[osg-users] Flickering object material using osgFX::Cartoon

[Laura Mac]

Hi,

I am attempting to create a scene where I render all of my object meshes as 
children of the osgFX::Cartoon effect. When I apply the Cartoon effect, 
however, I notice that the material of all of my meshes begins to flicker and 
flash at a rapid rate. These are a few images which show an example of what the 
flickering looks like: http://imgur.com/a/AnbQf

Without the effect applied, none of the flickering occurs. What could be 
causing the flickering?

Thanks

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Re: [osg-users] Selecting objects

[Alexpux]

23 мая 2014 г., в 22:54, Trajce Nikolov NICK trajce.nikolov.n...@gmail.com 
написал(а):

 Hi Alexey
 
 I guess this is the problem, the material you are setting to the previous 
 selected model. Maybe you record the state before selection and set it back 
 when you select a new node
 

I’m try:

if (m_SelectedNode){
m_SelectedNode-setStateSet(clonedStateSet);
}
…..
if (node){
m_SelectedNode = node;
osg::Material* material = new osg::Material;
osg::StateSet* state = node-getOrCreateStateSet();
// save OSG-State
clonedStateSet = 
reinterpret_castosg::StateSet*(state-clone(osg::CopyOp::DEEP_COPY_ALL));
….
}

But have the same result as before.
 Nick
 
 
 On Fri, May 23, 2014 at 6:51 PM, Alexpux alex...@gmail.com wrote:
 Hi all!
 
 I’m new in OpenSceneGraph. I have big models exported from 3dmax and 
 materials from VRay (about 50 000 objects).
 I want highlight object on scene when clicking on it. Example with showing 
 bounding box work for me ok but I need
 to highlight object with, for example, green color and transparency.
 
 I modify handle function as:
 
 bool PickHandler::handle( const osgGA::GUIEventAdapter ea,
   osgGA::GUIActionAdapter aa )
 {
 if ( ea.getEventType()!=osgGA::GUIEventAdapter::RELEASE ||
  ea.getButton()!=osgGA::GUIEventAdapter::LEFT_MOUSE_BUTTON ||
  !(ea.getModKeyMask()osgGA::GUIEventAdapter::MODKEY_CTRL) )
 return false;
 
 osgViewer::View* viewer = dynamic_castosgViewer::View*(aa);
 if (viewer)
 {
 osg::ref_ptrosgUtil::LineSegmentIntersector ray =
 new osgUtil::LineSegmentIntersector(
 osgUtil::Intersector::WINDOW, ea.getX(), ea.getY()
 );
 osgUtil::IntersectionVisitor iv(ray.get());
 iv.setTraversalMask( ~0x1 );
 viewer-getCamera()-accept(iv);
 if (ray-containsIntersections())
 {
 osgUtil::LineSegmentIntersector::Intersection resInt = 
 *(ray-getIntersections().begin());
 osg::BoundingBox bb = resInt.drawable-getBound();
 osg::Vec3 worldCenter = bb.center() * 
 osg::computeLocalToWorld(resInt.nodePath);
 m_selectionBox-setMatrix(
 osg::Matrix::scale(bb.xMax()-bb.xMin(),
   bb.yMax()-bb.yMin(),
   bb.zMax()-bb.zMin()) *
 osg::Matrix::translate(worldCenter) );
 
 ///
 
 if (m_SelectedNode){
 osg::Material* rev_material = new osg::Material;
 osg::StateSet* rev_state = 
 m_SelectedNode-getOrCreateStateSet();
 rev_state-setMode(GL_BLEND,osg::StateAttribute::ON | 
 osg::StateAttribute::OVERRIDE);
 rev_material-setAlpha(osg::Material::FRONT_AND_BACK, 1);
 
 rev_state-setAttributeAndModes(rev_material,osg::StateAttribute::ON | 
 osg::StateAttribute::OVERRIDE);
 osg::BlendFunc* bf = new osg::BlendFunc( 
 osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA );
 rev_state-setAttributeAndModes(bf);
 
 m_SelectedNode-setStateSet(rev_state);
 m_SelectedNode=NULL;
 }
 osg::NodePath nodePath = resInt.nodePath;
 osg::Node* node = 
 (nodePath.size()=1)?nodePath[nodePath.size()-1]:0;
 osg::Group* parent = 
 (nodePath.size()=2)?dynamic_castosg::Group*(nodePath[nodePath.size()-2]):0;
 
 if (node) {
 m_SelectedNode = node;
 osg::Material* material = new osg::Material;
 osg::StateSet* state = node-getOrCreateStateSet();
 
 state-setMode(GL_BLEND,osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
 material-setAlpha(osg::Material::FRONT_AND_BACK, 0.6);
 state-setAttribute(material,osg::StateAttribute::ON | 
 osg::StateAttribute::OVERRIDE);
 osg::BlendFunc* bf = new osg::BlendFunc( 
 osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA );
 state-setAttribute(bf);
 state-setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
 state-setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 
 node-setStateSet(state);
 }
 
 ///
 }
 }
 return false;
 }
 
 When select object I have transparency on it. But when I select another 
 object I see that previous object lost it color and become grey.
 How I can restore previous state of object material?
 
 Regards,
 Alexey.
 
 
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