NatureOfCode2/ang-rot4.3.html at master · brlebtag/NatureOfCode2 · GitHub

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<html>
    <head>
        <title>Angles and Rotation 4.3 - Polar Coordinates </title>
        <script src="https://cdn.jsdelivr.net/npm/p5@1.5.0/lib/p5.min.js"></script>
        <script>

        var angle = 0;
        var r = 150;

        function setup() {
            createCanvas(800, 600);
        }

        function draw() {
            background(0);
            translate(width / 2, height /2);
            stroke(255);
            strokeWeight(4);
            noFill();
            // circle(0, 0, r * 2);
            beginShape();

            let increment = map(mouseX, 0, width, PI, 0.01);

            for (let angle = 0; angle < TWO_PI; angle += increment) {
                let x = r * cos(angle);
                let y = r * sin(angle);
                vertex(x, y);
            }

            endShape(CLOSE);
        }
        </script>
    </head>
</html>