FGFS-4.1/OpenSceneGraph
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Added event handle to alter the RTT Camera's dimensions to follow the windows resizes.

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git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14806 16af8721-9629-0410-8352-f15c8da7e697
This commit is contained in:
Robert Osfield
2015-03-20 17:58:34 +00:00
parent 953828a817
commit 890aea9537
1 changed files with 54 additions and 0 deletions
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54
examples/osgdistortion/osgdistortion.cpp
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@@ -100,6 +100,58 @@ struct CommandLineOptions
}
};
class WindowResizedHandler : public osgGA::GUIEventHandler
{
public:
WindowResizedHandler()
{
}
virtual bool handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa, osg::Object* object, osg::NodeVisitor* nv)
{
osg::Camera* camera = dynamic_cast<osg::Camera*>(object);
if (!camera) return false;
const osg::FrameStamp* fs = nv->getFrameStamp();
if (ea.getEventType()==osgGA::GUIEventAdapter::RESIZE)
{
OSG_NOTICE<<"Window resized event context="<<ea.getGraphicsContext()<<" frameNumber = "<<fs->getFrameNumber()<<std::endl;
OSG_NOTICE<<" WindowX="<<ea.getWindowX()<<std::endl;
OSG_NOTICE<<" WindowY="<<ea.getWindowY()<<std::endl;
OSG_NOTICE<<" WindowWidth="<<ea.getWindowWidth()<<std::endl;
OSG_NOTICE<<" WindowHeight="<<ea.getWindowHeight()<<std::endl;
// reset the Camera and associated Texture's to make sure it tracks the new window size.
int width = ea.getWindowWidth();
int height = ea.getWindowHeight();
camera->setViewport(0, 0, width, height);
camera->setRenderingCache(0);
osg::Camera::BufferAttachmentMap& cbam = camera->getBufferAttachmentMap();
for(osg::Camera::BufferAttachmentMap::iterator itr = cbam.begin();
itr != cbam.end();
++itr)
{
osg::Camera::Attachment& attachment = itr->second;
if (attachment._texture.get())
{
osg::Texture2D* texture2D = dynamic_cast<osg::Texture2D*>(attachment._texture.get());
if (texture2D)
{
OSG_NOTICE<<"Resetting Texture size"<<std::endl;
texture2D->setTextureSize(width, height);
texture2D->dirtyTextureObject();
}
}
}
}
return false;
}
};
osg::Node* createDistortionSubgraph(CommandLineOptions& options, osg::Node* subgraph, const osg::Vec4& clearColour)
{
osg::Group* distortionNode = new osg::Group;
@@ -141,6 +193,8 @@ osg::Node* createDistortionSubgraph(CommandLineOptions& options, osg::Node* subg
camera->addChild(subgraph);
distortionNode->addChild(camera);
camera->addEventCallback(new WindowResizedHandler());
}
// set up the hud camera