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- /*-------------------------------------------------------------------------
- * 功能描述:LineUtil
- * 作者:xulisong
- * 创建时间: 2019/4/29 8:49:52
- * 版本号:v1.0
- * -------------------------------------------------------------------------*/
- using Autodesk.Revit.DB;
- using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Text;
- using System.Threading.Tasks;
- using SAGA.RevitUtils.Extends;
- namespace SAGA.RevitUtils.Utils
- {
- public static class LineUtil
- {
- /// <summary>
- /// 获取点在当前线的位置
- /// </summary>
- /// <param name="line"></param>
- /// <param name="point"></param>
- /// <returns>-1不在线上,0在开始点,1在结束点</returns>
- public static int GetPosition(Line line, XYZ point)
- {
- if (line.StartPoint().IsEqual(point))
- {
- return 0;
- }
- else if (line.EndPoint().IsEqual(point))
- {
- return 1;
- }
- else
- {
- return -1;
- }
- }
- /// <summary>
- /// 获取第一个满足条件的点,如果没有找到返回本身
- /// </summary>
- /// <param name="lines"></param>
- /// <param name="start"></param>
- /// <param name="breakCondition"></param>
- /// <returns></returns>
- public static XYZ GetFirstPoint(List<Line> lines, XYZ start, Func<XYZ, bool> breakCondition)
- {
- List<Line> useLines = new List<Line>();
- var usePoint = start;
- bool isFind = false;
- do
- {
- isFind = false;
- for (int i = 0; i < lines.Count; i++)
- {
- var tempLine = lines[i];
- if (useLines.Any(e => e == tempLine))
- {
- continue;
- }
- var flag = LineUtil.GetPosition(tempLine, usePoint);
- if (flag == -1)
- {
- continue;
- }
- isFind = true;
- if (flag == 0)
- {
- usePoint = tempLine.EndPoint();
- }
- else if (flag == 1)
- {
- usePoint = tempLine.StartPoint();
- }
- useLines.Add(tempLine);
- break;
- }
- } while (isFind && !breakCondition(usePoint));
- return usePoint;
- }
- }
- }
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