From dc5093f732cabc98ce03556e0f3a697baf921c35 Mon Sep 17 00:00:00 2001
From: Klaus Basan <klaus.basan@klausbasan.de>
Date: Fri, 9 Nov 2018 02:53:58 +0100
Subject: [PATCH] Ref T429, interpolator functions

---
 .../simulation/interpolatorfunctions.h        | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 src/blackmisc/simulation/interpolatorfunctions.h

diff --git a/src/blackmisc/simulation/interpolatorfunctions.h b/src/blackmisc/simulation/interpolatorfunctions.h
new file mode 100644
index 000000000..77a58777a
--- /dev/null
+++ b/src/blackmisc/simulation/interpolatorfunctions.h
@@ -0,0 +1,34 @@
+/* Copyright (C) 2018
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+//! \file
+
+#ifndef BLACKMISC_SIMULATION_INTERPOLATORFUNCTIONS_H
+#define BLACKMISC_SIMULATION_INTERPOLATORFUNCTIONS_H
+
+namespace BlackMisc
+{
+    namespace Simulation
+    {
+        //! Valid time fraction [0,1]
+        inline bool isValidTimeFraction(double timeFraction)
+        {
+            return timeFraction >= 0.0 && timeFraction <= 1.0;
+        }
+
+        //! Clamp time fraction [0,1]
+        inline double clampValidTimeFraction(double timeFraction)
+        {
+            if (timeFraction > 1.0) { return 1.0; }
+            if (timeFraction < 0.0) { return 0.0; }
+            return timeFraction;
+        }
+    } // namespace
+} // namespace
+#endif // guard