Primitive ordering regression

[hpinkos]

In Cesium 1.29, the using raiseToTop makes the polyline render on top of the billboard and label. However, in Cesium 1.30 this is no longer the case.

Reported by @erezy

https://groups.google.com/forum/#!topic/cesium-dev/ywyFR5GSi_c

var viewer = new Cesium.Viewer('cesiumContainer',{
    sceneMode: Cesium.SceneMode.SCENE2D 
});

var polylines = new Cesium.PolylineCollection();
polylines.add({
  positions : Cesium.Cartesian3.fromDegreesArray([
    -75.10, 39.57,
    -77.02, 38.53,
    -80.50, 35.14,
    -80.12, 25.46]),
  width : 2,
   material : new Cesium.Material({
    fabric : {
        type : 'Color',
        uniforms : {
            color : new Cesium.Color(1.0, 1.0, 0.0, 1.0)
        }
    }
})
});

var billboards = new Cesium.BillboardCollection();
billboards.add({
  position : Cesium.Cartesian3.fromDegrees(-77.02, 38.53),
  image : '../images/Cesium_Logo_overlay.png'
});
var labels = new Cesium.LabelCollection();
labels.add({
  position : Cesium.Cartesian3.fromDegrees(-80.50, 35.14),
    text : 'A label',
    fillColor: Cesium.Color.BLUE
});

var primitives = viewer.scene.primitives;
primitives.add(labels);
primitives.add(billboards);  // Add collection
primitives.add(polylines);

primitives.raiseToTop(polylines);

[erezy]

Hi @hpinkos ,
do you have news on this issue? are you still working on it?

[hpinkos]

@erezy no sorry, we haven't had a chance to look into this. I'm guessing the regression came with this PR: #4886