Cesium专栏-terrain地形、3dtiles模型、gltf模型 高度采样
作者:互联网
在Cesium中,对于terrain地形、3dtiles模型、gltf模型的高度采样是一个很基本的功能,基于此,可以做一些深度应用,而Cesium已经帮我们提供了相应的API,在这里,我帮大家总结一下,如果遇到了,可以当做帮助文档随时浏览。
terrain地形 高度采样(API: Cesium.sampleTerrainMostDetailed)
通过两点决定一条直线,求取这条直线在地表高度
- var start = Cesium.Cartesian3.fromDegrees(114, 30);
- var end = Cesium.Cartesian3.fromDegrees(115, 30);
- var positions = [Cesium.Cartographic.fromCartesian(start)];
- // 插值100个点(自定义)
- var count = 100;
- for (var i = 1; i < count; i++) {
- var cart = Cesium.Cartesian3.lerp(start, end, i / count, new Cesium.Cartesian3());
- positions.push(Cesium.Cartographic.fromCartesian(cart));
- }
- positions.push(Cesium.Cartographic.fromCartesian(end));
- var promise = Cesium.sampleTerrainMostDetailed(terrainProvider, positions);
- Cesium.when(promise, function (updatedPositions) {
- // 每个点的高度
- var height = [];
- for (var i = 0; i < updatedPositions.length; i++) {
- height.push(updatedPositions[i].height);
- }
- }
3dtiles模型 高度采样(API: Scene.clampToHeightMostDetailed)
- var start = new Cesium.Cartesian3(1216467.760147752, -4736154.3567799, 4081478.9167016773);
- var end = new Cesium.Cartesian3(1216183.8039071201, -4736456.592237458, 4081200.6372076278);
- // 插值100个点
- var count = 100;
- var positions = [];
- for (var i = 0; i <= count; i++) {
- positions.push(Cesium.Cartesian3.lerp(start , end , i / count, new Cesium.Cartesian3()));
- }
- scene.clampToHeightMostDetailed(positions).then(function (clampedCartesians) {
- // 每个点的高度
- var height = [];
- for (var i = 0; i < count; ++i) {
- height.push(Cesium.Cartographic.fromCartesian(clampedCartesians[i]).height);
- }
- }
gltf模型 高度采样(API: Scene.sampleHeightMostDetailed)
更多详情见下面链接文章:
Cesium专栏-terrain地形、3dtiles模型、gltf模型 高度采样
对本专栏感兴趣的话,可以关注一波
标签:count,Cartesian3,positions,模型,terrain,height,var,3dtiles,Cesium 来源: https://www.cnblogs.com/giserhome/p/11641828.html