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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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13
src/SelectMgr/SelectMgr_SelectingVolumeManager.hxx
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@@ -46,8 +46,11 @@ 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.
//! Builder is an optional argument that represents corresponding settings for re-constructing transformed
//! frustum from scratch. Can be null if reconstruction is not expected furthermore.
Standard_EXPORT virtual SelectMgr_SelectingVolumeManager ScaleAndTransform (const Standard_Integer theScaleFactor,
const gp_GTrsf& theTrsf);
const gp_GTrsf& theTrsf,
const Handle(SelectMgr_FrustumBuilder)& theBuilder = NULL) const;
Standard_EXPORT virtual Standard_Integer GetActiveSelectionType() const Standard_OVERRIDE;
@@ -71,7 +74,7 @@ public:
//! @return current world view transformation common for all selecting volumes
Standard_EXPORT const Graphic3d_Mat4d& WorldViewMatrix() const;
Standard_EXPORT void WindowSize (Standard_Integer& theWidth, Standard_Integer& theHeight);
Standard_EXPORT void WindowSize (Standard_Integer& theWidth, Standard_Integer& theHeight) const;
//! @return current camera world view projection transformation state common for all selecting volumes
Standard_EXPORT const Graphic3d_WorldViewProjState& WorldViewProjState() const;
@@ -189,8 +192,8 @@ public:
private:
enum { Frustum, FrustumSet, VolumeTypesNb }; //!< Defines the amount of available selecting volumes
NCollection_Handle<SelectMgr_BaseFrustum> mySelectingVolumes[VolumeTypesNb]; //!< Array of selecting volumes
Standard_Boolean myToAllowOverlap; //!< Defines if partially overlapped entities will me detected or not
Handle(SelectMgr_BaseFrustum) mySelectingVolumes[VolumeTypesNb]; //!< Array of selecting volumes
Standard_Boolean myToAllowOverlap; //!< Defines if partially overlapped entities will me detected or not
};
#endif
#endif