POV-Ray : Newsgroups : povray.text.scene-files : My favourite isosurface (see p.b.i. for image) : Re: My favourite isosurface (see p.b.i. for image) Server Time
21 Jun 2024 01:09:09 EDT (-0400)
  Re: My favourite isosurface (see p.b.i. for image)  
From: Dennis Miller
Date: 20 Nov 2003 17:51:49
Message: <3fbd4585$1@news.povray.org>
Tor, I get a completely blank (blue) screen with this (though it renders
really fast!  :-). I did copy all the other settings and code from the
previous version (camera, sky, etc)...

Does it look right to you?
D.

"Tor Olav Kristensen" <tor_olav_kCURLYAhotmail.com> wrote in message
news:3fbc3970@news.povray.org...
> "Alex Kluchikov" <klk### [at] ukrnet> wrote in
> news:web.3fbbe555cd7b5c811235fd70@news.povray.org:
>
> >
> >  Here is the source.
> ...
>
> Alex, if you write the code for your isosurface
> like I have done below, then the image will
> render much faster.
>
> (On my Athlon XP2400+ PC a 512x384 AA0.3 render
> now takes 3m08s, while it earlier took 16m20s.)
>
> Btw.:
> Thank you for showing how you created the texture
> and "environment sphere" for your "cuboids" image
> in p.b.i.
>
>
> Tor Olav
>
>
> // ===== 1 ======= 2 ======= 3 ======= 4 ======= 5 ======= 6 ======= 7
>
> #include "functions.inc"  // For f_r() and f_sphere()
>
> #declare TwoPi = 2*pi;
> #declare TT = 8; // Number of "Turns"
> #declare M1 = TT/3;
> #declare M2 = 5; // Number of "Blobs"
>
> #declare Rmaj = 1.50;
> #declare Rmin = 0.25;
>
> #declare dAngle = TwoPi/3;
>
> #declare a0 = Rmin*cos(0*dAngle);
> #declare b0 = Rmin*sin(0*dAngle);
>
> #declare a1 = Rmin*cos(1*dAngle);
> #declare b1 = Rmin*sin(1*dAngle);
>
> #declare a2 = Rmin*cos(2*dAngle);
> #declare b2 = Rmin*sin(2*dAngle);
>
> #declare TempFn0 =
>   function(A, B) {
>     pow(f_r(A + a0, 0, B + b0), 1/32)
>    +pow(f_r(A + a1, 0, B + b1), 1/32)
>    +pow(f_r(A + a2, 0, B + b2), 1/32)
>   }
>
> #declare TempFn1 =
>   function(XZ, YY, Cos, Sin, RF) {
>     0.330*TempFn0(+XZ*Cos +YY*Sin, -XZ*Sin +YY*Cos)
>    +0.010*sin(RF)
>    -0.945
>   }
>
> #declare TempFn2 =
>   function(XZ, YY, Phi) {
>     TempFn1(XZ, YY, cos(Phi*M1), sin(Phi*M1), Phi*M2)
>   }
>
> #declare Heart =
>   isosurface {
>     function { TempFn2(f_sphere(x, 0, z, Rmaj), y, 90 - atan2(x, z)) }
>     accuracy 2E-4
>     max_gradient 0.75
>     contained_by {
>       box {
>        -<Rmaj + Rmin, Rmin, Rmaj + Rmin> - <1, 1, 1>*0.12,
>         <Rmaj + Rmin, Rmin, Rmaj + Rmin> + <1, 1, 1>*0.12
>       }
>     }
>   }
>
> // ===== 1 ======= 2 ======= 3 ======= 4 ======= 5 ======= 6 ======= 7


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