cesium设置动态属性

中文文档地址

http://cesium.xin/cesium/cn/Documentation1.62/ColorMaterialProperty.html?classFilter=ColorMaterialProperty

点闪动

注意黄色代码部分，一定要加，否则属性会一直处于动态属性状态，一直处于计算状态

        entity.billboard.scale = new Cesium.CallbackProperty(function () {
          const currentTime = Cesium.JulianDate.secondsDifference(
            store.viewer!.clock.currentTime,
            Cesium.JulianDate.fromDate(new Date(0))
          )
          flashingNum === 0 && (flashingNum = Math.floor(currentTime / Math.PI))
          // console.log('flashingNum', flashingNum, 'currentTime / Math.PI', currentTime / Math.PI, 'Math.floor(currentTime / Math.PI) - flashingNum', Math.floor(currentTime / Math.PI) - flashingNum)
          const scale =
            Math.floor(currentTime / Math.PI) - flashingNum > 1
              ? 1
              : Math.abs(Math.sin(currentTime * 3))
          console.log('currentTime', currentTime, 'flashingNum', flashingNum, 'scale', scale)
          if (scale >= 1 && entity.billboard) {
            entity.billboard.scale = 1.3 as any
          }
          return scale
        }, false)

 

闪动的线条

        entity.polyline.material = new Cesium.ColorMaterialProperty(
          new Cesium.CallbackProperty(function () {
            const currentTime = Cesium.JulianDate.secondsDifference(
              store.viewer!.clock.currentTime,
              Cesium.JulianDate.fromDate(new Date(0))
            )
            flashingNum === 0 && (flashingNum = Math.floor(currentTime / Math.PI))
            const alpha =
              Math.floor(currentTime / Math.PI) - flashingNum > 1
                ? 1
                : Math.abs(Math.sin(currentTime * 3))
            // console.log('currentTime', currentTime, 'flashingNum', flashingNum, 'alpha', alpha)
            const color = Cesium.Color.fromCssColorString(`rgba(173,181,21,${alpha})`)
            if (alpha >= 1 && entity.polyline) {
              entity.polyline.material = new Cesium.ColorMaterialProperty(color)
            }
            return color
          }, false)