ClippingPolygon

Examples:

const positions = Cesium.Cartesian3.fromRadiansArray([
    -1.3194369277314022,
    0.6988062530900625,
    -1.31941,
    0.69879,
    -1.3193955980204217,
    0.6988091578771254,
    -1.3193931220959367,
    0.698743632490865,
    -1.3194358224045408,
    0.6987471965556998,
]);

const polygon = new Cesium.ClippingPolygon({
    positions: positions
});

// A clipping polygon with two holes. Regions inside the holes are not clipped.
const outerRing = Cesium.Cartesian3.fromDegreesArray([
    -100.0, 40.0,
    -90.0, 40.0,
    -90.0, 50.0,
    -100.0, 50.0,
]);

const firstHole = Cesium.Cartesian3.fromDegreesArray([
    -98.0, 42.0,
    -96.0, 42.0,
    -96.0, 44.0,
    -98.0, 44.0,
]);

const secondHole = Cesium.Cartesian3.fromDegreesArray([
    -94.0, 46.0,
    -92.0, 46.0,
    -92.0, 48.0,
    -94.0, 48.0,
]);

const polygonWithHoles = new Cesium.ClippingPolygon({
    positions: outerRing,
    holes: [firstHole, secondHole],
});