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