OpenSceneGraph三维渲染引擎设计与实践_source源码

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/* -*-c++-*- Copyright （C） 2009 Wang Rui 
 * OpenSceneGraph Engine Book - Design and Implementation
 * How to create a billboard forest
*/

#include 
#include 
#include 
#include 

#define RAND（min max） （（min） + （double）rand（）/（RAND_MAX+1）*（（max）-（min）））

void createTrees（ osg::Billboard& root ）
{
    root.getOrCreateStateSet（）->setRenderingHint（ osg::StateSet::TRANSPARENT_BIN ）;
    root.getOrCreateStateSet（）->setMode（ GL_LIGHTING osg::StateAttribute::OFF ）;
    
    osg::ref_ptr texture = new osg::Texture2D（ osgDB::readImageFile（“tree.rgba“） ）;
    for （ unsigned int i=0; i<200; ++i ）
    {
        osg::ref_ptr tree =
            osg::createTexturedQuadGeometry（ osg::Vec3（000） osg::Vec3（RAND（0.51.5）00） osg::Vec3（00RAND（1.02.0）） ）;
        tree->getOrCreateStateSet（）->setTextureAttributeAndModes（ 0 texture.get（） ）;
        
        root.addDrawable（ tree.get（） osg::Vec3（RAND（-1010） RAND（-1010） 0.0） ）;
    }
}

int main（ int argc char** argv ）
{
    osg::ref_ptr treeGeode = new osg::Billboard;
    treeGeode->setMode（ osg::Billboard::POINT_ROT_EYE ）;
    createTrees（ *treeGeode ）;
    
    osgViewer::Viewer viewer;
    viewer.setSceneData（ treeGeode.get（） ）;
    return viewer.run（）;
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

    .......      1399  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\billboard\billboard.cpp

    .......       571  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\billboard\CMakeLists.txt

    .......      1523  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\birdseye\birdseye.cpp

    .......       640  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\birdseye\CMakeLists.txt

    .......      1272  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\bitmap\bitmap.cpp

    .......       640  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\bitmap\CMakeLists.txt

    .......      2078  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\callback\callback.cpp

    .......       642  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\callback\CMakeLists.txt

    .......      2442  2009-11-22 08:56  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeLists.txt

    .......      2173  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\CustomModules.cmake

    .......      4182  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\FindOpenGL.cmake

    .......      1634  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\Findosg.cmake

    .......      1596  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\FindosgAnimation.cmake

    .......      1505  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\FindosgDB.cmake

    .......      1501  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\FindosgFX.cmake

    .......      1513  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\FindosgGA.cmake

    .......      1685  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\FindosgIntrospection.cmake

    .......      1661  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\FindosgManipulator.cmake

    .......      1595  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\FindosgParticle.cmake

    .......      1565  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\FindosgShadow.cmake

    .......      1513  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\FindosgSim.cmake

    .......      1571  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\FindosgTerrain.cmake

    .......      1511  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\FindosgText.cmake

    .......      1521  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\FindosgUtil.cmake

    .......      1551  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\FindosgViewer.cmake

    .......      1551  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\FindosgVolume.cmake

    .......      1602  2009-09-22 00:13  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\CMakeModules\FindosgWidget.cmake

    .......      5437  2009-11-22 08:41  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\data\0.JPG

    .......      3343  2009-11-22 08:41  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\data\1.JPG

    .......      5681  2009-11-22 08:41  OpenSceneGraph三维渲染引擎设计与实践_source\Examples\data\2.JPG

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