On Wednesday, January 6, 2010 at 17:00:40 (-0800) David MacMahon writes: > Hi, Alan, > > On Jan 6, 2010, at 9:03 , Alan W. Irwin wrote: > > > If we have a mixture of C and Fortran ordering for the two-dimensional > > arrays in our API, we should decide which convention we should use > > in our > > API and convert to it if/when we decide to do other major API > > breakage we > > have been discussing. > > I guess I joined the list after that discussion, but I think it would > be great if the API supported the following four ways of passing in > 2D data... > > 1) 1D array of nx pointers to 1D arrays of ny values > 2) 1D array of ny pointers to 1D arrays of nx values > 3) Pointer to 1D array of nx*ny values in row major order > 4) Pointer to 1D array of nx*ny values in column major order > > This may be somewhat of a grandiose, idealistic wish, but it would > support the most common ways of specifying 2D data without requiring > (potentially expensive) transposition of the data. I haven't gotten > too far into the other 3D-ish functions yet, but some (e.g. plcont) > accept a "transformation" function pointer through which lookups > occur. Perhaps this mechanism (or something similar) could be used > to provide the level of flexibility I'm suggesting (and beyond!).
Some centuries ago I did endow the contourer with the function evaluator technique to deal with the issue of C vs Fortran vs whatever array storage. Worked out nicely IMO. Would've liked to upgrade all array-handling functions in like fashion but so far I think it's only been done for the plshadexx family. -- Maurice LeBrun ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
