Regular Polygon
What is your favorite? Pentagon? Hexagon? Heptagon? No? What about the icosagon? The polygon() function created for this example is capable of drawing any regular polygon. Try placing different numbers into the polygon() function calls within draw() to explore.
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function setup() {
createCanvas(720, 400);
}
function draw() {
background(102);
push();
translate(width * 0.2, height * 0.5);
rotate(frameCount / 200.0);
polygon(0, 0, 82, 3);
pop();
push();
translate(width * 0.5, height * 0.5);
rotate(frameCount / 50.0);
polygon(0, 0, 80, 20);
pop();
push();
translate(width * 0.8, height * 0.5);
rotate(frameCount / -100.0);
polygon(0, 0, 70, 7);
pop();
}
function polygon(x, y, radius, npoints) {
let angle = TWO_PI / npoints;
beginShape();
for (let a = 0; a < TWO_PI; a += angle) {
let sx = x + cos(a) * radius;
let sy = y + sin(a) * radius;
vertex(sx, sy);
}
endShape(CLOSE);
}
