https://www.caminodelosjesuitas.com/wp-content/plugins/dynamic-con…/renderers/CSS3DRenderer.js?ver=1.11.0

1/**
2 * Based on http://www.emagix.net/academic/mscs-project/item/camera-sync-with-css3-and-webgl-threejs
3 * @author mrdoob / http://mrdoob.com/
4 * @author yomotsu / https://yomotsu.net/
5 */
6
7THREE.CSS3DObject = function ( element ) {
8
9	THREE.Object3D.call( this );
10
11	this.element = element;
12	this.element.style.position = 'absolute';
13	this.element.style.pointerEvents = 'auto';
14
15	this.addEventListener( 'removed', function () {
16
17		this.traverse( function ( object ) {
18
19			if ( object.element instanceof Element && object.element.parentNode !== null ) {
20
21				object.element.parentNode.removeChild( object.element );
22
23			}
24
25		} );
26
27	} );
28
29};
30
31THREE.CSS3DObject.prototype = Object.create( THREE.Object3D.prototype );
32THREE.CSS3DObject.prototype.constructor = THREE.CSS3DObject;
33
34THREE.CSS3DSprite = function ( element ) {
35
36	THREE.CSS3DObject.call( this, element );
37
38};
39
40THREE.CSS3DSprite.prototype = Object.create( THREE.CSS3DObject.prototype );
41THREE.CSS3DSprite.prototype.constructor = THREE.CSS3DSprite;
42
43//
44
45THREE.CSS3DRenderer = function () {
46
47	var _this = this;
48
49	var _width, _height;
50	var _widthHalf, _heightHalf;
51
52	var matrix = new THREE.Matrix4();
53
54	var cache = {
55		camera: { fov: 0, style: '' },
56		objects: new WeakMap()
57	};
58
59	var domElement = document.createElement( 'div' );
60	domElement.style.overflow = 'hidden';
61
62	this.domElement = domElement;
63
64	var cameraElement = document.createElement( 'div' );
65
66	cameraElement.style.WebkitTransformStyle = 'preserve-3d';
67	cameraElement.style.transformStyle = 'preserve-3d';
68	cameraElement.style.pointerEvents = 'none';
69
70	domElement.appendChild( cameraElement );
71
72	var isIE = /Trident/i.test( navigator.userAgent );
73
74	this.getSize = function () {
75
76		return {
77			width: _width,
78			height: _height
79		};
80
81	};
82
83	this.setSize = function ( width, height ) {
84
85		_width = width;
86		_height = height;
87		_widthHalf = _width / 2;
88		_heightHalf = _height / 2;
89
90		domElement.style.width = width + 'px';
91		domElement.style.height = height + 'px';
92
93		cameraElement.style.width = width + 'px';
94		cameraElement.style.height = height + 'px';
95
96	};
97
98	function epsilon( value ) {
99
100		return Math.abs( value ) < 1e-10 ? 0 : value;
101
102	}
103
104	function getCameraCSSMatrix( matrix ) {
105
106		var elements = matrix.elements;
107
108		return 'matrix3d(' +
109			epsilon( elements[ 0 ] ) + ',' +
110			epsilon( - elements[ 1 ] ) + ',' +
111			epsilon( elements[ 2 ] ) + ',' +
112			epsilon( elements[ 3 ] ) + ',' +
113			epsilon( elements[ 4 ] ) + ',' +
114			epsilon( - elements[ 5 ] ) + ',' +
115			epsilon( elements[ 6 ] ) + ',' +
116			epsilon( elements[ 7 ] ) + ',' +
117			epsilon( elements[ 8 ] ) + ',' +
118			epsilon( - elements[ 9 ] ) + ',' +
119			epsilon( elements[ 10 ] ) + ',' +
120			epsilon( elements[ 11 ] ) + ',' +
121			epsilon( elements[ 12 ] ) + ',' +
122			epsilon( - elements[ 13 ] ) + ',' +
123			epsilon( elements[ 14 ] ) + ',' +
124			epsilon( elements[ 15 ] ) +
125		')';
126
127	}
128
129	function getObjectCSSMatrix( matrix, cameraCSSMatrix ) {
130
131		var elements = matrix.elements;
132		var matrix3d = 'matrix3d(' +
133			epsilon( elements[ 0 ] ) + ',' +
134			epsilon( elements[ 1 ] ) + ',' +
135			epsilon( elements[ 2 ] ) + ',' +
136			epsilon( elements[ 3 ] ) + ',' +
137			epsilon( - elements[ 4 ] ) + ',' +
138			epsilon( - elements[ 5 ] ) + ',' +
139			epsilon( - elements[ 6 ] ) + ',' +
140			epsilon( - elements[ 7 ] ) + ',' +
141			epsilon( elements[ 8 ] ) + ',' +
142			epsilon( elements[ 9 ] ) + ',' +
143			epsilon( elements[ 10 ] ) + ',' +
144			epsilon( elements[ 11 ] ) + ',' +
145			epsilon( elements[ 12 ] ) + ',' +
146			epsilon( elements[ 13 ] ) + ',' +
147			epsilon( elements[ 14 ] ) + ',' +
148			epsilon( elements[ 15 ] ) +
149		')';
150
151		if ( isIE ) {
152
153			return 'translate(-50%,-50%)' +
154				'translate(' + _widthHalf + 'px,' + _heightHalf + 'px)' +
155				cameraCSSMatrix +
156				matrix3d;
157
158		}
159
160		return 'translate(-50%,-50%)' + matrix3d;
161
162	}
163
164	function renderObject( object, scene, camera, cameraCSSMatrix ) {
165
166		if ( object instanceof THREE.CSS3DObject ) {
167
