mirror of
https://github.com/jiawanlong/Cesium-Examples.git
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108 lines
3.6 KiB
HTML
108 lines
3.6 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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</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.eyJqdGkiOiIwNDljNWFmZC03MzRlLTRiMDMtYWIwMi00Yjk4YWQ4NzQwZGEiLCJpZCI6MjU5LCJpYXQiOjE3NTEzNzkyMzR9.OTqPNs3UGNnT1LYkPTavV80wN8Es_YphpJgQcpdnqWc";
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const viewer = new Cesium.Viewer("map", {});
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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(-75.59777, 40.03883, 3000),
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});
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let primitive;
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let positions = {
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x: -75.59777,
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y: 40.03883,
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z: 3000
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}
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initFrustum();
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function initFrustum() {
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// 初始参数
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const fov = 45;
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const aspectRatio = 1920 / 1080;
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const near = 1.0;
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const far = 2000.0;
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var position = Cesium.Cartesian3.fromDegrees(positions.x, positions.y, positions.z);
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var heading = Cesium.Math.toRadians(0);
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var pitch = Cesium.Math.toRadians(0);
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var roll = Cesium.Math.toRadians(135);
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var hpr = new Cesium.HeadingPitchRoll(heading, pitch, roll);
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var orientation = Cesium.Transforms.headingPitchRollQuaternion(
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position,
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hpr
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);
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const frustum = new Cesium.PerspectiveFrustum({
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fov: Cesium.Math.toRadians(fov),
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aspectRatio: aspectRatio,
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near: near,
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far: far
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});
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const instanceGeo = new Cesium.GeometryInstance({
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geometry: new Cesium.FrustumGeometry({
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frustum: frustum,
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origin: Cesium.Cartesian3.ZERO, // 原点
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// orientation: Cesium.Quaternion.IDENTITY, // 初始无旋转
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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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const initialModelMatrix = Cesium.Transforms.eastNorthUpToFixedFrame(position);
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primitive = viewer.scene.primitives.add(new Cesium.Primitive({
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geometryInstances: instanceGeo,
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appearance: new Cesium.PerInstanceColorAppearance({
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translucent: true,
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closed: true
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}),
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modelMatrix: initialModelMatrix // 初始位置矩阵
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}));
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animate();
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}
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function animate() {
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positions.y += 0.0001;
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var newPosition = Cesium.Cartesian3.fromDegrees(positions.x, positions.y, positions.z);
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primitive.modelMatrix = Cesium.Transforms.eastNorthUpToFixedFrame(newPosition);
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requestAnimationFrame(animate);
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}
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</script>
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</body>
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</html> |