Cesium practice - adjust hue, contrast and other parameters, load and render the dark base map

Dark base maps are generally used for large-screen display of 3D maps, and are now a more mainstream form of data representation.

This article realizes a dark base map by adjusting parameters such as layer hue and contrast.

This article includes the core code for rendering dark basemaps, complete code, and online examples.

---

Core code for rendering dark basemap

Put the core code here:

/**
 * @todo 开启暗黑底图
 * @param {Object} options - 参数
 * @param {number} options.hue - 色调
 * @param {number} options.contrast - 对比度
 */
function openDarken(options) {
   
    
    
    options