gistfile1.txt

// First
this.frustum = new THREE.Frustum();
this.cameraViewProjectionMatrix = new THREE.Matrix4();



// Second
MessageController.sendMessage("app-controller", "add-render-stage", {name: "compute-frustum", stage:function (delta) {

	MessageController.sendMessage("app-controller", "get-camera", function (camera, frustum, viewProjectionMatrix) {
	
		camera.updateMatrixWorld(); // make sure the camera matrix is updated
		camera.matrixWorldInverse.getInverse( camera.matrixWorld );
		viewProjectionMatrix.multiplyMatrices( camera.projectionMatrix, camera.matrixWorldInverse );
		frustum.setFromMatrix( viewProjectionMatrix );
		// frustum is now ready to check all the objects you need
		
	});
	
}});



// Third
MessageController.sendMessage("app-controller", "add-render-stage", {name: planet.uuid, stage:function (object) {
	

	var geometry = new THREE.CubeGeometry( 1, 1, 1 );
	var material = new THREE.MeshBasicMaterial( {color: 0x00ff00} );
	var placeHolder = new THREE.Mesh( geometry, material );
	placeHolder.position = object.position;
	
	MessageController.sendMessage("app-controller", "add-object-to-scene", placeHolder);
	
	return function (delta) {
		MessageController.sendMessage("app-controller", "get-camera", function (camera, frustum, viewProjectionMatrix) {
			if (frustum.intersectsObject( placeHolder )) {
				MessageController.sendMessage("app-controller", "add-object-to-scene", object);
			}
			else if (!frustum.intersectsObject( object )){
				placeHolder.position = object.position;
				MessageController.sendMessage("app-controller", "remove-object-from-scene", object);
			}
		});
	}
	
	
}(planet)});