Ümit Uzun wrote:
As you said I hold different rotation Matrix for each Axis,
No, what I said was to keep each axis rotation angle in a separate
variable, then construct the matrices from the two values.
float angleX( 0.f ), angleY( 0.f );
angleX += 10.f;
mt->setMatrix( osg::Matrix::rotate( around x ) *
osg::Matrix::rotate( around y );
andleY += 10.f;
mt->setMatrix( osg::Matrix::rotate( around x ) *
osg::Matrix::rotate( around y );
andleX -= 10.f;
mt->setMatrix( osg::Matrix::rotate( around x ) *
osg::Matrix::rotate( around y );
andleY -= 10.f;
mt->setMatrix( osg::Matrix::rotate( around x ) *
osg::Matrix::rotate( around y );
This still might not produce an exact identity matrix due to floating
point roundoff errors, but it will be effectively identity. Rather that
ask the matrix if it is identity, a faster and more accurate check would
be to compare the angleX and angleY values against some epsilon near zero.
-Paul
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