FGFS-4.1/OpenSceneGraph
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Added AdjustSphereSegmentCallback to provide '<' and '>' key controls over the azim and elev range of the sphere segment

Browse Source
This commit is contained in:
Robert Osfield 2016-08-25 10:25:49 +01:00
parent a87a6f0851
commit a1ab1a0ecc
1 changed files with 47 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
examples/osgspheresegment/osgspheresegment.cpp
View File

@ -354,6 +354,51 @@ osg::Vec3 computeTerrainIntersection(osg::Node* subgraph,float x,float y)
}
class AdjustSphereSegmentCallback : public osgGA::GUIEventHandler
{
public:
void scaleSphereSegment(osgSim::SphereSegment* ss, float scale)
{
if (!ss) return;
osg::Vec3 direction_vec;
float azRange, elevRange;
ss->getArea(direction_vec, azRange, elevRange);
OSG_NOTICE<<std::endl<<"AdjustSphereSegmentCallback : scaling azRange"<<azRange<<", scale="<<scale<<std::endl;
ss->setArea(direction_vec, azRange*scale, elevRange*scale);
}
virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& /*aa*/, osg::Object* object, osg::NodeVisitor* /*nv*/)
{
if (ea.getHandled()) return false;
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::KEYDOWN):
{
if (ea.getKey()=='>')
{
scaleSphereSegment(dynamic_cast<osgSim::SphereSegment*>(object), 1.1f);
return true;
}
else if (ea.getKey()=='<')
{
scaleSphereSegment(dynamic_cast<osgSim::SphereSegment*>(object), 1.0f/1.1f);
}
break;
}
default:
break;
}
return false;
}
};
//////////////////////////////////////////////////////////////////////////////
// MAIN SCENE GRAPH BUILDING FUNCTION
//////////////////////////////////////////////////////////////////////////////
@ -605,6 +650,8 @@ void build_world(osg::Group *root, unsigned int testCase, bool useOverlay, osgSi
ss->getParent(0)->addChild(ss->computeIntersectionSubgraph(terrainToSS, terrainGeode.get()));
}
ss->setEventCallback(new AdjustSphereSegmentCallback);
}
}