/// Version number. If this is left empty, the current date (in the format
/// YYMMDD) is used as a version number.
-const std::string EngineVersion = "1.2";
+const std::string EngineVersion = "";
////
#define Min(x, y) (((x) < (y))? (x) : (y))
#define Max(x, y) (((x) < (y))? (y) : (x))
+#define Abs(a) (((a) < 0) ? -(a) : (a))
////