Added osgteapot demo to show how to implement custom Drawables to

wrap up OpenGL code.
2002-10-02 15:28:17 +00:00
parent 06022febff
commit 65ab5f7b62
8 changed files with 506 additions and 0 deletions
--- a/Make/debugtests.bat
+++ b/Make/debugtests.bat
@@ -91,6 +91,10 @@ echo osgstereoimage Images/dog_left_eye.jpg Images/dog_right_eye.jpg
 osgstereoimage Images/dog_left_eye.jpg Images/dog_right_eye.jpg
 more memleaks.log

+echo osgteapot
+osgteapot
+more memleaks.log
+
 echo osgtext
 osgtext
 more memleaks.log
--- a/Make/makedirdefs
+++ b/Make/makedirdefs
@@ -89,6 +89,7 @@ DEMOS_DIRS = \
 	osgscribe\
 	osgstereoimage\
 	osgsequence\
+	osgteapot\
 	osgtext\
 	osgtexture1D\
 	osgtexture2D\
--- a/Make/osgtests.bat
+++ b/Make/osgtests.bat
@@ -64,6 +64,9 @@ osgscribe cow.osg
 echo osgstereoimage Images/dog_left_eye.jpg Images/dog_right_eye.jpg
 osgstereoimage Images/dog_left_eye.jpg Images/dog_right_eye.jpg

+echo osgteapot
+osgteapot
+
 echo osgtext
 osgtext

--- a/VisualStudio/Demos/osgteapot/osgteapot.dsp
+++ b/VisualStudio/Demos/osgteapot/osgteapot.dsp
@@ -0,0 +1,96 @@
+# Microsoft Developer Studio Project File - Name="Demo osgteapot" - Package Owner=<4>
+# Microsoft Developer Studio Generated Build File, Format Version 6.00
+# ** DO NOT EDIT **
+
+# TARGTYPE "Win32 (x86) Console Application" 0x0103
+
+CFG=Demo osgteapot - Win32 Release
+!MESSAGE This is not a valid makefile. To build this project using NMAKE,
+!MESSAGE use the Export Makefile command and run
+!MESSAGE 
+!MESSAGE NMAKE /f "osgteapot.mak".
+!MESSAGE 
+!MESSAGE You can specify a configuration when running NMAKE
+!MESSAGE by defining the macro CFG on the command line. For example:
+!MESSAGE 
+!MESSAGE NMAKE /f "osgteapot.mak" CFG="Demo osgteapot - Win32 Release"
+!MESSAGE 
+!MESSAGE Possible choices for configuration are:
+!MESSAGE 
+!MESSAGE "Demo osgteapot - Win32 Release" (based on "Win32 (x86) Console Application")
+!MESSAGE "Demo osgteapot - Win32 Debug" (based on "Win32 (x86) Console Application")
+!MESSAGE 
+
+# Begin Project
+# PROP AllowPerConfigDependencies 0
+# PROP Scc_ProjName ""
+# PROP Scc_LocalPath ""
+CPP=cl.exe
+RSC=rc.exe
+
+!IF  "$(CFG)" == "Demo osgteapot - Win32 Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "Release"
+# PROP BASE Intermediate_Dir "Release"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
+# PROP Output_Dir "Release"
+# PROP Intermediate_Dir "Release"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c
+# ADD CPP /nologo /MD /W3 /GR /GX /O2 /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c
+# ADD BASE RSC /l 0x809 /d "NDEBUG"
+# ADD RSC /l 0x809 /d "NDEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386
+# ADD LINK32 /nologo /subsystem:console /pdb:none /machine:I386 /out:"../../../bin/osgteapot.exe" /libpath:"../../../lib"
+
+!ELSEIF  "$(CFG)" == "Demo osgteapot - Win32 Debug"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 1
+# PROP BASE Output_Dir "Debug"
+# PROP BASE Intermediate_Dir "Debug"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 1
+# PROP Output_Dir "Debug"
+# PROP Intermediate_Dir "Debug"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /W3 /Gm /GX /Zi /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c
+# ADD CPP /nologo /MDd /W3 /Gm /vd0 /GR /GX /Zi /Od /I "../../../include" /D "_CONSOLE" /D "_MBCS" /D "FL_DLL" /D "WIN32" /D "_DEBUG" /FR /YX /FD /c
+# ADD BASE RSC /l 0x809 /d "_DEBUG"
+# ADD RSC /l 0x809 /d "_DEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
+# ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /nodefaultlib:"libcmt" /out:"../../../bin/osgteapotd.exe" /pdbtype:sept /libpath:"../../../lib"
+# SUBTRACT LINK32 /incremental:no
+
+!ENDIF 
+
+# Begin Target
+
+# Name "Demo osgteapot - Win32 Release"
+# Name "Demo osgteapot - Win32 Debug"
+# Begin Source File
+
+SOURCE=..\..\..\src\Demos\osgteapot\osgteapot.cpp
+# End Source File
+# End Target
+# Begin Group "Resource Files"
+
+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"
+# End Group
+# End Project
+<EFBFBD><EFBFBD>
--- a/VisualStudio/VisualStudio.dsw
+++ b/VisualStudio/VisualStudio.dsw
@@ -354,6 +354,33 @@ Package=<4>

 ###############################################################################

+Project: "Demo osgteapot"=.\Demos\osgteapot\osgteapot.dsp - Package Owner=<4>
+
+Package=<5>
+{{{
+}}}
+
+Package=<4>
+{{{
+    Begin Project Dependency
+    Project_Dep_Name Core osg
+    End Project Dependency
+    Begin Project Dependency
+    Project_Dep_Name Core osgDB
+    End Project Dependency
+    Begin Project Dependency
+    Project_Dep_Name Core osgGA
+    End Project Dependency
+    Begin Project Dependency
+    Project_Dep_Name Core osgGLUT
+    End Project Dependency
+    Begin Project Dependency
+    Project_Dep_Name Core osgUtil
+    End Project Dependency
+}}}
+
+##############################################################################################################################################################
+
 Project: "Demo osggeometry"=.\Demos\osggeometry\osggeometry.dsp - Package Owner=<4>

 Package=<5>
--- a/src/Demos/osgteapot/Makefile
+++ b/src/Demos/osgteapot/Makefile
@@ -0,0 +1,15 @@
+TOPDIR = ../../..
+include $(TOPDIR)/Make/makedefs 
+
+CXXFILES =\
+	osgteapot.cpp\
+
+LIBS     += $(OSG_LIBS) $(GLUT_LIB) $(GL_LIBS) $(X_LIBS) $(OTHER_LIBS) 
+
+INSTFILES = \
+	$(CXXFILES)\
+	Makefile.inst=Makefile
+
+EXEC = osgteapot
+
+include $(TOPDIR)/Make/makerules 
--- a/src/Demos/osgteapot/Makefile.inst
+++ b/src/Demos/osgteapot/Makefile.inst
@@ -0,0 +1,11 @@
+TOPDIR = ../..
+include $(TOPDIR)/Make/makedefs
+
+CXXFILES =\
+	osgcube.cpp\
+
+LIBS     += $(OSG_LIBS) $(GLUT_LIB) $(GL_LIBS) $(X_LIBS) $(OTHER_LIBS) 
+
+EXEC = osgcube
+
+include $(TOPDIR)/Make/makerules
--- a/src/Demos/osgteapot/osgteapot.cpp
+++ b/src/Demos/osgteapot/osgteapot.cpp
@@ -0,0 +1,349 @@
+#include <osg/Geode>
+#include <osg/TexGen>
+#include <osg/Texture2D>
+
+#include <osgDB/ReadFile>
+
+#include <osgGA/TrackballManipulator>
+
+#include <osgGLUT/Viewer>
+#include <osgGLUT/glut>
+
+
+// The classic OpenGL teapot... taken form glut-3.7/lib/glut/glut_teapot.c
+
+/* Copyright (c) Mark J. Kilgard, 1994. */
+
+/**
+(c) Copyright 1993, Silicon Graphics, Inc.
+
+ALL RIGHTS RESERVED
+
+Permission to use, copy, modify, and distribute this software
+for any purpose and without fee is hereby granted, provided
+that the above copyright notice appear in all copies and that
+both the copyright notice and this permission notice appear in
+supporting documentation, and that the name of Silicon
+Graphics, Inc. not be used in advertising or publicity
+pertaining to distribution of the software without specific,
+written prior permission.
+
+THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU
+"AS-IS" AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR
+OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF
+MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  IN NO
+EVENT SHALL SILICON GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE
+ELSE FOR ANY DIRECT, SPECIAL, INCIDENTAL, INDIRECT OR
+CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER,
+INCLUDING WITHOUT LIMITATION, LOSS OF PROFIT, LOSS OF USE,
+SAVINGS OR REVENUE, OR THE CLAIMS OF THIRD PARTIES, WHETHER OR
+NOT SILICON GRAPHICS, INC.  HAS BEEN ADVISED OF THE POSSIBILITY
+OF SUCH LOSS, HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ARISING OUT OF OR IN CONNECTION WITH THE POSSESSION, USE OR
+PERFORMANCE OF THIS SOFTWARE.
+
+US Government Users Restricted Rights
+
+Use, duplication, or disclosure by the Government is subject to
+restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
+(c)(1)(ii) of the Rights in Technical Data and Computer
+Software clause at DFARS 252.227-7013 and/or in similar or
+successor clauses in the FAR or the DOD or NASA FAR
+Supplement.  Unpublished-- rights reserved under the copyright
+laws of the United States.  Contractor/manufacturer is Silicon
+Graphics, Inc., 2011 N.  Shoreline Blvd., Mountain View, CA
+94039-7311.
+
+OpenGL(TM) is a trademark of Silicon Graphics, Inc.
+*/
+
+
+/* Rim, body, lid, and bottom data must be reflected in x and
+   y; handle and spout data across the y axis only.  */
+
+static int patchdata[][16] =
+{
+    /* rim */
+  {102, 103, 104, 105, 4, 5, 6, 7, 8, 9, 10, 11,
+    12, 13, 14, 15},
+    /* body */
+  {12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
+    24, 25, 26, 27},
+  {24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36,
+    37, 38, 39, 40},
+    /* lid */
+  {96, 96, 96, 96, 97, 98, 99, 100, 101, 101, 101,
+    101, 0, 1, 2, 3,},
+  {0, 1, 2, 3, 106, 107, 108, 109, 110, 111, 112,
+    113, 114, 115, 116, 117},
+    /* bottom */
+  {118, 118, 118, 118, 124, 122, 119, 121, 123, 126,
+    125, 120, 40, 39, 38, 37},
+    /* handle */
+  {41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52,
+    53, 54, 55, 56},
+  {53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64,
+    28, 65, 66, 67},
+    /* spout */
+  {68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
+    80, 81, 82, 83},
+  {80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91,
+    92, 93, 94, 95}
+};
+/* *INDENT-OFF* */
+
+static float cpdata[][3] =
+{
+    {0.2, 0, 2.7}, {0.2, -0.112, 2.7}, {0.112, -0.2, 2.7}, {0,
+    -0.2, 2.7}, {1.3375, 0, 2.53125}, {1.3375, -0.749, 2.53125},
+    {0.749, -1.3375, 2.53125}, {0, -1.3375, 2.53125}, {1.4375,
+    0, 2.53125}, {1.4375, -0.805, 2.53125}, {0.805, -1.4375,
+    2.53125}, {0, -1.4375, 2.53125}, {1.5, 0, 2.4}, {1.5, -0.84,
+    2.4}, {0.84, -1.5, 2.4}, {0, -1.5, 2.4}, {1.75, 0, 1.875},
+    {1.75, -0.98, 1.875}, {0.98, -1.75, 1.875}, {0, -1.75,
+    1.875}, {2, 0, 1.35}, {2, -1.12, 1.35}, {1.12, -2, 1.35},
+    {0, -2, 1.35}, {2, 0, 0.9}, {2, -1.12, 0.9}, {1.12, -2,
+    0.9}, {0, -2, 0.9}, {-2, 0, 0.9}, {2, 0, 0.45}, {2, -1.12,
+    0.45}, {1.12, -2, 0.45}, {0, -2, 0.45}, {1.5, 0, 0.225},
+    {1.5, -0.84, 0.225}, {0.84, -1.5, 0.225}, {0, -1.5, 0.225},
+    {1.5, 0, 0.15}, {1.5, -0.84, 0.15}, {0.84, -1.5, 0.15}, {0,
+    -1.5, 0.15}, {-1.6, 0, 2.025}, {-1.6, -0.3, 2.025}, {-1.5,
+    -0.3, 2.25}, {-1.5, 0, 2.25}, {-2.3, 0, 2.025}, {-2.3, -0.3,
+    2.025}, {-2.5, -0.3, 2.25}, {-2.5, 0, 2.25}, {-2.7, 0,
+    2.025}, {-2.7, -0.3, 2.025}, {-3, -0.3, 2.25}, {-3, 0,
+    2.25}, {-2.7, 0, 1.8}, {-2.7, -0.3, 1.8}, {-3, -0.3, 1.8},
+    {-3, 0, 1.8}, {-2.7, 0, 1.575}, {-2.7, -0.3, 1.575}, {-3,
+    -0.3, 1.35}, {-3, 0, 1.35}, {-2.5, 0, 1.125}, {-2.5, -0.3,
+    1.125}, {-2.65, -0.3, 0.9375}, {-2.65, 0, 0.9375}, {-2,
+    -0.3, 0.9}, {-1.9, -0.3, 0.6}, {-1.9, 0, 0.6}, {1.7, 0,
+    1.425}, {1.7, -0.66, 1.425}, {1.7, -0.66, 0.6}, {1.7, 0,
+    0.6}, {2.6, 0, 1.425}, {2.6, -0.66, 1.425}, {3.1, -0.66,
+    0.825}, {3.1, 0, 0.825}, {2.3, 0, 2.1}, {2.3, -0.25, 2.1},
+    {2.4, -0.25, 2.025}, {2.4, 0, 2.025}, {2.7, 0, 2.4}, {2.7,
+    -0.25, 2.4}, {3.3, -0.25, 2.4}, {3.3, 0, 2.4}, {2.8, 0,
+    2.475}, {2.8, -0.25, 2.475}, {3.525, -0.25, 2.49375},
+    {3.525, 0, 2.49375}, {2.9, 0, 2.475}, {2.9, -0.15, 2.475},
+    {3.45, -0.15, 2.5125}, {3.45, 0, 2.5125}, {2.8, 0, 2.4},
+    {2.8, -0.15, 2.4}, {3.2, -0.15, 2.4}, {3.2, 0, 2.4}, {0, 0,
+    3.15}, {0.8, 0, 3.15}, {0.8, -0.45, 3.15}, {0.45, -0.8,
+    3.15}, {0, -0.8, 3.15}, {0, 0, 2.85}, {1.4, 0, 2.4}, {1.4,
+    -0.784, 2.4}, {0.784, -1.4, 2.4}, {0, -1.4, 2.4}, {0.4, 0,
+    2.55}, {0.4, -0.224, 2.55}, {0.224, -0.4, 2.55}, {0, -0.4,
+    2.55}, {1.3, 0, 2.55}, {1.3, -0.728, 2.55}, {0.728, -1.3,
+    2.55}, {0, -1.3, 2.55}, {1.3, 0, 2.4}, {1.3, -0.728, 2.4},
+    {0.728, -1.3, 2.4}, {0, -1.3, 2.4}, {0, 0, 0}, {1.425,
+    -0.798, 0}, {1.5, 0, 0.075}, {1.425, 0, 0}, {0.798, -1.425,
+    0}, {0, -1.5, 0.075}, {0, -1.425, 0}, {1.5, -0.84, 0.075},
+    {0.84, -1.5, 0.075}
+};
+
+static float tex[2][2][2] =
+{
