added function to convert an int to a string with padding (e.g. for filenames)

include/ACGL/Utils/StringHelpers.hh

@@ -48,6 +48,9 @@ namespace StringHelpers
     //! strips a string of all leading and trailing characters out of a given list (but leaves the ones in between)
     std::string stripOfCharacters( const std::string &_string, const std::string &_charsToStrip );
 
+    //! converts an int to a string but adds leading zeros (e.g. _maxPadding = 2, 1 -> 01)
+    std::string intToString( const int _number, const int _maxPadding = 0 );
+
     //! Convert a primitive type to a string (e.g. string s = toString(1.5f)), also supports some GLM types (but not complete)
     template<class T>
     std::string toString(const T& _t);

src/ACGL/Utils/StringHelpers.cc

@@ -7,6 +7,7 @@
 #include <ACGL/Utils/StringHelpers.hh>
 #include <ACGL/Math/Math.hh>
 #include <algorithm> // transform
+#include <iomanip> // setfill
 
 namespace ACGL{
 namespace Utils{
@@ -109,6 +110,17 @@ namespace StringHelpers
         return stripOfCharacters( _string, whitespaces );
     }
 
+    std::string intToString( const int _number, const int _maxPadding )
+    {
+        std::ostringstream stream;
+        if (_maxPadding > 0) {
+            stream << std::setfill('0') << std::setw(_maxPadding) << _number;
+        } else {
+            stream << _number;
+        }
+        return stream.str();
+    }
+
     template<class T>
     std::string toString(const T& _t)
     {