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LandScape.release_notes
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1991-08-10
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Release Notes for LandScape V1.0
================================
V1.0 of LandScape has been released with the following known bugs or
deficiencies. None of these should affect you during normal usage of the
program.
1) The depth-arranging algorithm is not 100% accurate. This is the part of
the program that sorts out the order that plants are draw, so that plants
that are closer to the viewpoint are drawn last, so that they overlay the
ones behind. I have picked a very simple way of doing this, and it works
surprisingly well, but not perfectly, in particular at low elevations
(20 degrees to 40 degrees) in conditions where very tall objects are
close to very small ones.
2) When rotating the garden at low elevations (20 or 30 degrees), a
rectangular garden appears to elongate as it approaches t1=90 degrees.
The visual impression is that the elevation is increasing. In fact, the
graphics routines are correct, but the aspect ratio of the screen gives
rise to this illusion. I may introduce some vertical compression (take
account of pixel aspect ratio) if this bothers people.
3) The drawing routines assume that all garden objects are contained inside
the garden boundary, although the program will allow you to draw outside
of it if you wish. Under certain rare circumstances, however, drawing
outside of the garden boundary will crash the program, and so you are
strongly advised not to do this.
4) Since the plants are drawn mathematically, they look best at reasonable
viewing distances. If you zoom in VERY close to a plant, it will not look
nearly as good.
5) Since the drawing routines use single precision FFP numbers, if you spin
the garden around a lot when selecting a viewpoint, you may find that
rounding errors start to accumulate, and the garden will do something
strange (like maybe slide off the screen). I have never tried this, and
never seen it happen in normal use, but you have been warned.
6) The coordinates on the 'what is' requester are a bit anachronous.
7) If two or more objects are placed at identical coordinates, it is only
ever possible to 'select' one of them.
[Built from RCS revision V1_0, SAS C 5.10a]