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0024521: Visualization - automatic back face culling is not turned on for Solids packed into compound

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StdPrs_ToolShadedShape::IsClosed():
- return true if shape is closed Solid (NOT just free closed Shell)
- accept compound of closed Solids as well
- ignore Solids with incomplete triangulation

TKOpenGl, automatically disable back face culling when:
- clipping/capping planes are in effect
- for translucent objects

Update bug23227 test case (now back faces are clipped).

OpenGl_Workspace::AspectFace() - disable culling in case of hatched style
This commit is contained in:
kgv
2014-01-16 21:09:20 +04:00
committed by bugmaster
parent fd03ee4b3b
commit 3b1817a9e2
10 changed files with 316 additions and 143 deletions
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165
src/StdPrs/StdPrs_ShadedShape.cxx
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@@ -100,7 +100,7 @@ namespace
Standard_Real aUmin (0.0), aUmax (0.0), aVmin (0.0), aVmax (0.0), dUmax (0.0), dVmax (0.0);
// precision for compare square distances
const double aPreci = Precision::SquareConfusion();
const Standard_Real aPreci = Precision::SquareConfusion();
if (!theDrawer->ShadingAspectGlobal())
{
@@ -126,99 +126,102 @@ namespace
nbVertices += T->NbNodes();
}
}
if (nbVertices > 2 && nbTriangles > 0)
if (nbVertices < 3
|| nbTriangles <= 0)
{
Handle(Graphic3d_ArrayOfTriangles) aPArray
= new Graphic3d_ArrayOfTriangles (nbVertices, 3 * nbTriangles,
Standard_True, Standard_False, theHasTexels, Standard_True);
for (SST.Init (theShape); SST.MoreFace(); SST.NextFace())
return Standard_False;
}
Handle(Graphic3d_ArrayOfTriangles) aPArray
= new Graphic3d_ArrayOfTriangles (nbVertices, 3 * nbTriangles,
Standard_True, Standard_False, theHasTexels, Standard_True);
for (SST.Init (theShape); SST.MoreFace(); SST.NextFace())
{
const TopoDS_Face& aFace = SST.CurrentFace();
T = SST.Triangulation (aFace, aLoc);
if (T.IsNull())
{
const TopoDS_Face& aFace = SST.CurrentFace();
T = SST.Triangulation (aFace, aLoc);
if (T.IsNull())
continue;
}
const gp_Trsf& aTrsf = aLoc.Transformation();
Poly_Connect pc (T);
// Extracts vertices & normals from nodes
const TColgp_Array1OfPnt& aNodes = T->Nodes();
const TColgp_Array1OfPnt2d& aUVNodes = T->UVNodes();
TColgp_Array1OfDir aNormals (aNodes.Lower(), aNodes.Upper());
SST.Normal (aFace, pc, aNormals);
if (theHasTexels)
{
BRepTools::UVBounds (aFace, aUmin, aUmax, aVmin, aVmax);
dUmax = (aUmax - aUmin);
dVmax = (aVmax - aVmin);
}
decal = aPArray->VertexNumber();
for (Standard_Integer aNodeIter = aNodes.Lower(); aNodeIter <= aNodes.Upper(); ++aNodeIter)
{
p = aNodes (aNodeIter);
if (!aLoc.IsIdentity())
{
p.Transform (aTrsf);
aNormals (aNodeIter).Transform (aTrsf);
}
if (theHasTexels && aUVNodes.Upper() == aNodes.Upper())
{
const gp_Pnt2d aTexel = gp_Pnt2d ((-theUVOrigin.X() + (theUVRepeat.X() * (aUVNodes (aNodeIter).X() - aUmin)) / dUmax) / theUVScale.X(),
(-theUVOrigin.Y() + (theUVRepeat.Y() * (aUVNodes (aNodeIter).Y() - aVmin)) / dVmax) / theUVScale.Y());
