Color Gradients 2-9

clrGrad_2_9.pde

size(512, 512);
background(0xffffffff);
noStroke();
colorMode(HSB, 359, 99, 99);
ellipseMode(RADIUS);
textAlign(CENTER, CENTER);

int count = 16;

float centerX = width * 0.5; 
float centerY = height * 0.5;
float radius = 42; 
float dist = min(height, width) * 0.5 - radius; 
float angle;
float hue;
float x;
float y;
float radToDeg = 360 / TWO_PI;
float countToRad = TWO_PI / float(count);

String label = "";

for (int i = 0; i < count; ++i) {
  angle = i * countToRad;
  hue = angle * radToDeg;
  x = centerX + cos(angle) * dist;
  y = centerY + sin(angle) * dist;
  label = ceil(hue) + "\u00b0";

  fill(color(hue, 99, 99));
  ellipse(x, y, radius, radius);

  fill(0xff000000);
  text(label, x, y);
  fill(0xffffffff);
  text(label, x + 1, y - 1);
}