优化:偏移算法修改,提前移除小线段,避免小线段陷入曲线裁剪

src/GraphicsSystem/OffsetPolyline.ts

@@ -542,7 +542,8 @@ export class OffsetPolyline
         for (let d of this._SubOffsetedCurves)
         {
             let c = d.curve;
-            this._CurveTreeNodes.push(new CurveTreeNode(c));
+            if (c.Length > 1e-5)
+                this._CurveTreeNodes.push(new CurveTreeNode(c));
             if (d.paddingCurve)
                 this._CurveTreeNodes.push(...d.paddingCurve.map(c => new CurveTreeNode(c)));
         }
@@ -567,8 +568,7 @@ export class OffsetPolyline
             let ns = n.Nodes;
             for (let sn of ns)
             {
-                let p = sn.curve.GetPointAtParam(0.5);
-                if (sn.curve.Length > 1e-5 && this.CheckPointDir(p))
+                if (this.CheckPointDir(sn.curve.GetPointAtParam(0.5)))
                     this._CurveTrimedTreeNodes.push(sn);
             }
         }