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202 lines
4.2 KiB
HTML
202 lines
4.2 KiB
HTML
<!-- 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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<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( { antialias: true, 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 = 3;
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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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texture.colorSpace = THREE.SRGBColorSpace;
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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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