简化选取合适的交点

__test__/Polyline/__snapshots__/offset.test.ts.snap

@@ -32,6 +32,18 @@ exports[`圆求交错误导致的线丢失 7`] = `3783.7370117939813`;
 
 exports[`圆求交错误导致的线丢失 8`] = `4971.998320028233`;
 
+exports[`圆求交错误导致的线丢失 9`] = `1148.6589057383728`;
+
+exports[`圆求交错误导致的线丢失 10`] = `5979.860045322116`;
+
+exports[`圆求交错误导致的线丢失 11`] = `1049.9556072438302`;
+
+exports[`圆求交错误导致的线丢失 12`] = `6051.204453232351`;
+
+exports[`圆求交错误导致的线丢失 13`] = `722.4723063967795`;
+
+exports[`圆求交错误导致的线丢失 14`] = `6316.957052295357`;
+
 exports[`多段线存在0长度线段导致偏移错误 1`] = `1`;
 
 exports[`多段线存在0长度线段导致偏移错误 2`] = `81933.49238918608`;

__test__/Polyline/offset.test.ts

@@ -827,7 +827,7 @@ test('圆求交错误导致的线丢失', () =>
     f.Read();
     let pl = f.ReadObject() as Polyline;
 
-    for (let d of [10, 20, 30, 40])
+    for (let d of [10, 20, 30, 40, 269, 280, 320])
     {
         let cus = pl.GetOffsetCurves(d);
 

src/GraphicsSystem/OffsetPolyline.ts

@@ -662,8 +662,6 @@ export class PolyOffsetUtil
 
     /**
      * 选择合适的交点
-     * 优先选择交点在偏移方向上同一侧的
-     * 其次选择交点距离源线段为偏移距离的,若都是或者都不是,选择离传入点近的
      * @private
      * @param {Vector3[]} pts
      * @param {Vector3} refPt
@@ -674,34 +672,10 @@ export class PolyOffsetUtil
     {
         if (pts.length > 1)
         {
-            let rad2 = Math.pow(this.m_OffsetDist, 2);
-
-            //优先选择交点在偏移方向上同一侧的
-            let pt1Dir = this.CheckPointDir(pts[0]);
-            let pt2Dir = this.CheckPointDir(pts[1]);
-            if (pt1Dir !== pt2Dir)
-            {
-                return pt1Dir ? pts[0] : pts[1];
-            }
-
-            //计算到曲线的距离大于偏移距离
-            let [ptGtRad1, ptGtRad2] = pts.map(p =>
-            {
-                let dis = this.m_Polyline.GetClosestPointTo(p, false).distanceToSquared(p);
-                return dis + 1e-3 > rad2;
-            });
-
-            //都大于或者都小于`偏移距离`
-            if (ptGtRad1 === ptGtRad2)
-            {
-                let dist1 = refPt.distanceToSquared(pts[0]);
-                let dist2 = refPt.distanceToSquared(pts[1]);
-                return dist1 <= dist2 ? pts[0] : pts[1];
-            }
-            else
-                return ptGtRad1 ? pts[0] : pts[1];
+            let dist1 = refPt.distanceToSquared(pts[0]);
+            let dist2 = refPt.distanceToSquared(pts[1]);
+            return dist1 <= dist2 ? pts[0] : pts[1];
         }
-
         return pts[0];
     }
 }