Re: [osg-users] MousepressEvent not able to capture from osg::Viewer by Qt
On 8.5.2013 7:04, Sujan Dasmahapatra wrote:
I am trying to implement a mouse press event with QT and OSG but
unable to do it. Pls help.
Below is my ViewerWidget class which is derived from QWidget and
osg::CompositeViewer..In the constructor I got gView which is a
osg::GLWidget, I am trying override mousePressEvent but when I click
message not coming. What I am doing wrong pls help..
[snip]
osg::Camera* ViewerWidget::createCamera( int x, int y, int w, int h,
const std::string name, bool windowDecoration )
{
osg::DisplaySettings* ds = osg::DisplaySettings::instance().get();
osg::ref_ptrosg::GraphicsContext::Traits traits = new
osg::GraphicsContext::Traits;
traits-windowName = name;
traits-windowDecoration = windowDecoration;
traits-x = x;
traits-y = y;
traits-width = w;
traits-height = h;
traits-doubleBuffer = true;
traits-alpha = ds-getMinimumNumAlphaBits();
traits-stencil = ds-getMinimumNumStencilBits();
traits-sampleBuffers = ds-getMultiSamples();
traits-samples = ds-getNumMultiSamples();
osg::ref_ptrosg::Camera camera = new osg::Camera;
camera-setGraphicsContext( new
osgQt::GraphicsWindowQt(traits.get()) );
camera-setClearColor( osg::Vec4(0.2, 0.2, 0.6, 1.0) );
camera-setViewport( new osg::Viewport(0, 0, traits-width,
traits-height) );
camera-setProjectionMatrixAsPerspective(
30.0f,
static_castdouble(traits-width)/static_castdouble(traits-height), 1.0f,
1.0f );
return camera.release();
}
I don't know why this code didn't crash, I think it should. Anyway, you
should create an instance of the CSGraphicsView somewhere within
createCamera:
CSGraphicsView* gView = new CSGraphicsView;
gView-setGeometry(x, y, w, h);
traits-inheritedWindowData = new osgQt::GraphicsWindowQt::WindowData(
gView );
...
or you can pass an instance of the CSGraphicsView to the
osgQt::GraphicsWindowQt constructor.
Robert Milharcic
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[osg-users] switch off mouse press events
In every example I see in the viewer that left mouse press and move cause it to rotate 3d, middle mouse press move cause it to pan, and left mouse press and move forward backward cause it zoom in and zoom out. How can I override this events. For example I dont want anything to happen on my left mouse. How can I achieve this?. Any help is highly appreciated. Thanks Sujan -- Thanks Regards Sujan ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] MousepressEvent not able to capture from osg::Viewer by Qt
Thanks Robert. It is working fine...
On the left mouse press I am showing a message using QMessagBox. But on the
middle mouse press was having pan and right mouse press was having zoom in
zoom out. How can I retain those functionalities. With this these
functionalities are gone.
void CSGraphicsView::mousePressEvent(QMouseEvent *e)
{
if(e-button()==Qt::LeftButton)
{
QMessageBox msg;
msg.setText(Mouse pressed);
msg.exec();
}
}
On Wed, May 8, 2013 at 3:59 PM, Robert Milharcic
robert.milhar...@ib-caddy.si wrote:
On 8.5.2013 7:04, Sujan Dasmahapatra wrote:
I am trying to implement a mouse press event with QT and OSG but unable
to do it. Pls help.
Below is my ViewerWidget class which is derived from QWidget and
osg::CompositeViewer..In the constructor I got gView which is a
osg::GLWidget, I am trying override mousePressEvent but when I click
message not coming. What I am doing wrong pls help..
[snip]
osg::Camera* ViewerWidget::createCamera( int x, int y, int w, int h,
const std::string name, bool windowDecoration )
{
osg::DisplaySettings* ds = osg::DisplaySettings::**
instance().get();
osg::ref_ptrosg::**GraphicsContext::Traits traits = new
osg::GraphicsContext::Traits;
traits-windowName = name;
traits-windowDecoration = windowDecoration;
traits-x = x;
traits-y = y;
traits-width = w;
traits-height = h;
traits-doubleBuffer = true;
traits-alpha = ds-getMinimumNumAlphaBits();
traits-stencil = ds-getMinimumNumStencilBits()**;
traits-sampleBuffers = ds-getMultiSamples();
traits-samples = ds-getNumMultiSamples();
osg::ref_ptrosg::Camera camera = new osg::Camera;
camera-setGraphicsContext( new
osgQt::GraphicsWindowQt(**traits.get())
);
camera-setClearColor( osg::Vec4(0.2, 0.2, 0.6, 1.0) );
camera-setViewport( new osg::Viewport(0, 0, traits-width,
traits-height) );
camera-**setProjectionMatrixAsPerspecti**ve(
30.0f, static_castdouble(traits-**
width)/static_castdouble(**traits-height), 1.0f, 1.0f );
return camera.release();
}
I don't know why this code didn't crash, I think it should. Anyway, you
should create an instance of the CSGraphicsView somewhere within
createCamera:
CSGraphicsView* gView = new CSGraphicsView;
gView-setGeometry(x, y, w, h);
traits-inheritedWindowData = new osgQt::GraphicsWindowQt::**WindowData(
gView );
...
