nukepedia.com/blink/filter/environmentblur >>> >>> >>> On 24 August 2014 19:02, Patrick Heinen <mailingli...@patrickheinen.com> >>> wrote: >>> >>>> Yeah I picked your EnvConvolve apart the other day to have a uv mapped >>>> spherical transform ;) (by the way, don't forget your +0.5's for pixel >>>> center) >>>> I think a blink spherical transform would be worth it, seeing that >>>> nuke's spherical transform is pretty slow. >>>> I might give it some more thought tonight. >>>> >>>> cheers, >>>> Patrick >>>> >>>> On 24.08.2014, at 15:51, Michael Garrett <michaeld...@gmail.com> wrote: >>>> >>>> Definitely possible. I've seen a couple of UV map Blink things already >>>> but haven't actually done anything myself yet. For example: >>>> http://nickdeboar.wordpress.com/2014/01/02/nuke-8-blink-script/ >>>> >>>> I have the UV map math for some of the transforms and it could be >>>> applied to Blink for sure. Have a look at the innards of my somewhat out of >>>> date EnvConvolve gizmo (which may need fixing...): >>>> >>>> http://www.nukepedia.com/gizmos/filter/envconvolve >>>> >>>> >>>> On 24 August 2014 18:31, Frank Rueter|OHUfx <fr...@ohufx.com> wrote: >>>> >>>>> Possible? Worth it? Anybody up for it? :) >>>>> >>>>> >>>>> >>>>> -- >>>>> <ohufxLogo_50x50.png> <http://www.ohufx.com/> *vfx compositing >>>>> <http://ohufx.com/index.php/vfx-compositing> | workflow customisation and >>>>> consulting <http://ohufx.com/index.php/vfx-customising> * >>>>> >>>>> _______________________________________________ >>>>> Nuke-users mailing list >>>>> Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ >>>>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>>>> >>>> >>>> _______________________________________________ >>>> Nuke-users mailing list >>>> Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ >>>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>>> >>>> >>>> >>>> _______________________________________________ >>>> Nuke-users mailing list >>>> Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ >>>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>>> >>> >>> >>> _______________________________________________ >>> Nuke-users mailing list >>> Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ >>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>> >> >> >> _______________________________________________ >> Nuke-users mailing list >> Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> > > > _______________________________________________ > Nuke-users mailing list > Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >
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