cesium实现暗色地图

• 假设你已经初始化了viewer

<script>

function setBlackMap(){

    modifyMap(viewer, {
          //反色?
          invertColor: true,
          brightness: 0.5,
          // invertColor: true,
          //滤镜值
          // filterRGB: [136,162,172],
          filterRGB: [90,122,172],
          hue:0.5,
          gamma:0.3,
          contrast:1.5,
          saturation:0,
          color:'rgb(72,101,172)',
          //filterRGB: [60, 145, 172]rgb(22 39 73)
        });
}
 

 function modifyMap(viewer, options) {
    const baseLayer = viewer.imageryLayers.get(0)
    //以下几个参数根据实际情况修改,目前我是参照火星科技的参数,个人感觉效果还不错
    baseLayer.brightness = options.brightness || 0.6
    baseLayer.contrast = options.contrast || 1.8
    baseLayer.gamma = options.gamma || 0.3
    baseLayer.hue = options.hue || 1
    baseLayer.saturation = options.saturation || 0
    const baseFragShader = (viewer.scene.globe)._surfaceShaderSet
        .baseFragmentShaderSource.sources
    for (let i = 0; i < baseFragShader.length; i++) {
      const strS = 'color = czm_saturation(color, textureSaturation);\n#endif\n'
      let strT = 'color = czm_saturation(color, textureSaturation);\n#endif\n'
      if (options.invertColor) {
        strT += `
      color.r = 1.0 - color.r;
      color.g = 1.0 - color.g;
      color.b = 1.0 - color.b;
      `
      }
      if (options.filterRGB.length > 0) {
        strT += `
      color.r = color.r * ${options.filterRGB[0]}.0/255.0;
      color.g = color.g * ${options.filterRGB[1]}.0/255.0;
      color.b = color.b * ${options.filterRGB[2]}.0/255.0;
      `
      }
      baseFragShader[i] = baseFragShader[i].replace(strS, strT)
    }
  }

 </script>

• 摘自https://blog.csdn.net/LBY_XK/article/details/129354789