GroundPrimitiveRectangleGenerater

Example:

// 1. 创建一个矩形GroundPrimitive生成器
var generater = new Cesium.GroundPrimitiveRectangleGenerater(scene);
// 2. 创建新版场景投放对象
var sceneProject = new Cesium.SceneProjectorEx({
    scene: viewer.scene,
    biasRatio: 10,
    heading: 0,
    pitch: Cesium.Math.toRadians(-90),
    roll: 0,
    nearClipPlane: 10,
    farClipPlane: 500,
    horizontAngle: Cesium.Math.toRadians(70),
    verticalAngle: Cesium.Math.toRadians(55)
});
viewer.scene.primitives.add(sceneProject);
// 3. 获取投影帧数据
var videoFrameData = sceneProject.projectedFrameData;
const projectedFrameData = {
    frameData: {
        width: videoFrameData.frameData.width,
        height: videoFrameData.frameData.height,
        data: videoFrameData.frameData.data
    },
    leftTopCorner: videoFrameData.leftTopCorner,
    leftBottomCorner: videoFrameData.leftBottomCorner,
    rightTopCorner: videoFrameData.rightTopCorner,
    rightBottomCorner: videoFrameData.rightBottomCorner
}
// 4. 使用投影帧数据生成一个GroundPrimitive
var groundPrimitive = generater.generateGroundPrimitive(projectedFrameData, projectedFrameData.frameData);
// 5. 添加到场景中
viewer.scene.primitives.add(groundPrimitive);