Action::ResultE PhysicsHandlerFinder::check(NodePtr& node)
{
AttachmentPtr a = node->findAttachment(PhysicsHandler::getClassType());
if(a!=NullFC)
{
_found = PhysicsHandlerPtr::dcast(a);
return Action::Quit;
}
return Action::Continue;
}
Action::ResultE check(NodePtr& node)
{
AttachmentPtr a = node->findAttachment(Name::getClassType());
if(a != NullFC)
{
NamePtr n = NamePtr::dcast(a);
if(n->getField().getValue() == *_name)
{
_found = node;
return Action::Quit;
}
}
return Action::Continue;
}
/*
Aufruf dieser Funktion erfolgt bei Traversierung des Szenengraphen
mittels OpenSG-Funktion traverse().
Enthaelt ein Knoten verwertbare Geometrieinformation so tragen wir
Zeiger auf seine Geometrie (OpenSG-Strukturen) im array gla_meshInfo_
ein.
Nebenbei bestimmen wir für die Geometrie auch noch die World-Space-
Transformation (evtl. existiert eine OpenSG-Funktion um diese
Information zu erhalten, der Autor hat keine in der OpenSG-API
entdeckt).
*/
Action::ResultE enter(NodePtr &node)
{
int i, j, h;
Pnt3f v;
int numFaces, numFaceVertices, vId, size;
MeshInfo meshInfo;
TinyMatrix transf;
FaceIterator fit;
int numQuads;
NamePtr namePtr;
char name[255];
namePtr = NamePtr::dcast(node->findAttachment(Name::getClassType().getGroupId()));
if(namePtr == osg::NullFC)
strcpy(name, "");
else
{
strcpy(name, namePtr->getFieldPtr()->getValue().c_str());
}
SINFO << "Node name = '" << name << "'" << endl << endLog;
GeometryPtr geo = GeometryPtr::dcast(node->getCore());
if(geo != NullFC)
{
GeoPLengthsUI32Ptr pLength = GeoPLengthsUI32Ptr::dcast(geo->getLengths());
GeoPTypesUI8Ptr pTypes = GeoPTypesUI8Ptr::dcast(geo->getTypes());
/* pLength and pTypes should not be NullFC, however VRML Importer/Exporter
code is instable by now, so this can happen */
if((pLength != NullFC) && (pTypes != NullFC))
{
GeoPLengthsUI32::StoredFieldType * pLengthField = pLength->getFieldPtr();
GeoPTypesUI8::StoredFieldType * pTypeField = pTypes->getFieldPtr();
size = pLengthField->size();
for(h = 0; h < size; h++)
{
if(((*pTypeField)[h] == GL_TRIANGLES) ||
((*pTypeField)[h] == GL_QUADS))
{
/* may quads appear in GL_TRIANGLES ? */
/* check if all triangles have three vertices */
numQuads = 0;
fit = geo->beginFaces();
while(fit != geo->endFaces())
{
numFaceVertices = fit.getLength();
if(numFaceVertices == 4)
numQuads++;
if(numFaceVertices > 4)
{
SWARNING <<
"More than 4 vertices in face!" <<
endl <<
endLog;
return Action::Continue;
// exit(1);
}
++fit;
}
if(numQuads > 0)
{
SWARNING << "Quad encountered" << endl << endLog;
}
if(gl_sga->nodeDepth_ > 0)
{
for(i = 0; i < gl_sga->nodeDepth_; i++)
{
meshInfo.transf = meshInfo.transf * gl_sga->transf_[i];
}
}
else
meshInfo.transf.identity();
/* access to vertices */
GeoPositions3fPtr pPos = GeoPositions3fPtr::dcast(geo->getPositions());
GeoPositions3f::StoredFieldType * pPosField = pPos->getFieldPtr();
/* access to faces */
numFaces = 0;
fit = geo->beginFaces();
for(fit = geo->beginFaces(); fit != geo->endFaces(); ++fit)
{
numFaceVertices = fit.getLength();
for(j = 0; j < numFaceVertices; j++)
{
vId = fit.getPositionIndex(j);
}
numFaces++;
} /* for fit */
/* set other mesh attributes */
meshInfo.numQuads = numQuads;
meshInfo.geoPtr = geo;
meshInfo.vPtr = pPosField;
meshInfo.triangularFaces = (numQuads == 0);
meshInfo.numVertices = pPosField->size();
meshInfo.numFaces = numFaces;
gl_sga->meshInfo_.push_back(meshInfo);
gl_sga->numGeometryNodes_++;
}
else
{
// SWARNING << "Neither triangle nor quad. Field type = " <<
// (*pTypeField)[h] << endl << endLog;
}
} /* for h */
} /* if pLength!=NullFC */
}
else if(node->getCore()->getType().isDerivedFrom(Transform::getClassType()))
{
