有没有办法为铯多边形显示对角阴影 material

is there a way to display a diagonally hatched material for a Cesium polygon

我正在尝试为 Cesium 多边形创建一个特殊的 material,它必须包含一个带轮廓的阴影区域。 现在,从基础 materials 我可以使用 "Stripe",所以我可以像这样创建我的图形:

var viewer = new Cesium.Viewer('cesiumContainer');
var degrees_array = [
    92.1470732697006,
    21.954465553476467,
    99.08781126987297,
    32.557089696031916,
    68.66765785924682, 
    24.272023818381587
];
var polygon = viewer.entities.add({
    name : 'polygon',
    polygon : {
    hierarchy : Cesium.Cartesian3.fromDegreesArray(degrees_array),
    extrudedHeight: 0,
    material : new Cesium.StripeMaterialProperty(
                {
                    evenColor:Cesium.Color.GRAY,
                    oddColor:Cesium.Color.WHITE,
                    orientation: Cesium.StripeOrientation.HORIZONTAL,
                    repeat:100,
                    offset:0

                }
    ),
            //outline is ignored by WebGL 
            //outline: true,
            //outlineColor:Cesium.Color.BLACK,
            //outlineWidth:1
    }
});
//since designing an outline is not possible with polygon we create a custom polylineGraphics:
var outline_array = degrees_array;
// since loop is not available for polylineGraphics we add the first point positions
outline_array.push(outline_array[0],outline_array[1]);
var outline = viewer.entities.add({
   polyline : {
    positions : Cesium.Cartesian3.fromDegreesArray(outline_array),
    width : 5,
    material : Cesium.Color.GRAY,
    clampToGround:true,
    zIndex:0
   }
});

viewer.zoomTo(polygon)

sandcastle link

我的问题: - 有没有办法旋转条纹,使它们看起来像斜线 - 可以省略条纹 material 的缩放,以便始终以相同的线宽显示吗?

非常感谢!

如果你还在疑惑。您可以使用 stRotation

旋转条纹
  polygon: {
    hierarchy: <posititons>
    stRotation: Cesium.Math.toRadians(45),
    material: stripeMaterial,
  }