Hello Michael,
Michael Raab wrote:
this is strange. I'm running not exactly the same example that I sent you but
the changes I made to simplify shouldn't have any bigger impact.
I started to investigate the error in detail and this is what I got up to now:
- if I start only the client and 1 server no crash happens
- if I start more than one server the crash happens after each start
- your guess was right, one of the TileCameraDecoratorPtr::dcast() calls in
MultiDisplayWindow::serverRender() failes, the one in line 244
- the cast failed as serverWindow->getPort(sv) is a ProjectionCameraDecorator;
sv=2;
serverWindow->getPort(sv) is of type FBOViewport
clientPort->getType() is of type Viewport
Does this help? Any Suggestions?
I think I can reproduce it now if I resize a server window while
everything is running. It looks as if that confuses the code to skip
invisible viewports and somehow it handles an FBOViewport (with no TCD
added by MDW) as if it was a regular Viewport (which would have the TCD).
I've attached a patch for MDW that will make it report which ports are
created/skipped, can you apply that and run your servers with it, that
should give a better idea where the current code gets confused.
Cheers,
Carsten
Index: Source/System/Cluster/Window/MultiDisplay/OSGMultiDisplayWindow.cpp
===================================================================
RCS file: /cvsroot/opensg/OpenSG/Source/System/Cluster/Window/MultiDisplay/OSGMultiDisplayWindow.cpp,v
retrieving revision 1.25
diff -u -r1.25 OSGMultiDisplayWindow.cpp
--- Source/System/Cluster/Window/MultiDisplay/OSGMultiDisplayWindow.cpp 9 Jun 2008 07:30:36 -0000 1.25
+++ Source/System/Cluster/Window/MultiDisplay/OSGMultiDisplayWindow.cpp 1 Jul 2010 15:47:19 -0000
@@ -182,6 +182,9 @@
// then transmitting the texture doesn't seem like a good idea either.
if(serverWindow->getMFPort()->size() <= sv)
{
+ SLOG << "server id " << id << " sv " << sv << " cv " << cv
+ << " new virtual port" << std::endl;
+
serverPort = ViewportPtr::dcast(clientPort->shallowCopy());
beginEditCP(serverWindow);
serverWindow->addPort(serverPort);
@@ -190,8 +193,13 @@
else
{
serverPort = serverWindow->getPort(sv);
- if(serverWindow->getPort(sv)->getType() !=
- clientPort->getType())
+
+ SLOG << "server id " << id << " sv " << sv << " cv " << cv
+ << " existing virtual port " << serverPort->getType().getCName()
+ << " camera " << serverPort->getCamera()->getType().getCName()
+ << std::endl;
+
+ if(serverPort->getType() != clientPort->getType())
{
// there is a viewport with the wrong type
subRefCP(serverWindow->getPort(sv));
@@ -220,6 +228,23 @@
cbottom > top )
{
// invisible on this server screen
+ SLOG << " server id " << id << " skipping vp " << cv
+ << " cright " << cright << " left " << left
+ << " cleft " << cleft << " right " << right
+ << " ctop " << ctop << " bottom " << bottom
+ << " cbottom " << cbottom << " top " << top
+ << "\n "
+ << " px left " << clientPort->getPixelLeft()
+ << " px bot " << clientPort->getPixelBottom()
+ << " px right " << clientPort->getPixelRight()
+ << " px top " << clientPort->getPixelTop()
+ << "\n "
+ << " left " << clientPort->getLeft()
+ << " bot " << clientPort->getBottom()
+ << " right " << clientPort->getRight()
+ << " top " << clientPort->getTop()
+ << std::endl;
+
continue;
}
// calculate overlapping viewport
@@ -229,6 +254,9 @@
t = osgMin(ctop ,top ) - bottom;
if(serverWindow->getMFPort()->size() <= sv)
{
+ SLOG << "server id " << id << " sv " << sv << " cv " << cv
+ << " new port" << std::endl;
+
serverPort = ViewportPtr::dcast(clientPort->shallowCopy());
beginEditCP(serverPort);
deco=TileCameraDecorator::create();
@@ -241,9 +269,14 @@
else
{
serverPort = serverWindow->getPort(sv);
+
+ SLOG << "server id " << id << " sv " << sv << " cv " << cv
+ << " existing port " << serverPort->getType().getCName()
+ << " camera " << serverPort->getCamera()->getType().getCName()
+ << std::endl;
+
deco = TileCameraDecoratorPtr::dcast(serverPort->getCamera());
- if(serverWindow->getPort(sv)->getType() !=
- clientPort->getType())
+ if(serverPort->getType() != clientPort->getType())
{
// there is a viewport with the wrong type
subRefCP(serverWindow->getPort(sv));
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