diff --git a/3rdparty/fonts/fnt.cxx b/3rdparty/fonts/fnt.cxx
index 458f65c..05a0ec0 100644
--- a/3rdparty/fonts/fnt.cxx
+++ b/3rdparty/fonts/fnt.cxx
@@ -49,15 +49,17 @@ float fntTexFont::low_putch ( sgVec3 curpos, float pointsize,
   /* Auto case-convert if character is absent from font. */
 
   //zhongjin
-  /*
   if ( ! exists [ cc ] )
   {
+
+//zhongjin
+/*
     if ( cc >= 'A' && cc <= 'Z' )
       cc = cc - 'A' + 'a' ;
     else
     if ( cc >= 'a' && cc <= 'z' )
       cc = cc - 'a' + 'A' ;
-
+*/
     if ( cc == ' ' )
     {
       curpos [ 0 ] += pointsize / 2.0f ;
@@ -65,7 +67,6 @@ float fntTexFont::low_putch ( sgVec3 curpos, float pointsize,
     }
   }
 
-  */
 
   /*
     We might want to consider making some absent characters from