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0025063: Visualization - 2D objects are not displayed at some camera positions

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Minimum thresolds introduced to zfit operation and to camera SetDistance() method.

Test case for issue CR25063
This commit is contained in:
duv 2014-07-17 11:31:29 +04:00 committed by bugmaster
parent 0272e74033
commit 3c64852756
4 changed files with 28 additions and 5 deletions
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7
src/Graphic3d/Graphic3d_Camera.cxx
View File

@ -36,6 +36,9 @@ namespace
// atomic state counter
static volatile Standard_Integer THE_STATE_COUNTER = 0;
// minimum camera distance
static const Standard_Real MIN_DISTANCE = Pow (0.1, ShortRealDigits() - 2);
};
// =======================================================================
@ -165,7 +168,9 @@ void Graphic3d_Camera::SetDistance (const Standard_Real theDistance)
{
gp_Vec aCenter2Eye (Direction());
aCenter2Eye.Reverse();
aCenter2Eye.Scale (theDistance);
// Camera should have non-zero distance.
aCenter2Eye.Scale (Max (theDistance, MIN_DISTANCE));
SetEye (Center().Translated (aCenter2Eye));
}

4
src/OpenGl/OpenGl_BVHTreeSelector.cxx
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@ -163,6 +163,10 @@ Standard_ShortReal OpenGl_BVHTreeSelector::SignedPlanePointDistance (const OpenG
const Standard_ShortReal aNormLength = std::sqrt (theNormal.x() * theNormal.x()
+ theNormal.y() * theNormal.y()
+ theNormal.z() * theNormal.z());
if (aNormLength < FLT_EPSILON)
return 0.0f;
const Standard_ShortReal anInvNormLength = 1.0f / aNormLength;
const Standard_ShortReal aD = theNormal.w() * anInvNormLength;
const Standard_ShortReal anA = theNormal.x() * anInvNormLength;

8
src/V3d/V3d_View.cxx
View File

@ -1665,13 +1665,13 @@ void V3d_View::ZFitAll (const Standard_Real theScaleFactor)
// ShortReal precision factor used to add meaningful tolerance to
// ZNear, ZFar values in order to avoid equality after type conversion
// to ShortReal matrices type.
const Standard_Real aPrecision = 1.0 / Pow (10.0, ShortRealDigits() - 1);
const Standard_Real aPrecision = Pow (0.1, ShortRealDigits() - 2);
// Compute enlarged or shrank near and far z ranges
Standard_Real aZNear = aMidDepth - aHalfDepth * theScaleFactor;
Standard_Real aZFar = aMidDepth + aHalfDepth * theScaleFactor;
aZNear -= Abs (aZNear) * aPrecision;
aZFar += Abs (aZFar) * aPrecision;
aZNear -= aPrecision * 0.5;
aZFar += aPrecision * 0.5;
if (!myCamera->IsOrthographic())
{
@ -3329,7 +3329,7 @@ Standard_Boolean V3d_View::FitMinMax (const Handle(Graphic3d_Camera)& theCamera,
gp_Trsf aCenterTrsf;
aCenterTrsf.SetTranslation (theCamera->Center(), aNewCenter);
theCamera->Transform (aCenterTrsf);
theCamera->SetDistance (Max (aMatchDistance[5] + aMatchDistance[4], Precision::Confusion()));
theCamera->SetDistance (aMatchDistance[5] + aMatchDistance[4]);
// Bounding box collapses to a point or thin line going in depth of the screen
if (aViewSizeXv < theResolution && aViewSizeYv < theResolution)

14
tests/bugs/vis/bug25063 Normal file
View File

@ -0,0 +1,14 @@
puts "==========="
puts "OCC25063"
puts "==========="
puts ""
##########################################################################
# Visualization - 2D objects are not displayed at some camera positions
##########################################################################
vinit
vtop
vline 1 -90 -90 130 90 90 130
vfit
set only_screen 1