Commited refactoring changes made on the train.

source/Utility.cpp

@@ -0,0 +1,38 @@
+#include "Utility.h"
+
+#include <cassert>
+
+namespace PolyVox
+{
+	//Note: this function only works for inputs which are a power of two and not zero
+	//If this is not the case then the output is undefined.
+	boost::uint8_t logBase2(boost::uint32_t uInput)
+	{
+		assert(uInput != 0);
+		assert(isPowerOf2(uInput));
+
+		boost::uint8_t result = 0;
+		uInput = uInput >> 1;
+		while(uInput)
+		{
+			uInput = uInput >> 1;
+			++result;
+		}
+		return result;
+	}
+
+	bool isPowerOf2(boost::uint32_t uInput)
+	{
+		boost::uint8_t uNonZeroBits = 0;
+		boost::uint32_t uMask = 0x00000001;
+		for(boost::uint8_t ct = 0; ct < 32; ++ct)
+		{
+			if(uInput & uMask)
+			{
+				++uNonZeroBits;
+			}
+			uMask = uMask << 1;
+		}
+		return uNonZeroBits == 1 ? true : false;
+	}
+}