Changeset 8127 in ntrip for trunk/BNC/qwt/qwt_curve_fitter.h

Timestamp:

May 10, 2017, 3:20:54 PM (7 years ago)

Author:

stoecker

Message:

update qwt and qwtpolar, many QT5 fixes (unfinished)

File:

• trunk/BNC/qwt/qwt_curve_fitter.h (modified) (2 diffs)

trunk/BNC/qwt/qwt_curve_fitter.h

@@ -100 +100 @@
   smoothed curve.
 
+  The runtime of the algorithm increases non linear ( worst case O( n*n ) )
+  and might be very slow for huge polygons. To avoid performance issues
+  it might be useful to split the polygon ( setChunkSize() ) and to run the algorithm
+  for these smaller parts. The disadvantage of having no interpolation
+  at the borders is for most use cases irrelevant.
+
   The smoothed curve consists of a subset of the points that defined the
   original curve.
@@ -117 +123 @@
     double tolerance() const;
 
+    void setChunkSize( uint );
+    uint chunkSize() const;
+
     virtual QPolygonF fitCurve( const QPolygonF & ) const;
 
 private:
+    virtual QPolygonF simplify( const QPolygonF & ) const;
+
     class Line;