基于Cesium实现绘制圆形,正方形,多边形,椭圆图形标注
目录
- 官方案例
- 绘制矩形
- 绘制多边形
- 绘制椭圆
- 绘制圆形
- 绘制立方体
- 绘制椭圆柱体
- 绘制多边柱体
- 绘制圆柱体
- 立体串串
- 好难形容 又平面又立体的板板
- “回”字
- 绘制立方体,扭转一定角度的
- 在天上飘着的椭圆柱体
- 绘制椎体
- 平面图形的串串
这个是啥子嘞,就是向cesium上面添加圆形、正方形啥的。
官方案例
https://sandcastle.cesium.com/?src=Geometry%20and%20Appearances.html
官网写的很好了,但是有一些没有注释,所以说刚入门的小可爱们不知道那些代码分别是绘制啥的,所以说嘞,我稍微整理了一下。
绘制矩形
const stripeMaterial = new Cesium.StripeMaterialProperty({ evenColor: Cesium.Color.WHITE.withAlpha(0.5), oddColor: Cesium.Color.BLUE.withAlpha(0.5), repeat: 5.0, }); // 绘制矩形 let graphical = viewer.entities.add({ rectangle: { coordinates: Cesium.Rectangle.fromDegrees(116.8, 36.1, 116.9, 36.2), // 最西、最南、最东、最北 outline: true, outlineColor: Cesium.Color.WHITE, outlineWidth: 4, stRotation: Cesium.Math.toRadians(45), // material: stripeMaterial, }, })
绘制多边形
let graphical = viewer.entities.add({ polygon: { hierarchy: new Cesium.PolygonHierarchy( Cesium.Cartesian3.fromDegreesArray([ // 绘制多边形,经度和纬度值列表。值交替显示[经度,纬度,经度,纬度...]。 -107.0, 27.0, -107.0, 22.0, -102.0, 23.0, -97.0, 21.0, -97.0, 25.0, ]) ), outline: true, outlineColor: Cesium.Color.WHITE, outlineWidth: 4, // material: stripeMaterial, }, })
绘制椭圆
let graphical = viewer.entities.add({ position: Cesium.Cartesian3.fromDegrees(116.8, 36.1), ellipse: { semiMinorAxis: 300000.0, // 指定半短轴的数字属性。 semiMajorAxis: 500000.0, // 指定半长轴的数值属性。 rotation: Cesium.Math.toRadians(-40.0), // 一个数字属性,指定椭圆从北方逆时针旋转。 outline: true, // 一个布尔属性,指定是否勾勒出椭圆。 outlineColor: Cesium.Color.WHITE, // 一个属性,指定轮廓的 颜色 outlineWidth: 4, // 一个数字属性,指定轮廓的宽度。 stRotation: Cesium.Math.toRadians(22), // 一个数字属性,指定椭圆纹理从北方逆时针旋转。 // material: stripeMaterial, }, });
绘制圆形
let graphical = viewer.entities.add({ position: Cesium.Cartesian3.fromDegrees(-72.0, 25.0), ellipse: { semiMinorAxis: 250000.0, semiMajorAxis: 250000.0, rotation: Cesium.Math.toRadians(-40.0), outline: true, outlineColor: Cesium.Color.WHITE, outlineWidth: 4, stRotation: Cesium.Math.toRadians(90), // material: stripeMaterial, }, });
绘制立方体
// 绘制立方体 let graphical = viewer.entities.add({ rectangle: { coordinates: Cesium.Rectangle.fromDegrees( -118.0, 38.0, -116.0, 40.0 ), extrudedHeight: 500000.0, outline: true, outlineColor: Cesium.Color.WHITE, outlineWidth: 4, stRotation: Cesium.Math.toRadians(45), material: Cesium.Color.fromRandom({ alpha: 1.0 }), }, });
绘制椭圆柱体
// 绘制椭圆柱体 let graphical = viewer.entities.add({ position: Cesium.Cartesian3.fromDegrees(-117.0, 35.0), ellipse: { semiMinorAxis: 100000.0, semiMajorAxis: 200000.0, height: 100000.0, extrudedHeight: 200000.0, rotation: Cesium.Math.toRadians(90.0), outline: true, outlineColor: Cesium.Color.WHITE, outlineWidth: 4, material: Cesium.Color.fromRandom({ alpha: 1.0 }), }, });
绘制多边柱体
// 绘制多边柱体 let graphical = viewer.entities.add({ polygon: { hierarchy: new Cesium.PolygonHierarchy( Cesium.Cartesian3.fromDegreesArray([ -118.0, 30.0, -115.0, 30.0, -117.1, 31.1, -118.0, 33.0, ]) ), height: 300000.0, extrudedHeight: 700000.0, outline: true, outlineColor: Cesium.Color.WHITE, outlineWidth: 4, material: Cesium.Color.fromRandom({ alpha: 1.0 }), }, });
绘制圆柱体
// 绘制圆柱体 let graphical = viewer.entities.add({ position: Cesium.Cartesian3.fromDegrees(-70.0, 45.0, 100000.0), cylinder: { hierarchy: new Cesium.PolygonHierarchy( Cesium.Cartesian3.fromDegreesArray([ -118.0, 30.0, -115.0, 30.0, -117.1, 31.1, -118.0, 33.0, ]) ), length: 200000.0, topRadius: 150000.0, // 一个数字属性,指定圆柱顶部的半径。 bottomRadius: 150000.0, // 一个数字属性,指定圆柱体底部的半径。 outline: true, outlineColor: Cesium.Color.WHITE, outlineWidth: 4, material: Cesium.Color.fromRandom({ alpha: 1.0 }), }, });
