scene.sampleHeight get wrong result when frequently call multi times.

[dminor112]

Browser: electron
I try to get some points,s height on the b3dm model.
My code:

(function(){
    let angleToRadian = function (angle) {
      return angle * Math.PI / 180
    }
    let cartographicPosition = new Cesium.Cartographic()
    // bounds of a rectangle
    let latlng = {
        lng: 114.89866264972603,
        lat: 22.78452730869603
    }
    let latlng1 = {
        lng: 114.89915774594768,
        lat: 22.78440290231223
    }
    let lngOffset = (latlng1.lng - latlng.lng) / 10
    let latOffset = (latlng1.lat - latlng.lat) / 10
    console.log('haha', lngOffset, latOffset)
    // get 100 points of the react
    for(let i = 0; i < 10; i++){
        let lng = latlng.lng + lngOffset * i
        for(let j = 0; j < 10; j++){
            let lat = latlng.lat + latOffset * j
            let flag = lng >= latlng.lng && lng <= latlng1.lng && lat >= latlng1.lat && lat <= latlng.lat
            cartographicPosition.longitude = angleToRadian(lng)
            cartographicPosition.latitude = angleToRadian(lat)
            let t1 = Date.now()
            let h = cesiumManager.cesiumViewer.scene.sampleHeight(cartographicPosition)
            console.log('====>', h, flag, Date.now() - t1, lat, lng, 'i:' + i, 'j:' + j)
        }
    }
})()

got results(only first six got correct height):

Then I change the loop j to for(let j = 6; j < 10; j++), got result:

No metter how many times I called scene.sampleHeight, only the first six times got result.

[hpinkos]

@lilleyse any ideas?

[lilleyse]

@dminor112 this might be a long shot but can you try this branch #7289?

[ggetz]

Closing this issue due to lack of activity.