新增平滑曲线demo

smoothcurve/smoothcurve.h

@@ -0,0 +1,27 @@
+#ifndef SMOOTHCURVE_H
+#define SMOOTHCURVE_H
+
+#include <QObject>
+#include <QVector>
+#include <QPointF>
+#include <QPainterPath>
+
+#ifdef quc
+class Q_DECL_EXPORT SmoothCurve : public QObject
+#else
+class SmoothCurve : public QObject
+#endif
+
+{
+public:
+    //创建平滑曲线路径
+    static QPainterPath createSmoothCurve(const QVector<QPointF> &points);
+
+private:
+    static void calculateFirstControlPoints(double *&result, const double *rhs, int n);
+    static void calculateControlPoints(const QVector<QPointF> &datas,
+                                       QVector<QPointF> *firstControlPoints,
+                                       QVector<QPointF> *secondControlPoints);
+};
+
+#endif // SMOOTHCURVE_H