ccapture.js-examples/example_three.html at main · andr-ew/ccapture.js-examples · GitHub

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<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <title>three.js animation example</title>
        <style>
            body {
                margin: 0;
            }
            #record {
                position: fixed;
                left: 2rem;
                bottom: 2rem;
            }
        </style>
    </head>
    <body>
        <button id="record" type="button" onclick="record()">record</button>
        <!-- import ccapture.js (v1.1.0) from a CDN -->
        <script src="https://unpkg.com/ccapture.js@1.1.0/build/CCapture.all.min.js"></script>
        <script type="module">
            //import the three.js library (v0.137.5) & example script from a CDN
            //
            //  note: it seems that not all the example files can be accessed from CDNs. an alternative is to download the three.js source & include the examples folder in your project manually or use npm + browserfy/etc
            //
            import * as THREE from 'https://unpkg.com/three@0.137.5?module';
            import { OrbitControls } from 'https://unpkg.com/three@0.137.5/examples/jsm/controls/OrbitControls.js?module';

            let start, capturer, recording, width, height;

            //some THREE.js "boilerplate"

            const scene = new THREE.Scene();
            scene.background = null;

            const camera = new THREE.PerspectiveCamera(
                75,
                window.innerWidth / window.innerHeight,
                0.1,
                1000
            );

            const renderer = new THREE.WebGLRenderer({
                preserveDrawingBuffer: true,
                alpha: true,
            });
            renderer.setSize(window.innerWidth, window.innerHeight);
            renderer.setPixelRatio(window.devicePixelRatio);
            document.body.appendChild(renderer.domElement);

            //setting the background to blue, nice for chromakeys
            renderer.setClearColor(0x0000ff, 1);

            function resize() {
                let w, h;
                if (recording) {
                    w = width;
                    h = height;
                } else {
                    w = window.innerWidth;
                    h = window.innerHeight;
                }

                camera.aspect = w / h;
                camera.updateProjectionMatrix();

                renderer.setSize(w, h);
            }
            window.addEventListener('resize', resize);

            const orbit = new OrbitControls(camera, renderer.domElement);

            //--------------------- SET UP YOUR SCENE HERE ---------------------

            const ambientLight = new THREE.AmbientLight(0x000000);
            scene.add(ambientLight);
            const lights = [];
            lights[0] = new THREE.PointLight(0xffffff, 0.65, 0);
            lights[1] = new THREE.PointLight(0xffffff, 0.65, 0);
            lights[2] = new THREE.PointLight(0xffffff, 0.65, 0);
            lights[0].position.set(0, 400, 0);
            lights[1].position.set(200, 400, 400);
            lights[2].position.set(-200, -400, -200);
            scene.add(lights[0]);
            scene.add(lights[1]);
            scene.add(lights[2]);

            const geometry = new THREE.BoxGeometry();
            const material = new THREE.MeshStandardMaterial({
                color: 0xffffff,
            });
            const cube = new THREE.Mesh(geometry, material);
            scene.add(cube);

            camera.position.z = 5;
            camera.position.y = 5;
            camera.lookAt(0, 0, 0);

            //-------------------------------------------------------------------

            //animation duration (seconds)
            const duration = 5;

            function animate() {
                requestAnimationFrame(animate);

                const now = (performance || Date).now();
                if (start === undefined) start = now;
                const elapsed = now - start;

                //t = loop position in the range 0 - 1
                const t = (elapsed % (duration * 1000)) / (duration * 1000);

                //--------------------- ANIMATE YOUR SCENE HERE ---------------------

                //use the value of t to drive your animation
                //DO NOT incriment values every frame, i.e. cube.rotation.y += 0.01
                cube.rotation.y = 2 * Math.PI * t;

                //-------------------------------------------------------------------

                renderer.render(scene, camera);
                if (capturer) capturer.capture(renderer.domElement);
            }
            animate();

            //set up ccapture.js with webm video format
            capturer = new CCapture({
                format: 'webm',
                framerate: 60,
                timeLimit: duration, //record exactly one loop
                display: true,
            });

            //set video dimentions
            width = 1920;
            height = 1080;

            //record using ccapture.js when the record button is pressed
            window.record = function () {
                console.log('begin recording');

                start = undefined; //reset loop timing
                recording = true;
                resize(); //resize scene to video dimentions
                capturer.start();
            };
        </script>
    </body>
</html>