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175 lines
3.4 KiB
175 lines
3.4 KiB
/**
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* @author mrdoob / http://mrdoob.com/
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*/
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THREE.CSS2DObject = function ( element ) {
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THREE.Object3D.call( this );
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this.element = element;
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this.element.style.position = 'absolute';
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this.addEventListener( 'removed', function () {
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if ( this.element.parentNode !== null ) {
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this.element.parentNode.removeChild( this.element );
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}
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} );
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};
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THREE.CSS2DObject.prototype = Object.create( THREE.Object3D.prototype );
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THREE.CSS2DObject.prototype.constructor = THREE.CSS2DObject;
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//
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THREE.CSS2DRenderer = function () {
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console.log( 'THREE.CSS2DRenderer', THREE.REVISION );
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var _width, _height;
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var _widthHalf, _heightHalf;
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var vector = new THREE.Vector3();
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var viewMatrix = new THREE.Matrix4();
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var viewProjectionMatrix = new THREE.Matrix4();
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var cache = {
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objects: new WeakMap()
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};
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var domElement = document.createElement( 'div' );
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domElement.style.overflow = 'hidden';
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this.domElement = domElement;
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this.getSize = function () {
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return {
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width: _width,
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height: _height
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};
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};
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this.setSize = function ( width, height ) {
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_width = width;
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_height = height;
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_widthHalf = _width / 2;
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_heightHalf = _height / 2;
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domElement.style.width = width + 'px';
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domElement.style.height = height + 'px';
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};
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var renderObject = function ( object, camera ) {
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if ( object instanceof THREE.CSS2DObject ) {
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vector.setFromMatrixPosition( object.matrixWorld );
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vector.applyMatrix4( viewProjectionMatrix );
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var element = object.element;
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var style = 'translate(-50%,-50%) translate(' + ( vector.x * _widthHalf + _widthHalf ) + 'px,' + ( - vector.y * _heightHalf + _heightHalf ) + 'px)';
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element.style.WebkitTransform = style;
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element.style.MozTransform = style;
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element.style.oTransform = style;
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element.style.transform = style;
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element.style.display = ( vector.z < - 1 || vector.z > 1 ) ? 'none' : '';
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var objectData = {
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distanceToCameraSquared: getDistanceToSquared( camera, object )
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};
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cache.objects.set( object, objectData );
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if ( element.parentNode !== domElement ) {
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domElement.appendChild( element );
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}
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}
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for ( var i = 0, l = object.children.length; i < l; i ++ ) {
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renderObject( object.children[ i ], camera );
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}
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};
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var getDistanceToSquared = function () {
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var a = new THREE.Vector3();
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var b = new THREE.Vector3();
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return function ( object1, object2 ) {
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a.setFromMatrixPosition( object1.matrixWorld );
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b.setFromMatrixPosition( object2.matrixWorld );
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return a.distanceToSquared( b );
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};
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}();
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var filterAndFlatten = function ( scene ) {
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var result = [];
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scene.traverse( function ( object ) {
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if ( object instanceof THREE.CSS2DObject ) result.push( object );
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} );
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return result;
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};
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var zOrder = function ( scene ) {
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var sorted = filterAndFlatten( scene ).sort( function ( a, b ) {
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var distanceA = cache.objects.get( a ).distanceToCameraSquared;
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var distanceB = cache.objects.get( b ).distanceToCameraSquared;
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return distanceA - distanceB;
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} );
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var zMax = sorted.length;
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for ( var i = 0, l = sorted.length; i < l; i ++ ) {
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sorted[ i ].element.style.zIndex = zMax - i;
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}
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};
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this.render = function ( scene, camera ) {
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scene.updateMatrixWorld();
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if ( camera.parent === null ) camera.updateMatrixWorld();
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viewMatrix.copy( camera.matrixWorldInverse );
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viewProjectionMatrix.multiplyMatrices( camera.projectionMatrix, viewMatrix );
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renderObject( scene, camera );
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zOrder( scene );
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};
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};
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