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webgl_raycast_texture.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js raycast - texture</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<style>
body {
color: #808080;
font-family: Monospace;
font-size: 13px;
text-align: center;
background-color: #ffffff;
margin: 0px;
overflow: hidden;
}
#info {
position: absolute;
top: 0px; width: 100%;
padding: 5px;
}
#controls {
position: absolute;
text-align:left;
top: 40px;
left: 5px;
padding: 5px;
}
.control { margin-bottom: 3px; }
input { width: 50px; }
</style>
</head>
<body>
<div id="container"></div>
<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>
<fieldset id="controls">
<legend>Circle</legend>
<div class="control">
WrapS : <select onchange="setwrapS(this)">
<option value="ClampToEdgeWrapping">ClampToEdgeWrapping</option>
<option value="RepeatWrapping" selected>RepeatWrapping</option>
<option value="MirroredRepeatWrapping">MirroredRepeatWrapping</option>
</select>
</div>
<div class="control">
WrapT : <select onchange="setwrapT(this)">
<option value="ClampToEdgeWrapping">ClampToEdgeWrapping</option>
<option value="RepeatWrapping" selected>RepeatWrapping</option>
<option value="MirroredRepeatWrapping">MirroredRepeatWrapping</option>
</select>
</div>
<div class="control">
Offset : X <input type="number" value="0" step="0.05" onchange="setOffsetU(this)" />
Y <input type="number" value="0" step="0.05" onchange="setOffsetV(this)" /><br />
</div>
<div class="control">
Repeat : X <input type="number" value="1" step="0.1" onchange="setRepeatU(this)" />
Y <input type="number" value="1" step="0.1" onchange="setRepeatV(this)" />
</div>
<div class="control">
Rotation : <input type="number" value="0" step="0.1" onchange="setRotation(this)" />
</div>
</fieldset>
<script src="../build/three.js"></script>
<script>
var CanvasTexture = function ( parentTexture ) {
this._canvas = document.createElement( "canvas" );
this._canvas.width = this._canvas.height = 1024;
this._context2D = this._canvas.getContext( "2d" );
if ( parentTexture ) {
this._parentTexture.push( parentTexture );
parentTexture.image = this._canvas;
}
var that = this;
this._background = document.createElement( "img" );
this._background.addEventListener( "load", function () {
that._canvas.width = that._background.naturalWidth;
that._canvas.height = that._background.naturalHeight;
that._crossRadius = Math.ceil( Math.min( that._canvas.width, that._canvas.height / 30 ) );
that._crossMax = Math.ceil( 0.70710678 * that._crossRadius );
that._crossMin = Math.ceil( that._crossMax / 10 );
that._crossThickness = Math.ceil( that._crossMax / 10 );
that._draw();
}, false );
this._background.crossOrigin = '';
this._background.src = "textures/UV_Grid_Sm.jpg";
this._draw();
};
CanvasTexture.prototype = {
constructor: CanvasTexture,
_canvas: null,
_context2D: null,
_xCross: 0,
_yCross: 0,
_crossRadius: 57,
_crossMax: 40,
_crossMin: 4,
_crossThickness: 4,
_parentTexture: [],
addParent: function ( parentTexture ) {
if ( this._parentTexture.indexOf( parentTexture ) === - 1 ) {
this._parentTexture.push( parentTexture );
parentTexture.image = this._canvas;
}
},
setCrossPosition: function ( x, y ) {
this._xCross = x * this._canvas.width;
this._yCross = y * this._canvas.height;
this._draw();
},
_draw: function () {
if ( ! this._context2D ) return;
this._context2D.clearRect( 0, 0, this._canvas.width, this._canvas.height );
// Background.
this._context2D.drawImage( this._background, 0, 0 );
// Yellow cross.
this._context2D.lineWidth = this._crossThickness * 3;
this._context2D.strokeStyle = "#FFFF00";
this._context2D.beginPath();
this._context2D.moveTo( this._xCross - this._crossMax - 2, this._yCross - this._crossMax - 2 );
this._context2D.lineTo( this._xCross - this._crossMin, this._yCross - this._crossMin );
this._context2D.moveTo( this._xCross + this._crossMin, this._yCross + this._crossMin );
this._context2D.lineTo( this._xCross + this._crossMax + 2, this._yCross + this._crossMax + 2 );
this._context2D.moveTo( this._xCross - this._crossMax - 2, this._yCross + this._crossMax + 2 );
this._context2D.lineTo( this._xCross - this._crossMin, this._yCross + this._crossMin );
this._context2D.moveTo( this._xCross + this._crossMin, this._yCross - this._crossMin );
this._context2D.lineTo( this._xCross + this._crossMax + 2, this._yCross - this._crossMax - 2 );
this._context2D.stroke();
for ( var i = 0; i < this._parentTexture.length; i ++ ) {
this._parentTexture[ i ].needsUpdate = true;
}
}
};
var width = window.innerWidth;
var height = window.innerHeight;
var canvas;
var planeTexture, cubeTexture, circleTexture;
var container;
var camera, scene, renderer;
var raycaster = new THREE.Raycaster();
var mouse = new THREE.Vector2();
var onClickPosition = new THREE.Vector2();
init();
render();
function init() {
container = document.getElementById( "container" );
scene = new THREE.Scene();
scene.background = new THREE.Color( 0xeeeeee );
camera = new THREE.PerspectiveCamera( 45, width / height, 1, 1000 );
camera.position.x = - 30;
camera.position.y = 40;
camera.position.z = 50;
camera.lookAt( scene.position );
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( width, height );
container.appendChild( renderer.domElement );
// A cube, in the middle.
