JSFiddle - React, Tailwind, and code Playground

by PhilQ

HTML

<script src="http://threejs.org/build/three.min.js"></script>
<script src="http://threejs.org/examples/js/controls/OrbitControls.js"></script>
<script id="vertexShader" type="x-shader/x-vertex">
    uniform float width;
    uniform float height;
    varying float x;
    varying float y;
    void main() {
        vec4 v = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
        x = v.x;
        y = v.y;
        gl_Position = v;
    }
</script>
<script id="fragmentShader" type="x-shader/x-vertex">
    varying float x;
    varying float y;
    void main() {
        gl_FragColor = vec4( 0.5 * x ,  0.5 * y + 0.5, 0.0, 1.0 );
    }
</script>

JavaScript

// experimenting with shaders

var container, renderer, scene, camera, controls, plane, customUniforms;

init();
animate();

function init() {

    // renderer
    renderer = new THREE.WebGLRenderer({
        antialias: false
    });
    renderer.setSize(window.innerWidth, window.innerHeight);
    renderer.setClearColor(0xccccff);
    container = document.createElement('div');
    document.body.appendChild(container);
    container.appendChild(renderer.domElement);

    // scene
    scene = new THREE.Scene();

    // camera
    camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1, 10000);
    camera.position.set(0, 200, 800);
    camera.lookAt(scene.position);

    // (camera) controls
    // mouse controls: left button to rotate, 
    //    mouse wheel to zoom, right button to pan
    controls = new THREE.OrbitControls(camera, renderer.domElement);

    customUniforms = {
        width: {
            type: "f",
            value: window.innerWidth
        },
        height: {
            type: "f",
            value: window.innerHeight
        }
    };

    var planeMaterial = new THREE.ShaderMaterial({
        uniforms: customUniforms,
        vertexShader: document.getElementById('vertexShader').textContent,
        fragmentShader: document.getElementById('fragmentShader').textContent
    });

    var planeGeometry = new THREE.PlaneGeometry(500, 500, 10, 10);

    plane = new THREE.Mesh(planeGeometry, planeMaterial);
    scene.add(plane);

    // events
    window.addEventListener('resize', onWindowResize, false);

}

function onWindowResize(event) {
    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();
    renderer.setSize(window.innerWidth, window.innerHeight);
}

function animate() {
    controls.update();
    renderer.render(scene, camera);
    requestAnimationFrame(animate);
}