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106 lines
2.1 KiB
JavaScript
106 lines
2.1 KiB
JavaScript
import * as THREE from 'https://cdn.skypack.dev/three@0.136.0/build/three.module.js';
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export const state = {
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width: 300, // canvas default
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height: 150, // canvas default
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};
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export function init( data ) { /* eslint-disable-line no-unused-vars */
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const { canvas } = data;
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const renderer = new THREE.WebGLRenderer( { antialias: true, canvas } );
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state.width = canvas.width;
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state.height = canvas.height;
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const fov = 75;
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const aspect = 2; // the canvas default
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const near = 0.1;
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const far = 100;
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const camera = new THREE.PerspectiveCamera( fov, aspect, near, far );
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camera.position.z = 4;
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const scene = new THREE.Scene();
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{
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const color = 0xFFFFFF;
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const intensity = 1;
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const light = new THREE.DirectionalLight( color, intensity );
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light.position.set( - 1, 2, 4 );
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scene.add( light );
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}
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const boxWidth = 1;
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const boxHeight = 1;
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const boxDepth = 1;
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const geometry = new THREE.BoxGeometry( boxWidth, boxHeight, boxDepth );
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function makeInstance( geometry, color, x ) {
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const material = new THREE.MeshPhongMaterial( {
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color,
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} );
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const cube = new THREE.Mesh( geometry, material );
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scene.add( cube );
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cube.position.x = x;
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return cube;
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}
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const cubes = [
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makeInstance( geometry, 0x44aa88, 0 ),
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makeInstance( geometry, 0x8844aa, - 2 ),
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makeInstance( geometry, 0xaa8844, 2 ),
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];
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function resizeRendererToDisplaySize( renderer ) {
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const canvas = renderer.domElement;
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const width = state.width;
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const height = state.height;
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const needResize = canvas.width !== width || canvas.height !== height;
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if ( needResize ) {
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renderer.setSize( width, height, false );
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}
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return needResize;
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}
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function render( time ) {
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time *= 0.001;
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if ( resizeRendererToDisplaySize( renderer ) ) {
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camera.aspect = state.width / state.height;
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camera.updateProjectionMatrix();
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}
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cubes.forEach( ( cube, ndx ) => {
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const speed = 1 + ndx * .1;
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const rot = time * speed;
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cube.rotation.x = rot;
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cube.rotation.y = rot;
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} );
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renderer.render( scene, camera );
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requestAnimationFrame( render );
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}
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requestAnimationFrame( render );
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}
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