import { Matrix4, Object3D, Quaternion, Vector3 } from 'three'; /** * Based on http://www.emagix.net/academic/mscs-project/item/camera-sync-with-css3-and-webgl-threejs */ const _position = new Vector3(); const _quaternion = new Quaternion(); const _scale = new Vector3(); class CSS3DObject extends Object3D { constructor( element = document.createElement( 'div' ) ) { super(); this.isCSS3DObject = true; this.element = element; this.element.style.position = 'absolute'; this.element.style.pointerEvents = 'auto'; this.element.style.userSelect = 'none'; this.element.setAttribute( 'draggable', false ); this.addEventListener( 'removed', function () { this.traverse( function ( object ) { if ( object.element instanceof Element && object.element.parentNode !== null ) { object.element.parentNode.removeChild( object.element ); } } ); } ); } copy( source, recursive ) { super.copy( source, recursive ); this.element = source.element.cloneNode( true ); return this; } } class CSS3DSprite extends CSS3DObject { constructor( element ) { super( element ); this.isCSS3DSprite = true; this.rotation2D = 0; } copy( source, recursive ) { super.copy( source, recursive ); this.rotation2D = source.rotation2D; return this; } } // const _matrix = new Matrix4(); const _matrix2 = new Matrix4(); class CSS3DRenderer { constructor( parameters = {} ) { const _this = this; let _width, _height; let _widthHalf, _heightHalf; const cache = { camera: { fov: 0, style: '' }, objects: new WeakMap() }; const domElement = parameters.element !== undefined ? parameters.element : document.createElement( 'div' ); domElement.style.overflow = 'hidden'; this.domElement = domElement; const cameraElement = document.createElement( 'div' ); cameraElement.style.transformStyle = 'preserve-3d'; cameraElement.style.pointerEvents = 'none'; domElement.appendChild( cameraElement ); this.getSize = function () { return { width: _width, height: _height }; }; this.render = function ( scene, camera ) { const fov = camera.projectionMatrix.elements[ 5 ] * _heightHalf; if ( cache.camera.fov !== fov ) { domElement.style.perspective = camera.isPerspectiveCamera ? fov + 'px' : ''; cache.camera.fov = fov; } if ( scene.matrixWorldAutoUpdate === true ) scene.updateMatrixWorld(); if ( camera.parent === null && camera.matrixWorldAutoUpdate === true ) camera.updateMatrixWorld(); let tx, ty; if ( camera.isOrthographicCamera ) { tx = - ( camera.right + camera.left ) / 2; ty = ( camera.top + camera.bottom ) / 2; } const cameraCSSMatrix = camera.isOrthographicCamera ? 'scale(' + fov + ')' + 'translate(' + epsilon( tx ) + 'px,' + epsilon( ty ) + 'px)' + getCameraCSSMatrix( camera.matrixWorldInverse ) : 'translateZ(' + fov + 'px)' + getCameraCSSMatrix( camera.matrixWorldInverse ); const style = cameraCSSMatrix + 'translate(' + _widthHalf + 'px,' + _heightHalf + 'px)'; if ( cache.camera.style !== style ) { cameraElement.style.transform = style; cache.camera.style = style; } renderObject( scene, scene, camera, cameraCSSMatrix ); }; this.setSize = function ( width, height ) { _width = width; _height = height; _widthHalf = _width / 2; _heightHalf = _height / 2; domElement.style.width = width + 'px'; domElement.style.height = height + 'px'; cameraElement.style.width = width + 'px'; cameraElement.style.height = height + 'px'; }; function epsilon( value ) { return Math.abs( value ) < 1e-10 ? 0 : value; } function getCameraCSSMatrix( matrix ) { const elements = matrix.elements; return 'matrix3d(' + epsilon( elements[ 0 ] ) + ',' + epsilon( - elements[ 1 ] ) + ',' + epsilon( elements[ 2 ] ) + ',' + epsilon( elements[ 3 ] ) + ',' + epsilon( elements[ 4 ] ) + ',' + epsilon( - elements[ 5 ] ) + ',' + epsilon( elements[ 6 ] ) + ',' + epsilon( elements[ 7 ] ) + ',' + epsilon( elements[ 8 ] ) + ',' + epsilon( - elements[ 9 ] ) + ',' + epsilon( elements[ 10 ] ) + ',' + epsilon( elements[ 11 ] ) + ',' + epsilon( elements[ 12 ] ) + ',' + epsilon( - elements[ 13 ] ) + ',' + epsilon( elements[ 14 ] ) + ',' + epsilon( elements[ 15 ] ) + ')'; } function getObjectCSSMatrix( matrix ) { const elements = matrix.elements; const matrix3d = 'matrix3d(' + epsilon( elements[ 0 ] ) + ',' + epsilon( elements[ 1 ] ) + ',' + epsilon( elements[ 2 ] ) + ',' + epsilon( elements[ 3 ] ) + ',' + epsilon( - elements[ 4 ] ) + ',' + epsilon( - elements[ 5 ] ) + ',' + epsilon( - elements[ 6 ] ) + ',' + epsilon( - elements[ 7 ] ) + ',' + epsilon( elements[ 8 ] ) + ',' + epsilon( elements[ 9 ] ) + ',' + epsilon( elements[ 10 ] ) + ',' + epsilon( elements[ 11 ] ) + ',' + epsilon( elements[ 12 ] ) + ',' + epsilon( elements[ 13 ] ) + ',' + epsilon( elements[ 14 ] ) + ',' + epsilon( elements[ 15 ] ) + ')'; return 'translate(-50%,-50%)' + matrix3d; } function renderObject( object, scene, camera, cameraCSSMatrix ) { if ( object.isCSS3DObject ) { const visible = ( object.visible === true ) && ( object.layers.test( camera.layers ) === true ); object.element.style.display = ( visible === true ) ? '' : 'none'; if ( visible === true ) { object.onBeforeRender( _this, scene, camera ); let style; if ( object.isCSS3DSprite ) { // http://swiftcoder.wordpress.com/2008/11/25/constructing-a-billboard-matrix/ _matrix.copy( camera.matrixWorldInverse ); _matrix.transpose(); if ( object.rotation2D !== 0 ) _matrix.multiply( _matrix2.makeRotationZ( object.rotation2D ) ); object.matrixWorld.decompose( _position, _quaternion, _scale ); _matrix.setPosition( _position ); _matrix.scale( _scale ); _matrix.elements[ 3 ] = 0; _matrix.elements[ 7 ] = 0; _matrix.elements[ 11 ] = 0; _matrix.elements[ 15 ] = 1; style = getObjectCSSMatrix( _matrix ); } else { style = getObjectCSSMatrix( object.matrixWorld ); } const element = object.element; const cachedObject = cache.objects.get( object ); if ( cachedObject === undefined || cachedObject.style !== style ) { element.style.transform = style; const objectData = { style: style }; cache.objects.set( object, objectData ); } if ( element.parentNode !== cameraElement ) { cameraElement.appendChild( element ); } object.onAfterRender( _this, scene, camera ); } } for ( let i = 0, l = object.children.length; i < l; i ++ ) { renderObject( object.children[ i ], scene, camera, cameraCSSMatrix ); } } } } export { CSS3DObject, CSS3DSprite, CSS3DRenderer };