aPArray->AddVertex (p, aNormals (aNodeIter), aTexel);
}
else
{
aPArray->AddVertex (p, aNormals (aNodeIter));
}
}
// Fill array with vertex and edge visibility info
const Poly_Array1OfTriangle& aTriangles = T->Triangles();
for (Standard_Integer aTriIter = 1; aTriIter <= T->NbTriangles(); ++aTriIter)
{
pc.Triangles (aTriIter, t[0], t[1], t[2]);
if (SST.Orientation (aFace) == TopAbs_REVERSED)
aTriangles (aTriIter).Get (n[0], n[2], n[1]);
else
aTriangles (aTriIter).Get (n[0], n[1], n[2]);
gp_Pnt P1 = aNodes (n[0]);
gp_Pnt P2 = aNodes (n[1]);
gp_Pnt P3 = aNodes (n[2]);
gp_Vec V1 (P1, P2);
if (V1.SquareMagnitude() <= aPreci)
{
continue;
}
const gp_Trsf& aTrsf = aLoc.Transformation();
Poly_Connect pc (T);
// Extracts vertices & normals from nodes
const TColgp_Array1OfPnt& aNodes = T->Nodes();
const TColgp_Array1OfPnt2d& aUVNodes = T->UVNodes();
TColgp_Array1OfDir aNormals (aNodes.Lower(), aNodes.Upper());
SST.Normal (aFace, pc, aNormals);
if (theHasTexels)
gp_Vec V2 (P2, P3);
if (V2.SquareMagnitude() <= aPreci)
{
BRepTools::UVBounds (aFace, aUmin, aUmax, aVmin, aVmax);
dUmax = (aUmax - aUmin);
dVmax = (aVmax - aVmin);
continue;
}
decal = aPArray->VertexNumber();
for (Standard_Integer aNodeIter = aNodes.Lower(); aNodeIter <= aNodes.Upper(); ++aNodeIter)
gp_Vec V3 (P3, P1);
if (V3.SquareMagnitude() <= aPreci)
{
p = aNodes (aNodeIter);
if (!aLoc.IsIdentity())
{
p.Transform (aTrsf);
aNormals (aNodeIter).Transform (aTrsf);
}
if (theHasTexels && aUVNodes.Upper() == aNodes.Upper())
{
const gp_Pnt2d aTexel = gp_Pnt2d ((-theUVOrigin.X() + (theUVRepeat.X() * (aUVNodes (aNodeIter).X() - aUmin)) / dUmax) / theUVScale.X(),
(-theUVOrigin.Y() + (theUVRepeat.Y() * (aUVNodes (aNodeIter).Y() - aVmin)) / dVmax) / theUVScale.Y());
aPArray->AddVertex (p, aNormals (aNodeIter), aTexel);
}
else
{
aPArray->AddVertex (p, aNormals (aNodeIter));
}
continue;
}
// Fill parray with vertex and edge visibillity info
const Poly_Array1OfTriangle& aTriangles = T->Triangles();
for (Standard_Integer aTriIter = 1; aTriIter <= T->NbTriangles(); ++aTriIter)
V1.Normalize();
V2.Normalize();
V1.Cross (V2);
if (V1.SquareMagnitude() > aPreci)
{
pc.Triangles (aTriIter, t[0], t[1], t[2]);
if (SST.Orientation (aFace) == TopAbs_REVERSED)
aTriangles (aTriIter).Get (n[0], n[2], n[1]);
else
aTriangles (aTriIter).Get (n[0], n[1], n[2]);
gp_Pnt P1 = aNodes (n[0]);
gp_Pnt P2 = aNodes (n[1]);
gp_Pnt P3 = aNodes (n[2]);
gp_Vec V1 (P1, P2);
if (V1.SquareMagnitude() <= aPreci)
{
continue;
}
gp_Vec V2 (P2, P3);
if (V2.SquareMagnitude() <= aPreci)
{
continue;
}
gp_Vec V3 (P3, P1);
if (V3.SquareMagnitude() <= aPreci)
{
continue;
}
V1.Normalize();
V2.Normalize();
V1.Cross (V2);
if (V1.SquareMagnitude() > aPreci)
{
aPArray->AddEdge (n[0] + decal, t[0] == 0);
aPArray->AddEdge (n[1] + decal, t[1] == 0);
aPArray->AddEdge (n[2] + decal, t[2] == 0);
}
aPArray->AddEdge (n[0] + decal, t[0] == 0);
aPArray->AddEdge (n[1] + decal, t[1] == 0);
aPArray->AddEdge (n[2] + decal, t[2] == 0);
}
}
Prs3d_Root::CurrentGroup (thePresentation)->AddPrimitiveArray (aPArray);
}
Prs3d_Root::CurrentGroup (thePresentation)->AddPrimitiveArray (aPArray);
return Standard_True;
}