初遇Citymaker (十)

常见的缓冲分析封装

• 调用

• let p1 = cw5.geometryCreator.createPoint(150139, 37917, 64);
• let line = cw5.geometryCreator.createPolyline([[150139, 37917, 64],
• [150180, 37854, 64],
• [150258, 37887, 64]]);
• let polygon = cw5.geometryCreator.createPolygon([[150139, 37917, 64],
• [150180, 37854, 64],
• [150258, 37887, 64],
• [150139, 37917, 64]]);
• //创建对应的样式
• let symbolL = cw5.symbolCreator.createPolylineSymbol("#c1ff3c", 1);
• let symbolP = cw5.symbolCreator.createPointSymbol_Simple(null, 20);
• let symbolPolygon1 = cw5.symbolCreator.createPolygonSymbol();
• let symbolPolygon = cw5.symbolCreator.createPolygonSymbol("#FFAF24", 0.5); //缓冲用的样式
• //展示出需要缓冲的要素方便查看
• cw5.renderLayerCtrl.createLayer("p", p1, symbolP);
• cw5.renderLayerCtrl.createLayer("line", line, symbolL);
• cw5.renderLayerCtrl.createLayer("polygon", polygon, symbolPolygon1);
•  
•  
• switch (type) {
• case "point":
• let buff = cw5.bufferUtils.buffer(p1, 10); //返回缓冲后的新要素
• cw5.renderLayerCtrl.createLayer("buff", buff, symbolPolygon);//展示在场景中，方便查看
• break;
• case "polyline":
• let buff2 = cw5.bufferUtils.buffer(line, 10);//返回缓冲后的新要素
• cw5.renderLayerCtrl.createLayer("buff", buff2, symbolPolygon);//展示在场景中，方便查看
• break;
• case "polygon":
• let buff3 = cw5.bufferUtils.buffer(polygon, 10);//返回缓冲后的新要素
• cw5.renderLayerCtrl.createLayer("buff", buff3, symbolPolygon);//展示在场景中，方便查看
• break;
• }

• bufferUtils 类

```javascript
import { cw5 } from "../index.js";

 更多参考 https://xiaozhuanlan.com/topic/1540786293