how can I specify the height of a line using scene.primitive.add()?

CesiumJS
1

I tied this:
var polylines = scene.primitives.add(new Cesium.PolylineCollection());
  var polyline2 = polylines.add({
        positions : Cesium.PolylinePipeline.generateCartesianArc({
            positions : Cesium.Cartesian3.fromDegreesArrayHeights([-75, 39, 250000,-125, 39, 0]),
        }),
        width : 2.0
    });

But the height parameter does not work. Any solution except doing this by viewer.entities.add()?

2

Hi there,

Polylines do not use the height parameter.

Instead, the polyline positions are 3D points, so you can give your lines height by specifying a height for each point. See our polyline code example: http://cesiumjs.org/Cesium/Apps/Sandcastle/index.html?src=Polyline.html&label=Showcases

Hope thatt helps,

  • Rachel
3

在 2017年7月5日星期三 UTC+8上午9:19:31，Rachel Hwang写道：

Hi there,

Polylines do not use the height parameter.

Instead, the polyline positions are 3D points, so you can give your lines height by specifying a height for each point. See our polyline code example: http://cesiumjs.org/Cesium/Apps/Sandcastle/index.html?src=Polyline.html&label=Showcases

Hope thatt helps,
- Rachel

Thanks for your advice. If I follow the example code, I have no idea how to pass a self-defined fabric to a entity's material? It seems only a few functions like PolylineOutlineMaterialProperty, PolylineArrowMaterialProperty, etc. work. But none of them support a self-defined fabric.