alert(getHeading(Cesium.Cartesian3.fromDegrees(133.0, 30.0), Cesium.Cartesian3.fromDegrees(130.0, 80.0))); // 根据两个坐标点,获取Heading(朝向) function getHeading(pointA, pointB) { //建立以点A为原点,X轴为east,Y轴为north,Z轴朝上的坐标系 const transform = Cesium.Transforms.eastNorthUpToFixedFrame(pointA); //向量AB const positionvector = Cesium.Cartesian3.subtract(pointB, pointA, new Cesium.Cartesian3()); //因transform是将A为原点的eastNorthUp坐标系中的点转换到世界坐标系的矩阵 //AB为世界坐标中的向量 //因此将AB向量转换为A原点坐标系中的向量,需乘以transform的逆矩阵。 const vector = Cesium.Matrix4.multiplyByPointAsVector(Cesium.Matrix4.inverse(transform, new Cesium.Matrix4()), positionvector, new Cesium.Cartesian3()); //归一化 const direction = Cesium.Cartesian3.normalize(vector, new Cesium.Cartesian3()); //heading const heading = Math.atan2(direction.y, direction.x) - Cesium.Math.PI_OVER_TWO; return Cesium.Math.TWO_PI - Cesium.Math.zeroToTwoPi(heading); }
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