NAME
SoToVRML2Action -
The SoToVRML2Action class builds a new scene graph, using only
VRML97/VRML2 nodes.
This action is used for converting a scene graph of VRML1/Coin nodes to
a new scene graph using only VRML97/VRML2 nodes.
SYNOPSIS
#include <Inventor/actions/SoToVRML2Action.h>
Inherits SoToVRMLAction.
Public Member Functions
SoToVRML2Action (void)
virtual ~SoToVRML2Action (void)
virtual void apply (SoNode *node)
virtual void apply (SoPath *path)
virtual void apply (const SoPathList &pathlist, SbBool obeysrules=0)
class SoVRMLGroup * getVRML2SceneGraph (void) const
void reuseAppearanceNodes (SbBool appearance)
SbBool doReuseAppearanceNodes (void) const
void reusePropertyNodes (SbBool property)
SbBool doReusePropertyNodes (void) const
void reuseGeometryNodes (SbBool geometry)
SbBool doReuseGeometryNodes (void) const
Static Public Member Functions
static void initClass (void)
Protected Member Functions
virtual void beginTraversal (SoNode *node)
Detailed Description
The SoToVRML2Action class builds a new scene graph, using only
VRML97/VRML2 nodes.
This action is used for converting a scene graph of VRML1/Coin nodes to
a new scene graph using only VRML97/VRML2 nodes.
Due to the basic differences between VRML1/Coin and VRML2 (the latter
does not really have a traversal state) the new scene graph will
typically be somewhat larger. To minimize this effect the action tries
to re-use nodes when possible.
VRML1 nodes will be converted to its direct equivalent VRML2 node,
while Coin nodes with no VRML2 equivalent are converted to
IndexedFaceSet. If the DrawStyle is POINTS, all geometry will be built
using PointSet; if it is LINES IndexedLineSet is used.
Here’s a basic usage example of this action, in the form of a complete,
stand-alone program:
#include <Inventor/SoDB.h>
#include <Inventor/SoInteraction.h>
#include <Inventor/SoInput.h>
#include <Inventor/SoOutput.h>
#include <Inventor/actions/SoWriteAction.h>
#include <Inventor/actions/SoToVRML2Action.h>
#include <Inventor/nodes/SoSeparator.h>
#include <Inventor/VRMLnodes/SoVRMLGroup.h>
int
main(int argc, char *argv[])
{
SoDB::init();
SoInteraction::init();
SoInput in;
in.openFile(argv[1]);
printf(’Reading...0);
SoSeparator *root = SoDB::readAll(&in);
if (root) {
root->ref();
SbString hdr = in.getHeader();
in.closeFile();
printf(’Converting...0);
SoToVRML2Action tovrml2;
tovrml2.apply(root);
SoVRMLGroup *newroot = tovrml2.getVRML2SceneGraph();
newroot->ref();
root->unref();
printf(’Writing...0);
SoOutput out;
out.openFile(’out.wrl’);
out.setHeaderString(’#VRML V2.0 utf8’);
SoWriteAction wra(&out);
wra.apply(newroot);
out.closeFile();
newroot->unref();
}
return 0;
}
Note: if VRML97 support is not present in the Coin library, this action
does nothing and getVRML2SceneGraph always returns NULL.
See also:
SoToVRMLAction
Since:
Coin 2.0
TGS Inventor 2.5
Constructor & Destructor Documentation
SoToVRML2Action::SoToVRML2Action (void) Constructor.
SoToVRML2Action::~SoToVRML2Action (void) [virtual] The destructor.
Member Function Documentation
void SoToVRML2Action::initClass (void) [static] Initializes the run-time
type system for this class, and sets up the enabled elements and action
method list.
Reimplemented from SoToVRMLAction.
void SoToVRML2Action::apply (SoNode * root) [virtual] Applies the action to
the scene graph rooted at root.
Note that you should not apply an action to a node with a zero
reference count. The behavior in that case is undefined.
Reimplemented from SoToVRMLAction.
void SoToVRML2Action::apply (SoPath * path) [virtual] Applies the action to
the parts of the graph defined by path.
Note that an SoPath will also contain all nodes that may influence e.g.
geometry nodes in the path. So for instance applying an
SoGLRenderAction on an SoPath will render that path as expected in the
view, where geometry will get its materials, textures, and other
appearance settings correctly.
If the path ends in an SoGroup node, the action will also traverse the
tail node’s children.
Reimplemented from SoToVRMLAction.
void SoToVRML2Action::apply (const SoPathList & pathlist, SbBool obeysrules
= 0) [virtual] Applies action to the graphs defined by pathlist. If
obeysrules is set to TRUE, pathlist must obey the following four
conditions (which is the case for path lists returned from search
actions for non-group nodes and path lists returned from picking
actions):
All paths must start at the same head node. All paths must be sorted in
traversal order. The paths must be unique. No path can continue through
the end point of another path.
See also:
SoAction::apply(SoPath * path)
Reimplemented from SoToVRMLAction.
SoVRMLGroup * SoToVRML2Action::getVRML2SceneGraph (void) const Return a
pointer to the root node of the generated scenegraph of only VRML2 /
VRML97 nodes.
Will return NULL if VRML97 support was not compiled into the library.
void SoToVRML2Action::reuseAppearanceNodes (SbBool appearance) Set the flag
deciding if appearance nodes should be reused if possible. The default
is FALSE.
Please note that support for reusing Appearance nodes is not
implemented yet.
SbBool SoToVRML2Action::doReuseAppearanceNodes (void) const Get the flag
deciding if appearance nodes should be reused if possible. The default
is FALSE.
Please note that support for reusing Appearance nodes is not
implemented yet, so this method will always return FALSE.
void SoToVRML2Action::reusePropertyNodes (SbBool property) Set the flag
deciding if property nodes should be reused if possible. The default is
FALSE.
SbBool SoToVRML2Action::doReusePropertyNodes (void) const Get the flag
deciding if property nodes should be reused if possible. The default is
FALSE.
void SoToVRML2Action::reuseGeometryNodes (SbBool geometry) Set the flag
deciding if geometry nodes should be reused if possible. The default is
FALSE.
Please note that support for reusing Geometry nodes is not implemented
yet.
SbBool SoToVRML2Action::doReuseGeometryNodes (void) const Get the flag
deciding if geometry nodes should be reused if possible. The default is
FALSE.
Please note that support for reusing Geometry nodes is not implemented
yet, so this function will always return FALSE.
virtual void SoToVRML2Action::beginTraversal (SoNode * node) [protected,
virtual] This virtual method is called from SoAction::apply(), and is
the entry point for the actual scenegraph traversal.
It can be overridden to initialize the action at traversal start, for
specific initializations in the action subclasses inheriting SoAction.
Default method just calls traverse(), which any overridden
implementation of the method must do too (or call
SoAction::beginTraversal()) to trigger the scenegraph traversal.
Reimplemented from SoToVRMLAction.
Author
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