OSG 透明度

最新推荐文章于 2025-01-21 10:55:11 发布

原创最新推荐文章于 2025-01-21 10:55:11 发布 · 3k 阅读

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osg 打开透明度

#include <osg/Node>
#include <osgViewer/Viewer>
#include <osgDB/ReadFile>
#include <osg/ShapeDrawable>
osg::ref_ptr<osg::Node>createBoxA()
{
  osg::ref_ptr<osg::Geode>gnode=new osg::Geode;
  osg::ref_ptr<osg::ShapeDrawable>sd=new osg::ShapeDrawable(new osg::Box(osg::Vec3(0,-10,0),15,2,14));
  gnode->addDrawable(sd.get());

  sd->setColor(osg::Vec4(0,0.,0.5,0.3f));
  gnode->getOrCreateStateSet()->setMode(GL_BLEND,osg::StateAttribute::ON);
  gnode->getOrCreateStateSet()->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
  return gnode;
}
osg::ref_ptr<osg::Node>createBoxB()
{
  osg::ref_ptr<osg::Geode>geode=new osg::Geode;

  osg::ref_ptr<osg::ShapeDrawable>sd=new osg::ShapeDrawable(new osg::Box(osg::Vec3(0,10,0),10,2,15));
  geode->getOrCreateStateSet()->setMode(GL_BLEND,osg::StateAttribute::ON);
  geode->getOrCreateStateSet()->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
  geode->addDrawable(sd);
  sd->setColor(osg::Vec4(1,0,1.0,0.3));
  return geode;
}
int main(int argc, char *argv[])
{
  osg::ref_ptr<osgViewer::Viewer>viewer =new osgViewer::Viewer;
  osg::ref_ptr<osg::Group>root=new osg::Group;
  root->addChild(osgDB::readNodeFile("cow.osg"));
  root->addChild(createBoxB());
  root->addChild(createBoxA());
  viewer->setSceneData(root.get());
  return viewer->run();
}