in cesium1.69,when change 3d to 2d somethins may be blink,below is code
var viewer = new Cesium.Viewer(“cesiumContainer”);
var pointPrimitives1 = viewer.scene.primitives.add(new Cesium.PointPrimitiveCollection());
var x = 120;
var yArr = [50,45,40,35,30,25,20,15,10,5,0,-5,-10,-15,-20,-25,-30]
setInterval(function(){
x+=1;
yArr.forEach(function(item){
var position = Cesium.Cartesian3.fromDegrees(x, item, 2000);
pointPrimitives1.add({
pixelSize: 5,
color: Cesium.Color.RED,
outlineColor: Cesium.Color.BLACK,
outlineWidth: 0,
position: position
});
})
}, 1000);