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0002618: Visualization - choose better center of gravity for camera rotation operations

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Gravity point set to camera center.
This commit is contained in:
duv
2015-03-10 15:15:07 +03:00
parent 3323aa8e5c
commit 461fb9c4be
1 changed files with 3 additions and 101 deletions
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104
src/V3d/V3d_View.cxx
View File

@@ -2167,107 +2167,9 @@ void V3d_View::Gravity (Standard_Real& theX,
Standard_Real& theY,
Standard_Real& theZ) const
{
Graphic3d_MapOfStructure aSetOfStructures;
myView->DisplayedStructures (aSetOfStructures);
Standard_Boolean hasSelection = Standard_False;
for (Graphic3d_MapIteratorOfMapOfStructure aStructIter (aSetOfStructures);
aStructIter.More(); aStructIter.Next())
{
if (aStructIter.Key()->IsHighlighted()
&& aStructIter.Key()->IsVisible())
{
hasSelection = Standard_True;
break;
}
}
Standard_Real Xmin, Ymin, Zmin, Xmax, Ymax, Zmax;
Standard_Integer aNbPoints = 0;
gp_XYZ aResult (0.0, 0.0, 0.0);
for (Graphic3d_MapIteratorOfMapOfStructure aStructIter (aSetOfStructures);
aStructIter.More(); aStructIter.Next())
{
const Handle(Graphic3d_Structure)& aStruct = aStructIter.Key();
if (!aStruct->IsVisible()
|| aStruct->IsInfinite()
|| (hasSelection && !aStruct->IsHighlighted()))
{
continue;
}
const Graphic3d_BndBox4f& aBox = aStruct->CStructure()->BoundingBox();
if (!aBox.IsValid())
{
continue;
}
// skip transformation-persistent objects
if (aStruct->TransformPersistence().Flags != Graphic3d_TMF_None)
{
continue;
}
// use camera projection to find gravity point
Xmin = (Standard_Real )aBox.CornerMin().x();
Ymin = (Standard_Real )aBox.CornerMin().y();
Zmin = (Standard_Real )aBox.CornerMin().z();
Xmax = (Standard_Real )aBox.CornerMax().x();
Ymax = (Standard_Real )aBox.CornerMax().y();
Zmax = (Standard_Real )aBox.CornerMax().z();
gp_Pnt aPnts[THE_NB_BOUND_POINTS] =
{
gp_Pnt (Xmin, Ymin, Zmin), gp_Pnt (Xmin, Ymin, Zmax),
gp_Pnt (Xmin, Ymax, Zmin), gp_Pnt (Xmin, Ymax, Zmax),
gp_Pnt (Xmax, Ymin, Zmin), gp_Pnt (Xmax, Ymin, Zmax),
gp_Pnt (Xmax, Ymax, Zmin), gp_Pnt (Xmax, Ymax, Zmax)
};
for (Standard_Integer aPntIt = 0; aPntIt < THE_NB_BOUND_POINTS; ++aPntIt)
{
const gp_Pnt& aBndPnt = aPnts[aPntIt];
const gp_Pnt aProjected = Camera()->Project (aBndPnt);
if (Abs (aProjected.X()) <= 1.0
&& Abs (aProjected.Y()) <= 1.0)
{
aResult += aBndPnt.XYZ();
++aNbPoints;
}
}
}
if (aNbPoints == 0)
{
// fallback - just use bounding box of entire scene
Bnd_Box aBox = myView->MinMaxValues (Standard_True);
if (!aBox.IsVoid())
{
aBox.Get (Xmin, Ymin, Zmin,
Xmax, Ymax, Zmax);
gp_Pnt aPnts[THE_NB_BOUND_POINTS] =
{
gp_Pnt (Xmin, Ymin, Zmin), gp_Pnt (Xmin, Ymin, Zmax),
gp_Pnt (Xmin, Ymax, Zmin), gp_Pnt (Xmin, Ymax, Zmax),
gp_Pnt (Xmax, Ymin, Zmin), gp_Pnt (Xmax, Ymin, Zmax),
gp_Pnt (Xmax, Ymax, Zmin), gp_Pnt (Xmax, Ymax, Zmax)
};
for (Standard_Integer aPntIt = 0; aPntIt < THE_NB_BOUND_POINTS; ++aPntIt)
{
const gp_Pnt& aBndPnt = aPnts[aPntIt];
aResult += aBndPnt.XYZ();
++aNbPoints;
}
}
}
if (aNbPoints > 0)
{
aResult /= aNbPoints;
}
theX = aResult.X();
theY = aResult.Y();
theZ = aResult.Z();
theX = myCamera->Center().X();
theY = myCamera->Center().Y();
theZ = myCamera->Center().Z();
}
//=======================================================================