TransformPtr t = TransformPtr::dcast(node->getCore());
Matrix ma;
ma = t->getMatrix();
SINFO <<
"Node type derived from transform, skipping children" <<
endl <<
endLog;
for(i = 0; i < 4; i++)
{
for(j = 0; j < 4; j++)
{
transf[i][j] = ma[j][i]; /* the matrix is stored as columns/rows ? */
}
}
if(gl_sga->nodeDepth_ > gl_sga->maxNodeDepth_)
{
gl_sga->maxNodeDepth_ = gl_sga->nodeDepth_;
gl_sga->transf_.push_back(transf);
}
else
{
gl_sga->transf_[gl_sga->nodeDepth_] = transf;
}
gl_sga->nodeDepth_++;
}
return Action::Continue;
}
// Initialize GLUT & OpenSG and set up the scene
int main(int argc, char **argv)
{
// OSG init
osgInit(argc,argv);
// GLUT init
int winid = setupGLUT(&argc, argv);
// the connection between GLUT and OpenSG
GLUTWindowPtr gwin = GLUTWindow::create();
gwin->setId(winid);
gwin->init();
// load the scene
NodePtr scene;
if(argc < 2)
{
FWARNING(("No file given!\n"));
scene = makeTorus(.5, 2, 16, 16);
}
else
{
/*
All scene file loading is handled via the SceneFileHandler.
*/
scene = SceneFileHandler::the().read(argv[1]);
}
/*
An Attachment is a special field container that can be attached to many
of the internal classes like Nodes and NodeCores. There can be multiple
Attachments attached to an object.
Attachments can be attached to all FieldContainers that are derived from
AttachmentContainer. This includes most higher-level classes in the
system, like Nodes, NodeCores, Windows, Viewports etc.
The only predefined kind of Attachment is the Name, which can
keep the name of an object. Some of loaders (e.g. the WRL loader)
create these kinds of Attachments for named nodes.
*/
/*
An Attachment is a FieldContainer and as such needs to be created using
::create().
*/
NamePtr name = Name::create();
/*
The NameAttachment only has a single field, there's no need to use the
mask here.
*/
beginEditCP(name);
{
name->getField().setValue("Scene");
}
endEditCP (name);
/*
Attach the name to the scene node.
*/
beginEditCP(scene, Node::AttachmentsFieldMask);
{
scene->addAttachment(name);
}
endEditCP (scene, Node::AttachmentsFieldMask);
/*
Check if the scene has a Name attachment
Attachments are categorized by the GroupID of their class. Every
AttachmentContainer generally keeps only one attachment of a specific
kind.
*/
AttachmentPtr a;
a = scene->findAttachment(Name::getClassType());
if(a!=NullFC)
{
NamePtr n = NamePtr::dcast(a);
SLOG << "Node name: " << n->getField().getValue() << endl;
}
else
{
SLOG << "Node has no name!" << endl;
}
// use the finder helper to find a named object
finder f;
NodePtr found;
found = f.find(scene, "Scene");
SLOG << "Found object " << found << " named Scene." << endl;
found = f.find(scene, "TF_DETAIL");
if(found == NullFC)
{
SLOG << "Found no object named TF_DETAIL (did you load the tie?)."
<< endl;
}
else
{
SLOG << "Found object " << found << " named TF_DETAIL." << endl;
}
// Use the simple attachment defined above
MyAttachmentPtr mya = MyAttachment::create();
beginEditCP(mya);
{
mya->getField().setValue(42);
}
endEditCP (mya);
// attach it to the scene
beginEditCP(scene, Node::AttachmentsFieldMask);
{
scene->addAttachment(mya);
}
endEditCP (scene, Node::AttachmentsFieldMask);
// and check if it's still there
a = scene->findAttachment(MyAttachment::getClassType());
if(a!=NullFC)
{
MyAttachmentPtr m = MyAttachmentPtr::dcast(a);
SLOG << "Node my value: " << m->getField().getValue() << endl;
}
else
{
SLOG << "Node has no myAttachment!" << endl;
}
// create the SimpleSceneManager helper
mgr = new SimpleSceneManager;
// tell the manager what to manage
mgr->setWindow(gwin );
mgr->setRoot (scene);
// show the whole scene
mgr->showAll();
// GLUT main loop
glutMainLoop();
return 0;
}