or you can pass an instance of the CSGraphicsView to the
osgQt::GraphicsWindowQt constructor.
Robert Milharcic
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--
Thanks Regards
Sujan
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Re: [osg-users] switch off mouse press events
Hi Sujan, what you are describing is the normal behavior of the Trackball CameraManipulator. There are many ways how you can change processing of mouse events. Either remove the CameraManipulator (view-getCamera()-setCameraManipulator(0)) or inherit from the one CameraMainpulator that most suit your needs and override the processing of the events (handle method). If you have some specifics about how to handle mouse and keyboard events then go for the later, I would guess Nick On Wed, May 8, 2013 at 10:05 AM, Sujan Dasmahapatra sujan.dasmahapa...@gmail.com wrote: In every example I see in the viewer that left mouse press and move cause it to rotate 3d, middle mouse press move cause it to pan, and left mouse press and move forward backward cause it zoom in and zoom out. How can I override this events. For example I dont want anything to happen on my left mouse. How can I achieve this?. Any help is highly appreciated. Thanks Sujan -- Thanks Regards Sujan ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- trajce nikolov nick ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] switch off mouse press events
Thanks Trajce for your nice suggestions I am looking into it. Thanks a lot. On Wed, May 8, 2013 at 4:40 PM, Trajce Nikolov NICK trajce.nikolov.n...@gmail.com wrote: Hi Sujan, what you are describing is the normal behavior of the Trackball CameraManipulator. There are many ways how you can change processing of mouse events. Either remove the CameraManipulator (view-getCamera()-setCameraManipulator(0)) or inherit from the one CameraMainpulator that most suit your needs and override the processing of the events (handle method). If you have some specifics about how to handle mouse and keyboard events then go for the later, I would guess Nick On Wed, May 8, 2013 at 10:05 AM, Sujan Dasmahapatra sujan.dasmahapa...@gmail.com wrote: In every example I see in the viewer that left mouse press and move cause it to rotate 3d, middle mouse press move cause it to pan, and left mouse press and move forward backward cause it zoom in and zoom out. How can I override this events. For example I dont want anything to happen on my left mouse. How can I achieve this?. Any help is highly appreciated. Thanks Sujan -- Thanks Regards Sujan ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- trajce nikolov nick ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- Thanks Regards Sujan ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] MousepressEvent not able to capture from osg::Viewer by Qt
On 8.5.2013 10:16, Sujan Dasmahapatra wrote:
Thanks Robert. It is working fine...
On the left mouse press I am showing a message using QMessagBox. But
on the middle mouse press was having pan and right mouse press was
having zoom in zoom out. How can I retain those functionalities. With
this these functionalities are gone.
void CSGraphicsView::mousePressEvent(QMouseEvent *e)
{
if(e-button()==Qt::LeftButton)
{
QMessageBox msg;
msg.setText(Mouse pressed);
msg.exec();
}
}
Call base class implementation in a case where you need to retain
original functionality:
void CSGraphicsView::mousePressEvent(QMouseEvent *e)
{
if(e-button()==Qt::LeftButton)
{
QMessageBox msg;
msg.setText(Mouse pressed);
msg.exec();
}
else
GLWidget::mousePressEvent(e);
}
Also, calling frame on paintEvent might not be enough. You should also
call frame on every user input, on all mouse and keyboard events for
example... or you can mount a QTimer and make it call frame at some
interval.
Robert Milharcic
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Re: [osg-users] MousepressEvent not able to capture from osg::Viewer by Qt
Thats right Robert. Thanks a lot for your suggestions I appreciate it.
Thanks Sujan
On Wed, May 8, 2013 at 5:40 PM, Robert Milharcic
robert.milhar...@ib-caddy.si wrote:
On 8.5.2013 10:16, Sujan Dasmahapatra wrote:
Thanks Robert. It is working fine...
