upate the heatmap will get a flash

[Ants-double]

I get a flash when i change the data .

[Ants-double]

/ Update/(re)draw the heatmap / CHInstance.prototype.updateLayer = function () { //only works with a Viewer instance since the cesiumWidget instance doesn't contain an entities property if (CesiumHeatmap.defaults.useEntitiesIfAvailable && this._cesium.entities) { // let materialheatmap = Cesium.CallbackProperty(function () { // return new Cesium.ImageMaterialProperty({ // image: this._heatmap._renderer.canvas, // transparent: true // }); // }, false); let tempHeatmapThis=this;

    //let imagetemp=document.getElementById('radarheatmap');
    //imagetemp.src=this._heatmap._renderer.canvas.toDataURL();
    if (this._layer) {
        //this._cesium.entities.remove(this._layer);
        var cesiumairsince = this._cesium.entities.getById('cesiumwindheatmap');
        if (cesiumairsince === undefined) {
            this._layer = this._cesium.entities.add({
                id: 'cesiumwindheatmap',
                show: true,
                rectangle: {
                    coordinates: this._rectangle,
                    material: new Cesium.ImageMaterialProperty({
                        image: new Cesium.CallbackProperty(function (time, result) {
                            return tempHeatmapThis._heatmap._renderer.canvas.toDataURL();
                        }, false),
                        transparent: true
                    })
                }
            });
            return;
        }
        // cesiumairsince.material = new Cesium.ImageMaterialProperty({
        //  image: new Cesium.CallbackProperty(function(time, result) {
        //      return this._heatmap._renderer.canvas;
        //   }, false)})

    } else {

        this._layer = this._cesium.entities.add({
            id: 'cesiumwindheatmap',
            show: true,
            rectangle: {
                coordinates: this._rectangle,
                material: new Cesium.ImageMaterialProperty({
                    image: new Cesium.CallbackProperty(function (time, result) {
                        return tempHeatmapThis._heatmap._renderer.canvas.toDataURL();
                    }, false),
                    transparent: true
                })
            }
        });
    }

    // Work around issue with material rendering in Cesium.
    // material = new Cesium.ImageMaterialProperty({
    //  image: this._heatmap._renderer.canvas,
    // });
    // if (Cesium.VERSION >= "1.21") {
    //  material.transparent = true;
    // } else if (Cesium.VERSION >= "1.16") {
    //  material.alpha = 0.99;
    // }

} else {
    if (this._layer) {
        this._cesium.scene.imageryLayers.remove(this._layer);
    }

    this._layer = this._cesium.scene.imageryLayers.addImageryProvider(CesiumHeatmap._getImageryProvider(this));
}

};

[Ants-double]

i change the material use ,then i is correct