Go(ne) Amigo??
12-Mar-91 12:46:42
Sb: #17147-Go(ne) Amigo??
Fm: John Pendergrass 76246,676
To: daniel wolf 70250,626
Daniel, re circles in FractalPro vs. Vista. Here's where I see the
problem: in FractalPro you draw a 320×400 screen. It takes about 20cm. to
draw 268 pixels in lores. It takes about 10.5cm to draw 268 pixels in
interlace. So each pixel actually represents an area ratio of about 2:1 of
the set, right? When you take this over to Vista, the data is mapped onto
a perfect 268×268 square grid, with a 1:1 ratio. So the data gets
scrunched horizontally, and you end up with ovals in Vista. Vista cannot
change anything, since it requires that its data already be in the correct
aspect ratio in its square grid.
Since the aspect ratio is (almost) exactly double, you could fix it in one
of two ways: 1) skip every other pixel vertically when generating Vista
data (but 2 times 268 = 536, and you only generate 400 rows, so you can't
do that). 2) Oversample the horizontal pixels… get actual data from only
the left 134 pixels, and interpolate a data point between each pair. You
would generate your Vista data from the lower-left 134(horiz) X 268(vert)
pixels. The interpolated horizontal points would give you a total of 268
horizontal points of data. Then you would have (very nearly) a circle in
Vista. I think 🙂
All I meant by suggesting that you use the center of the pic rather than
the lower-left is that I (and most others, I think) try to center the
interesting part of the image in the view, and so generating a Vista file
from this is much easier. I realize you can pan the image to get that part
in the lower left, but its just one more step. (also, I wanted to generate
a sequence of pics, AND to get .vis files for each as well. I had to do
the sequence twice — once centered for pics; once for the .vis files)
-I'll try to get some examples off to you soon. ttfn –jp–seattle–