Cute Skunk wrote:
By the way, I don't know if anyone else has noticed this before, > but in XFractint if you zoom in and zoom in, eventually your (X) resolution drops and drops to 1 (or 0?), so that you just get abunch of horizontal lines. I havn't tracked it down yet, but it happens in Xfract 20.2.x and does *not* happen in Dos fractint 20.2.x. It does seem to correlate with about the time that the dos version switches over to using arbitrary precision. The XFractint version doesn't stop using floating point at the same magnifications. (Like around 10e14 to 10e15)
There is some VERY Ad. Hoc. logic for detecting the limits of resolution. Sounds like this is the logic that's not working. The logic is in frasubr.c. Search for variables like ratio_bad. There are some command line variables that let one play with this. Checkout the variable mathtolerance. My suggestion is to add this issue to a todo list for later. It would be a good thing to revevisit after a major rewrite is done. Tim
The easiest way to see this bug is, from the first Mandelbrot set, just zoom in on your favorite feature all the way about 11 times, and the (X) resulution should start to drop. (By zoom in all the way, I mean hold <page up> until the zoom box gets as small as it does)
_______________________________________________ Fractdev mailing list Fractdev@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/fractdev