From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Tanguy Fautre Sent: Thursday 29 January 2009 12:23 To: OpenSceneGraph Users Subject: Re: [osg-users] MSVC v9 Apparently, it's also broken on VC8. I've reduced the size of the example program, removed the OSG dependency, and getting ready to submit to MS. T From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Tanguy Fautre Sent: Thursday 29 January 2009 11:43 To: OpenSceneGraph Users Subject: Re: [osg-users] MSVC v9 Hi Guy, I was able to reproduce the problem on my computer too. You got my colleagues and I quite puzzled. At this point it's very tempting to say it's a compiler bug. I'll do some more investigation. If you don't mind, I'll submit this bug to Microsoft if we cannot fix it. Tanguy From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Guy Wallis Sent: Thursday 29 January 2009 03:38 To: OpenSceneGraph Users Subject: [osg-users] MSVC v9 First, sorry Jan! I'm new to mailing lists and assumed that threads were generated on the basis of the subject line not who I replied to. Thanks for pointing out my mistake. Second, thanks to Tanguy and Ralph for suggestions. I'm using an old 2.8 Ghz Pentium 4 - so not a dual core problem. But the error does remind me of threading issues I used to have with multiprocessor IRIX machines. I tried using the volatile type qualifier but then I got a load of conversion errors because MSVC++ v9 didn't recognise the variable as an osg::Vec3 anymore: .\dodec.cpp(78) : error C2678: binary '-' : no operator found which takes a left-hand operand of type 'volatile osg::Vec3' (or there is no acceptable conversion) C:\Program Files\OpenSceneGraph\include\osg/Vec3f(152): could be 'const osg::Vec3f osg::Vec3f::operator -(const osg::Vec3f &) const' C:\Program Files\OpenSceneGraph\include\osg/Vec3f(167): or 'const osg::Vec3f osg::Vec3f::operator -(void) const' I've distilled the problem into a pretty simple program - I don't even need to pop up a window. Some things might look a little odd, but almost any changes from this point result in correct behaviour. I'm expecting a list of coordinates from (0.0, 0.0, 0.0) to (11.0, 11.0, 11.0) but as you'll hopefully see, I get the central part of the array not updating properly. #include <osg/Geometry> osg::Vec3 vc[12]; int main( int argc, char **argv ) { int a; osg::Vec3 vt[12], p; for(a=0;a<12;a++){ vc[a].set((float)a, (float)a, (float)a+1.0f); } p = osg::Vec3(0.0f,0.0f,1.0f); vt[0] = vc[0]-p; for(a=1;a<12;a++){ vt[a] = vc[a]-p; } for(a=0;a<12;a++){ printf("%5.2f %5.2f %5.2f\n", vt[a].x(), vt[a].y(), vt[a].z()); } return 0; } Two crucial steps are the vc[a]-p stage, and using the local variable vt for printing because otherwise the array updates correctly. Any ideas? Such as leave it for Microsoft to sort out! Thanks, Guy
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