On the left mouse press I am showing a message using QMessagBox. But on
the middle mouse press was having pan and right mouse press was having zoom
in zoom out. How can I retain those functionalities. With this these
functionalities are gone.
void CSGraphicsView::mousePressEvent(QMouseEvent *e)
{
if(e-button()==Qt::LeftButton)
{
QMessageBox msg;
msg.setText(Mouse pressed);
msg.exec();
}
}
Call base class implementation in a case where you need to retain
original functionality:
void CSGraphicsView::mousePressEvent(QMouseEvent *e)
{
if(e-button()==Qt::LeftButton)
{
QMessageBox msg;
msg.setText(Mouse pressed);
msg.exec();
}
else
GLWidget::mousePressEvent(e);
}
Also, calling frame on paintEvent might not be enough. You should also
call frame on every user input, on all mouse and keyboard events for
example... or you can mount a QTimer and make it call frame at some
interval.
Robert Milharcic
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--
Thanks Regards
Sujan
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[osg-users] PointSprite Texture orientation
Hi all I use pointsprites to simulate precipitation (rain/snow). The implementation is completed and works very well. Now the end user decided to rotate the viewport about 90 degrees. The problem is now that the pointsprite texture coordinates to not take into accout the rotated viewport and the raindrops (small lines) are transversly and are not oriented in their falling direction. I tried to set a TexGen object in the stateset but what arguments do I have to set? Thank you! Cheers, Daniel -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=53959#53959 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Wish: convert osgGA::GUIEventAdapter to QKeySequence
I found Ctrl+Shift+0 is eaten by Windows to switch keyboards and may be disabled. I still wish the unmodified key was passed through for many purposes!!! -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=53960#53960 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] PointSprite Texture orientation
Hello Daniel, I don't know if I get the problem correctly. So what you want is essentially to rotate the texture on the pointsprite. I can think of various solutions: 1. Setup the TextureMatrix to represent your rotation in texture space. 2. Use a vertex shader to do the rotation your-self (e.g. in your case you might swap xy to yx) 3. Rotate the texture ;-) cheers Sebastian Hi all I use pointsprites to simulate precipitation (rain/snow). The implementation is completed and works very well. Now the end user decided to rotate the viewport about 90 degrees. The problem is now that the pointsprite texture coordinates to not take into accout the rotated viewport and the raindrops (small lines) are transversly and are not oriented in their falling direction. I tried to set a TexGen object in the stateset but what arguments do I have to set? Thank you! Cheers, Daniel -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=53959#53959 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] OcclusionQueryNode and Depth Splitting
Hi all, I am facing a problem when trying to use the occlusion query node while implementing Z splitting for rendering large scenes. I know osg has z splitting but I had to implement by my self since I have a separated frustum and projection system (projection matrices are placed within osg camera). I am currently trying this: 1) I made a pausable occlusion query node that can be paused and its current passed state reamains unchanged. 2) I render the whole scene using a very large frustum (represeting the sum of all partitions, i.e the original large frustum). 3) I pause all OQN by using a visitor. 4) Render the scene using the partitions and the pre-set occlusion state that was paused while rendering the partitions. It is not working not even for a single object.. it blinks non-stop... Does anyone has any suggestion? Does Openscenegraph currently supports Z-Splitting along with OQNodes? Thanks! -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=53962#53962 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] OpenCL context creation
Hi forum,
I believe that there are similar threads almost about this issue, but they did
not answer the problem i am having now. I have been the going through the
source of osgCuda and took the hint from it about context creation. I created a
separate class that handles all the OpenCL context creation from osg as follows:
Code:
osgOpenCLContext::osgOpenCLContext(): m_clContext(NULL),
m_clPlatform(NULL),
m_clDevice(NULL),
m_clCommandQueue(NULL)
{
}
osgOpenCLContext::~osgOpenCLContext()
{
if(m_clCommandQueue) clReleaseCommandQueue(m_clCommandQueue);
if(m_clContext) clReleaseContext(m_clContext);
}
bool osgOpenCLContext::setupOsgOpenCLAndViewer(osgViewer::ViewerBase viewer,
int ctxID /*= -1 */)
{
// You must use single threaded version since osgCompute currently
// does only support single threaded applications.
