Code where DownCast was applied to Handle of the type being not a base class of the target one is revised and (hopefully) corrected.
Code corrected following review remarks
GeomConvert::CurveToBSplineCurve() is called even for b-spline curves to ensure that result is non-periodic
Check for conic is corrected
Graphic3d_Group is now abstract class and should be instantiated
using Graphic3d_Structure::NewGroup() method.
Graphic3d_CGroup has been removed.
The groups list is no more duplicated within Graphic3d_Structure and OpenGl_Structure.
Removed unused/duplicated fields from Graphic3d_Group.
Prs3d_Presentation - remove redundnant field myCurrentGroup.
PrsMgr_Presentation3d::Erase(), ::Clear() - avoid possible NULL dereference.
OpenGl_GraphicDriver/Graphic3d_GraphicDriver - group management methods have been removed
(moved to Graphic3d_CStructure and Graphic3d_Group interfaces).
Graphic3d_Group::GroupPrimitivesAspect() - copy IsEmission flag
Fix wrong iterator
Fix compilation issues
License statement text corrected; compiler warnings caused by Bison 2.41 disabled for MSVC; a few other compiler warnings on 54-bit Windows eliminated by appropriate type cast
Wrong license statements corrected in several files.
Copyright and license statements added in XSD and GLSL files.
Copyright year updated in some files.
Obsolete documentation files removed from DrawResources.
Adding test case for this fix
Modification in order to avoid exception during destruction of AIS_InteractiveContext
Small modification for trihedron
Small modifications to avoid regressions
Cosmetic modification
Graphic3d_AspectFillArea3d: use Aspect_POM_Fill polygon offset mode by default
Graphic3d_Group: disable texture mapping if invalid texture ID is specified
AIS_InteractiveObject: remove Fill() method, polygon offset parameters
should be applied explicitly in Compute() method or by SetPolygonOffsets()
AIS_TexturedShape: Compute() now takes polygon offsets into account
