Cesium Box - terrain excavation (with source code download)

Cesium

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Cesium is designed for three-dimensional map of the Earth and world-class open source JavaScript. It provides a development kit based on the JavaScript language, user-friendly Web applications to quickly build a zero Virtual Earth plug-in, and in performance, precision, and multi-platform rendering quality, ease of use have quality assurance.

About terrain excavation

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Excavation terrain surface topography that is, a range of excavated area, for displaying the terrain scene, often used in distribution network, underground drains, trapway other underground facilities, underground construction or the like.

Renderings

Advance preview interface

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Excavation and terrain-based interface cropping effect 3dtiles model used is the same, except that a different way. Still these interfaces.

• ClippingPlaneCollection
• ClippingPlane
• Globe

Specific operations

1, initialize the earth, and turn depth test

var viewer = new Cesium.Viewer('cesiumContainer', {
imageryProvider: new Cesium.UrlTemplateImageryProvider({
url: 'http://www.google.cn/maps/vt?lyrs=s@716&x={x}&y={y}&z={z}'
}),
terrainProvider: Cesium.createWorldTerrain({
requestVertexNormals: true,
requestWaterMask: true
})
});
viewer.scene.globe.depthTestAgainstTerrain = true;

2、指定开挖位置，并设置开挖距离

var position = Cesium.Cartographic.toCartesian(new Cesium.Cartographic.fromDegrees(-113.2665534, 36.0939345, 100));
var distance = -3000.0; // 开挖距离

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