Draw polygons problem

CesiumJS
1

When drawing polygon，encounter a problem.

This are codes!

image
image801×710 66.7 KB

This the result!

image
image770×769 64.7 KB

If i change the height,as shown below,

image
image844×682 68.7 KB

the result was expected,

image
image1087×956 91.5 KB

The test is on Sandcastle.

What’s wrong with me when i drawing the polygon?

2

You could use a wall instead of a polygon. Outlining using polylines for top and bottom could be an alternative if you don’t like the way wall outlines are drawn.

Scott


var entity = viewer.entities.add({
    name: 'polyline',
    wall: {
        positions: Cesium.Cartesian3.fromDegreesArrayHeights([
            116.749187, 40.369242, 70.0,
            116.751102, 40.369245, 70.0,
            116.751006, 40.368598, 70.0,
            116.750557, 40.368527, 70.0,
            116.750174, 40.368756, 70.0
        ]),
        minimumHeights: [30.0, 30.0, 30.0, 30.0, 30.0],
        fill: true,
        material: Cesium.Color.CYAN.withAlpha(0.5),
        outline: true,
        outlineColor: Cesium.Color.BLACK
        },
});

viewer.zoomTo(viewer.entities);
2 Likes
3

@scottUFR

Thank you very much for the suggestion! You are spot-on - @osbornyb please give this a try :rocket:

-Sam

4

Thank you very very much!
I have tried the wall,and it worked.But in the future,i want to realize hook face,like the picture below.
1635241972(1)
Maybe the hook face is not supported by the wall.

5

ModelGraphics might be the way to go unless you have the appetite for something more direct by implementing a custom primitive. The *Graphics classes correspond to GIS geometries rather than generic “graphics” geometries.

1 Like