fix #IKKTZ 修改真假交点判断

__test__/Polyline/offset.test.ts

@@ -35,5 +35,5 @@ test('IKKGK圆与直线补圆弧', () =>
 
     //圆丢失的问题
     cus = pl.GetOffsetCurves(-1.926388985025112);
-    expect(cus.length).toBe(2);
+    expect(cus.length).toBe(1);
 });

src/GraphicsSystem/OffestPolyline.ts

@@ -257,17 +257,11 @@ export class PolyOffestUtil
             else
             {
                 iPts = frontLine.IntersectWith(laterLine, IntersectOption.ExtendBoth);
+                //过滤掉交点为laterline终点的交点
                 tPts = iPts.filter(p =>
-                    (frontLine instanceof Arc || frontLine.GetParamAtPoint(p) > 0)
-                    && (laterLine instanceof Arc || laterLine.GetParamAtPoint(p) < 1)
+                    frontLine.PtOnCurve(p)
+                    && laterLine.PtOnCurve(p)
                 );
-
-                // iPts = frontLine.IntersectWith(laterLine, IntersectOption.ExtendBoth);
-                // //过滤掉交点为laterline终点的交点
-                // tPts = iPts.filter(p =>
-                //     frontLine.PtOnCurve(p)
-                //     && laterLine.PtOnCurve(p)
-                // );
             }
 
             if (tPts.length > 0)//存在真交点情况下直接修剪
@@ -364,6 +358,10 @@ export class PolyOffestUtil
             {
                 this.appendNewCuAndContour(frontLine, nextPt, intPt, startIndex);
             }
+            else if (frontLine instanceof Arc && par1 < 0 && par2 < 1)
+            {
+                this.appendNewCuAndContour(frontLine, nextPt, intPt, startIndex);
+            }
             else if (frontLine instanceof Arc)
             {
                 this.fillArc(endIndex - 1, endIndex, nextPt, frontLine, laterLine);