NatureOfCode2/ang-rot6.html at master · brlebtag/NatureOfCode2 · GitHub

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<html>
    <head>
        <title>Angles and Rotation 6 - Graphing Sine Wave</title>
        <script src="https://cdn.jsdelivr.net/npm/p5@1.5.0/lib/p5.min.js"></script>
        <script>

        var angle = 0;
        var angleVelocity = 0;
        var radius = 16;
        var angles = [];
        var angleVelocities = [];

        function setup() {
            createCanvas(800, 600);
            let total = floor(width / (radius * 2));
            for (let i = 0; i < total; i++) {
                angles[i] = 0;
                angleVelocities[i] = 0.01 + i / 100;
            }
        }

        function draw() {
            background(0);
            translate(width / 2, height /2);
            fill(252, 238, 33);
            stroke(252, 238, 33);
            // let r = map(sin(angle), -1, 1, 0, 200);
            for (let i = 0; i < angles.length; i++) {
                let y = map(sin(angles[i]), -1, 1, -200, 200);
                stroke(255);
                let x = map(i, 0, angles.length, - width / 2, width / 2);
                line(x, 0, x, y);
                angles[i] += angleVelocities[i];
                circle(x, y, 32);
            }
        }
        </script>
    </head>
</html>