A basic THREE.js scene with shadows, lights, camera rotation, and frame rate stats.
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June 18, 2019 02:08
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Sphere
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| license: gpl-3.0 |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/69/three.js"></script> | |
| <script src="https://unpkg.com/three@0.104.0/examples/js/libs/stats.min.js"></script> | |
| <script src="https://unpkg.com/geometric@1.1.1/build/geometric.min.js"></script> | |
| <style> | |
| body { | |
| margin: 0; | |
| overflow: hidden; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="stats"></div> | |
| <div id="scene"></div> | |
| <script> | |
| const stats = (_ => { | |
| const stats = new Stats(); | |
| stats.setMode(0); | |
| stats.domElement.style.position = "absolute"; | |
| stats.domElement.style.left = "0px"; | |
| stats.domElement.style.top = "0px"; | |
| document.getElementById("stats").appendChild(stats.domElement); | |
| return stats; | |
| })(); | |
| const scene = new THREE.Scene(); | |
| const camera = (_ => { | |
| const camera = new THREE.PerspectiveCamera(45, innerWidth / innerHeight, 0.1, 1000); | |
| camera.position.set(-40, 20, -20); | |
| camera.lookAt(scene.position); | |
| return camera; | |
| })(); | |
| const renderer = (_ => { | |
| const renderer = new THREE.WebGLRenderer(); | |
| renderer.setClearColor("#eee"); | |
| renderer.setSize(innerWidth, innerHeight); | |
| renderer.shadowMapEnabled = true; | |
| document.getElementById("scene").appendChild(renderer.domElement); | |
| return renderer; | |
| })(); | |
| const plane = (_ => { | |
| const geo = new THREE.PlaneBufferGeometry(30, 30); | |
| const mat = new THREE.MeshLambertMaterial({ color: "#fff" }); | |
| const plane = new THREE.Mesh(geo, mat); | |
| plane.rotation.x = -.5 * Math.PI; | |
| plane.receiveShadow = true; | |
| scene.add(plane); | |
| return plane; | |
| })(); | |
| const sphere = (_ => { | |
| const geo = new THREE.SphereGeometry(4, 32, 32); | |
| const mat = new THREE.MeshPhongMaterial({ color: "steelblue"}); | |
| const sphere = new THREE.Mesh(geo, mat); | |
| sphere.position.y = 4; | |
| sphere.castShadow = true; | |
| scene.add(sphere); | |
| return sphere; | |
| })(); | |
| const spotlight = (_ => { | |
| const spotlight = new THREE.SpotLight("#fff"); | |
| spotlight.position.set(-50, 50, -50); | |
| spotlight.castShadow = true; | |
| scene.add(spotlight); | |
| return spotlight; | |
| })(); | |
| function render() { | |
| requestAnimationFrame(render); | |
| stats.update(); | |
| [camera.position.x, camera.position.z] = geometric.pointRotate([camera.position.x, camera.position.z], 0.5); | |
| camera.lookAt(scene.position); | |
| renderer.render(scene, camera); | |
| } | |
| render(); | |
| function resize(){ | |
| camera.aspect = innerWidth / innerHeight; | |
| camera.updateProjectionMatrix(); | |
| renderer.setSize(innerWidth, innerHeight); | |
| } | |
| onresize = resize; | |
| </script> | |
| </body> | |
| </html> |
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