+static const char TRACE_NONE_STR[]= "none";
+static const char TRACE_TEXT_STR[]= "text";
+static const char TRACE_PHM_STR[]= "phm";
+static const char TRACE_RAYS_STR[]= "rays";
+static const char TRACE_PLOT_STR[]= "plot";
+static const char TRACE_CLIPPING_STR[]= "clipping";
+
+class TraceLevel
+{
+ public:
+ TraceLevel (const char* const traceString);
+
+ addTrace (const char* const traceString);
+
+ bool isTrace (const char* const traceQuery) const;
+
+ private:
+
+ bool addTraceElements (const char* const traceString);
+};
+
+