【添加box,sphere等图元】

1.定义处理器Geode;

2.定义图元形状Shape:box,sphere,....；

3.将图元形状添加到可拉形状ShapeDrawable(Shape,hints);

4.将可拉形状添加到处理器.GeodeGeode->addDrawable(ShapeDrawable);

5.将处理器添加到视口viewer->setSceneData(Geode);

osg::ref_ptr<osg::TessellationHints> hints = new osg::TessellationHints;
osg::ref_ptr<osg::Geode> geode = new osg::Geode;
osg::ref_ptr<osgViewer::Viewer> viewer = new osgViewer::Viewer;
osg::ref_ptr<osg::ShapeDrawable> shape = new osg::ShapeDrawable(new osg::Box(osg::Vec3(0.0,0.0,0.0),1.0,10.0,10.0),hints.get());
shape->setColor(osg::Vec4(0.5,0.5,0.5,0.1));
	
hints->setDetailRatio(0.5);
geode->addDrawable(shape.get());
viewer->setSceneData(geode);

【添加材质】

1.定义Material设置光照setAmbient，setDiffuse，setSpecular，setShininess

2.设置打开材质ON

osg::ref_ptr<osg::Material> material = new osg::Material;

//设置材质
material->setAmbient(osg::Material::FRONT_AND_BACK, osg::Vec4(1.0, 1.0, 1.0, 0.5));
material->setDiffuse(osg::Material::FRONT_AND_BACK, osg::Vec4(1.0,1.0,1.0, 0.5));
material->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4(1.0, 1.0, 1.0, 0.5));
material->setShininess(osg::Material::FRONT_AND_BACK, 60.0);
geode->getOrCreateStateSet()->setAttributeAndModes(material.get(), osg::StateAttribute::ON);

【设置纹理】

1.定义纹理texture2D

2.定义纹理图片Image

3.添加图片源到纹理图片

4.将纹理图片设为纹理

5.设置处理器纹理属性打开ON并绑定纹理

osg::ref_ptr<osg::Texture2D> texture2D = new osg::Texture2D;
osg::ref_ptr<osg::Image> image = new osg::Image;

//设置纹理
image = osgDB::readImageFile("C:\\Users\\Hasee\\Pictures\\Camera Roll\\相册\\人生若只如初见.jpg");
if (image->valid())
{
	texture2D->setImage(image);
	geode->getOrCreateStateSet()->setTextureAttributeAndModes(0,texture2D.get(), osg::StateAttribute::ON);
}

//设置透明度
geode->getOrCreateStateSet()->setMode(GL_BLEND, osg::StateAttribute::ON);
//深度测试
geode->getOrCreateStateSet()->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);