Error in adding billboard with different alignedAxis to the same BillboardCollection

[hpinkos]

reported here: https://groups.google.com/forum/#!topic/cesium-dev/e4sSCMrEmOw

var viewer = new Cesium.Viewer('cesiumContainer');
var pinBuilder = new Cesium.PinBuilder();
viewer.entities.add({
    position : Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),
    billboard :{
        image : pinBuilder.fromColor(Cesium.Color.ROYALBLUE, 48).toDataURL(),
        verticalOrigin : Cesium.VerticalOrigin.BOTTOM,
        rotation: 0.0,
        alignedAxis: Cesium.Cartesian3.ZERO // should point to top of the screen
    }
});
viewer.entities.add({
    position : Cesium.Cartesian3.fromDegrees(-93.0, 37.0),
    billboard : {
        image : pinBuilder.fromColor(Cesium.Color.RED, 48).toDataURL(),
        verticalOrigin : Cesium.VerticalOrigin.BOTTOM,
        rotation: 0.0,
        alignedAxis: Cesium.Cartesian3.UNIT_Z // should point North
    }
});

[hpinkos]

Are all billboards in an EntityCollection being added to the same BillboardCollection? If so, that's the cause of the problem. The billboards behave as expected when each one is added to it's own BillboardCollection.

[mramato]

Yes, they all go in the same collection, which should be supported. So this is a BillboardCollection bug.