Cesium JS API
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WallOutlineGeometry

WallOutlineGeometry表示一系列的矩形墙壁线框几何体,其通过顶点、壁高以及壁宽来定义。

矩形墙体线框几何体可以用于创建三维墙体线框视图,同时,也可以用于绘制城市地形中的墙体线框,从而形成边框。

image

示例

// 创建一个墙体线框几何体实例
const wallOutline = new Cesium.WallOutlineGeometry({
    positions: Cesium.Cartesian3.fromDegreesArray([
        -72.0, 40.0,
        -70.0, 35.0
    ]),
    maximumHeights: [100000, 200000],
    minimumHeights: [0, 0],
    width: 1000,
    outlineWidth: 5
});

// 将墙体线框几何体实例化成为Primitive进行渲染
const wallOutlinePrimitive = new Cesium.Primitive({
    geometryInstances: new Cesium.GeometryInstance({
        geometry: wallOutline
    }),
    appearance: new Cesium.PerInstanceColorAppearance({
        flat: true,
        renderState: {
            lineWidth: Math.min(2, scene.maximumAliasedLineWidth)
        }
    })
});

// 添加到场景
scene.primitives.add(wallOutlinePrimitive);

构造函数

  • WallOutlineGeometry(options):创建一个新的矩形墙体线框几何体。

options

要创建的几何体的属性,包括以下:

  • positions:数组,每三个为一组表示顶点坐标,Cartesian3[]类型。
  • maximumHeights:数组,每个顶点的最大高度,用于定义不同高度的墙壁线框。number[]类型。
  • minimumHeights:数组,每个顶点的最小高度,可选属性。number[]类型。
  • width:每个顶点之间的距离,number类型。
  • granularity:线框几何体离散度,可选属性。number类型,默认值:Math.PI/180.0
  • ellipsoid:椭球体,可选属性。Ellipsoid类型,默认值:Ellipsoid.WGS84
  • heightOffset:偏移高度,可选属性。number类型,默认值:0.0
  • extrudedHeightOffset:挤出高度偏移量,可选属性。number类型,默认值:0.0
  • numberOfVerticalLines:每个墙体横截面上的垂直线数量,可选属性。number类型,默认值:2
  • outlined:是否描边,可选属性。boolean类型,默认值:true
  • outlineWidth:描边线宽,可选属性。number类型,默认值:1.0
  • arcType:带弧度类型,可选属性。ArcType类型,默认值:ArcType.NONE

静态方法

  • WallOutlineGeometry.createGeometry(wallOutlineGeometry):返回一个几何体对象来容纳WallOutlineGeometry的几何体定义。

wallOutlineGeometry

用于创建几何体的WallOutlineGeometry实例。

版本

Cesium 1.29

参考