Hi,
I have some very strange behaviour of my code. I am trying to cumulate the
matrices of a subgraph:
(don't know what these questionsmarks should be, maybe you don't see them at
all and it's a problem of firefox, but if you do, imagine spaces and inequality
signs instead, that's what I actually added here.)
Code:
Matrix m;
osg::MatrixTransform *transform = NULL;
for( osg::NodePath::iterator it = pathList[0].begin(); it !=
pathList[0].end(); ++it )
{
transform = dynamic_cast<osg::MatrixTransform*>( *it );
if( transform )
m.preMult( transform->getMatrix() );
}
This subgraph consists of three osg::MatrixTransforms. If I debug into this
loop I can see in the watch window (MSVS, which also displays the actual type
of the instance) that actually two of the three are just osg::Transforms (even
though I have created them as osg::MatrixTransforms) which prevents me from
casting and accessing the contained matrix. However I also can see there is a
member _matrix which suggests the type actually IS osg::MatrixTransform.
The transforms are created in the initializerlist of a constructor:
Code:
OsgArtTracking::ARNodes::ARNodes( osgART::Marker *marker, double scale,
bool insertAxes,
bool enableVisibilityCallback, bool
enableMarkerDebugCallback ) :
scaleNode( new osg::MatrixTransform() ),
fixCSNode( new osg::MatrixTransform( osg::Matrix::rotate( osg::PI / 2.0,
osg::Vec3( 1.0, 0.0, 0.0 ) ) ) ),
arTransform( new osg::MatrixTransform() ),
marker( marker )
{
...
all of them are osg::ref_ptrs:
Code:
osg::ref_ptr<osg::MatrixTransform> scaleNode;
osg::ref_ptr<osg::MatrixTransform> fixCSNode;
osg::ref_ptr<osg::MatrixTransform> arTransform;
If I debug into the constructor I can see that the osg::MatrixTransform
constructor is called on all of them. In the next line my debugger says they
are just osg::Transforms, also dynamiccasting them to osg::MatrixTransform
fails.
How is this even possible? Any ideas? (MSVC 9.0, no optimizations enabled,
mostly default settings of configuration "Debug")
Thanks,
Jason
------------------------
ithrak (Jason Fisher)
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=23114#23114
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