jon@csd4.milw.wisc.edu (Jon George Seidl) (01/07/88)
Hi!
I'm been changing an AMIGA WORLD program to make it compatible with this
system. I'm hoping to generate the data here and download it to my
Amiga.
Anyway, the program is in the May/June 1987 issue of the magazine,
pages 18-24 (essentially) entitle GRAPHIC SCENE SIMULATIONS by
Eric Graham. The questions I have regard the values that are used
to initialize the observer's characteristics. Specifically, VIEWDIR,
UHAT, VHAT, and FL.
The author mentions that "two numbers, one for the number of degrees
it is pointing away from north, and one for how many degrees it [the
imaginary camera] is pointing above or below the horizon" are needed
for VIEWDIR. Yet, VIEWDIR is an array of THREE numbers. How do the three
numbers relate to the "cameras" direction?
How do UHAT, VHAT and FL relate to the picture to be generated (in other
words, what do they do??).
Please help if you can. I don't get much of a chance to read this group,
so please E-mail, if possible.
Jon
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