没有关闭PointPrimitive的深度写入:

关闭了PointPrimitive的深度写入:

 if (pointPrimitiveCollection._rsOpaque) {pointPrimitiveCollection._rsOpaque = Cesium.RenderState.fromCache({depthTest: {enabled: false,}});}

 const p = pointPrimitiveCollection.add({position: cartesian,pixelSize: 50,color: Cesium.Color.RED})// 还是会深度写入,只不过写入的是-1         p.disableDepthTestDistance = Number.POSITIVE_INFINITY;