Re: 4D Visualisierung

On 9/15/2024 1:54 PM, Chris M. Thomasson wrote:
[...]

Actually, here is some of my test code for one of my experimental stacked mandelbulbs. The code generates ppm's images as its final image stack for any volumetric renderer to get a hold of them. Can you run the code?
 https://pastebin.com/raw/07TWQQYF
 https://groups.google.com/g/comp.lang.c/c/ve7UtNFAYH0

Here is the most relevant function:
/* The Power Stack Mandelbulb
___________________________________*/
void
ct_iterate_mbulb_pixel(
     struct ct_plot* const plot,
     struct ct_vec3 const z0,
     struct ct_vec3 const c0,
     double power,
     long x,
     long y,
     unsigned int n
){
     struct ct_vec3 zs = z0;
     struct ct_vec3 cs = c0;
     for (unsigned long i = 0; i < n; ++i)
     {
         double r = ct_vev3_length(zs);
         double rpower = pow(r, power);
         double angle0 = atan2(zs.z, sqrt(zs.x * zs.x + zs.y * zs.y));
         double angle1 = atan2(zs.y, zs.x);
         struct ct_vec3 znew;
         znew.x = rpower * cos(power * angle1) * cos(power * angle0);
         znew.y = rpower * sin(power * angle1) * cos(power * angle0);
         znew.z = rpower * sin(power * angle0);
         zs = ct_vec3_add(znew, cs);
         if (r > 2.0)
         {
             return;
         }
     }
     struct ct_rgb rgb = { 0, 255, 0 };
     ct_plot_pixel(plot, x, y, &rgb);
}