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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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8
src/V3d/V3d_View.cxx
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@@ -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)