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mobile-query-three-vendor-three.js-renderers-CSS3DRenderer.js / js



  
Based on http://www.emagix.net/academic/mscs-project/item/camera-sync-with-css3-and-webgl-threejs
author: mrdoob / mrdoob.com/

  
  
  THREE.CSS3DObject = function ( element ) {
  
          THREE.Object3D.call( this );
  
          this.element = element;
          this.element.style.position = "absolute";
          this.element.style.WebkitTransformStyle = 'preserve-3d';
          this.element.style.MozTransformStyle = 'preserve-3d';
          this.element.style.oTransformStyle = 'preserve-3d';
          this.element.style.transformStyle = 'preserve-3d';
  
  };
  
  THREE.CSS3DObject.prototype = Object.create( THREE.Object3D.prototype );
  
  THREE.CSS3DSprite = function ( element ) {
  
          THREE.CSS3DObject.call( this, element );
  
  };
  
  THREE.CSS3DSprite.prototype = Object.create( THREE.CSS3DObject.prototype );
  
  //
  
  THREE.CSS3DRenderer = function () {
  
          console.log( 'THREE.CSS3DRenderer', THREE.REVISION );
  
          var _width, _height;
          var _widthHalf, _heightHalf;
          var _projector = new THREE.Projector();
  
          var _tmpMatrix = new THREE.Matrix4();
  
          this.domElement = document.createElement( 'div' );
  
          this.domElement.style.overflow = 'hidden';
  
          this.domElement.style.WebkitTransformStyle = 'preserve-3d';
          this.domElement.style.WebkitPerspectiveOrigin = '50% 50%';
  
          this.domElement.style.MozTransformStyle = 'preserve-3d';
          this.domElement.style.MozPerspectiveOrigin = '50% 50%';
  
          this.domElement.style.oTransformStyle = 'preserve-3d';
          this.domElement.style.oPerspectiveOrigin = '50% 50%';
  
          this.domElement.style.transformStyle = 'preserve-3d';
          this.domElement.style.perspectiveOrigin = '50% 50%';
  
          // TODO: Shouldn't it be possible to remove cameraElement?
  
          this.cameraElement = document.createElement( 'div' );
  
          this.cameraElement.style.WebkitTransformStyle = 'preserve-3d';
          this.cameraElement.style.MozTransformStyle = 'preserve-3d';
          this.cameraElement.style.oTransformStyle = 'preserve-3d';
          this.cameraElement.style.transformStyle = 'preserve-3d';
  
          this.domElement.appendChild( this.cameraElement );
  
          this.setSize = function ( width, height ) {
  
                  _width = width;
                  _height = height;
  
                  _widthHalf = _width / 2;
                  _heightHalf = _height / 2;
  
                  this.domElement.style.width = width + 'px';
                  this.domElement.style.height = height + 'px';
  
                  this.cameraElement.style.width = width + 'px';
                  this.cameraElement.style.height = height + 'px';
  
          };
  
          var epsilon = function ( value ) {
  
                  return Math.abs( value ) < 0.000001 ? 0 : value;
  
          };
  
          var getCameraCSSMatrix = function ( matrix ) {
  
                  var 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 ] ) +
                  ')';
  
          }
  
          var getObjectCSSMatrix = function ( matrix ) {
  
                  var elements = matrix.elements;
  
                  return 'translate3d(-50%,-50%,0) 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 ] ) +
                  ')';
  
          }
  
          this.render = function ( scene, camera ) {
  
                  var fov = 0.5 / Math.tan( THREE.Math.degToRad( camera.fov * 0.5 ) ) * _height;
  
                  this.domElement.style.WebkitPerspective = fov + "px";
                  this.domElement.style.MozPerspective = fov + "px";
                  this.domElement.style.oPerspective = fov + "px";
                  this.domElement.style.perspective = fov + "px";
  
                  var objects = _projector.projectScene( scene, camera, false ).objects;
  
                  var style = "translate3d(0,0," + fov + "px)" + getCameraCSSMatrix( camera.matrixWorldInverse ) + " translate3d(" + _widthHalf + "px," + _heightHalf + "px, 0)";
  
                  this.cameraElement.style.WebkitTransform = style;
                  this.cameraElement.style.MozTransform = style;
                  this.cameraElement.style.oTransform = style;
                  this.cameraElement.style.transform = style;
  
                  for ( var i = 0, il = objects.length; i < il; i ++ ) {
  
                          var object = objects[ i ].object;
  
                          if ( object instanceof THREE.CSS3DObject ) {
  
                                  var element = object.element;
  
                                  if ( object instanceof THREE.CSS3DSprite ) {
  
                                          // http://swiftcoder.wordpress.com/2008/11/25/constructing-a-billboard-matrix/
  
  					_tmpMatrix.copy( camera.matrixWorldInverse );
                                          _tmpMatrix.transpose();
                                          _tmpMatrix.extractPosition( object.matrixWorld );
                                          _tmpMatrix.scale( object.scale );
  
                                          _tmpMatrix.elements[ 3 ] = 0;
                                          _tmpMatrix.elements[ 7 ] = 0;
                                          _tmpMatrix.elements[ 11 ] = 0;
                                          _tmpMatrix.elements[ 15 ] = 1;
  
                                          style = getObjectCSSMatrix( _tmpMatrix );
  
                                  } else {
  
                                          style = getObjectCSSMatrix( object.matrixWorld );
  
                                  }
  
                                  /*
                                  element.style.WebkitBackfaceVisibility = 'hidden';
                                  element.style.MozBackfaceVisibility = 'hidden';
                                  element.style.oBackfaceVisibility = 'hidden';
                                  element.style.backfaceVisibility = 'hidden';
  				*/
  
                                  element.style.WebkitTransform = style;
                                  element.style.MozTransform = style;
                                  element.style.oTransform = style;
                                  element.style.transform = style;
  
                                  if ( element.parentNode !== this.cameraElement ) {
  
                                          this.cameraElement.appendChild( element );
  
                                  }
  
                          }
  
                  }
  
          };
  
  };
  


(C) Æliens 04/09/2009

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