; Date: Thu, 18 Feb 2010 22:36:26 -0500 ; From: Jim Muth ; Subject: [Fractint] FOTD 19-02-10 (A Slipped Disk [7.5]) ; Id: <1.5.4.16.20100218223733.2ba74394@pop.mindspring.com> ; --------- ; ; FOTD -- February 19, 2010 (Rating 7.5) ; ; Fractal visionaries and enthusiasts: ; ; Today's image is named "A Slipped Disk". This does not refer ; to a medical condition; it refers to the Siegel disks in the ; fractal, which have suffered some kind of slippage. ; ; Actually, there are no Siegel disks at all in the image. Siegel ; disks are purely Julia objects, while today's image, which is ; rotated 0.02,0.02 degrees from the Julia orientation, comes ; close but wins no cigar. In this case, the tiny rotation makes ; a world of difference. ; ; Actually, I have never had a clear idea of exactly what makes a ; Siegel disk. I know the disks appear in the Julia sets of ; points on the edge of the Mandelbrot set, but just what parts of ; these Julia sets are called Siegel disks? ; ; Well, I guess it really doesn't matter. As today's image shows, ; not-quite-Siegel disks can make interesting images, especially ; when they are rendered with the inside set to 'bof61'. ; ; The rating of 7.5 includes a small bonus for the coloring. The ; calculation time of 30 seconds will pass in a flash, as fast in ; fact as the trip to view the finished image on the FOTD web site ; at: ; ; ; ; Thursday featured partly cloudy skies and a temperature of 39F ; +4C here at Fractal Central. The fractal cats, who dislike ; partly cloudy weather with its on-and-off sunshine, spent only ; a few minutes on their sun-shelf before seeking the artificial ; heat of the large radiator in the hallway. ; ; My day was close to normal; tomorrow should be the same. The ; next FOTD will be posted in 24 hours. Until then, take care, ; and speak with some wisdom. ; ; ; Jim Muth ; jamth@mindspring.com ; jimmuth@aol.com ; ; ; START PARAMETER FILE======================================= A_Slipped_Disk { ; time=0:00:29.86-SF5 on P4-2000 reset=2004 type=formula formulafile=basicer.frm formulaname=SliceJulibrot4 center-mag=0/0/0.94 params=89.98/0/89.98/0/-0.390541/-0.586788/0/0/2/0 float=y maxiter=500 inside=bof61 logmap=yes symmetry=none periodicity=6 colors=000hkNjlRlmUmnYoo`qpcrqgtrjvsmwtqyutzvwzzzw\ wwuuuyrhyodylayhYydUy`RyXNyRJyPGsTHnXIh_JccKYfLTjM\ OmMGfK8_I0UG6SMCQRHOXNMaTKgYIlcGrhEweCrbAn`8jaAgbC\ dbEacFZcHWdJUdLReMOfOLfQIgSGgTDhVAhX7iZ4i_2gb8edDc\ gIaiN_lSZnYXqbVsgTvlRxqQzvMowIdxEUyAKzDLsFMmHNgJOa\ aazbZxbWwbTvbQubNtbLsbIqbFpbCob9nb6mb4l`5k_6kZ7kY7\ kX8kW9kV9kUAjTBjSCjRCjQDjPEjOEjSHiVKiYNiaQidShgVhk\ Yhn`hqbhq`fqZeqXdqVcqUaqS`qQ_qOZqNYmO_jO`gOacOc`Pd\ YPeUPgRPhOQiKQkHQlEQmLcXSqGUkMVeRW`WYVaZPf_KkVIiRG\ hNEfJDeFBcB9b78a9UlBnvEnsHnqJnoMnmOnkRniTngWneZnc`\ nacn_enYhnWjnUmnSonQppSpqTprUqsVqtXquYrvZrw_rx`mwY\ ivWeuTatRYsOUsMQrKMqHIpFEoCAnA6n87oD8pI8qN9rS9rWKh\ TV_QeQNoHKkNNhTQdZTadWYjZVo`RpZNpYJqXFqWBqU7rT3rS0\ rR7kSEdTKYURRVYKWcDXj6Yp0Zq6_qC_rH_rN`rS`sY`sb`sha\ tmatsatxaikZZ_WONTEBQA8N75L42J10z8hzF`cGVzHPcIJzJD\ cK7zK2cfezTMbF2z2vzKmzV0m } frm:SliceJulibrot4 {; draws most slices of Julibrot pix=pixel, u=real(pix), v=imag(pix), a=pi*real(p1*0.0055555555555556), b=pi*imag(p1*0.0055555555555556), g=pi*real(p2*0.0055555555555556), d=pi*imag(p2*0.0055555555555556), ca=cos(a), cb=cos(b), sb=sin(b), cg=cos(g), sg=sin(g), cd=cos(d), sd=sin(d), p=u*cg*cd-v*(ca*sb*sg*cd+ca*cb*sd), q=u*cg*sd+v*(ca*cb*cd-ca*sb*sg*sd), r=u*sg+v*ca*sb*cg, s=v*sin(a), c=p+flip(q)+p3, z=r+flip(s)+p4: z=z^(p5)+c |z|<=9 } ; END PARAMETER FILE========================================= ; ; ; ; _______________________________________________ ; Fractint mailing list ; Fractint@mailman.xmission.com ; http://mailman.xmission.com/cgi-bin/mailman/listinfo/fractint