dded osg::ClipNode class for managing OpenGL clipping planes, and osgclip demo.

Make/makedefs

@@ -130,7 +130,7 @@ ifeq ($(ARCH),64)
 else
     ARCHARGS          = -n32
 endif
-  LINKARGS          = -LANG:std -OPT:Olimit=0 -L/usr/local/lib32 -rpath /usr/local/lib32 -rpath $(INST_LIBS)
+  LINKARGS          = -L${TOPDIR}/lib -LANG:std -OPT:Olimit=0 -L/usr/local/lib32 -rpath /usr/local/lib32 -rpath $(INST_LIBS)
   DYNAMICLIBRARYLIB = -ldl
   OSG_LIBS          = -losgGLUT -losgDB -losgUtil -losg 
   FREETYPE_LIB      = -lfreetype

Make/makedirdefs

@@ -48,13 +48,13 @@ PLUGIN_DIRS += dx
 # PLUGIN_DIRS += quicktime
 
 # comment in if you have libpng installed.
-PLUGIN_DIRS += png
+#PLUGIN_DIRS += png
 
 # comment in if you have libjpeg installed.
 PLUGIN_DIRS += jpeg
 
 # comment in if you have libungif installed.
-PLUGIN_DIRS += gif
+#PLUGIN_DIRS += gif
 
 # comment in if you have libtiff installed.
 PLUGIN_DIRS += tiff
@@ -65,6 +65,7 @@ PLUGIN_DIRS += tiff
 DEMOS_DIRS = \
 	hangglide\
 	osgbillboard\
+	osgclip\
 	osgcluster\
 	osgconv\
 	osgcopy\