Hello Craig: > Numerical Jacobian calculation is not so bad in terms of coding effort The issue is that, if I understand correctly, GEGL's current "pure" demand-driven structure means that resamplers have no information whatsoever about what other nearby locations are being resampled, and consequently there would need to be major changes to make this info available for arbitrary transformations (with, most likely, serious speed impact). Once you have it, sure, computing approximate Jacobian matrices is no big deal (provided you make sure that you stay from singularity). Hence my pragmatic choice to reserve the use of the "novel" (not so sure anymore that it's really new) method for tasks for which the jacobian is easy to compute and pass on. (This is the: "ask people who know better" part.) Does this make sense to you? Nicolas Robidoux Universite Laurentienne _______________________________________________ Gimp-developer mailing list Gimp-developer@xxxxxxxxxxxxxxxxxxxxxx https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
