spline: make get_value_no_save() const

2 files changed, 9 insertions, 3 deletions

diff --git a/spline-widget/spline.cpp b/spline-widget/spline.cpp
index 1f457715..2db23c14 100644
--- a/spline-widget/spline.cpp
+++ b/spline-widget/spline.cpp
@@ -101,14 +101,19 @@ float spline::get_value(double x)
     return ret;
 }
 
-float spline::get_value_no_save(double x)
+float spline::get_value_no_save(double x) const
+{
+    return const_cast<spline&>(*this).get_value_no_save_internal(x);
+}
+
+float spline::get_value_no_save_internal(double x)
 {
     QMutexLocker foo(&_mutex);
 
     if (max_x > 0)
         x = std::min(max_x, x);
 
-    float q  = float(x * precision(s->points));
+    float  q  = float(x * precision(s->points));
     int    xi = (int)q;
     float  yi = get_value_internal(xi);
     float  yiplus1 = get_value_internal(xi+1);
diff --git a/spline-widget/spline.hpp b/spline-widget/spline.hpp
index d9635397..77b2bdf9 100644
--- a/spline-widget/spline.hpp
+++ b/spline-widget/spline.hpp
@@ -46,6 +46,7 @@ class OPENTRACK_SPLINE_EXPORT spline final
     void update_interp_data();
     float get_value_internal(int x);
     void add_lone_point();
+    float get_value_no_save_internal(double x);
     static bool sort_fn(const QPointF& one, const QPointF& two);
 
     static QPointF ensure_in_bounds(const QList<QPointF>& points, double max_x, int i);
@@ -83,7 +84,7 @@ public:
     spline(const spline&) = default;
 
     float get_value(double x);
-    float get_value_no_save(double x);
+    float get_value_no_save(double x) const;
     DEFUN_WARN_UNUSED bool get_last_value(QPointF& point);
     void remove_point(int i);
     void clear();