Try this: (from Bob Spelten Jr. homepage) G-RATIO. Jens Wildgruber made a small extension which corrects the original QL graphics commands. Strange circles in other resolutions than the old 512x256? Not any longer with G-RATIO. Click here <http://members.upc.nl/b.spelten/ql/files/g_ratio.zip> to download the zip.
Unfortunately, it is not compatible with QDT Giorgio Garabello 2017-04-28 13:52 GMT+02:00 Jan Bredenbeek <j...@bredenbeek.net>: > I'm sorry if this question has been answered before, but I've run into an > issue with SMSQ/E's graphics system. > When you use the CIRCLE command on a window with an aspect ratio of, say, > 3:2 (on the screen, not in pixels since the graphics coordinate system is > pixel-independent!) and type: > > CIRCLE 75,50,50 > > you get a circle exactly in the centre of the window which exactly fits the > window in vertical direction (assuming standard SCALE setting of 100,0,0). > But when you enter this command on SMSQ/E, assuming a window with exactly > the same aspect ratio, the circle becomes an ellipse which partly falls off > the right edge of the window. > > I'm aware of the fact that the native QL screen has non-square pixels (the > width/height ratio of a pixel is 0.738; combined with the 512x256 > resolution this yields an aspect ratio of about 3:2 or 1.476 to be exact). > QDOS and Minerva compensate for this in the graphics routines so that the > scale in horizontal direction is the same as in vertical direction (the > Minerva source code is in fig.asm). > However, on PC-emulated screens pixels have a different aspect ratio (I > guess mostly 1:1). It appears that the graphics coordinate system on SMSQ/E > still tries to adjust for the native QL pixel aspect ratio, leading to > incorrect X/Y scale ratio on the graphics screen. > AFAIK there is no way to adjust for this error, short of changing > application programs. The SCALE command doesn't help, as there is only one > SCALE parameter that sets the scale for both X and Y directions. > > Anyone got an idea? > > Jan. > > -- > *Jan Bredenbeek* | Hilversum, NL | j...@bredenbeek.net > _______________________________________________ > QL-Users Mailing List > _______________________________________________ QL-Users Mailing List
