小编typ*_*def的帖子

我使用Cesium的gltf分支,我想显示三维平面模型.为此,我创建了我加载并添加到dataSources的czmlDataSource.

问题是我无法弄清楚如何计算方向四元数以使平面与地面平行,在给定的纬度,lon,alt默认向北(然后影响它们的航向,最终俯仰和滚动).

这是我做的计算我的实际四元数,但3D模型没有正确定向(我不知道如何改变标题,俯仰,滚动):

    var geoPosition = new Cesium.Cartographic(Cesium.Math.toRadians(inputPosition.lon), Cesium.Math.toRadians(inputPosition.lat), inputPosition.alt);
    var cartesianPosition = Cesium.Ellipsoid.WGS84.cartographicToCartesian(geoPosition);

    var euler = [cartesianPosition.x, cartesianPosition.y, cartesianPosition.z];
    var qx = Cesium.Quaternion.fromAxisAngle(Cesium.Cartesian3.UNIT_X, euler[0]);
    var qy = Cesium.Quaternion.fromAxisAngle(Cesium.Cartesian3.UNIT_Y, euler[1]);
    var qz = Cesium.Quaternion.fromAxisAngle(Cesium.Cartesian3.UNIT_Z, euler[2]);
    var qt = Cesium.Quaternion.multiply(qz, qy);
    var q = Cesium.Quaternion.multiply(qt, qx);
    Cesium.Quaternion.normalize(q, q);

var czmlSrc = [{
       "orientation": {
            "epoch": "2012-08-04T16:00:00Z",
            "interpolationAlgorithm": "LINEAR",
            "interpolationDegree": 1,
            "unitQuaternion": [0, q.x,q.y,q.z,q.w,
                            3600, q.x,q.y,q.z,q.w]
        }
   }];