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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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6
src/SelectMgr/SelectMgr_BaseFrustum.hxx
View File

@@ -75,7 +75,7 @@ public:
const Standard_Integer theHeight);
Standard_EXPORT void WindowSize (Standard_Integer& theWidth,
Standard_Integer& theHeight);
Standard_Integer& theHeight) const;
//! Passes viewport parameters to builder
Standard_EXPORT void SetViewport (const Standard_Real theX,
@@ -109,8 +109,8 @@ public:
//! There are no default parameters, but in case if:
//! - transformation only is needed: @theScaleFactor must be initialized as any negative value;
//! - scale only is needed: @theTrsf must be set to gp_Identity.
Standard_EXPORT virtual NCollection_Handle<SelectMgr_BaseFrustum> ScaleAndTransform (const Standard_Integer /*theScaleFactor*/,
const gp_GTrsf& /*theTrsf*/) { return NULL; }
Standard_EXPORT virtual Handle(SelectMgr_BaseFrustum) ScaleAndTransform (const Standard_Integer /*theScaleFactor*/,
const gp_GTrsf& /*theTrsf*/) const { return NULL; }
//! SAT intersection test between defined volume and given axis-aligned box
Standard_EXPORT virtual Standard_Boolean Overlaps (const SelectMgr_Vec3& theBoxMin,