three.js ~ example ~ Mr.doob

2012-01-05 ~

JavaScript

var camera, scene, renderer, geometry, material, mesh1, mesh2;

init();
animate();

function init() {

    scene = new THREE.Scene();

    camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 1, 10000);
    camera.position.z = 500;
    scene.add(camera);

    geometry = new THREE.CubeGeometry(200, 200, 200);
    material = new THREE.MeshNormalMaterial();

    mesh1 = new THREE.Mesh(geometry, material);
    mesh1.position.x = 150;
    scene.add(mesh1);
    mesh2 = new THREE.Mesh(geometry, material);
    mesh2.position.x = -150;
    scene.add(mesh2);

    renderer = new THREE.CanvasRenderer();
    renderer.setSize(window.innerWidth, window.innerHeight);

    document.body.appendChild(renderer.domElement);
    document.addEventListener('wheel', zoom);

}

function zoom(e) {
  camera.position.z *= Math.pow(1.001, e.deltaY);
}

function animate() {

    requestAnimationFrame(animate);
    render();

}

function render() {

    mesh1.rotation.x += 0.01;
    mesh1.rotation.y += 0.02;
    mesh2.rotation.x += 0.01;
    mesh2.rotation.y += 0.02;
    
    let scaleConstant = camera.position.z / 500;
    mesh1.scale.x = scaleConstant;
    mesh1.scale.y = scaleConstant;
    mesh1.scale.z = scaleConstant;
    
    let offsetConstant = camera.position.z * 150 / 500;
    mesh1.position.x = offsetConstant;

    renderer.render(scene, camera);

}