vectron example

#include "octane-oslintrin.h"
shader OslGeometry(
    int Iterations = 10,
    float Power = 2.0,
    float Bailout = 20,
    output _sdf c = _SDFDEF)
{
    vector pos = P;

    float power = Power;

    float w = fmod(_wipes(), 300.0) / 300.0;

    power = w * 5 + 5.0;

    vector z = P;
    float dr = 1.0;
    float r = 0.0;
    for (int i = 0; i < Iterations ; i++) {
        r = length(z);
        if (r>Bailout) break;

        // convert to polar coordinates
        float theta = acos(z[2]/r);
        float phi = atan2(z[1],z[0]);
        dr =  pow( r, power-1.0)*power*dr + 1.0;

        // scale and rotate the point
        float zr = pow( r,power);
        theta = theta*power;
        phi = phi*power;

        // convert back to cartesian coordinates
        z = zr*vector(sin(theta)*cos(phi), sin(phi)*sin(theta), cos(theta));
        z+=pos;
    }
    c.dist = 0.5*log(r)*r/dr;
}