aho_extra_polygon.pde

 
// How to draw polygons

void setup() {
  size(400,400);
  background(200);
  ellipseMode(CENTER_DIAMETER);
  framerate(10);
}

void loop() {
  background(200);

// Careful with polygons: All vertices must
// be defined in clockwise OR counter-clockwise 
// order to fill properly.

  beginShape(POLYGON);
  vertex(100,50);
  vertex(250,50);
  vertex(300,180);
  vertex(100,350);
  vertex(200,200);
  vertex(100,200);
  vertex(200,100);  
  vertex(mouseX,mouseY);
  endShape();
}