Removed excess mechanism for invalidating presentations AIS_InteractiveObject::myRecomputeEveryPrs.
PrsMgr_PresentableObject::Update() has been deprecated and replaced by PrsMgr_PresentableObject::UpdatePresentations()
recomputing only explicitly invalidated presentations.
Graphic3d_AspectFillArea3d, Graphic3d_AspectLine3d, Graphic3d_AspectMarker3d
and Graphic3d_AspectText3d have been merged into new class Graphic3d_Aspects.
The old classes are preserved as dummy sub-classes of Graphic3d_Aspects
preserving different per-aspect defaults.
Methods IsGroupPrimitivesAspectSet(), GroupPrimitivesAspect(), FillAreaAspect(),
LineAspect() and MarkerAspect() have been removed from Graphic3d_Group.
Instead, a new method Graphic3d_Group::ReplaceAspects() has been introduced
for replacing existing group aspects.
AIS_Shape now uses new method AIS_InteractiveObject::replaceAspects()
for updating computed groups with new aspects without presentation recomputation
in places where SynchronizeAspects() is not applicable.
OpenGl_AspectFace, OpenGl_AspectLine, OpenGl_AspectMarker
and OpenGl_AspectText have been merged into new class OpenGl_Aspects.
ViewerTest::parseColor() - fix uninitialized alpha component.
Graphic3d_AspectText3d/Prs3d_TextAspect - removed unused properties Space, ExpansionFactor, Angle.
Remove getters Values() deprecated since OCCT 7.1.0.
1) Added method Graphic3d_Camera::FrustumPoints() returning corner points of camera frustum.
2) Refactored methods OpenGl_BVHTreeSelector::isFullOut(...) and OpenGl_BVHTreeSelector::CacheClipPtsProjections()
3) Changed computation algorithm of frustum planes (build them by corner points)
4) Added interactive object AIS_CameraFrustum to draw camera frustum.
5) Extended Draw command "vcamera" with option displaying camera frustum.