168			object.onBeforeRender( _this, scene, camera );
169
170			var style;
171
172			if ( object instanceof THREE.CSS3DSprite ) {
173
174				// http://swiftcoder.wordpress.com/2008/11/25/constructing-a-billboard-matrix/
175
176				matrix.copy( camera.matrixWorldInverse );
177				matrix.transpose();
178				matrix.copyPosition( object.matrixWorld );
179				matrix.scale( object.scale );
180
181				matrix.elements[ 3 ] = 0;
182				matrix.elements[ 7 ] = 0;
183				matrix.elements[ 11 ] = 0;
184				matrix.elements[ 15 ] = 1;
185
186				style = getObjectCSSMatrix( matrix, cameraCSSMatrix );
187
188			} else {
189
190				style = getObjectCSSMatrix( object.matrixWorld, cameraCSSMatrix );
191
192			}
193
194			var element = object.element;
195			var cachedObject = cache.objects.get( object );
196

197			if ( cachedObject === undefined || cachedObject.style !== style ) {
198
199				element.style.WebkitTransform = style;
200				element.style.transform = style;
201
202				var objectData = { style: style };
203
204				if ( isIE ) {
205
206					objectData.distanceToCameraSquared = getDistanceToSquared( camera, object );
207
208				}
209
210				cache.objects.set( object, objectData );
211
212			}
213
214			element.style.display = object.visible ? '' : 'none';
215
216			if ( element.parentNode !== cameraElement ) {
217
218				cameraElement.appendChild( element );
219
220			}
221
222			object.onAfterRender( _this, scene, camera );
223
224		}
225
226		for ( var i = 0, l = object.children.length; i < l; i ++ ) {
227
228			renderObject( object.children[ i ], scene, camera, cameraCSSMatrix );
229
230		}
231
232	}
233
234	var getDistanceToSquared = function () {
235
236		var a = new THREE.Vector3();
237		var b = new THREE.Vector3();
238
239		return function ( object1, object2 ) {
240
241			a.setFromMatrixPosition( object1.matrixWorld );
242			b.setFromMatrixPosition( object2.matrixWorld );
243
244			return a.distanceToSquared( b );
245
246		};
247
248	}();
249
250	function filterAndFlatten( scene ) {
251
252		var result = [];
253
254		scene.traverse( function ( object ) {
255
256			if ( object instanceof THREE.CSS3DObject ) result.push( object );
257
258		} );
259
260		return result;
261
262	}
263
264	function zOrder( scene ) {
265
266		var sorted = filterAndFlatten( scene ).sort( function ( a, b ) {
267
268			var distanceA = cache.objects.get( a ).distanceToCameraSquared;
269			var distanceB = cache.objects.get( b ).distanceToCameraSquared;
270
271			return distanceA - distanceB;
272
273		} );
274
275		var zMax = sorted.length;
276
277		for ( var i = 0, l = sorted.length; i < l; i ++ ) {
278
279			sorted[ i ].element.style.zIndex = zMax - i;
280
281		}
282
283	}
284
285	this.render = function ( scene, camera ) {
286
287		var fov = camera.projectionMatrix.elements[ 5 ] * _heightHalf;
288
289		if ( cache.camera.fov !== fov ) {
290
291			if ( camera.isPerspectiveCamera ) {
292
293				domElement.style.WebkitPerspective = fov + 'px';
294				domElement.style.perspective = fov + 'px';
295
296			} else {
297
298				domElement.style.WebkitPerspective = '';
299				domElement.style.perspective = '';
300
301			}
302
303			cache.camera.fov = fov;
304
305		}
306
307		if ( scene.autoUpdate === true ) scene.updateMatrixWorld();
308		if ( camera.parent === null ) camera.updateMatrixWorld();
309
310		if ( camera.isOrthographicCamera ) {
311
312			var tx = - ( camera.right + camera.left ) / 2;
313			var ty = ( camera.top + camera.bottom ) / 2;
314
315		}
316
317		var cameraCSSMatrix = camera.isOrthographicCamera ?
318			'scale(' + fov + ')' + 'translate(' + epsilon( tx ) + 'px,' + epsilon( ty ) + 'px)' + getCameraCSSMatrix( camera.matrixWorldInverse ) :
319			'translateZ(' + fov + 'px)' + getCameraCSSMatrix( camera.matrixWorldInverse );
320
321		var style = cameraCSSMatrix +
322			'translate(' + _widthHalf + 'px,' + _heightHalf + 'px)';
323
324		if ( cache.camera.style !== style && ! isIE ) {
325
326			cameraElement.style.WebkitTransform = style;
327			cameraElement.style.transform = style;
328
329			cache.camera.style = style;
330
331		}
332
333		renderObject( scene, scene, camera, cameraCSSMatrix );
334
335		if ( isIE ) {
336
337			// IE10 and 11 does not support 'preserve-3d'.
338			// Thus, z-order in 3D will not work.
339			// We have to calc z-order manually and set CSS z-index for IE.
340			// FYI: z-index can't handle object intersection
341			zOrder( scene );
342
343		}
344
345	};
346
347};