cubeTexture = new THREE.Texture( undefined, THREE.UVMapping, THREE.RepeatWrapping, THREE.RepeatWrapping );
canvas = new CanvasTexture( cubeTexture );
var cubeMaterial = new THREE.MeshBasicMaterial( { map: cubeTexture } );
var cubeGeometry = new THREE.BoxBufferGeometry( 20, 20, 20 );
var uvs = cubeGeometry.attributes.uv.array;
// Set a specific texture mapping.
for ( var i = 0; i < uvs.length; i ++ ) {
uvs[ i ] *= 2;
}
var cube = new THREE.Mesh( cubeGeometry, cubeMaterial );
cube.position.x = 4;
cube.position.y = - 5;
cube.position.z = 0;
scene.add( cube );
// A plane on the left.
planeTexture = new THREE.Texture( undefined, THREE.UVMapping, THREE.MirroredRepeatWrapping, THREE.MirroredRepeatWrapping );
canvas.addParent( planeTexture );
var planeMaterial = new THREE.MeshBasicMaterial( { map: planeTexture } );
var planeGeometry = new THREE.PlaneBufferGeometry( 25, 25, 1, 1 );
var uvs = planeGeometry.attributes.uv.array;
// Set a specific texture mapping.
for ( var i = 0; i < uvs.length; i ++ ) {
uvs[ i ] *= 2;
}
var plane = new THREE.Mesh( planeGeometry, planeMaterial );
plane.position.x = - 16;
plane.position.y = - 5;
plane.position.z = 0;
scene.add( plane );
// A circle on the right.
circleTexture = new THREE.Texture( undefined, THREE.UVMapping, THREE.RepeatWrapping, THREE.RepeatWrapping );
canvas.addParent( circleTexture );
var circleMaterial = new THREE.MeshBasicMaterial( { map: circleTexture } );
var circleGeometry = new THREE.CircleBufferGeometry( 25, 40, 0, Math.PI * 2 );
var uvs = circleGeometry.attributes.uv.array;
// Set a specific texture mapping.
for ( var i = 0; i < uvs.length; i ++ ) {
uvs[ i ] = ( uvs[ i ] - 0.25 ) * 2;
}
var circle = new THREE.Mesh( circleGeometry, circleMaterial );
circle.position.x = 24;
circle.position.y = - 5;
circle.position.z = 0;
scene.add( circle );
window.addEventListener( 'resize', onWindowResize, false );
container.addEventListener( 'mousemove', onMouseMove, false );
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function onMouseMove( evt ) {
evt.preventDefault();
var array = getMousePosition( container, evt.clientX, evt.clientY );
onClickPosition.fromArray( array );
var intersects = getIntersects( onClickPosition, scene.children );
if ( intersects.length > 0 && intersects[ 0 ].uv ) {
var uv = intersects[ 0 ].uv;
intersects[ 0 ].object.material.map.transformUv( uv );
canvas.setCrossPosition( uv.x, uv.y );
}
}
var getMousePosition = function ( dom, x, y ) {
var rect = dom.getBoundingClientRect();
return [ ( x - rect.left ) / rect.width, ( y - rect.top ) / rect.height ];
};
var getIntersects = function ( point, objects ) {
mouse.set( ( point.x * 2 ) - 1, - ( point.y * 2 ) + 1 );
raycaster.setFromCamera( mouse, camera );
return raycaster.intersectObjects( objects );
};
function render() {
requestAnimationFrame( render );
renderer.render( scene, camera );
}
function setwrapS( that ) {
circleTexture.wrapS = THREE[ that.value ];
circleTexture.needsUpdate = true;
}
function setwrapT( that ) {
circleTexture.wrapT = THREE[ that.value ];
circleTexture.needsUpdate = true;
}
function setOffsetU( that ) {
circleTexture.offset.x = parseFloat( that.value );
}
function setOffsetV( that ) {
circleTexture.offset.y = parseFloat( that.value );
}
function setRepeatU( that ) {
circleTexture.repeat.x = parseFloat( that.value );
}
function setRepeatV( that ) {
circleTexture.repeat.y = parseFloat( that.value );
}
function setRotation( that ) {
circleTexture.rotation = parseFloat( that.value );
}
</script>
</body>
</html>