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| 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 object.element.ownerDocument.defaultView.Element && | |
| object.element.parentNode !== null | |
| ) { | |
| object.element.remove(); | |
| } | |
| } ); | |
| } ); | |
| } | |
| 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: { style: '' }, | |
| objects: new WeakMap() | |
| }; | |
| const domElement = parameters.element !== undefined ? parameters.element : document.createElement( 'div' ); | |
| domElement.style.overflow = 'hidden'; | |
| this.domElement = domElement; | |
| const viewElement = document.createElement( 'div' ); | |
| viewElement.style.transformOrigin = '0 0'; | |
| viewElement.style.pointerEvents = 'none'; | |
| domElement.appendChild( viewElement ); | |
| const cameraElement = document.createElement( 'div' ); | |
| cameraElement.style.transformStyle = 'preserve-3d'; | |
| viewElement.appendChild( cameraElement ); | |
| this.getSize = function () { | |
| return { | |
| width: _width, | |
| height: _height | |
| }; | |
| }; | |
| this.render = function ( scene, camera ) { | |
| const fov = camera.projectionMatrix.elements[ 5 ] * _heightHalf; | |
| if ( camera.view && camera.view.enabled ) { | |
| // view offset | |
| viewElement.style.transform = `translate( ${ - camera.view.offsetX * ( _width / camera.view.width ) }px, ${ - camera.view.offsetY * ( _height / camera.view.height ) }px )`; | |
| // view fullWidth and fullHeight, view width and height | |
| viewElement.style.transform += `scale( ${ camera.view.fullWidth / camera.view.width }, ${ camera.view.fullHeight / camera.view.height } )`; | |
| } else { | |
| viewElement.style.transform = ''; | |
| } | |
| 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 scaleByViewOffset = camera.view && camera.view.enabled ? camera.view.height / camera.view.fullHeight : 1; | |
| const cameraCSSMatrix = camera.isOrthographicCamera ? | |
| `scale( ${ scaleByViewOffset } )` + 'scale(' + fov + ')' + 'translate(' + epsilon( tx ) + 'px,' + epsilon( ty ) + 'px)' + getCameraCSSMatrix( camera.matrixWorldInverse ) : | |
| `scale( ${ scaleByViewOffset } )` + 'translateZ(' + fov + 'px)' + getCameraCSSMatrix( camera.matrixWorldInverse ); | |
| const perspective = camera.isPerspectiveCamera ? 'perspective(' + fov + 'px) ' : ''; | |
| const style = perspective + 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'; | |
| viewElement.style.width = width + 'px'; | |
| viewElement.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 hideObject( object ) { | |
| if ( object.isCSS3DObject ) object.element.style.display = 'none'; | |
| for ( let i = 0, l = object.children.length; i < l; i ++ ) { | |
| hideObject( object.children[ i ] ); | |
| } | |
| } | |
| function renderObject( object, scene, camera, cameraCSSMatrix ) { | |
| if ( object.visible === false ) { | |
| hideObject( object ); | |
| return; | |
| } | |
| if ( object.isCSS3DObject ) { | |
| const visible = ( object.layers.test( camera.layers ) === true ); | |
| const element = object.element; | |
| 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 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 }; | |