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0030698: Volume Rendering - Early clipping of volume object's bounding box

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Flag to control check of bounding box clipping before drawing has been added.
This commit is contained in:
iko 2019-05-07 15:44:39 +03:00 committed by bugmaster
parent 7c1a821000
commit 8e6ce38cf4
3 changed files with 15 additions and 7 deletions
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3
src/Graphic3d/Graphic3d_CStructure.cxx
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@ -39,7 +39,8 @@ Graphic3d_CStructure::Graphic3d_CStructure (const Handle(Graphic3d_StructureMana
IsMutable (Standard_False),
Is2dText (Standard_False),
myGraphicDriver (theManager->GraphicDriver()),
myIsCulled (Standard_True)
myIsCulled (Standard_True),
myBndBoxClipCheck(Standard_True)
{
Id = myGraphicDriver->NewIdentification();
}

7
src/Graphic3d/Graphic3d_CStructure.hxx
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@ -145,6 +145,12 @@ public:
//! The method is called during traverse of BVH tree.
void MarkAsNotCulled() const { myIsCulled = Standard_False; }
//! Returns whether check of object's bounding box clipping is enabled before drawing of object; TRUE by default.
Standard_Boolean BndBoxClipCheck() const { return myBndBoxClipCheck; }
//! Enable/disable check of object's bounding box clipping before drawing of object.
void SetBndBoxClipCheck(Standard_Boolean theBndBoxClipCheck) { myBndBoxClipCheck = theBndBoxClipCheck; }
//! Checks if the structure should be included into BVH tree or not.
Standard_Boolean IsAlwaysRendered() const
{
@ -224,6 +230,7 @@ protected:
Handle(Graphic3d_PresentationAttributes) myHighlightStyle; //! Current highlight style; is set only if highlight flag is true
mutable Standard_Boolean myIsCulled; //!< A status specifying is structure needs to be rendered after BVH tree traverse
Standard_Boolean myBndBoxClipCheck; //!< Flag responsible for checking of bounding box clipping before drawing of object
public:

12
src/OpenGl/OpenGl_Structure.cxx
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@ -527,16 +527,16 @@ void OpenGl_Structure::Render (const Handle(OpenGl_Workspace) &theWorkspace) con
}
const Graphic3d_ClipState aBoxState = aPlane->ProbeBox (aBBox);
if (aBoxState == Graphic3d_ClipState_Out)
{
isClipped = true;
break;
}
else if (aBoxState == Graphic3d_ClipState_In)
if (aBoxState == Graphic3d_ClipState_In)
{
aCtx->ChangeClipping().SetEnabled (aPlaneIt, false);
hasDisabled = true;
}
else if (aBoxState == Graphic3d_ClipState_Out && myBndBoxClipCheck)
{
isClipped = true;
break;
}
}
}