// (c) Martin Schneider 2009
 
 
//color pal[] = { 0, 255 };
//color pal[] = { #ff0000, 255, #0000ff };
color pal[] = { 0, #00ff00, #009900 };
 
int n = 80;
int MAX = 100;
int c = 2;
 
float[][] v = new float[MAX][3];
float rot, ang, w, h, r;
 
 
void setup() {
  size(500,500);
  w = width;
  h = height;
  r = h - PI/2 * h*.9;
  noStroke();
  noCursor();
}
 
 
void draw() {
   
  background(255);
  translate(w/2, h/2, 0); 
  
  ang = (mouseX-h/2) / h * 4*PI;
  rot += (mouseY-Y/2) / w * .1;
    n = round(map(mouseY, 0, h,32,2));
 //   println(n);
   rotate(ang,rot);
   
//  rotateX(ang);
 // rotateZ(rot);
 // rotateX(-ang); 
 
  beginShape(QUAD_STRIP);
  for(int t=0, i=0; i<n; i++) {
    for(int j=0; j<n; j++) { 
     
      float a = map(i,0,n-1,0,PI);
      float b = map(j,0,n-1,0,TWO_PI);
      
      v[j][0] = r * sin(a) * cos(b);
      v[j][1] = r * sin(a) * sin(b);
      v[j][2] = r * cos(a);
      
      if(i>0) {
        int k = (j+1) % n;
        fill(pal[ t++ % pal.length], 128);
        vertex(v[j][0], v[j][1], v[j][2]);
        vertex(v[k][0], v[k][1], v[k][2]);
      }
    }
  }
  endShape();
  
}