viewer.setThreadingModel( osgViewer::ViewerBase::SingleThreaded );
// Does create a single OpenGL context
// which is not released at the end of a frame to secure
// CUDA launches everywhere
viewer.setReleaseContextAtEndOfFrameHint(false);
// Create the current OpenGL context and make it current
if( !viewer.isRealized() )
viewer.realize();
osgViewer::ViewerBase::Contexts ctxs;
viewer.getContexts( ctxs, true );
if( ctxs.empty() )
{
osg::notify(osg::FATAL) __FUNCTION__ : no valid OpenGL context
is found.std::endl;
return false;
}
osg::GraphicsContext* ctx = NULL;
#ifdef WIN32
osgViewer::GraphicsHandleWin32 *windowsContext = NULL;
#else
osgViewer::GraphicsHandleX11 *linuxContext = NULL;
#endif
if( ctxID != -1 )
{ // Find context with ctxID and make it current.
for( unsigned int c=0; cctxs.size(); ++c )
{
if( ctxs[c]-getState()-getContextID() == ctxID )
{
ctx = ctxs[c];
}
}
}
else
{
ctx = ctxs.front();
}
if( NULL == ctx )
{
osg::notify(osg::FATAL) __FUNCTION__ : cannot find valid OpenGL
context.std::endl;
return false;
}
//platform dependent casting
#ifdef WIN32
windowsContext = dynamic_castosgViewer::GraphicsHandleWin32*(ctx);
if(NULL == windowsContext)
{
osg::notify(osg::FATAL) Win32 Graphics Context Casting is
unsuccessful std::endl;
return false;
}
else
osg::notify(osg::INFO) Win32 Graphics Context Casting is
successful std::endl;
#else
linuxContext = dynamic_castosgViewer::GraphicsHandleX11*(ctx);
if(NULL == linuxContext)
{
osg::notify(osg::FATAL) X11 Graphics Context Casting is
unsuccessful std::endl;
return false;
}
else
osg::notify(osg::INFO) X11 Graphics Context Casting is successful
std::endl;
#endif
cl_uint numPlatforms;
cl_platform_id *platformIDs;
cl_int errNum;
//first query the total number of platforms
errNum = clGetPlatformIDs(0,NULL,numPlatforms);
if(errNum != CL_SUCCESS || numPlatforms = 0)
{
osg::notify(osg::FATAL) Failed to find any OpenCL platform
std::endl;
return false;
}
//next, allocate memory for the installed platforms, and query
//to get the list
platformIDs = (cl_platform_id *)alloca(sizeof(cl_platform_id) *
numPlatforms);
errNum = clGetPlatformIDs(numPlatforms,platformIDs,NULL);
if(errNum != CL_SUCCESS)
{
osg::notify(osg::FATAL) Failed to find any OpenCL platform
std::endl;
return false;
}
//now choose the very first platform
m_clPlatform = platformIDs[0];
char cBuffer[1024];
//get the platform information from the selected platform
errNum =
clGetPlatformInfo(m_clPlatform,CL_PLATFORM_NAME,sizeof(cBuffer),cBuffer,NULL);
if(errNum == CL_SUCCESS)
{
osg::notify(osg::INFO) OpenCL platform name: cBuffer
std::endl;
}
//by now the graphics context is found
//and the platform id is also found
cl_context_properties contextProperties[] =
{
#ifdef WIN32
CL_GL_CONTEXT_KHR, (cl_context_properties)
windowsContext-getWGLContext(),
CL_WGL_HDC_KHR, (cl_context_properties) windowsContext-getHDC(),
#else
CL_GL_CONTEXT_KHR, (cl_context_properties) linuxContext-getContext(),
CL_GLX_DISPLAY_KHR, (intptr_t) linuxContext-getDisplay(),
#endif
CL_CONTEXT_PLATFORM, (cl_context_properties) m_clPlatform,
0
};
//create context with the
[osg-users] Translate problem
I am trying to translate my objects in scene, when the right mouse button
is pressed. But it is not moving. Pls check the snippet.
