@nsc-earth-v2/zoom-control

A zoom controller widget for Cesium, which is an npm package that can be used with Cesium. 中文 Readme

Features

• Zoom in, Zoom out and Reset zoom functionality.

Installation

Install it via npm:

npm install @nsc-earth-v2/zoom-control

Usage

Importing the module

import ZoomController from "@nsc-earth-v2/zoom-control";

Creating an instance of the widget

const viewer = new Cesium.Viewer("cesiumContainer");
const zoomController = new ZoomController(viewer, {
  container: document.getElementById("myContainer"),
  home: new Cesium.Cartesian3.fromDegrees(-98.57, 39.82, 5000000),
});

The constructor of ZoomController takes two arguments:

• viewer: A required parameter representing the instance of the Cesium Viewer.
• options: An optional object containing following properties:
  • container: An optional property representing the HTML element where the widget needs to be added to.
  • home: An optional property representing the Cartesian3 position to which the camera should fly back when reset zoom button is clicked.
  • tips: An optional property representing an object containing text messages to display as tooltip for the buttons.Defaults to { zoomIn: 'Zoom In', zoomOut: 'Zoom Out', refresh: 'Reset Zoom' }

Using the widget methods

Once you have created an instance of ZoomController, you can access the following methods:

• show(): To show the widget.
• hide(): To hide the widget.
• destroy(): To destroy the widget.