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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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26
src/OpenGl/OpenGl_View_Redraw.cxx
View File

@@ -1087,25 +1087,10 @@ void OpenGl_View::renderScene (Graphic3d_Camera::Projection theProjection,
const Handle(OpenGl_Context)& aContext = myWorkspace->GetGlContext();
// Specify clipping planes in view transformation space
aContext->ChangeClipping().RemoveAll (aContext);
if (!myClipPlanes.IsEmpty())
aContext->ChangeClipping().Reset (aContext, myClipPlanes);
if (!myClipPlanes.IsNull()
&& !myClipPlanes->IsEmpty())
{
Graphic3d_SequenceOfHClipPlane aUserPlanes;
Graphic3d_SequenceOfHClipPlane::Iterator aClippingIt (myClipPlanes);
for (; aClippingIt.More(); aClippingIt.Next())
{
const Handle(Graphic3d_ClipPlane)& aClipPlane = aClippingIt.Value();
if (aClipPlane->IsOn())
{
aUserPlanes.Append (aClipPlane);
}
}
if (!aUserPlanes.IsEmpty())
{
aContext->ChangeClipping().AddWorld (aContext, aUserPlanes);
}
aContext->ShaderManager()->UpdateClippingState();
}
@@ -1193,8 +1178,9 @@ void OpenGl_View::renderScene (Graphic3d_Camera::Projection theProjection,
// Apply restored view matrix.
aContext->ApplyWorldViewMatrix();
aContext->ChangeClipping().RemoveAll (aContext);
if (!myClipPlanes.IsEmpty())
aContext->ChangeClipping().Reset (aContext, Handle(Graphic3d_SequenceOfHClipPlane)());
if (!myClipPlanes.IsNull()
&& !myClipPlanes->IsEmpty())
{
aContext->ShaderManager()->RevertClippingState();
}