From f3307e47a850091d9ef16da015c31fd2bb71e44b Mon Sep 17 00:00:00 2001
From: Simon Robertshaw <simon@hardwired.org.uk>
Date: Sun, 18 Nov 2012 22:24:56 +0000
Subject: [PATCH] Helper function for linear interpolation

---
 src/Misc.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/Misc.h b/src/Misc.h
index cfac84133..5ab6cf5ef 100644
--- a/src/Misc.h
+++ b/src/Misc.h
@@ -26,6 +26,13 @@ static char hex[] = "0123456789ABCDEF";
 
 char *exe_name(void);
 
+//Linear interpolation
+template <typename T> inline T LinearInterpolate(T val1, T val2, T lowerCoord, T upperCoord, T coord)
+{
+	if(lowerCoord == upperCoord) return val1;
+	return (((val2 - val1) / (upperCoord - lowerCoord)) * (coord - lowerCoord)) + val1;
+}
+
 //Signum function
 int isign(float i);