Time-varying height in CZML

CesiumJS
1

Hi!

Lets say I have a czml file with a polygon that looks like this:

{
    "polygon": {
        "positions": {
            "cartographicDegrees": [
                10,
                50,
                0,
                10.001,
                50.001,
                5,
                10.002,
                50.001,
                10
            ]  
        },
        "perPositionHeight": true
    }
}

What I would like to do, is to vary the height of the polygon over time, but I want the polygon’s shape to remain exactly the same, I only want to move it around in the terrain. Something like the following would have been ideal:


{
    "polygon": {
        "positions": {
            "cartographicDegrees": [
                10,
                50,
                0,
                10.001,
                50.001,
                5,
                10.002,
                50.001,
                10
            ]  
        },
        "perPositionHeight": true,
        "heightOffset": [
            {
              "interval": "2021-09-22T07:00:00Z/2021-09-22T08:00:00Z",
              "number": 1
            },
            {
              "interval": "2021-09-22T08:00:00Z/2021-09-22T09:00:00Z",
              "number": 2
            },
            {
              "interval": "2021-09-22T09:00:00Z/2021-09-22T10:00:00Z",
              "number": 3
            }
        ]
    }
}

Is this possible? Because the only solution I can see now, is to rewrite the entire polygon with different heights for every interval. And obviously, this is not scalable for large structures.

Thanks alot for any help!

2

Sounds like this, but good luck!

1 Like
3

@hakon thank you for the question!

@mhernandez624 this looks appropriate to me - @hakon be sure to give this a try :+1: