OpenSceneGraph.ppt

1、OpenSceneGraph,Jinseok Seo,Outline,What is OpenSceneGraph? Getting Started Examples Loading geometric models from files and positioning them in a scene Finding named nodes, updating DOF and switch nodes Using an update callback to articulate a node within a scene Using tracking devices Available Res

2、ources,What is OpenSceneGraph?,A C+ API built on OpenGL for Scene Management Graphics Rendering Optimization Cross-platform Windowing system agnostic Open Source,What is OpenSceneGraph?,Functional Components,OSG Scene Graph Rendering Elements,OSGDB Data Base Loading Plug-in Management,OSGUtil Traver

3、sers Enhancements,OSGText,OSGSim,Node Kits,Plug-Ins,What is OpenSceneGraph?,File Formats Supported File Formats 3dc, 3ds, ac3, dw, flt, Freetype Iv, ive, logo, lwo, md2, obj osg, osgtgz, tgz, txp, directX, zip Image Formats Bmp, dds, pic, png pnm, qt, rgb, tga,What is OpenSceneGraph?,Who is Using OS

4、G? Magic Earth - Geoprobe - Oil & Gas Boeing - Flight simulation Indra - Train simulation STN Atlas - Simulation NASA - Earth visualization Norcontrol - Maritime simulation Real World Entertainment - Gaming (Releasing Java Bindings) Terrex - LOD Paging POSTECH - ,Getting Started,Downloading and Buil

5、ding Source Code 3rdParty_Win32binaries_2004-07-25a.zip OpenSceneGraph-Data.zip Optional (OpenGL Performer, GDAL, ) OSG_OP_OT-0.9.8-2.zip,Getting Started,Downloading and Installing Binaries Debian, MinGW, Mac OSX, IRIX, Suse 9.1, Fedora core 3 Win32 binaries http:/mew.cx

6、/osg Includes OpenSceneGraph-Data, 3rdParty dependencies, and osgVRPN,Getting Started,Compiling with MS Visual Studio Visual Studio .NET Works well Visual Studio 6.0 Install STLport-4.5 /download.html Uncomment the sentence at about line 45 in the file stlport/stl_user_config.h

7、#define _STL_NO_OWN_IOSTREAM 1 Setting up include path and library path,Getting Started,Running Examples Setting up the path to the applications and DLLs (PATH) where/you/put/OpenSceneGraph/bin Setting the OpenSceneGraph Data file path (OSG_FILE_PATH) Where/you/put/OpenSceneGraph-Data osgviewer cow.

8、osg,Examples,Jason McVeighs OpenSceneGraph Tutorial Set. /documentation/NPSTutorials/,Example 1,Loading geometric models from files and positioning them in a scene,Example 1,root (osg:Group),tankNode (osg:Node),tankXform (osg:PositionAttitudeTransform),Example 2,Finding named

9、 nodes, updating DOF and switch nodes,Example 2,root (osg:Group),tankTwoGroup (osg:Group),tankTwoPAT (osg:PositionAttitudeTransform),tankOneGroup (osg:Group),tankThreeGroup (osg:Group),tankThreePAT (osg:PositionAttitudeTransform),Example 3,Using an update callback to articulate a node within a scene,Example 4,Manually positioning a camera Create and initialize a matrix with the correct world position and orientation. Get the inverse of this matrix and Provide a world up orientation. In this case by rotating from Y up to Z up.,Example 5,Using tracking devices,Av