Hello Antonio,
Antonio Bleile wrote:
> > You can override an Action's callbacks on a per instance basis
> > (registerEnterFunction, registerLeaveFunction), so you can create a
> > regular RenderAction and register a different callback for geometry.
> > That callback would basically do the same as the regular one, but only
> > after testing that the node has no children.
>
> OK, and here's the problem:
>
> Action::ResultE myTraverse(CNodePtr & Cnode, Action *action)
> {
> OSG::NodePtr node = action->getActNode();
>
> if( node->getNChildren() )
> return Action::Skip;
> else
> return Action::Continue;
> }
ah, well it is a bit more work than that ;)
You need to duplicate and modify the callback for Geometry, which is
MaterialDrawable::renderActionHandler (see below). In there you check
the node for children and if it has any you just return Action::Continue
otherwise do the usual thing:
Action::ResultE
MaterialDrawable::renderActionHandler(Action *action)
{
RenderAction *a = dynamic_cast<RenderAction *>(action);
// BEGIN inserted code
OSG::NodePtr node = action->getActNode();
if(node->getNChildren() > 0)
return Action::Continue;
// END inserted code
Material::DrawFunctor func;
func = osgTypedMethodFunctor1ObjPtr(this,
&MaterialDrawable::drawPrimitives);
Material* m = a->getMaterial();
if(m == NULL)
{
if(getMaterial() != NullFC)
{
m = getMaterial().getCPtr();
}
else
{
m = getDefaultMaterial().getCPtr();
FNOTICE(("MaterialDrawable::render: no Material!?!\n"));
}
}
a->dropFunctor(func, m);
return Action::Continue;
}
Hope it helps,
Carsten
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