Cesium Overriding Methods

Cesium Overriding Methods.markdown

Cesium Overriding Methods ('-' * 25) Just setting up a simple Cesium viewer.

A Pen by Michael Lodge-Paolini on CodePen.

License.

index.html

<div id="cesiumContainer" class="fullScreen"><div>

script.js

   //https://groups.google.com/forum/#!topic/cesium-dev/_9lVzDBZ--c
   var testInstanceId = 'FindME';
   var viewer = new Cesium.Viewer('cesiumContainer', {});
   var primitives = viewer.scene.primitives;

   //Override primitive collection
   primitives.contains = function(searchFor) {
     //custom find code
     for (var i = 0; i < this._primitives.length; i++) {
       if (this._primitives[i].geometryInstances.id === searchFor) {
         return true;
       }
     }

     //custom find did not find anything so check original contains
     return Cesium.PrimitiveCollection.prototype.contains.call(this, searchFor);
   };

   var primTest = new Cesium.Primitive({
     geometryInstances: new Cesium.GeometryInstance({
       id: testInstanceId,
       geometry: Cesium.BoxGeometry.fromDimensions({
         vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
         dimensions: new Cesium.Cartesian3(400000.0, 300000.0, 500000.0)
       }),
       modelMatrix: Cesium.Matrix4.multiplyByTranslation(
         Cesium.Transforms.eastNorthUpToFixedFrame(Cesium.Cartesian3.fromDegrees(-105.0, 45.0)),
         new Cesium.Cartesian3(0.0, 0.0, 250000), new Cesium.Matrix4()),
       attributes: {
         color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.RED.withAlpha(0.5))
       }
     }),
     appearance: new Cesium.PerInstanceColorAppearance({
       closed: true
     })
   });
   primitives.add(new Cesium.Primitive({
     geometryInstances: new Cesium.GeometryInstance({
       geometry: new Cesium.RectangleGeometry({
         rectangle: Cesium.Rectangle.fromDegrees(-100.0, 30.0, -93.0, 37.0),
         height: 100000,
         vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT
       }),
       attributes: {
         color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.BLUE)
       }
     }),
     appearance: new Cesium.PerInstanceColorAppearance()
   }));
   primitives.add(primTest);

   var found = primitives.contains(testInstanceId);
   console.log('Found by InstanceId: ' + found);

   found = primitives.contains('notThere');
   console.log('Found by InstanceId: ' + found);

   found = primitives.contains(primTest);
   console.log('Found by Primitive: ' + found);

style.css

.fullScreen {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  border: none;
  width: 100%;
  height: 100%;
}