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369 lines
9.3 KiB
369 lines
9.3 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 raycaster - texture</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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<style>
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body {
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background-color: #fff;
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color: #444;
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}
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a {
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color: #08f;
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}
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</style>
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</head>
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<body>
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<div id="container"></div>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> raycaster - texture
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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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const WRAPPING = {
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'RepeatWrapping': THREE.RepeatWrapping,
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'ClampToEdgeWrapping': THREE.ClampToEdgeWrapping,
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'MirroredRepeatWrapping': THREE.MirroredRepeatWrapping
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};
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const params = {
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wrapS: THREE.RepeatWrapping,
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wrapT: THREE.RepeatWrapping,
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offsetX: 0,
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offsetY: 0,
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repeatX: 1,
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repeatY: 1,
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rotation: 0,
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};
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function CanvasTexture( parentTexture ) {
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this._canvas = document.createElement( 'canvas' );
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this._canvas.width = this._canvas.height = 1024;
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this._context2D = this._canvas.getContext( '2d' );
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if ( parentTexture ) {
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this._parentTexture.push( parentTexture );
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parentTexture.image = this._canvas;
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}
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const that = this;
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this._background = document.createElement( 'img' );
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this._background.addEventListener( 'load', function () {
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that._canvas.width = that._background.naturalWidth;
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that._canvas.height = that._background.naturalHeight;
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that._crossRadius = Math.ceil( Math.min( that._canvas.width, that._canvas.height / 30 ) );
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that._crossMax = Math.ceil( 0.70710678 * that._crossRadius );
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that._crossMin = Math.ceil( that._crossMax / 10 );
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that._crossThickness = Math.ceil( that._crossMax / 10 );
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that._draw();
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} );
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this._background.crossOrigin = '';
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this._background.src = 'textures/uv_grid_opengl.jpg';
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this._draw();
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}
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CanvasTexture.prototype = {
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constructor: CanvasTexture,
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_canvas: null,
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_context2D: null,
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_xCross: 0,
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_yCross: 0,
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_crossRadius: 57,
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_crossMax: 40,
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_crossMin: 4,
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_crossThickness: 4,
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_parentTexture: [],
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addParent: function ( parentTexture ) {
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if ( this._parentTexture.indexOf( parentTexture ) === - 1 ) {
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this._parentTexture.push( parentTexture );
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parentTexture.image = this._canvas;
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}
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},
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setCrossPosition: function ( x, y ) {
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this._xCross = x * this._canvas.width;
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this._yCross = y * this._canvas.height;
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this._draw();
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},
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_draw: function () {
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if ( ! this._context2D ) return;
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this._context2D.clearRect( 0, 0, this._canvas.width, this._canvas.height );
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// Background.
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this._context2D.drawImage( this._background, 0, 0 );
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// Yellow cross.
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this._context2D.lineWidth = this._crossThickness * 3;
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this._context2D.strokeStyle = '#FFFF00';
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this._context2D.beginPath();
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this._context2D.moveTo( this._xCross - this._crossMax - 2, this._yCross - this._crossMax - 2 );
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this._context2D.lineTo( this._xCross - this._crossMin, this._yCross - this._crossMin );
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this._context2D.moveTo( this._xCross + this._crossMin, this._yCross + this._crossMin );
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this._context2D.lineTo( this._xCross + this._crossMax + 2, this._yCross + this._crossMax + 2 );
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this._context2D.moveTo( this._xCross - this._crossMax - 2, this._yCross + this._crossMax + 2 );
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this._context2D.lineTo( this._xCross - this._crossMin, this._yCross + this._crossMin );
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this._context2D.moveTo( this._xCross + this._crossMin, this._yCross - this._crossMin );
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this._context2D.lineTo( this._xCross + this._crossMax + 2, this._yCross - this._crossMax - 2 );
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this._context2D.stroke();
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for ( let i = 0; i < this._parentTexture.length; i ++ ) {
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this._parentTexture[ i ].needsUpdate = true;
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}
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}
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};
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const width = window.innerWidth;
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const height = window.innerHeight;
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let canvas;
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let planeTexture, cubeTexture, circleTexture;
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let container;
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let camera, scene, renderer;
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const raycaster = new THREE.Raycaster();
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const mouse = new THREE.Vector2();
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const onClickPosition = new THREE.Vector2();
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init();
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render();
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function init() {
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container = document.getElementById( 'container' );
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scene = new THREE.Scene();
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scene.background = new THREE.Color( 0xeeeeee );
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camera = new THREE.PerspectiveCamera( 45, width / height, 1, 1000 );
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camera.position.x = - 30;
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camera.position.y = 40;
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camera.position.z = 50;
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camera.lookAt( scene.position );
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renderer = new THREE.WebGLRenderer();
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( width, height );
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container.appendChild( renderer.domElement );
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// A cube, in the middle.
