!982 优化:增强板件捕捉

* fixes #I1FL9G

src/DatabaseServices/Entity/Extrude.ts

@@ -1,4 +1,4 @@
-import { BoxGeometry, BufferGeometry, ExtrudeGeometry, ExtrudeGeometryOptions, Line, LineSegments, Matrix3, Matrix4, Mesh, Object3D, Path, Vector3 } from "three";
+import { BoxGeometry, BufferGeometry, ExtrudeGeometry, ExtrudeGeometryOptions, LineSegments, Matrix3, Matrix4, Mesh, Object3D, Path, Vector3, Line as TLine } from "three";
 import { Line2 } from "three/examples/jsm/lines/Line2";
 import { arrayClone, arrayLast, arrayRemoveIf, arraySortByNumber, arraySum } from "../../Common/ArrayExt";
 import { ColorMaterial } from "../../Common/ColorPalette";
@@ -37,6 +37,7 @@ import { Ellipse } from "./Ellipse";
 import { Entity } from "./Entity";
 import { Polyline } from "./Polyline";
 import { Region } from "./Region";
+import { Line } from "./Line";
 
 export type ExtureContourCurve = Polyline | Circle;
 export type ExtureContour = Polyline | Circle | ExtrudeSolid | Region;
@@ -597,7 +598,15 @@ export class ExtrudeSolid extends Entity
                     pts.push(
                         ...contour.GetObjectSnapPoints(snapMode, pickPoint, lastPoint, viewXform)
                     );
-
+                    let ps = this.contourCurve.GetStretchPoints();
+                    for (let p of ps)
+                    {
+                        let l = new Line(p, p.clone().setZ(this.thickness));
+                        l.ApplyMatrix(this.OCS);
+                        pts.push(
+                            ...l.GetObjectSnapPoints(snapMode, pickPoint, lastPoint, viewXform)
+                        );
+                    }
                     for (let g of this.grooves)
                         pts.push(...g.GetObjectSnapPoints(snapMode, pickPoint, lastPoint, viewXform));
 
@@ -1608,7 +1617,7 @@ export class ExtrudeSolid extends Entity
     {
         if (renderType === RenderType.Wireframe)
         {
-            let l = obj as Line;
+            let l = obj as TLine;
             l.material = ColorMaterial.GetLineMaterial(this.ColorIndex);
         }
         else if (renderType === RenderType.Conceptual)