From 0a8c663d2dbb51269539309852438ed17ce0e710 Mon Sep 17 00:00:00 2001
From: ChenX <maple6@vip.qq.com>
Date: Wed, 31 Jul 2019 14:46:07 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D=E6=8D=95=E6=8D=89=E5=9F=BA?=
 =?UTF-8?q?=E7=82=B9=E8=A2=AB=E4=B8=A2=E5=BC=83?=
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---
 src/Editor/SnapServices.ts | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/Editor/SnapServices.ts b/src/Editor/SnapServices.ts
index d53ca32e9..a8c54b717 100644
--- a/src/Editor/SnapServices.ts
+++ b/src/Editor/SnapServices.ts
@@ -274,15 +274,21 @@ export class SnapServices
                     () =>
                     {
                         let fIndex = this.m_SupportSnapPoints.findIndex(p => equalv3(p.Point, snapData.Point));
-                        if (fIndex > 0)//基点不移除
+                        if (fIndex !== -1)
                         {
-                            this.m_SupportSnapPoints.splice(fIndex, 1);
+                            if (!(fIndex === 0 && this.m_HasBasePoint))//基点不移除
+                                this.m_SupportSnapPoints.splice(fIndex, 1);
                         }
                         else
                         {
                             this.m_SupportSnapPoints.push(snapData);
                             if (this.m_SupportSnapPoints.length > 7)
-                                this.m_SupportSnapPoints.shift();
+                            {
+                                if (this.m_HasBasePoint)
+                                    this.m_SupportSnapPoints.splice(1, 1);
+                                else
+                                    this.m_SupportSnapPoints.shift();
+                            }
                         }
                         this.UpdateCrossCursor();
                     },