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0027816: Visualization - provide an API for overriding clipping planes list

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Graphic3d_SequenceOfHClipPlane now inherits Standard_Transient.
PrsMgr_PresentableObject, Graphic3d_Structure, Graphic3d_CStructure,
V3d_View, OpenGl_View now manages the plane list by Handle.
The getters ::GetClipPlanes() has been removed,
setters taking non-handle ::SetClipPlanes() has been marked deprecated.

OpenGl_Structure::Render() and SelectMgr_ViewerSelector::checkOverlap()
now disable global (view) clipping planes for objects
with flags Graphic3d_TMF_TriedronPers and Graphic3d_TMF_2d
or with new flag Graphic3d_SequenceOfHClipPlane::ToOverrideGlobal().

OpenGl_Clipping now implements interface for managing clipping planes
without copying the sequences.
The filtering of duplicates is no more performed by OpenGl_Clipping
- application is responsible to not do this.
OpenGl_Clipping tries avoiding unnecessary allocations for managing
list of active planes.

MFC sample has been updated to use V3d_View::ClipPlanes() method.
This commit is contained in:
kgv
2016-09-14 13:44:47 +03:00
committed by bugmaster
parent ef444297f5
commit 3202bf1e9e
27 changed files with 691 additions and 606 deletions
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53
src/OpenGl/OpenGl_CappingAlgo.cxx
View File

@@ -64,11 +64,11 @@ namespace
//! Render capping for specific structure.
static void renderCappingForStructure (const Handle(OpenGl_Workspace)& theWorkspace,
const OpenGl_Structure& theStructure,
const OpenGl_ClippingIterator& thePlaneIter,
const Handle(OpenGl_CappingPlaneResource)& thePlane)
{
const Handle(OpenGl_Context)& aContext = theWorkspace->GetGlContext();
const Graphic3d_SequenceOfHClipPlane& aContextPlanes = aContext->Clipping().Planes();
const Handle(Graphic3d_ClipPlane)& aRenderPlane = thePlane->Plane();
const Handle(OpenGl_Context)& aContext = theWorkspace->GetGlContext();
const Handle(Graphic3d_ClipPlane)& aRenderPlane = thePlane->Plane();
for (OpenGl_Structure::GroupIterator aGroupIter (theStructure.Groups()); aGroupIter.More(); aGroupIter.Next())
{
if (!aGroupIter.Value()->IsClosed())
@@ -77,11 +77,7 @@ namespace
}
// enable only the rendering plane to generate stencil mask
for (Graphic3d_SequenceOfHClipPlane::Iterator aPlaneIt (aContextPlanes); aPlaneIt.More(); aPlaneIt.Next())
{
const Standard_Boolean isOn = (aPlaneIt.Value() == aRenderPlane);
aContext->ChangeClipping().SetEnabled (aContext, aPlaneIt.Value(), isOn);
}
aContext->ChangeClipping().DisableAllExcept (aContext, thePlaneIter);
aContext->ShaderManager()->UpdateClippingState();
glClear (GL_STENCIL_BUFFER_BIT);
@@ -118,11 +114,7 @@ namespace
theWorkspace->ApplyAspectFace();
// enable all clip plane except the rendered one
for (Graphic3d_SequenceOfHClipPlane::Iterator aPlaneIt (aContextPlanes); aPlaneIt.More(); aPlaneIt.Next())
{
const Standard_Boolean isOn = (aPlaneIt.Value() != aRenderPlane);
aContext->ChangeClipping().SetEnabled (aContext, aPlaneIt.Value(), isOn);
}
aContext->ChangeClipping().EnableAllExcept (aContext, thePlaneIter);
aContext->ShaderManager()->UpdateClippingState();
// render capping plane using the generated stencil mask
@@ -136,13 +128,15 @@ namespace
? aGroupIter.Value()->AspectFace()
: NULL);
// turn on the current plane to restore initial state
aContext->ChangeClipping().SetEnabled (aContext, thePlaneIter, Standard_True);
aContext->ShaderManager()->RevertClippingState();
aContext->ShaderManager()->RevertClippingState();
}
if (theStructure.InstancedStructure() != NULL)
{
renderCappingForStructure (theWorkspace, *theStructure.InstancedStructure(), thePlane);
renderCappingForStructure (theWorkspace, *theStructure.InstancedStructure(), thePlaneIter, thePlane);
}
}
}
@@ -155,23 +149,9 @@ void OpenGl_CappingAlgo::RenderCapping (const Handle(OpenGl_Workspace)& theWorks
const OpenGl_Structure& theStructure)
{
const Handle(OpenGl_Context)& aContext = theWorkspace->GetGlContext();
// check whether algorithm need to be performed
Standard_Boolean isCapping = Standard_False;
const Graphic3d_SequenceOfHClipPlane& aContextPlanes = aContext->Clipping().Planes();
for (Graphic3d_SequenceOfHClipPlane::Iterator aCappingIt (aContextPlanes); aCappingIt.More(); aCappingIt.Next())
{
const Handle(Graphic3d_ClipPlane)& aPlane = aCappingIt.Value();
if (aPlane->IsCapping())
{
isCapping = Standard_True;
break;
}
}
// do not perform algorithm is there is nothing to render
if (!isCapping)
if (!aContext->Clipping().IsCappingOn())
{
// do not perform algorithm if there is nothing to render
return;
}
@@ -192,11 +172,12 @@ void OpenGl_CappingAlgo::RenderCapping (const Handle(OpenGl_Workspace)& theWorks
glDepthFunc (GL_LESS);
// generate capping for every clip plane
for (Graphic3d_SequenceOfHClipPlane::Iterator aCappingIt (aContextPlanes); aCappingIt.More(); aCappingIt.Next())
for (OpenGl_ClippingIterator aCappingIt (aContext->Clipping()); aCappingIt.More(); aCappingIt.Next())
{
// get plane being rendered
const Handle(Graphic3d_ClipPlane)& aRenderPlane = aCappingIt.Value();
if (!aRenderPlane->IsCapping())
if (!aRenderPlane->IsCapping()
|| aCappingIt.IsDisabled())
{
continue;
}
@@ -211,7 +192,7 @@ void OpenGl_CappingAlgo::RenderCapping (const Handle(OpenGl_Workspace)& theWorks
aContext->ShareResource (aResId, aPlaneRes);
}
renderCappingForStructure (theWorkspace, theStructure, aPlaneRes);
renderCappingForStructure (theWorkspace, theStructure, aCappingIt, aPlaneRes);
// set delayed resource release
aPlaneRes.Nullify();
@@ -224,12 +205,6 @@ void OpenGl_CappingAlgo::RenderCapping (const Handle(OpenGl_Workspace)& theWorks
glStencilFunc (GL_ALWAYS, 0, 0xFF);
glDisable (GL_STENCIL_TEST);
// enable clipping
for (Graphic3d_SequenceOfHClipPlane::Iterator aCappingIt (aContextPlanes); aCappingIt.More(); aCappingIt.Next())
{
aContext->ChangeClipping().SetEnabled (aContext, aCappingIt.Value(), Standard_True);
}
// restore rendering aspects
theWorkspace->SetAspectFace (aFaceAsp);
theWorkspace->SetRenderFilter (aRenderFilter);