From: kgv <kgv@opencascade.com>
Date: Fri, 9 Oct 2020 11:19:46 +0000 (+0300)
Subject: 0031833: Visualization - dynamic highlighting does not appear within ImmediateRedraw()
X-Git-Tag: V7_5_0~36
X-Git-Url: http://git.dev.opencascade.org/gitweb/?a=commitdiff_plain;h=cdfcd39b693d719526aca4932648ba0a3220303e;p=occt.git

0031833: Visualization - dynamic highlighting does not appear within ImmediateRedraw()

AIS_ViewController::contextLazyMoveTo() now undoes Z Range changes after MoveTo().
---

diff --git a/src/AIS/AIS_ViewController.cxx b/src/AIS/AIS_ViewController.cxx
index 497216a768..4823afed83 100644
--- a/src/AIS/AIS_ViewController.cxx
+++ b/src/AIS/AIS_ViewController.cxx
@@ -2697,8 +2697,14 @@ void AIS_ViewController::contextLazyMoveTo (const Handle(AIS_InteractiveContext)
   myPrevMoveTo = thePnt;
 
   Handle(SelectMgr_EntityOwner) aLastPicked = theCtx->DetectedOwner();
+
+  // Picking relies on the camera frustum (including Z-range) - so make temporary AutoZFit()
+  // and then restore previous frustum to avoid immediate layer rendering issues if View has not been invalidated.
+  const Standard_Real aZNear = theView->Camera()->ZNear(), aZFar = theView->Camera()->ZFar();
   theView->AutoZFit();
   theCtx->MoveTo (thePnt.x(), thePnt.y(), theView, false);
+  theView->Camera()->SetZRange (aZNear, aZFar);
+
   Handle(SelectMgr_EntityOwner) aNewPicked = theCtx->DetectedOwner();
 
   if (theView->Viewer()->Grid()->IsActive()