I calculated some different sizes of (and also varied "float=" on) Mr Helie's November 3, 2011 "7dimcful" 'seven dimension image' using DOS Fractint version 20.04.4 I don't know what the behavior of Fractint is when there is no bailout test specified, so I don't know how the program determined when to stop iterating -- perhaps it silently traps overflow and then moves on to the next pixel calculation. Anyone know what Fractint does when a bailout test isn't specified? <---<< To try and zoom out as far as possible -- to show a parent fractal, I first used "float=y". With float=y the fractal appears infinite in extent. Three images are anti-aliased. Be sure to click the image to see it full size. Parent at Fractint's limit of zooming out in floating point mode: http://www.emarketingiseasy.com/TESTS/FOTD/7DIMCFLZ.GIF A sequence zooming in: http://www.emarketingiseasy.com/TESTS/FOTD/7DIMCFLY.GIF http://www.emarketingiseasy.com/TESTS/FOTD/7DIMCFLX.GIF http://www.emarketingiseasy.com/TESTS/FOTD/7DIMCFLW.GIF http://www.emarketingiseasy.com/TESTS/FOTD/7DIMCFLV.GIF http://www.emarketingiseasy.com/TESTS/FOTD/7DIMCFLU.GIF http://www.emarketingiseasy.com/TESTS/FOTD/7DIMCFLT.GIF http://www.emarketingiseasy.com/TESTS/FOTD/7DIMCFLS.jpg Nice http://www.emarketingiseasy.com/TESTS/FOTD/7DIMCFLR.jpg Nice http://www.emarketingiseasy.com/TESTS/FOTD/7DIMCFLQ.jpg Nice Changing to Mr. Helie's original (default) "float=n" changes the fractal's appearance. 7DIMCFLN.GIF is the same as the float=y 7DIMCFLW.GIF above. http://www.emarketingiseasy.com/TESTS/FOTD/7DIMCFLN.GIF 7DIMCFLM.GIF is the same as the float=y 7DIMCFLV.GIF above. http://www.emarketingiseasy.com/TESTS/FOTD/7DIMCFLM.GIF For reference, Mr. Helie's par set he posted to the [Fractint] list serve November 3, 2011 -- that I used to calculate the above fractals -- is below. His original fractal calculated with passes=1 is here: http://www.emarketingiseasy.com/TESTS/FOTD/7DIMCFLO.GIF (Which is similar in magnification to 7DIMCFLN.GIF above.) - Hal Lane ######################## # hallane@earthlink.net ######################## ======= Sebastian Helie's 7dimcful ============================== 7dimcful { ; Use to be a seven dimension image ; now probably only 4 ; a excelent star source. ; for my master. My best reset=2000 type=formula formulafile=frame1.frm formulaname=220709_9 corners=-20/20.00001/-14.99999/15 colors=0000000e00eee00e0eeL0eeeLLLLLzLzLLzzzLLzLzzzLzzz000555<3>HHHKKKOO\ O<3>ccchhhmmmssszzz00z<3>z0z<3>z00<3>zz0<3>0z0<3>0zz<2>0GzVVz<3>zVz<3>zV\ V<3>zzV<3>VzV<3>Vzz<2>Vbzhhz<3>zhz<3>zhh<3>zzh<3>hzh<3>hzz<2>hlz00S<3>S0\ S<3>S00<3>SS0<3>0S0<3>0SS<2>07SEES<3>SES<3>SEE<3>SSE<3>ESE<3>ESS<2>EHSKK\ S<2>QKSSKSSKQSKOSKMSKK<2>SQKSSKQSKOSKMSKKSK<2>KSQKSSKQSKOSKMS00G<3>G0G<3\
G00<3>GG0<3>0G0<3>0GG<2>04G88G<2>E8GG8GG8EG8CG8AG88<2>GE8GG8EG8CG8AG88G\ 8<2>8GE8GG8EG8CG8AGBBG<2>FBGGBGGBFGBDGBCGBB<2>GFBGGBFGBDGBCGBBGB<2>BGFBG\ GBFGBDGBCG000<6>000 }
frm:220709_9{;sinpix12823 at gmail do t com z=pixel: x=real(z*0.66) y=imag(z*0.66) c=1.618*z*x*y z=tan(z)+sin(x)+cos(c)*(0.22*z) } ===============================================
Hal Lane wrote:
Anyone know what Fractint does when a bailout test isn't specified? <---<<
IIRC that's something Jonathan Osuch has answered some time ago: The parser works quite similar to the C language in that regard, that is a) all expressions return a result and b) a result of zero is interpreted as boolean false, everything not zero is boolean true. So if there's no specific bailout test at the formula's end, Fractint takes the last expression and interprets it as true/false no matter what. There might exist some kind of overflow bailout, too. Regards, Gerald
participants (2)
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Gerald K. Dobiasovsky -
Hal Lane