From e73c31ebd6c2a1cc3fe61d8b538b138b66ee4f11 Mon Sep 17 00:00:00 2001
From: wang2006zhi <5432325+wang2006zhi@user.noreply.gitee.com>
Date: Mon, 20 Jun 2022 04:20:34 +0000
Subject: [PATCH] =?UTF-8?q?update=20src/IFoxCAD.Cad/ExtensionMethod/Curve3?=
 =?UTF-8?q?dEx.cs.=20=E6=B7=BB=E5=8A=A0=E7=82=B9=E4=B8=8E=E7=9B=B4?=
 =?UTF-8?q?=E7=BA=BF=E5=85=B3=E7=B3=BB=E6=89=A9=E5=B1=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/IFoxCAD.Cad/ExtensionMethod/Curve3dEx.cs | 43 +++++++++++++++++++-
 1 file changed, 41 insertions(+), 2 deletions(-)

diff --git a/src/IFoxCAD.Cad/ExtensionMethod/Curve3dEx.cs b/src/IFoxCAD.Cad/ExtensionMethod/Curve3dEx.cs
index 226e5de..870fdbd 100644
--- a/src/IFoxCAD.Cad/ExtensionMethod/Curve3dEx.cs
+++ b/src/IFoxCAD.Cad/ExtensionMethod/Curve3dEx.cs
@@ -1,4 +1,4 @@
-namespace IFoxCAD.Cad;
+namespace IFoxCAD.Cad;
 
 /// <summary>
 /// 三维解析类曲线转换为三维实体曲线扩展类
@@ -16,7 +16,46 @@ public static bool IsEqualPoint(this Tolerance tol, double d1, double d2)
     {
         return Math.Abs(d1 - d2) < tol.EqualPoint;
     }
-
+        /// <summary>
+        /// 判断点与另外两点的位置关系
+        /// </summary>
+        /// <param name="pt0"></param>
+        /// <param name="pt1"></param>
+        /// <param name="pt2"></param>
+        /// <param name="dTol"></param>
+        /// <returns></returns>
+        /// 
+        public static PtOnlineType IsOnLine(this Point3d pt0, Point3d pt1, Point3d pt2, double dTol)
+        {
+            var value = PtOnlineType.OutLineP12;
+            double d12 = Math.Abs(pt1.DistanceTo(pt2));
+            double d01 = Math.Abs(pt0.DistanceTo(pt1));
+            double d02 = Math.Abs(pt0.DistanceTo(pt2));
+            if (d12 == d01+d02) value = 0;
+            if (d02 == d01+d12)
+            {
+                if (d01 <= dTol)
+                {
+                    value = PtOnlineType.OnLineP1N;
+                }
+                else
+                {
+                    value = PtOnlineType.OnLineP1W;
+                }
+            }
+            if (d01 == d02+d12)
+            {
+                if (d02 <= dTol)
+                {
+                    value = PtOnlineType.OnLineP2N;
+                }
+                else
+                {
+                    value = PtOnlineType.OnLineP2W;
+                }
+            }
+            return value;
+        }
     #region Curve3d
 
     /// <summary>
-- 
Gitee