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0027739: Visualization, TKV3d - implement individual acceleration data structure for selection of 2D persistent objects

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Low-level selection algorithms has been improved to explicitly support 2D
transformation persistent objects. This patch generally touches:

1) SelectMgr_SelectableObjectSet - the lists of objects has been split onto three
subsets (regular, 3d-persistent, 2d-persistent). Each subset has individual BVH
tree. The algorithms are now have more flexibility to update only those trees
that is really required for actual camera state.

2) SelectMgr_ViewerSelector - explicitly supports Eye space selection operations
on BVH tree for 2d-persistent subset. Change of camera position does not
anymore affect acceleration data structure (BVH tree) of 2d-persistent selectable objects.

3) Other classes from SelectMgr have been fine-tuned to provide appropriate API.

Porting notes:

This patch touches very low-level selection classes. If the low-level features were used
the following modifications may need to be considered for porting:

1) Iteration over objects of SelectMgr_SelectableObjectSet should now
be implemented with corresponding Iterator class.

2) SelectMgr_BaseFrustum::ScaleAndTransform and derived classes return
Handle(SelectMgr_BaseFrustum) instead of NCollection_Handle<> type.

Small correction of test case for issue CR27739
This commit is contained in:
apl
2016-09-09 15:53:58 +03:00
committed by bugmaster
parent c10703215e
commit 099f351396
21 changed files with 765 additions and 557 deletions
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8
src/SelectMgr/SelectMgr_TriangularFrustumSet.cxx
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@@ -108,17 +108,17 @@ void SelectMgr_TriangularFrustumSet::Build (const TColgp_Array1OfPnt2d& thePoint
// as any negative value;
// - scale only is needed: @theTrsf must be set to gp_Identity.
// =======================================================================
NCollection_Handle<SelectMgr_BaseFrustum> SelectMgr_TriangularFrustumSet::ScaleAndTransform (const Standard_Integer theScale,
const gp_GTrsf& theTrsf)
Handle(SelectMgr_BaseFrustum) SelectMgr_TriangularFrustumSet::ScaleAndTransform (const Standard_Integer theScale,
const gp_GTrsf& theTrsf) const
{
SelectMgr_TriangularFrustumSet* aRes = new SelectMgr_TriangularFrustumSet();
Handle(SelectMgr_TriangularFrustumSet) aRes = new SelectMgr_TriangularFrustumSet();
for (SelectMgr_TriangFrustumsIter anIter (myFrustums); anIter.More(); anIter.Next())
{
aRes->myFrustums.Append (Handle(SelectMgr_TriangularFrustum)::DownCast (anIter.Value()->ScaleAndTransform (theScale, theTrsf)));
}
return NCollection_Handle<SelectMgr_BaseFrustum> (aRes);
return aRes;
}
// =======================================================================