On Mon, Apr 12, 2010 at 4:38 PM, David MacMahon <dav...@astro.berkeley.edu> wrote: > > On Apr 12, 2010, at 9:33 , Hezekiah M. Carty wrote: > >> The global transform is applied after the "pltr"-type transforms, >> While the signatures are the same, I'm not sure that pltr[0-2] could >> be used with plstransform in a simple manner. The intent of the >> function is closer to that of the mapform parameter in plmap and >> plmeridians where the transform is from unprojected world coordinates >> -> projected world coordinates. If I recall correctly, the pltr* >> functions transform data-grid coordinates ((0, 0) to (nx -1, ny - 1)) >> to world coordinates so they may not work with plstransform exactly as >> they are, at least not in all cases. They do, however, still play an >> important role. > > Thanks for that clarification. This leads to my next question! :-) > > Are the world coordinates given to plenv etc the projected (i.e. > transformed) world coordinates? >
plenv etc. are not currently affected by the transformed coordinates, so in its current state you must set the window extents in a manner appropriate to the transform being used. Axis tick marks and labels are not handled in a special way either. > If one has setup a transformation like the example you included in you > original message, would a "plline" call to plot a line between points of > equal latitude but different longitudes still draw a straight line while a > "plpath" call to do the same would draw an arc according to the established > transformation? > Yes, that is correct. Internally, plpath calls pljoin if no transform is defined. If a transform is defined then it calls plline with n segments approximating the transformed curve. Hez ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
