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168 lines
4.4 KiB
168 lines
4.4 KiB
<!-- Licensed under a BSD license. See license.html for license -->
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
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<title>Three.js - Transparency - AlphaTest</title>
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<style>
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html, body {
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height: 100%;
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margin: 0;
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}
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#c {
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width: 100%;
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height: 100%;
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display: block;
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}
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</style>
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</head>
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<body>
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<canvas id="c"></canvas>
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</body>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../../build/three.module.js",
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"three/addons/": "../../examples/jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import {OrbitControls} from 'three/addons/controls/OrbitControls.js';
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import {GUI} from 'three/addons/libs/lil-gui.module.min.js';
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function main() {
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const canvas = document.querySelector('#c');
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const renderer = new THREE.WebGLRenderer({canvas});
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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 = 25;
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const camera = new THREE.PerspectiveCamera(fov, aspect, near, far);
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camera.position.set(0.5, 1, 0.5);
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const controls = new OrbitControls(camera, canvas);
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controls.target.set(0, 0, 0);
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controls.update();
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const scene = new THREE.Scene();
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scene.background = new THREE.Color('white');
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function addLight(x, y, z) {
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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(x, y, z);
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scene.add(light);
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}
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addLight(-1, 2, 4);
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addLight( 1, -1, -2);
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const planeWidth = 1;
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const planeHeight = 1;
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const geometry = new THREE.PlaneGeometry(planeWidth, planeHeight);
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const loader = new THREE.TextureLoader();
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function makeInstance(geometry, color, rotY, url) {
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const texture = loader.load(url, render);
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const material = new THREE.MeshPhongMaterial({
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color,
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map: texture,
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alphaTest: 0.5,
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transparent: true,
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side: THREE.DoubleSide,
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});
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const mesh = new THREE.Mesh(geometry, material);
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scene.add(mesh);
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mesh.rotation.y = rotY;
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}
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makeInstance(geometry, 'white', 0, 'resources/images/tree-01.png'); /* threejs.org: url */
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makeInstance(geometry, 'white', Math.PI * 0.5, 'resources/images/tree-02.png'); /* threejs.org: url */
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class AllMaterialPropertyGUIHelper {
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constructor(prop, scene) {
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this.prop = prop;
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this.scene = scene;
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}
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get value() {
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const {scene, prop} = this;
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let v;
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scene.traverse((obj) => {
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if (obj.material && obj.material[prop] !== undefined) {
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v = obj.material[prop];
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}
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});
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return v;
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}
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set value(v) {
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const {scene, prop} = this;
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scene.traverse((obj) => {
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if (obj.material && obj.material[prop] !== undefined) {
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obj.material[prop] = v;
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obj.material.needsUpdate = true;
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}
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});
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}
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}
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const gui = new GUI();
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gui.add(new AllMaterialPropertyGUIHelper('alphaTest', scene), 'value', 0, 1)
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.name('alphaTest')
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.onChange(requestRenderIfNotRequested);
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gui.add(new AllMaterialPropertyGUIHelper('transparent', scene), 'value')
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.name('transparent')
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.onChange(requestRenderIfNotRequested);
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function resizeRendererToDisplaySize(renderer) {
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const canvas = renderer.domElement;
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const width = canvas.clientWidth;
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const height = canvas.clientHeight;
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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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let renderRequested = false;
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function render() {
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renderRequested = undefined;
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if (resizeRendererToDisplaySize(renderer)) {
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const canvas = renderer.domElement;
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camera.aspect = canvas.clientWidth / canvas.clientHeight;
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camera.updateProjectionMatrix();
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}
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renderer.render(scene, camera);
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}
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render();
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function requestRenderIfNotRequested() {
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if (!renderRequested) {
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renderRequested = true;
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requestAnimationFrame(render);
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}
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}
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controls.addEventListener('change', requestRenderIfNotRequested);
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window.addEventListener('resize', requestRenderIfNotRequested);
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}
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main();
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</script>
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</html>
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