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cubeTexture = new THREE.Texture( undefined, THREE.UVMapping, THREE.RepeatWrapping, THREE.RepeatWrapping );
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canvas = new CanvasTexture( cubeTexture );
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const cubeMaterial = new THREE.MeshBasicMaterial( { map: cubeTexture } );
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const cubeGeometry = new THREE.BoxGeometry( 20, 20, 20 );
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let uvs = cubeGeometry.attributes.uv.array;
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// Set a specific texture mapping.
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for ( let i = 0; i < uvs.length; i ++ ) {
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uvs[ i ] *= 2;
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}
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const cube = new THREE.Mesh( cubeGeometry, cubeMaterial );
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cube.position.x = 4;
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cube.position.y = - 5;
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cube.position.z = 0;
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scene.add( cube );
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// A plane on the left
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planeTexture = new THREE.Texture( undefined, THREE.UVMapping, THREE.MirroredRepeatWrapping, THREE.MirroredRepeatWrapping );
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canvas.addParent( planeTexture );
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const planeMaterial = new THREE.MeshBasicMaterial( { map: planeTexture } );
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const planeGeometry = new THREE.PlaneGeometry( 25, 25, 1, 1 );
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uvs = planeGeometry.attributes.uv.array;
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// Set a specific texture mapping.
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for ( let i = 0; i < uvs.length; i ++ ) {
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uvs[ i ] *= 2;
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}
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const plane = new THREE.Mesh( planeGeometry, planeMaterial );
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plane.position.x = - 16;
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plane.position.y = - 5;
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plane.position.z = 0;
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scene.add( plane );
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// A circle on the right.
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circleTexture = new THREE.Texture( undefined, THREE.UVMapping, THREE.RepeatWrapping, THREE.RepeatWrapping );
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canvas.addParent( circleTexture );
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const circleMaterial = new THREE.MeshBasicMaterial( { map: circleTexture } );
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const circleGeometry = new THREE.CircleGeometry( 25, 40, 0, Math.PI * 2 );
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uvs = circleGeometry.attributes.uv.array;
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// Set a specific texture mapping.
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for ( let i = 0; i < uvs.length; i ++ ) {
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uvs[ i ] = ( uvs[ i ] - 0.25 ) * 2;
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}
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const circle = new THREE.Mesh( circleGeometry, circleMaterial );
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circle.position.x = 24;
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circle.position.y = - 5;
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circle.position.z = 0;
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scene.add( circle );
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window.addEventListener( 'resize', onWindowResize );
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container.addEventListener( 'mousemove', onMouseMove );
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//
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const gui = new GUI();
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gui.title( 'Circle Texture Settings' );
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gui.add( params, 'wrapS', WRAPPING ).onChange( setwrapS );
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gui.add( params, 'wrapT', WRAPPING ).onChange( setwrapT );
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gui.add( params, 'offsetX', 0, 5 );
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gui.add( params, 'offsetY', 0, 5 );
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gui.add( params, 'repeatX', 0, 5 );
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gui.add( params, 'repeatY', 0, 5 );
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gui.add( params, 'rotation', 0, 2 * Math.PI );
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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 onMouseMove( evt ) {
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evt.preventDefault();
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const array = getMousePosition( container, evt.clientX, evt.clientY );
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onClickPosition.fromArray( array );
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const intersects = getIntersects( onClickPosition, scene.children );
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if ( intersects.length > 0 && intersects[ 0 ].uv ) {
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const uv = intersects[ 0 ].uv;
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intersects[ 0 ].object.material.map.transformUv( uv );
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canvas.setCrossPosition( uv.x, uv.y );
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}
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}
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function getMousePosition( dom, x, y ) {
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const rect = dom.getBoundingClientRect();
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return [ ( x - rect.left ) / rect.width, ( y - rect.top ) / rect.height ];
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}
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function getIntersects( point, objects ) {
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mouse.set( ( point.x * 2 ) - 1, - ( point.y * 2 ) + 1 );
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raycaster.setFromCamera( mouse, camera );
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return raycaster.intersectObjects( objects, false );
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}
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function render() {
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requestAnimationFrame( render );
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// update texture parameters
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circleTexture.offset.x = params.offsetX;
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circleTexture.offset.y = params.offsetY;
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circleTexture.repeat.x = params.repeatX;
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circleTexture.repeat.y = params.repeatY;
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circleTexture.rotation = params.rotation;
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//
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renderer.render( scene, camera );
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}
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function setwrapS( value ) {
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circleTexture.wrapS = value;
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circleTexture.needsUpdate = true;
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}
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function setwrapT( value ) {
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circleTexture.wrapT = value;
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circleTexture.needsUpdate = true;
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}
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</script>
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</body>
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</html>
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