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164 lines
4.4 KiB
164 lines
4.4 KiB
2 years ago
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgl - materials - texture - rotation</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<link type="text/css" rel="stylesheet" href="main.css">
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</head>
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<body>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - texture rotation
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</div>
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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/": "./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 { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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let mesh, renderer, scene, camera;
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let gui;
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const API = {
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offsetX: 0,
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offsetY: 0,
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repeatX: 0.25,
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repeatY: 0.25,
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rotation: Math.PI / 4, // positive is counter-clockwise
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centerX: 0.5,
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centerY: 0.5
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};
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init();
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function init() {
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renderer = new THREE.WebGLRenderer();
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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document.body.appendChild( renderer.domElement );
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scene = new THREE.Scene();
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camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 1000 );
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camera.position.set( 10, 15, 25 );
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scene.add( camera );
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const controls = new OrbitControls( camera, renderer.domElement );
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controls.addEventListener( 'change', render );
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controls.minDistance = 20;
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controls.maxDistance = 50;
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controls.maxPolarAngle = Math.PI / 2;
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const geometry = new THREE.BoxGeometry( 10, 10, 10 );
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new THREE.TextureLoader().load( 'textures/uv_grid_opengl.jpg', function ( texture ) {
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texture.wrapS = texture.wrapT = THREE.RepeatWrapping;
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texture.anisotropy = renderer.capabilities.getMaxAnisotropy();
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//texture.matrixAutoUpdate = false; // default true; set to false to update texture.matrix manually
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const material = new THREE.MeshBasicMaterial( { map: texture } );
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mesh = new THREE.Mesh( geometry, material );
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scene.add( mesh );
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updateUvTransform();
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initGui();
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render();
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} );
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window.addEventListener( 'resize', onWindowResize );
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}
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function render() {
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renderer.render( scene, camera );
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}
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function onWindowResize() {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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render();
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}
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function updateUvTransform() {
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const texture = mesh.material.map;
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if ( texture.matrixAutoUpdate === true ) {
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texture.offset.set( API.offsetX, API.offsetY );
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texture.repeat.set( API.repeatX, API.repeatY );
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texture.center.set( API.centerX, API.centerY );
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texture.rotation = API.rotation; // rotation is around [ 0.5, 0.5 ]
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} else {
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// one way...
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//texture.matrix.setUvTransform( API.offsetX, API.offsetY, API.repeatX, API.repeatY, API.rotation, API.centerX, API.centerY );
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// another way...
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texture.matrix
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.identity()
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.translate( - API.centerX, - API.centerY )
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.rotate( API.rotation ) // I don't understand how rotation can preceed scale, but it seems to be required...
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.scale( API.repeatX, API.repeatY )
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.translate( API.centerX, API.centerY )
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.translate( API.offsetX, API.offsetY );
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}
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render();
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}
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function initGui() {
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gui = new GUI();
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gui.add( API, 'offsetX', 0.0, 1.0 ).name( 'offset.x' ).onChange( updateUvTransform );
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gui.add( API, 'offsetY', 0.0, 1.0 ).name( 'offset.y' ).onChange( updateUvTransform );
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gui.add( API, 'repeatX', 0.25, 2.0 ).name( 'repeat.x' ).onChange( updateUvTransform );
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gui.add( API, 'repeatY', 0.25, 2.0 ).name( 'repeat.y' ).onChange( updateUvTransform );
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gui.add( API, 'rotation', - 2.0, 2.0 ).name( 'rotation' ).onChange( updateUvTransform );
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gui.add( API, 'centerX', 0.0, 1.0 ).name( 'center.x' ).onChange( updateUvTransform );
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gui.add( API, 'centerY', 0.0, 1.0 ).name( 'center.y' ).onChange( updateUvTransform );
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}
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</script>
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</body>
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</html>
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