void Stage01::InitBackgroundObjects()
{
auto engine = STGEngine::GetInstance();
Ptr<Mesh> roadMesh = Ptr<Mesh>::New();
auto& vertices = roadMesh->GetVertices();
vertices.push_back(Vector3f(-10000, 0, -10000));
vertices.push_back(Vector3f(10000, 0, -10000));
vertices.push_back(Vector3f(-10000, 0, 10000));
vertices.push_back(Vector3f(10000, 0, 10000));
auto& normals = roadMesh->GetNormals();
normals.push_back(Vector3f(0, 1, 0));
normals.push_back(Vector3f(0, 1, 0));
normals.push_back(Vector3f(0, 1, 0));
normals.push_back(Vector3f(0, 1, 0));
auto& uv = roadMesh->GetUV();
uv.push_back(Vector2f(-100, -100));
uv.push_back(Vector2f(100, -100));
uv.push_back(Vector2f(-100, 100));
uv.push_back(Vector2f(100, 100));
auto& indices = roadMesh->GetTriangles();
indices.push_back(0);
indices.push_back(1);
indices.push_back(2);
indices.push_back(1);
indices.push_back(2);
indices.push_back(3);
Material roadMaterial;
roadMaterial.texture = texRoad;
roadMesh->SetMaterial(roadMaterial);
Ptr<MeshObject> road = Ptr<MeshObject>::New();
road->SetMesh(roadMesh);
engine->AddBackgroundObject(road.Get());
CreateHouses();
}
int main( int argc, char **argv )
{
// use an ArgumentParser object to manage the program arguments.
osg::ArgumentParser arguments(&argc,argv);
// construct the viewer.
osgViewer::Viewer viewer;
// add local test manipulator more suitable for testing impostors.
viewer.setCameraManipulator(new TestManipulator);
// load the nodes from the commandline arguments.
osg::ref_ptr<osg::Node> model = osgDB::readRefNodeFiles(arguments);
if (model)
{
// the osgSim::InsertImpostorsVisitor used lower down to insert impostors
// only operators on subclass of Group's, if the model top node is not
// a group then it won't be able to insert an impostor. We therefore
// manually insert an impostor above the model.
if (dynamic_cast<osg::Group*>(model.get())==0)
{
const osg::BoundingSphere& bs = model->getBound();
if (bs.valid())
{
osgSim::Impostor* impostor = new osgSim::Impostor;
// standard LOD settings
impostor->addChild(model.get());
impostor->setRange(0,0.0f,1e7f);
impostor->setCenter(bs.center());
// impostor specific settings.
impostor->setImpostorThresholdToBound(5.0f);
model = impostor;
}
}
// we insert an impostor node above the model, so we keep a handle
// on the rootnode of the model, the is required since the
// InsertImpostorsVisitor can add a new root in automatically and
// we would know about it, other than by following the parent path
// up from model. This is really what should be done, but I'll pass
// on it right now as it requires a getRoots() method to be added to
// osg::Node, and we're about to make a release so no new features!
osg::ref_ptr<osg::Group> rootnode = new osg::Group;
rootnode->addChild(model);
// now insert impostors in the model using the InsertImpostorsVisitor.
osgSim::InsertImpostorsVisitor ov;
// traverse the model and collect all osg::Group's and osg::LOD's.
// however, don't traverse the rootnode since we want to keep it as
// the start of traversal, otherwise the insertImpostor could insert
// and Impostor above the current root, making it nolonger a root!
model->accept(ov);
// insert the Impostors above groups and LOD's
ov.insertImpostors();
}
else
{
// no user model so we'll create our own world.
model = Root = new osg::Group();
CreateHouses();
LayoutAsGrid();
}
// add model to viewer.
viewer.setSceneData(model);
return viewer.run();
}
