Thank you Sergey. I knew there had to be a better way.
Cory
On 6/24/2011 7:00 AM, Sergey Polischuk wrote:
> 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]
>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
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