立体串串
for (i = 0; i < 5; ++i) { let = height = 100000.0 + 200000.0 * i; viewer.entities.add({ position: Cesium.Cartesian3.fromDegrees(-106.0, 45.0, height), box: { dimensions: new Cesium.Cartesian3(90000.0, 90000.0, 90000.0), outline: true, outlineColor: Cesium.Color.WHITE, outlineWidth: 2, material: Cesium.Color.fromRandom({ alpha: 0.5 }), }, }); viewer.entities.add({ position: Cesium.Cartesian3.fromDegrees(-102.0, 45.0, height), ellipsoid: { radii: new Cesium.Cartesian3(45000.0, 45000.0, 90000.0), outline: true, outlineColor: Cesium.Color.WHITE, outlineWidth: 2, material: Cesium.Color.fromRandom({ alpha: 0.5 }), }, }); viewer.entities.add({ position: Cesium.Cartesian3.fromDegrees(-98.0, 45.0, height), ellipsoid: { radii: new Cesium.Cartesian3(67500.0, 67500.0, 67500.0), outline: true, outlineColor: Cesium.Color.WHITE, outlineWidth: 2, material: Cesium.Color.fromRandom({ alpha: 0.5 }), }, }); }
好难形容 又平面又立体的板板
// 绘制啥这是,又平面又立体的板板 viewer.entities.add({ wall: { positions: Cesium.Cartesian3.fromDegreesArray([ -95.0, 50.0, -85.0, 50.0, -75.0, 50.0, ]), maximumHeights: [500000, 1000000, 500000], minimumHeights: [0, 500000, 0], outline: true, outlineColor: Cesium.Color.LIGHTGRAY, outlineWidth: 4, material: Cesium.Color.fromRandom({ alpha: 0.7 }), }, });
“回”字
// 我滴妈呀,越来越难形容,一个“回”字 viewer.entities.add({ polygon: { hierarchy: { positions: Cesium.Cartesian3.fromDegreesArray([ -109.0, 30.0, -95.0, 30.0, -95.0, 40.0, -109.0, 40.0, ]), holes: [ { positions: Cesium.Cartesian3.fromDegreesArray([ -107.0, 31.0, -107.0, 39.0, -97.0, 39.0, -97.0, 31.0, ]), holes: [ { positions: Cesium.Cartesian3.fromDegreesArray([ -105.0, 33.0, -99.0, 33.0, -99.0, 37.0, -105.0, 37.0, ]), holes: [ { positions: Cesium.Cartesian3.fromDegreesArray([ -103.0, 34.0, -101.0, 34.0, -101.0, 36.0, -103.0, 36.0, ]), }, ], }, ], }, ], }, // material: stripeMaterial, }, });
绘制立方体,扭转一定角度的
// 绘制立方体,带旋转的 viewer.entities.add({ rectangle: { coordinates: Cesium.Rectangle.fromDegrees( -110.0, 38.0, -107.0, 40.0 ), height: 700000.0, // 一个数字属性,用于指定多边形相对于椭球表面的高度 extrudedHeight: 100000.0, // 一个数字属性,用于指定多边形的凸出面相对于椭球面的高度。 rotation: Cesium.Math.toRadians(45), material: Cesium.Color.fromRandom({ alpha: 1.0 }), }, });
在天上飘着的椭圆柱体
// 在天上飘着的椭圆柱体 viewer.entities.add({ position: Cesium.Cartesian3.fromDegrees(-110.0, 35.0), ellipse: { semiMinorAxis: 100000.0, semiMajorAxis: 200000.0, height: 300000.0, extrudedHeight: 700000.0, rotation: Cesium.Math.toRadians(-40.0), material: Cesium.Color.fromRandom({ alpha: 1.0 }), }, });
绘制椎体
viewer.entities.add({ position: Cesium.Cartesian3.fromDegrees(-70.0, 40.0, 200000.0), cylinder: { hierarchy: new Cesium.PolygonHierarchy( Cesium.Cartesian3.fromDegreesArray([ -118.0, 30.0, -115.0, 30.0, -117.1, 31.1, -118.0, 33.0, ]) ), length: 400000.0, topRadius: 0.0, bottomRadius: 200000.0, material: Cesium.Color.fromRandom({ alpha: 1.0 }), }, });
平面图形的串串
// 平面图形的串串 for (i = 0; i < 5; ++i) { let height = 200000.0 * i; viewer.entities.add({ position: Cesium.Cartesian3.fromDegrees(-65.0, 35.0), ellipse: { semiMinorAxis: 200000.0, semiMajorAxis: 200000.0, height: height, material: Cesium.Color.fromRandom({ alpha: 0.5 }), }, }); viewer.entities.add({ rectangle: { coordinates: Cesium.Rectangle.fromDegrees( -67.0, 27.0, -63.0, 32.0 ), height: height, material: Cesium.Color.fromRandom({ alpha: 0.5 }), }, }); }
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