binarywaveforms/index.html at main · bjvickers/binarywaveforms · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Binary Waveforms</title>
    <style>
        body {
            margin: 0;
            background-color: #05050a;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            overflow: hidden;
            font-family: sans-serif;
        }
        #canvas3d {
            width: 100vw;
            height: 100vh;
        }
    </style>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
</head>
<body>

<div id="canvas3d"></div>

<script>
    // --- 1. Setup Three.js Scene, Camera, and Renderer ---
    const container = document.getElementById('canvas3d');
    const scene = new THREE.Scene();
    // Lighter fog so the brighter particles aren't dimmed in the distance
    scene.fog = new THREE.FogExp2(0x05050a, 0.008);

    const camera = new THREE.PerspectiveCamera(60, window.innerWidth / window.innerHeight, 0.1, 1000);
    camera.position.set(0, 50, 100);
    camera.lookAt(0, 0, 0);

    const renderer = new THREE.WebGLRenderer({ antialias: true });
    renderer.setSize(window.innerWidth, window.innerHeight);
    renderer.setPixelRatio(window.devicePixelRatio);
    // Boost overall output brightness/contrast
    if (renderer.toneMapping !== undefined) {
        renderer.toneMapping = THREE.ACESFilmicToneMapping;
        renderer.toneMappingExposure = 1.6;
    }
    container.appendChild(renderer.domElement);

    // --- 2. Create Particle Shell ---
    const particleCount = 16000; // a bit denser for more presence
    const geometry = new THREE.BufferGeometry();
    const positions = new Float32Array(particleCount * 3);
    const colors = new Float32Array(particleCount * 3);
    const particleRadii = new Float32Array(particleCount);

    const maxRadius = 40;

    for (let i = 0; i < particleCount; i++) {
        const u = Math.random();
        const v = Math.random();
        const theta = u * 2.0 * Math.PI;
        const phi = Math.acos(2.0 * v - 1.0);

        const r = Math.random() * maxRadius;
        particleRadii[i] = r;

        const x = r * Math.sin(phi) * Math.cos(theta);
        const y = r * Math.sin(phi) * Math.sin(theta);
        const z = r * Math.cos(phi);

        positions[i * 3] = x;
        positions[i * 3 + 1] = y;
        positions[i * 3 + 2] = z;

        colors[i * 3] = 0;
        colors[i * 3 + 1] = 0;
        colors[i * 3 + 2] = 0;
    }

    geometry.setAttribute('position', new THREE.BufferAttribute(positions, 3));
    geometry.setAttribute('color', new THREE.BufferAttribute(colors, 3));

    const material = new THREE.PointsMaterial({
        size: 1.3,            // smaller points, still bright via additive blending
        vertexColors: true,
        transparent: true,
        opacity: 1.0,          // full opacity, let additive blending do the glow work
        blending: THREE.AdditiveBlending,
        depthWrite: false
    });

    const particleSystem = new THREE.Points(geometry, material);
    scene.add(particleSystem);

    const boundaryGeo = new THREE.SphereGeometry(maxRadius, 16, 16);
    const boundaryMat = new THREE.MeshBasicMaterial({
        color: 0xffffff,
        wireframe: true,
        transparent: true,
        opacity: 0.06          // slightly more visible shell
    });
    const boundaryMesh = new THREE.Mesh(boundaryGeo, boundaryMat);
    scene.add(boundaryMesh);

    // --- 3. Animation and Wave Physics ---
    let currentRadius = 0;
    const waveSpeed = 0.3;     // a touch faster — more energetic pulse
    const waveWidth = 4.5;     // slightly wider wavefront
    const intensityBoost = 1.6; // overdrive multiplier for brightness/power

    function animate() {
        requestAnimationFrame(animate);

        currentRadius += waveSpeed;
        if (currentRadius > maxRadius + waveWidth) {
            currentRadius = 0;
        }

        const colorAttribute = geometry.attributes.color;

        for (let i = 0; i < particleCount; i++) {
            const r = particleRadii[i];

            // 1. Outward Wave (Cyan)
            let distOut = Math.abs(r - currentRadius);
            let ampOut = 0;
            if (distOut < waveWidth) {
                ampOut = Math.cos((distOut / waveWidth) * Math.PI) * 0.5 + 0.5;
            }

            // 2. Inward Wave (Red)
            let inwardWaveFront = maxRadius - currentRadius;
            let distIn = Math.abs(r - inwardWaveFront);
            let ampIn = 0;
            if (distIn < waveWidth) {
                ampIn = -(Math.cos((distIn / waveWidth) * Math.PI) * 0.5 + 0.5);
            }

            // 3. Destructive Combination
            let netAmplitude = ampOut + ampIn;
            // Overdrive: push intensity above 1.0 — additive blending lets
            // overlapping/bright particles bloom hotter without changing hue
            let boosted = netAmplitude * intensityBoost;

            if (boosted > 0.01) {
                colorAttribute.setXYZ(i, 0, boosted, boosted);
            } else if (boosted < -0.01) {
                colorAttribute.setXYZ(i, Math.abs(boosted), 0, 0);
            } else {
                // faint ambient glow instead of pure black, so the sphere
                // never goes fully dark between pulses
                colorAttribute.setXYZ(i, 0.02, 0.02, 0.03);
            }
        }

        colorAttribute.needsUpdate = true;

        particleSystem.rotation.y += 0.0028;
        particleSystem.rotation.x += 0.0014;
        boundaryMesh.rotation.y += 0.0028;
        boundaryMesh.rotation.x += 0.0014;

        renderer.render(scene, camera);
    }

    window.addEventListener('resize', onWindowResize, false);
    function onWindowResize() {
        camera.aspect = window.innerWidth / window.innerHeight;
        camera.updateProjectionMatrix();
        renderer.setSize(window.innerWidth, window.innerHeight);
    }

    animate();
</script>

</body>
</html>