From 98312c2c379cb9707914fe0484e2f6c0e08ead3d Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Wed, 11 Mar 2015 16:27:37 +1100
Subject: [PATCH] range: add interpolation accessor

---
 range.cpp | 9 +++++++++
 range.hpp | 3 +++
 2 files changed, 12 insertions(+)

diff --git a/range.cpp b/range.cpp
index 4155a323..da6a8962 100644
--- a/range.cpp
+++ b/range.cpp
@@ -66,6 +66,15 @@ util::range<T>::contains (const range <T> &r) const
 }
 
 
+//-----------------------------------------------------------------------------
+template <typename T>
+T
+util::range<T>::at (float t) const
+{
+    return static_cast<T> (min + (max - min) * t);
+}
+
+
 //-----------------------------------------------------------------------------
 template <typename T>
 T
diff --git a/range.hpp b/range.hpp
index ee056e67..21ad4cad 100644
--- a/range.hpp
+++ b/range.hpp
@@ -45,6 +45,9 @@ namespace util {
         /// Check whether a range falls partially within (inclusive) this range
         //bool includes (const range <T> &r) const;
 
+        /// interpolate between min-max using the unit position
+        T at (float) const;
+
         /// Return the closest number that falls within the range.
         T clamp (T val) const;