sRings.pde

/**
 * Bounce. 
 * 
 * When the shape hits the edge of the window, it reverses its direction. 
 */
 
int rad = 60;        // Width of the shape
float xpos, ypos;    // Starting position of shape    
float FR = 30;

void setup() 
{
  //size(640*1.5,480*1.5);
  //size(1280, 960);
  size(960,720);
  noStroke();
  frameRate(FR);
  ellipseMode(RADIUS);
  // Set the starting position of the shape
  xpos = width/2;
  ypos = height/2;
}

void draw() 
{
    println("FrameCount= ",frameCount);
  background(102);
  strokeCap(SQUARE);
  //fill(255);
  // Draw the shape
  //ellipse(xpos, ypos, rad, rad);
  
  //stroke(255,0,0);
  stroke(0);
  strokeWeight(4);
  translate(xpos,ypos);
  //arc(0,0, 50, 50, 0, HALF_PI);
  noFill();
  
  int nArcs = 45;
  float diameter = height/2;
  float R= diameter* 0.8;
  float radiusStep = diameter / nArcs;  
  float phase = HALF_PI*4;
  
  for(int i = 0; i< nArcs+1 ; i++){
    if(i == 0) stroke (0,0,255);
    else stroke(0);
    R = diameter - i*radiusStep;
    
    
    float FC = frameCount;
    float t4C = FR * 3; //time4Cycle (seconds)
    float step = PI * ((FC%t4C) /t4C); ///This makes a [0..1..0]
    float TT = sin(step);              ///----^
    //println("Step= ", step, "TT ", TT);
    
    //float arc = HALF_PI*4 * (cos(step/nArcs*i)/2 + 0.5);
    //println("arc["+i+"]= "+(cos(TWO_PI/nArcs*i)/2 + 0.5));
    
    /////////////////////// (   )
    //arc(0, 0, R, R, PI, PI + arc * 0.99);
    float ark = HALF_PI*4* TT; 
    //println("ark["+i+"]= "+ark);
    stroke(255/nArcs * i);
    //arc(0, 0, R, R, PI, PI + ark);

    noFill();
    stroke(0);
    stroke(220,10,220);
    //noStroke();
    //phaseTotal * WF
    //FC =0;
    arc(0, 0, R, R, PI, PI + 2*PI * map(sin(PI*4/(nArcs) * ((i+1+0)%nArcs))   ,-1.0, 1.0, 0.0, 1.0)     );
    //println("DD["+i+"]= "+ (sin(2*PI/(nArcs) * ((i+1+FC)%nArcs))  ));
    
    //////-----------------------------
     float GG2 = (cos(PI*2/(nArcs) * (i+map(((FC%t4C)/t4C),0.0,1.0,0.0,(float)nArcs))%nArcs)  );
    float x2 = map( GG2 , -1.0, 1.0, 0.0, 1.0);    
    stroke(250);
    arc(0, 0, R, R, PI, PI + PI*2 * x2 );
    
    float GG = (sin(PI*6/(nArcs) * (i+map(((FC%t4C)/t4C),0.0,1.0,0.0,(float)nArcs))%nArcs)  );
    float x = map( GG , -1.0, 1.0, 0.0, 1.0);
    println("--"+i+"->"+ GG + " |"+ x);
    
    stroke(0);
    arc(0, 0, R, R, PI, PI + PI*2 * x );
    

  }

}