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376 lines
9.9 KiB
376 lines
9.9 KiB
<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js raycast - 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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<style>
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body {
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color: #808080;
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font-family: Monospace;
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font-size: 13px;
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text-align: center;
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background-color: #ffffff;
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margin: 0px;
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overflow: hidden;
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}
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#info {
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position: absolute;
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top: 0px; width: 100%;
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padding: 5px;
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}
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#controls {
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position: absolute;
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text-align:left;
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top: 40px;
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left: 5px;
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padding: 5px;
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}
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.control { margin-bottom: 3px; }
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input { width: 50px; }
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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"><a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - raycast texture<br>Left to right: buffer geometry - geometry - indexed buffer geometry</div>
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<fieldset id="controls">
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<legend>Circle</legend>
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<div class="control">
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WrapS : <select onchange="setwrapS(this)">
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<option value="ClampToEdgeWrapping">ClampToEdgeWrapping</option>
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<option value="RepeatWrapping" selected>RepeatWrapping</option>
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<option value="MirroredRepeatWrapping">MirroredRepeatWrapping</option>
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</select>
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</div>
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<div class="control">
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WrapT : <select onchange="setwrapT(this)">
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<option value="ClampToEdgeWrapping">ClampToEdgeWrapping</option>
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<option value="RepeatWrapping" selected>RepeatWrapping</option>
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<option value="MirroredRepeatWrapping">MirroredRepeatWrapping</option>
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</select>
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</div>
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<div class="control">
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Offset : X <input type="number" value="0" step="0.05" onchange="setOffsetU(this)" />
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Y <input type="number" value="0" step="0.05" onchange="setOffsetV(this)" /><br />
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</div>
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<div class="control">
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Repeat : X <input type="number" value="1" step="0.1" onchange="setRepeatU(this)" />
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Y <input type="number" value="1" step="0.1" onchange="setRepeatV(this)" />
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</div>
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<div class="control">
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Rotation : <input type="number" value="0" step="0.1" onchange="setRotation(this)" />
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</div>
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</fieldset>
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<script src="../build/three.js"></script>
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<script>
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var CanvasTexture = function ( 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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var 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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}, false );
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this._background.crossOrigin = '';
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this._background.src = "textures/UV_Grid_Sm.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 ( var 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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var width = window.innerWidth;
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var height = window.innerHeight;
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var canvas;
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var planeTexture, cubeTexture, circleTexture;
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var container;
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var camera, scene, renderer;
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var raycaster = new THREE.Raycaster();
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var mouse = new THREE.Vector2();
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var 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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var cubeMaterial = new THREE.MeshBasicMaterial( { map: cubeTexture } );
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var cubeGeometry = new THREE.BoxBufferGeometry( 20, 20, 20 );
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var uvs = cubeGeometry.attributes.uv.array;
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// Set a specific texture mapping.
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for ( var i = 0; i < uvs.length; i ++ ) {
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uvs[ i ] *= 2;
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}
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var 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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var planeMaterial = new THREE.MeshBasicMaterial( { map: planeTexture } );
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var planeGeometry = new THREE.PlaneBufferGeometry( 25, 25, 1, 1 );
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var uvs = planeGeometry.attributes.uv.array;
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// Set a specific texture mapping.
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for ( var i = 0; i < uvs.length; i ++ ) {
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uvs[ i ] *= 2;
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}
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var 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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var circleMaterial = new THREE.MeshBasicMaterial( { map: circleTexture } );
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var circleGeometry = new THREE.CircleBufferGeometry( 25, 40, 0, Math.PI * 2 );
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var uvs = circleGeometry.attributes.uv.array;
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// Set a specific texture mapping.
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for ( var 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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var 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, false );
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container.addEventListener( 'mousemove', onMouseMove, false );
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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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var array = getMousePosition( container, evt.clientX, evt.clientY );
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onClickPosition.fromArray( array );
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var intersects = getIntersects( onClickPosition, scene.children );
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if ( intersects.length > 0 && intersects[ 0 ].uv ) {
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var 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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var getMousePosition = function ( dom, x, y ) {
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var 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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var getIntersects = function ( 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 );
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};
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function render() {
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requestAnimationFrame( render );
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renderer.render( scene, camera );
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}
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function setwrapS( that ) {
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circleTexture.wrapS = THREE[ that.value ];
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circleTexture.needsUpdate = true;
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}
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function setwrapT( that ) {
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circleTexture.wrapT = THREE[ that.value ];
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circleTexture.needsUpdate = true;
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}
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function setOffsetU( that ) {
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circleTexture.offset.x = parseFloat( that.value );
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}
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function setOffsetV( that ) {
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circleTexture.offset.y = parseFloat( that.value );
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}
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function setRepeatU( that ) {
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circleTexture.repeat.x = parseFloat( that.value );
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}
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function setRepeatV( that ) {
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circleTexture.repeat.y = parseFloat( that.value );
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}
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function setRotation( that ) {
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circleTexture.rotation = parseFloat( that.value );
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}
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</script>
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</body>
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</html>
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