Hi, Cory
You can write technique for outline effect to use additional passes with
different settings, and add different cull masks to each pass, so you can use
effect node at top of your graph and apply masks on nodes to get correct effect
passes running on them.
You will need to change traverse method like this:
void traverse(osg::NodeVisitor& nv, osgFX::Effect* fx)
{
if (!getNumPasses())
{
define_passes();
}
osgUtil::CullVisitor *cv =
dynamic_cast<osgUtil::CullVisitor *>(&nv);
if (!cv) return;
unsigned int mask = cv->getTraversalMask();
for (unsigned i=0; i<getNumPasses(); ++i)
{
if (cv)
{
cv->pushStateSet(getPassStateSet(i));
}
if (i < masks.size())
{
cv->setTraversalMask(masks[i]);
fx->inherited_traverse(nv);
}
else
{
cv->setTraversalMask(mask);
fx->inherited_traverse(nv);
}
if (cv)
{
cv->popStateSet();
}
}
cv->setTraversalMask(mask);
}
masks is vector with traverse masks to be used by cull visitor for each pass.
Cheers,
Sergey.
23.06.2011, 23:18, "Cory Riddell" <[email protected]>:
> I've been playing with the osgFX classes and I'm thinking about using
> osgFX::Outline() to highlight the node(s) under the mouse.
>
> First, I would need a list of highlighted nodes. Initially it would be
> empty.
>
> Every highlightable node would have a parent osgFX::Outline instance
> with an initial thin black outline.
>
> I would handle osgGA::GUIEventAdapter::MOVE events. Using the
> osgUtil::LineSegmentIntersector to find what's under the mouse pointer.
> I would compare my list of nodes under the mouse pointer with my list of
> highlighted nodes. Any nodes on the highlighted list not under the
> mouse, would be reverted to a thin black outline. Any nodes under the
> mouse would get a thicker, yellow outline. The list of highlighted nodes
> would be updated to reflect the current state.
>
> Is this reasonable? Is having an osgFX::Outline instance on every node a
> heavy way of accomplishing this? Is hit-testing every move event crazy?
>
> Alternatively, I thought about just lightening the face color of every
> node under the mouse. This wouldn't require any osgFX::Outline() nodes.
>
> Thanks,
> Cory
> _______________________________________________
> osg-users mailing list
> [email protected]
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