本节我们学习使用instance着色器进行着色

    //拾取
    var handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
    handler.setInputAction(function(movement){
      console.log(movement);
      var pickedObject = viewer.scene.pick(movement.position);
      if(Cesium.defined(pickedObject)){
        console.log(pickedObject.id);
      }
    },Cesium.ScreenSpaceEventType.LEFT_CLICK);

    //使用instance的颜色去着色
    let material = new Cesium.Material({
      fabric:{
        type:"Color",
        uniforms:{
          color: new Cesium.Color(1.0,0.0,0.0,0.5)
        }
      }
    })

完成后保存并运行我们就可以得到透明红色区域了