Exercise 36

Now let’s apply the same approach to a circle:

size(500, 300);
background(255);
strokeWeight(5);
smooth();

float radius = 100;
int centX = 250;
int centY = 150;
stroke(0, 30);
noFill();
ellipse(centX, centY, radius*2, radius*2);
stroke(20, 50, 70);
float x, y;
float lastx = -999;
float lasty = -999;

for (float ang = 0; ang <= 360; ang += 5) {
  float rad = radians(ang);
  x = centX + (radius * cos(rad));
  y = centY + (radius * sin(rad));
  point(x, y);
}