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204 lines
5.0 KiB
HTML
204 lines
5.0 KiB
HTML
2 months 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 - exporter - ktx2</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 - exporter - ktx2
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</div>
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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 { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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import { KTX2Exporter } from 'three/addons/exporters/KTX2Exporter.js';
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import { RGBELoader } from 'three/addons/loaders/RGBELoader.js';
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import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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let scene, camera, renderer, exporter, mesh, controls, renderTarget, dataTexture;
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const params = {
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target: 'pmrem',
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export: exportFile
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};
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init();
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function init() {
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renderer = new THREE.WebGLRenderer( { antialias: true } );
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renderer.toneMapping = THREE.AgXToneMapping;
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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renderer.setAnimationLoop( animate );
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document.body.appendChild( renderer.domElement );
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//
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camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.1, 100 );
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camera.position.set( 10, 0, 0 );
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scene = new THREE.Scene();
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exporter = new KTX2Exporter();
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const rgbeloader = new RGBELoader();
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//
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const pmremGenerator = new THREE.PMREMGenerator( renderer );
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pmremGenerator.compileEquirectangularShader();
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rgbeloader.load( 'textures/equirectangular/venice_sunset_1k.hdr', function ( texture ) {
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texture.mapping = THREE.EquirectangularReflectionMapping;
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renderTarget = pmremGenerator.fromEquirectangular( texture );
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scene.background = renderTarget.texture;
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} );
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createDataTexture();
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//
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controls = new OrbitControls( camera, renderer.domElement );
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controls.enableDamping = true;
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controls.rotateSpeed = - 0.25; // negative, to track mouse pointer
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//
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window.addEventListener( 'resize', onWindowResize );
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const gui = new GUI();
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gui.add( params, 'target' ).options( [ 'pmrem', 'data-texture' ] ).onChange( swapScene );
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gui.add( params, 'export' ).name( 'Export KTX2' );
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gui.open();
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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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}
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function animate() {
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controls.update();
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renderer.render( scene, camera );
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}
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function createDataTexture() {
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const normal = new THREE.Vector3();
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const coord = new THREE.Vector2();
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const size = 800, radius = 320, factor = Math.PI * 0.5 / radius;
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const data = new Float32Array( 4 * size * size );
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for ( let i = 0; i < size; i ++ ) {
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for ( let j = 0; j < size; j ++ ) {
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const idx = i * size * 4 + j * 4;
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coord.set( j, i ).subScalar( size / 2 );
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if ( coord.length() < radius )
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normal.set(
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Math.sin( coord.x * factor ),
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Math.sin( coord.y * factor ),
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Math.cos( coord.x * factor )
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);
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else
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normal.set( 0, 0, 1 );
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data[ idx + 0 ] = .5 + .5 * normal.x;
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data[ idx + 1 ] = .5 + .5 * normal.y;
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data[ idx + 2 ] = .5 + .5 * normal.z;
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data[ idx + 3 ] = 1.;
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}
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}
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dataTexture = new THREE.DataTexture( data, size, size, THREE.RGBAFormat, THREE.FloatType );
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dataTexture.needsUpdate = true;
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const material = new THREE.MeshBasicMaterial( { map: dataTexture } );
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const quad = new THREE.PlaneGeometry( 50, 50 );
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mesh = new THREE.Mesh( quad, material );
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mesh.visible = false;
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scene.add( mesh );
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}
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function swapScene() {
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if ( params.target == 'pmrem' ) {
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camera.position.set( 10, 0, 0 );
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controls.enabled = true;
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scene.background = renderTarget.texture;
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mesh.visible = false;
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renderer.toneMapping = THREE.AgXToneMapping;
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} else {
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camera.position.set( 0, 0, 70 );
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controls.enabled = false;
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scene.background = new THREE.Color( 0, 0, 0 );
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mesh.visible = true;
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renderer.toneMapping = THREE.NoToneMapping;
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}
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}
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async function exportFile() {
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let result;
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if ( params.target == 'pmrem' )
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result = await exporter.parse( renderer, renderTarget );
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else
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result = await exporter.parse( dataTexture );
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saveArrayBuffer( result, params.target + '.ktx2' );
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}
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function saveArrayBuffer( buffer, filename ) {
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const blob = new Blob( [ buffer ], { type: 'image/ktx2' } );
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const link = document.createElement( 'a' );
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link.href = URL.createObjectURL( blob );
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link.download = filename;
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link.click();
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}
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</script>
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</body>
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</html>
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