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0031579: Visualization - OpenGl_CappingAlgo performance on some clipping planes

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(cherry picked from commit 61d75276ea924e0fd22de0a2a927bce1d554de99)
This commit is contained in:
nds
2020-05-26 10:39:58 +03:00
parent 0fcf0a687b
commit b96cd2e422
1 changed files with 35 additions and 0 deletions
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35
src/OpenGl/OpenGl_CappingAlgo.cxx
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@@ -177,6 +177,36 @@ namespace
theWorkspace->SetAllowFaceCulling (wasCullAllowed);
}
bool isGroupClipped (const Handle(Graphic3d_Group)& theGroup, const Handle(OpenGl_Context)& theContext)
{
const Graphic3d_BndBox4f& aBoxF = theGroup->BoundingBox();
Graphic3d_BndBox3d aBBox = Graphic3d_BndBox3d (Graphic3d_Vec3d ((Standard_Real )aBoxF.CornerMin().x(),
(Standard_Real )aBoxF.CornerMin().y(),
(Standard_Real )aBoxF.CornerMin().z()),
Graphic3d_Vec3d ((Standard_Real )aBoxF.CornerMax().x(),
(Standard_Real )aBoxF.CornerMax().y(),
(Standard_Real )aBoxF.CornerMax().z()));
Standard_Boolean isClipped = false;
for (OpenGl_ClippingIterator aPlaneIt (theContext->Clipping()); aPlaneIt.More(); aPlaneIt.Next())
{
const Handle(Graphic3d_ClipPlane)& aPlane = aPlaneIt.Value();
if (!aPlane->IsOn())
{
continue;
}
const Graphic3d_ClipState aBoxState = aPlane->ProbeBox (aBBox);
if (aBoxState == Graphic3d_ClipState_Out)
{
isClipped = true;
break;
}
}
return isClipped;
}
//! Render capping for specific structure.
static void renderCappingForStructure (StencilTestSentry& theStencilSentry,
const Handle(OpenGl_Workspace)& theWorkspace,
@@ -207,6 +237,11 @@ namespace
continue;
}
if (isGroupClipped (aGroupIter.Value(), aContext))
{
continue;
}
// clear stencil only if something has been actually drawn
theStencilSentry.Init();