Doodle3D-Slicer/three.js-master/examples/js/renderers/CSS3DRenderer.js
2015-06-12 15:58:26 +02:00

246 lines
5.7 KiB
JavaScript
Executable File

/**
* Based on http://www.emagix.net/academic/mscs-project/item/camera-sync-with-css3-and-webgl-threejs
* @author mrdoob / http://mrdoob.com/
*/
THREE.CSS3DObject = function ( element ) {
THREE.Object3D.call( this );
this.element = element;
this.element.style.position = 'absolute';
this.addEventListener( 'removed', function ( event ) {
if ( this.element.parentNode !== null ) {
this.element.parentNode.removeChild( this.element );
}
} );
};
THREE.CSS3DObject.prototype = Object.create( THREE.Object3D.prototype );
THREE.CSS3DObject.prototype.constructor = THREE.CSS3DObject;
THREE.CSS3DSprite = function ( element ) {
THREE.CSS3DObject.call( this, element );
};
THREE.CSS3DSprite.prototype = Object.create( THREE.CSS3DObject.prototype );
THREE.CSS3DSprite.prototype.constructor = THREE.CSS3DSprite;
//
THREE.CSS3DRenderer = function () {
console.log( 'THREE.CSS3DRenderer', THREE.REVISION );
var _width, _height;
var _widthHalf, _heightHalf;
var matrix = new THREE.Matrix4();
var cache = {
camera: { fov: 0, style: '' },
objects: {}
};
var domElement = document.createElement( 'div' );
domElement.style.overflow = 'hidden';
domElement.style.WebkitTransformStyle = 'preserve-3d';
domElement.style.MozTransformStyle = 'preserve-3d';
domElement.style.oTransformStyle = 'preserve-3d';
domElement.style.transformStyle = 'preserve-3d';
this.domElement = domElement;
var cameraElement = document.createElement( 'div' );
cameraElement.style.WebkitTransformStyle = 'preserve-3d';
cameraElement.style.MozTransformStyle = 'preserve-3d';
cameraElement.style.oTransformStyle = 'preserve-3d';
cameraElement.style.transformStyle = 'preserve-3d';
domElement.appendChild( cameraElement );
this.setClearColor = function () {
};
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';
};
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 ] ) +
')';
};
var renderObject = function ( object, camera ) {
if ( object instanceof THREE.CSS3DObject ) {
var style;
if ( object instanceof THREE.CSS3DSprite ) {
// http://swiftcoder.wordpress.com/2008/11/25/constructing-a-billboard-matrix/
matrix.copy( camera.matrixWorldInverse );
matrix.transpose();
matrix.copyPosition( object.matrixWorld );
matrix.scale( object.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 );
}
var element = object.element;
var cachedStyle = cache.objects[ object.id ];
if ( cachedStyle === undefined || cachedStyle !== style ) {
element.style.WebkitTransform = style;
element.style.MozTransform = style;
element.style.oTransform = style;
element.style.transform = style;
cache.objects[ object.id ] = style;
}
if ( element.parentNode !== cameraElement ) {
cameraElement.appendChild( element );
}
}
for ( var i = 0, l = object.children.length; i < l; i ++ ) {
renderObject( object.children[ i ], camera );
}
};
this.render = function ( scene, camera ) {
var fov = 0.5 / Math.tan( THREE.Math.degToRad( camera.fov * 0.5 ) ) * _height;
if ( cache.camera.fov !== fov ) {
domElement.style.WebkitPerspective = fov + "px";
domElement.style.MozPerspective = fov + "px";
domElement.style.oPerspective = fov + "px";
domElement.style.perspective = fov + "px";
cache.camera.fov = fov;
}
scene.updateMatrixWorld();
if ( camera.parent === undefined ) camera.updateMatrixWorld();
camera.matrixWorldInverse.getInverse( camera.matrixWorld );
var style = "translate3d(0,0," + fov + "px)" + getCameraCSSMatrix( camera.matrixWorldInverse ) +
" translate3d(" + _widthHalf + "px," + _heightHalf + "px, 0)";
if ( cache.camera.style !== style ) {
cameraElement.style.WebkitTransform = style;
cameraElement.style.MozTransform = style;
cameraElement.style.oTransform = style;
cameraElement.style.transform = style;
cache.camera.style = style;
}
renderObject( scene, camera );
};
};