优化:圆形拉伸实体的端点捕捉

src/DatabaseServices/3DSolid/ExtrudeHole.ts

@@ -17,6 +17,7 @@ import { AutoRecord } from "../AutoRecord";
 import { Factory } from "../CADFactory";
 import { CADFiler } from "../CADFiler";
 import { Contour } from "../Contour";
+import { Circle } from "../Entity/Circle";
 import { DragPointType } from "../Entity/DragPointType";
 import { ExtrudeContourCurve, ExtrudeSolid } from "../Entity/Extrude";
 import { GenUVForWorld } from "../Entity/GenUVForWorld";
@@ -161,6 +162,8 @@ export class ExtrudeHole extends Hole
         switch (snapMode)
         {
             case ObjectSnapMode.End:
+                if (this._contourCurve instanceof Circle)
+                    return this.GetGripPoints();
                 return this.GetStretchPoints();
             case ObjectSnapMode.Mid:
             case ObjectSnapMode.Cen:

src/DatabaseServices/Entity/Extrude.ts

@@ -821,6 +821,8 @@ export class ExtrudeSolid extends Entity
         switch (snapMode)
         {
             case ObjectSnapMode.End:
+                if (this.contourCurve instanceof Circle)
+                    return this.GetGripPoints();
                 return this.GetStretchPoints();
             case ObjectSnapMode.Mid:
             case ObjectSnapMode.Cen: