Hi there
I'm new here but I use- or rather try to use processing since a while now.

I'm reworking Buddhabrot - a processing program of J. Tarbell, who based his Version on an even older implementation by Paul Bourke.
Buddhabrot is a modified way to look at the Mandelbrot-set, as discovered and described by Melinda Green.


After several problems ( a) I can't yet post links and b) the 6000 character limit), I'll now post the source in several sections. I hope you like it

//  MAIN ----------------------------------------------------------------

int sgn(float value) {            //if signus is needed sgn(x)=x/abs(x) = 1, 0 or -1
 if (value < 0) {return -1;}
 if (value > 0) {return 1;}
 return 0;
}

float cosh(float value1) {
 return 0.5*(exp(value1)+exp(-value1));
}

float sinh(float value2) {
 return 0.5*(exp(value2)-exp(-value2));
}

float arg(float axis1, float axis2) {
 if (axis2==0) {return PI;}
 else {return -atan(axis1/axis2)+PI*sgn(axis2)*0.5;}
}

float spharg(float axisa, float axisb, float axisc) {
 return acos(axisc/sqrt(sq(axisa)+sq(axisb)+sq(axisc)));
}

void setup() {
 // set up drawing area
 size(dimy,dimx,P3D);
}

void draw() {
 plotPlots();
 time++;
 if (time%1==0) { //every second
   findMaxExposure();
   renderBrot();
 }
}



void plotPlots() {

 // iterate through some plots
 for (int n=0;n<plots;n++) {
   // Choose a random point in same range
   x = random(-2.0,1.0);
   y = random(-1.5,1.5);
   x0 = random(-2.0,2.0);
   y0 = random(-2.0,2.0);
   if (iterate(x,y,false)) {
     iterate(x,y,true);
     exposures++;
   }
 }
}

void renderBrot() {
 colorMode(RGB,1.0);
 // draw to screen
 for (int i=0;i<dimx;i++) {
   for (int j=0;j<dimy;j++) {
     float ramp = brt * exposure[i*dimy+j] / maxexposure;
     // blow out ultra bright regions
     if (ramp > 1)  {
       ramp = 1;
     }
     //different shading formulae
     //color c = color(pow(ramp,0.45454545454545454545),pow(ramp,0.45454545454545454545),pow(ramp
,0.45454545454545454545)); //default greyscale
     color c = color(pow(ramp,0.413223140495867768595041322314049586776859504132231404958677685
950413223140495867769),pow(ramp,0.45454545454545454545),pow(ramp,0.3787878787878
78787878787878787878787878787878787878787878787878787878787878787878788)); //purple touch
     //color c = color(pow(sin(ramp*1.57079632679489661923132169163975144209858469968755291048747
2296153908203143104499314),0.4),pow(ramp,0.75),pow(ramp,2.5)); // sunset
     //color c = color(pow(sin(ramp*1.57079632679489661923132169163975144209858469968755291048747
2296153908203143104499314),0.45454545455),pow(ramp,17/11.0),pow(ramp,109/55.0));
// "love"
     set(j,i,c);
   }
 }
}

// Buddhabrot
//http://www.superliminal.com/fractals/bbrot/bbrot.htm
// j.tarbell   January, 2004
// m.faderbauer June, 2009
//_____________________________________________________________
//Changelog:
//_____________________________________________________________
//simplifyed code, cutting out unnessecary stuff
//changed code to allow variable output dimensions
//added shift to render different regions
//added magnify to zoom (not the best solution)
//switched RGB from 8bit to normalized float (0-1)
//added gamma to gradient &
//added gradient variations
// -> made overboost of brightness variable, as
// better gradients don't need cut-offs of info
//
//added different formulasets, doing Buddhabrot-
// like renders of different IFSs
//added sgn() [returns the signus of a number:]
//            [<0 -> -1; ==0 -> 0; >0 -> 1    ]
//added cosh() and sinh() - the hyperbolic sine and cosine
//added arg() and spharg() - argument on a circle or a sphere
//______________________________________________________________
//ToDo:
//save the file without poor screenshot and save
//possibility to directly mix a three channeled
// picture, based on bailout values (rendering
// once for a picture like Melinda Green's
// original colouring version, rather than
// trice, once for each channel)
//allowing true complex numbers
//allowing also the "buddhagram"
// ( http://www.superliminal.com/fractals/bgram/ZrZiOut.htm )
//rotating the set (4D rotation)
//optimizing
//UI & GUI
//  with preset formulae to switch the image and the colours
//  for instance, the general form of Mset^5
//  az^5+bz^4+cz^3+dz^2+ez+f
//  and a possibility to add ANY other formula - maybe just a
//  little script window, where no programming skills are needed.
//gimmick
//  instead of current hardcoded navigation, a preview window
//  to zoom in and out, rotate as wanted and also pan around.

These are really beautiful!