mirror of
https://github.com/jiawanlong/Cesium-Examples.git
synced 2025-11-04 01:04:17 +00:00
168 lines
6.0 KiB
HTML
168 lines
6.0 KiB
HTML
<!--********************************************************************
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* by jiawanlong
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*********************************************************************-->
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8" />
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<link rel="stylesheet" href="./../../libs/cesium/Cesium1.98/Widgets/widgets.css" />
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<script type="text/javascript" src="./../../libs/cesium/Cesium1.98/Cesium.js"></script>
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<script src="./latlng.js"></script>
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</head>
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<body style="
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margin: 0;
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overflow: hidden;
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background: #fff;
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width: 100%;
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height: 100%;
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position: absolute;
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top: 0;
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">
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<div id="map" style="margin: 0 auto; width: 100%; height: 100%"></div>
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<!-- ./video.mp4 -->
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<script type="text/javascript">
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Cesium.Ion.defaultAccessToken =
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"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiJjM2EzNGJmNy02N2RmLTQ0MDMtYjI2MS1hZTJiMTIwZGYwMTYiLCJpZCI6MzA0MzEyLCJpYXQiOjE3NDc3MjM3MTV9.ePQNhuoVuDsi_z00lTm5W26wyW1Adcr1AWetGM6WSXI";
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const viewer = new Cesium.Viewer("map", {});
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viewer.scene.debugShowFramesPerSecond = true;
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viewer.scene.globe.depthTestAgainstTerrain = true;
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// 地图视野定位
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viewer.camera.setView({
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destination: Cesium.Cartesian3.fromDegrees(120, 30, 3000),
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});
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// 视锥体位置
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let qd = Cesium.Cartesian3.fromDegrees(120, 30, 1000);
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let zd = Cesium.Cartesian3.fromDegrees(125, 30, 0);
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const fov = 30; //上下角度
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const near = 10; // 进距离
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const far = 5000; //远距离
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const aspectRatio = 1.4; //横向比例
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// 绘制
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addFrustum(
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qd,
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_getOrientation(qd, zd),
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fov,
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near,
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far,
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aspectRatio
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);
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// 创建视锥体及轮廓线
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function addFrustum(position, orientation, fov, near, far, aspectRatio) {
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let frustum = new Cesium.PerspectiveFrustum({
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// 查看的视场角，绕Z轴旋转，以弧度方式输入
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fov: Cesium.Math.toRadians(fov),
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// 视锥体的宽度/高度
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aspectRatio: aspectRatio,
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// 近面距视点的距离
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near: near,
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// 远面距视点的距离
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far: far,
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});
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let instanceGeo = new Cesium.GeometryInstance({
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geometry: new Cesium.FrustumGeometry({
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frustum: frustum,
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origin: position,
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orientation: orientation,
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vertexFormat: Cesium.VertexFormat.POSITION_ONLY,
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}),
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attributes: {
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color: Cesium.ColorGeometryInstanceAttribute.fromColor(
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new Cesium.Color(1.0, 0.0, 0.0, 0.3)
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),
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},
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});
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let instanceGeoLine = new Cesium.GeometryInstance({
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geometry: new Cesium.FrustumOutlineGeometry({
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frustum: frustum,
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origin: position,
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orientation: orientation,
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}),
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attributes: {
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color: Cesium.ColorGeometryInstanceAttribute.fromColor(
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new Cesium.Color(1.0, 1.0, 1.0, 1)
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),
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},
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});
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let primitive = new Cesium.Primitive({
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geometryInstances: [instanceGeo],
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appearance: new Cesium.PerInstanceColorAppearance({
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closed: true,
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flat: true,
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}),
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asynchronous: false,
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});
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let primitive1 = new Cesium.Primitive({
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geometryInstances: [instanceGeoLine],
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appearance: new Cesium.PerInstanceColorAppearance({
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closed: true,
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flat: true,
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}),
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asynchronous: false,
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});
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viewer.scene.primitives.add(primitive);
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viewer.scene.primitives.add(primitive1);
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// --------------------------获取顶点坐标---------------------------------------------------------
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let zb = Cesium.FrustumOutlineGeometry.createGeometry(instanceGeo.geometry)
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const positions = zb.attributes.position.values;
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console.log(positions)
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const temp = [];
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for (let i = 0; i < positions.length; i += 3) {
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temp.push(positions.slice(i, i + 3));
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}
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console.log(temp)
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const result = [];
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temp.forEach(function (chunk) {
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result.push( latlng.formatPositon(new Cesium.Cartesian3(chunk[0], chunk[1], chunk[2])) );
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});
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console.log(result)
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// --------------------------获取顶点坐标---------------------------------------------------------
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}
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function _getOrientation(cameraPosition, position) {
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var e = cameraPosition,
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t = position,
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i = Cesium.Cartesian3.normalize(
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Cesium.Cartesian3.subtract(t, e, new Cesium.Cartesian3()),
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new Cesium.Cartesian3()
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),
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a = Cesium.Cartesian3.normalize(e, new Cesium.Cartesian3()),
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n = new Cesium.Camera(viewer.scene);
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(n.position = e),
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(n.direction = i),
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(n.up = a),
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(i = n.directionWC),
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(a = n.upWC);
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var r = n.rightWC,
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o = new Cesium.Cartesian3(),
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l = new Cesium.Matrix3(),
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u = new Cesium.Quaternion();
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r = Cesium.Cartesian3.negate(r, o);
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var d = l;
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Cesium.Matrix3.setColumn(d, 0, r, d),
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Cesium.Matrix3.setColumn(d, 1, a, d),
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Cesium.Matrix3.setColumn(d, 2, i, d);
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var c = Cesium.Quaternion.fromRotationMatrix(d, u);
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return (this.orientation = c), c;
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}
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</script>
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</body>
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</html> |