+  { {0, 0},
+    {1, 0}},
+  { {0, 1},
+    {1, 1}}
+};
+
+/* *INDENT-ON* */
+
+static void
+teapot(GLint grid, GLenum type)
+{
+  float p[4][4][3], q[4][4][3], r[4][4][3], s[4][4][3];
+  long i, j, k, l;
+
+  glPushAttrib(GL_ENABLE_BIT | GL_EVAL_BIT);
+  glEnable(GL_AUTO_NORMAL);
+  glEnable(GL_NORMALIZE);
+  glEnable(GL_MAP2_VERTEX_3);
+  glEnable(GL_MAP2_TEXTURE_COORD_2);
+  for (i = 0; i < 10; i++) {
+    for (j = 0; j < 4; j++) {
+      for (k = 0; k < 4; k++) {
+        for (l = 0; l < 3; l++) {
+          p[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
+          q[j][k][l] = cpdata[patchdata[i][j * 4 + (3 - k)]][l];
+          if (l == 1)
+            q[j][k][l] *= -1.0;
+          if (i < 6) {
+            r[j][k][l] =
+              cpdata[patchdata[i][j * 4 + (3 - k)]][l];
+            if (l == 0)
+              r[j][k][l] *= -1.0;
+            s[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
+            if (l == 0)
+              s[j][k][l] *= -1.0;
+            if (l == 1)
+              s[j][k][l] *= -1.0;
+          }
+        }
+      }
+    }
+    glMap2f(GL_MAP2_TEXTURE_COORD_2, 0, 1, 2, 2, 0, 1, 4, 2,
+      &tex[0][0][0]);
+    glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
+      &p[0][0][0]);
+    glMapGrid2f(grid, 0.0, 1.0, grid, 0.0, 1.0);
+    glEvalMesh2(type, 0, grid, 0, grid);
+    glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
+      &q[0][0][0]);
+    glEvalMesh2(type, 0, grid, 0, grid);
+    if (i < 6) {
+      glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
+        &r[0][0][0]);
+      glEvalMesh2(type, 0, grid, 0, grid);
+      glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
+        &s[0][0][0]);
+      glEvalMesh2(type, 0, grid, 0, grid);
+    }
+  }
+  glPopAttrib();
+}
+
+
+// Now the OSG wrapper for the above OpenGL code, the most complicated bit is computing
+// the bounding box for the above example, normally you'll find this the easy bit.
+class Teapot : public osg::Drawable
+{
+    public:
+        Teapot() {}
+
+        /** Copy constructor using CopyOp to manage deep vs shallow copy.*/
+        Teapot(const Teapot& teapot,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY):
+            osg::Drawable(teapot,copyop) {}
+
+        META_Object(myTeapotApp,Teapot)
+
+
+        // the draw immediate mode method is where the OSG wraps up the drawing of
+        // of OpenGL primitives.
+        virtual void drawImmediateMode(osg::State&)
+        {
+            // teapot(..) doens't use vertex arrays at all so we don't need to toggle their state
+            // if we did we'd need to something like following call
+            // state.disableAllVertexArrays(), see src/osg/Geometry.cpp for the low down.
+        
+            // just call the OpenGL code.
