qfc: elide NaN values

1 files changed, 13 insertions, 1 deletions

diff --git a/qfunctionconfigurator/functionconfig.cpp b/qfunctionconfigurator/functionconfig.cpp
index 33f9beee..8c0bbc9f 100644
--- a/qfunctionconfigurator/functionconfig.cpp
+++ b/qfunctionconfigurator/functionconfig.cpp
@@ -67,6 +67,18 @@ static bool sortFn(const QPointF& one, const QPointF& two) {
     return one.x() < two.x();
 }
 
+static inline bool nanp(double value)
+{
+    return std::isnan(value) || std::isinf(value);
+}
+
+static inline double elide_nan(double value)
+{
+    if (nanp(value))
+        return -1;
+    return value;
+}
+
 void Map::reload() {
     if (cur.input.size())
     {
@@ -124,7 +136,7 @@ void Map::reload() {
                                       (-p0_y + 3. * p1_y - 3. * p2_y + p3_y) * t3);
                 
                 if (x >= 0 && x < sz)
-                    data[x] = y;
+                    data[x] = elide_nan(y);
             }
         }