GeoJsonPrimitive: Support clamped HeightReference

[donmccurdy]

Description

Allows use of clamped HeightReference options with GeoJsonPrimitive.

Issue number and link

n/a

Testing plan

import * as Cesium from "cesium";

const terrain = Cesium.Terrain.fromWorldTerrain();
const viewer = new Cesium.Viewer("cesiumContainer", {terrain});

window.viewer = viewer;

const prim = new Cesium.GeoJsonPrimitive({
  heightReference: Cesium.HeightReference.CLAMP_TO_TERRAIN,
  scene: viewer.scene,
  geoJson:{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            [
              -21.0205342,
              33.4930122
            ],
            [
              -2.452129,
              28.8391351
            ],
            [
              -1.0079093,
              37.5961399
            ],
            [
              -15.872334,
              43.690817
            ],
            [
              -28.0149113,
              41.298494
            ],
            [
              -21.0205342,
              33.4930122
            ]
          ]
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            [
              5.3598656,
              40.6971887
            ],
            [
              5.3598656,
              40.6971887
            ],
            [
              5.3598656,
              40.6971887
            ],
            [
              5.3598656,
              40.6971887
            ]
          ]
        ]
      }
    },
    {
      "type": "Feature",
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            [
              7.0446799311852715,
              38.543931943776784
            ],
            [
              22.660401203559474,
              37.37844114327537
            ],
            [
              19.905181227216417,
              26.68449771610058
            ],
            [
              6.262298933950717,
              27.891271337207428
            ],
            [
              7.0446799311852715,
              38.543931943776784
            ]
          ]
        ]
      }
    },
    {
      "type": "Feature",
      "geometry": {
        "type": "LineString",
        "coordinates": [
          [
            -6.1582405,
            45.4765483
          ],
          [
            3.3412389,
            50.0247762
          ],
          [
            3.4903598,
            43.1650568
          ],
          [
            9.1983068,
            46.6367064
          ],
          [
            10.786459,
            41.6176047
          ],
          [
            23.3025144,
            44.7244527
          ],
          [
            23.0069026,
            40.4267745
          ]
        ]
      }
    }
  ]
}});


viewer.scene.primitives.add(prim);

Author checklist

• I have submitted a Contributor License Agreement
• I have added my name to CONTRIBUTORS.md
• I have updated CHANGES.md with a short summary of my change
• I have added or updated unit tests to ensure consistent code coverage
• I have updated the inline documentation, and included code examples where relevant
• I have performed a self-review of my code

AI acknowledgment

• I used AI to generate content in this PR
• If yes, I have reviewed the AI-generated content before submitting

If yes, I used the following Tools(s) and/or Service(s):

If yes, I used the following Model(s):

[github-actions]

Thank you for the pull request, @donmccurdy!

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