[code]
//CSGraphicsView
//.h
class CSGraphicsView : public osgQt::GLWidget
{
Q_OBJECT
public:
CSGraphicsView(QWidget* parent=0);
~CSGraphicsView();
virtual void mousePressEvent(QMouseEvent *e);
virtual void mouseReleaseEvent(QMouseEvent *e);
virtual void mouseMoveEvent(QMouseEvent *e);
};
#endif // GVIEW_H
.cpp
void CSGraphicsView::mousePressEvent(QMouseEvent *e)
{
if(e-button()==Qt::LeftButton)
{
QMessageBox msg;
msg.setText(Left Mouse pressed);
msg.exec();
}
else if(e-button()==Qt::RightButton)
{
//QMessageBox msg;
//msg.setText(Right Mouse pressed);
//msg.exec();
ViewerWidget* viewerWid = qobject_castViewerWidget*(parent());
viewerWid-getView()-getCamera()-setViewMatrix(::osg::Matrix::translate(1000.5,
0.0, 0.0));
}
else if(e-button()==Qt::MiddleButton)
{
QMessageBox msg;
msg.setText(Middle Mouse pressed);
msg.exec();
}
else
return;
}
//This is my ViewerWidget class
class ViewerWidget : public QWidget, public osgViewer::CompositeViewer
{
Q_OBJECT
public:
ViewerWidget(osgViewer::ViewerBase::ThreadingModel
threadingModel=osgViewer::CompositeViewer::SingleThreaded, osg::Group*
scene=NULL);
osgQt::GLWidget* addViewWidget( osg::Camera* camera, osg::Group* scene );
osg::Camera* createCamera( int x, int y, int w, int h, const std::string
name=, bool windowDecoration=false );
virtual void paintEvent( QPaintEvent* event );
osgViewer::View* getView();
protected:
QTimer _timer;
osgQt::GraphicsWindowQt* gw;
CSGraphicsView* gView;
osgViewer::View* view;
};
#endif // VIEWERWIDGET_H
//viewerwidget.cpp
ViewerWidget::ViewerWidget(osgViewer::ViewerBase::ThreadingModel
threadingModel, osg::Group* scene) : QWidget()
{
setThreadingModel(threadingModel);
gView = (CSGraphicsView*) (addViewWidget(
createCamera(0,0,100,100), scene ));
QGridLayout* grid = new QGridLayout;
grid-addWidget( gView, 0, 0 );
setLayout( grid );
connect( _timer, SIGNAL(timeout()), this, SLOT(update()) );
_timer.start( 10 );
}
osgQt::GLWidget* ViewerWidget::addViewWidget( osg::Camera* camera,
osg::Group* scene )
{
view = new osgViewer::View;
view-setCamera( camera );
addView( view );
view-setSceneData( scene );
view-addEventHandler( new osgViewer::StatsHandler );
view-setCameraManipulator( new osgGA::TrackballManipulator );
osg::ref_ptrosgGA::StateSetManipulator statesetManipulator = new
osgGA::StateSetManipulator(view-getCamera()-getStateSet());
view-addEventHandler(statesetManipulator.get());
gw = dynamic_castosgQt::GraphicsWindowQt* (
camera-getGraphicsContext() );
return gw ? gw-getGLWidget() : NULL;
}
osg::Camera* ViewerWidget::createCamera( int x, int y, int w, int h, const
std::string name, bool windowDecoration )
{
gView = new CSGraphicsView(this);
gView-setGeometry(x, y, w, h);
osg::DisplaySettings* ds = osg::DisplaySettings::instance().get();
osg::ref_ptrosg::GraphicsContext::Traits traits = new
osg::GraphicsContext::Traits;
traits-inheritedWindowData = new osgQt::GraphicsWindowQt::WindowData(
gView );
traits-windowName = name;
traits-windowDecoration = windowDecoration;
traits-x = x;
traits-y = y;
traits-width = w;
traits-height = h;
traits-doubleBuffer = true;
traits-alpha = ds-getMinimumNumAlphaBits();
traits-stencil = ds-getMinimumNumStencilBits();
traits-sampleBuffers = ds-getMultiSamples();
traits-samples = ds-getNumMultiSamples();
osg::ref_ptrosg::Camera camera = new osg::Camera;
camera-setGraphicsContext( new
osgQt::GraphicsWindowQt(traits.get()) );
camera-setClearColor( osg::Vec4(0.2, 0.2, 0.6, 1.0) );
camera-setViewport( new osg::Viewport(0, 0, traits-width,
traits-height) );
camera-setProjectionMatrixAsPerspective(
30.0f,
static_castdouble(traits-width)/static_castdouble(traits-height),
1.0f, 1.0f );
return camera.release();
}
void ViewerWidget::paintEvent( QPaintEvent* event )
{
frame();
}
osgViewer::View* ViewerWidget::getView()
{
return view;
}
[/code]
Please tell me why is it not moving ??.I want to implement a rotate
functionality on right mouse press button, a pan function on middle mouse
press function and a zoom function on wheel event. Any help is highly
appreciated. Thanks Sujan
--
Thanks Regards
Sujan
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