Change line width on Cesium.RectangleOutlineGeometry

[nancyls...@gmail.com]

I am using Chrome 80 Windows 10 with Cesium 1.55.

My code draws a rectangle and then a rectangle outline.  I want the outline line thicker.  It is very thin.  Want a translucent rectangle with thicker outline.  Any suggestions.

    const instance = new Cesium.GeometryInstance({

      geometry: new Cesium.RectangleGeometry({

        rectangle: rect,

        vertexFormat : Cesium.EllipsoidSurfaceAppearance.VERTEX_FORMAT

      }),

      attributes: {

        color: new Cesium.ColorGeometryInstanceAttribute.fromColor(color)

      }

    });

    const rectanglePrimitive = this.rectangleCollection.add(new Cesium.Primitive({     

      geometryInstances: instance,

      appearance: new Cesium.EllipsoidSurfaceAppearance({

        material: new Cesium.Material({

          fabric: {

            type: 'Color',

            uniforms: {

              color: color

            }

          }

        })

      }),

      asynchronous: false

    }));

    const outline = new Cesium.GeometryInstance({

      geometry: new Cesium.RectangleOutlineGeometry({

        rectangle: this.rectangle,

        vertexFormat : Cesium.PerInstanceColorAppearance.VERTEX_FORMAT

      }),

      attributes: {

        color: new Cesium.ColorGeometryInstanceAttribute.fromColor(color),

      }

    });

    const outlinePrimitive = this.rectangleCollection.add(new Cesium.Primitive({

      geometryInstances: outline,

      appearance: new Cesium.PerInstanceColorAppearance({

        closed: true,

        translucent : false,

        renderState : {

          depthTest : {

              enabled : true

          },

          lineWidth : Math.min(4.0, this.geoIntViewer.scene.maximumAliasedLineWidth)  ===>  I made this number bigger and no changes?

        }

      })

    }));

[Omar Shehata]

Setting line thickness isn't supported on Windows. See details here: https://github.com/CesiumGS/cesium/issues/8577