+            teapot(14,GL_FILL);
+        }
+        
+        
+    protected:
+    
+        virtual ~Teapot() {}
+        
+        // we need to set up the bounding box of the data too, so that the scene graph knows where this
+        // objects is, for both positioning the camera at start up, and most importantly for culling.
+        virtual bool computeBound() const
+        {
+            _bbox.init();
+
+            // follow is some truely horrible code required to calculate the 
+            // bounding box of the teapot.  Have used the original code above to do
+            // help compute it.
+            float p[4][4][3], q[4][4][3], r[4][4][3], s[4][4][3];
+            long i, j, k, l;
+
+            for (i = 0; i < 10; i++) {
+              for (j = 0; j < 4; j++) {
+                for (k = 0; k < 4; k++) {
+                
+                  for (l = 0; l < 3; l++) {
+                    p[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
+                    q[j][k][l] = cpdata[patchdata[i][j * 4 + (3 - k)]][l];
+                    if (l == 1)
+                      q[j][k][l] *= -1.0;
+                      
+                    if (i < 6) {
+                      r[j][k][l] =
+                        cpdata[patchdata[i][j * 4 + (3 - k)]][l];
+                      if (l == 0)
+                        r[j][k][l] *= -1.0;
+                      s[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
+                      if (l == 0)
+                        s[j][k][l] *= -1.0;
+                      if (l == 1)
+                        s[j][k][l] *= -1.0;
+                    }
+                  }
+                  
+                  _bbox.expandBy(osg::Vec3(p[j][k][0],p[j][k][1],p[j][k][2]));
+                  _bbox.expandBy(osg::Vec3(q[j][k][0],q[j][k][1],q[j][k][2]));
+
+                  if (i < 6)
+                  {
+                    _bbox.expandBy(osg::Vec3(r[j][k][0],r[j][k][1],r[j][k][2]));
+                    _bbox.expandBy(osg::Vec3(s[j][k][0],s[j][k][1],s[j][k][2]));
+                  }
+                  
+                  
+                }
+              }
+            }
+
+            _bbox_computed = true;
+            return true;
+        }
+};
+
+
+osg::Geode* createTeapot()
+{
+    osg::Geode* geode = osgNew osg::Geode();
+
+    // add the teapot to the geode.
+    geode->addDrawable( new Teapot );
+
+    // add a reflection map to the teapot.     
+    osg::Image* image = osgDB::readImageFile("Images/reflect.rgb");
+    if (image)
+    {
+        osg::Texture2D* texture = new osg::Texture2D;
+        texture->setImage(image);
+
+        osg::TexGen* texgen = new osg::TexGen;
+        texgen->setMode(osg::TexGen::SPHERE_MAP);
+
+        osg::StateSet* stateset = new osg::StateSet;
+        stateset->setTextureAttributeAndModes(0,texture,osg::StateAttribute::ON);
+        stateset->setTextureAttributeAndModes(0,texgen,osg::StateAttribute::ON);
+        
+        geode->setStateSet(stateset);
+    }
+   
+    return geode;
+}
+
+int main( int argc, char **argv )
+{
+
+    glutInit( &argc, argv );
+
+    // create the commandline args.
+    std::vector<std::string> commandLine;
+    for(int i=1;i<argc;++i) commandLine.push_back(argv[i]);
+
+    // create the viewer and the model to it.
+    osgGLUT::Viewer viewer;
+
+    viewer.setWindowTitle(argv[0]);
+
+ 
+    // configure the viewer from the commandline arguments, and eat any
+    // parameters that have been matched.
+    viewer.readCommandLine(commandLine);
+    
+
+    // add model to viewer.
+    viewer.addViewport( createTeapot() );
+
+    // register trackball maniupulators.
+    viewer.registerCameraManipulator(osgNew osgGA::TrackballManipulator);
+    
+    viewer.open();
+
+    viewer.run();
+
+    return 0;
+}