Hi Jens-Hanno, > i started correcting the dt problem with masks borders displayed at a wrong > position. > > There is a detail i don't understand and currently dont't know how to do. > > Lets assume i have a point p(x,y), x and y are both in the 0->1 range > covering the whole > raw data (no lensfun applied). > > So my question: > How can i calculate the position (also 0->1 range for both) **after** lensfun > correction?
This is done by a transform function in the IOP. Actually each IOP must provide a distort_transform() and distort_backtransform() function that will transform a set of points. Fact is lens.cc seems to have the very same implementation in transform and backtransform which is obviously pretty wrong. I had started fixing that, but it seems there is something more. I can create a PR with what I have now if you want to start from that, let me know. When mask needs it calls a generic transform function in one direction or the other in the pipe and this will trigger calls to transform functions for each active IOP. Hope this helps, -- Pascal Obry / Magny Les Hameaux (78) The best way to travel is by means of imagination http://www.obry.net gpg --keyserver keys.gnupg.net --recv-key F949BD3B ___________________________________________________________________________ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
