NatureOfCode2/auto-agent5.html at master · brlebtag/NatureOfCode2 · GitHub

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<html>
    <head>
        <title>Autonomous Agent 5 - Vector Dot Product</title>
        <script src="https://cdn.jsdelivr.net/npm/p5@1.5.0/lib/p5.min.js"></script>
        <script>
            let a, b;

            function setup() {
                createCanvas(800, 600);
                a = createVector(100, -60);
                b = createVector(200, 60);
            }

            function scalarProjection(a, b) {
                return a.dot(b.copy().normalize());
            }

            function vectorProjection(a, b) {
                let bCopy = b.copy().normalize();
                let sp = a.dot(bCopy);
                bCopy.mult(sp);
                return bCopy;
            }


            function draw() {
                background(0);
                strokeWeight(8);
                stroke(255);
                let pos = createVector(100, 200);

                line(pos.x, pos.y, pos.x + a.x, pos.y + a.y);
                line(pos.x, pos.y, pos.x + b.x, pos.y + b.y);

                let vetProj = vectorProjection(a, b);

                strokeWeight(8);
                stroke(0, 0, 255);
                line(pos.x, pos.y, pos.x + vetProj.x, pos.y + vetProj.y);

                strokeWeight(8);
                fill(255);
                stroke(255);
                line(pos.x + a.x, pos.y + a.y, pos.x + vetProj.x, pos.y + vetProj.y);

                fill(0, 255, 0);
                noStroke();
                circle(pos.x + a.x, pos.y + a.y, 16);

                fill(255, 0, 0);
                noStroke();
                circle(pos.x + vetProj.x, pos.y + vetProj.y, 16);

                fill(0, 255, 0);
                noStroke();
                circle(pos.x, pos.y, 16);
            }
        </script>
    </head>
</html>