src/DsgPrs/DsgPrs_TangentPresentation.cxx

   1 // File:        DsgPrs_TangentPresentation.cxx
   2 // Created:     Tue Jan 16 14:29:33 1996
   3 // Author:      Jean-Pierre COMBE
   4 //              <jpi>
   5
   6
   7 #include <DsgPrs_TangentPresentation.ixx>
   8
   9 #include <Graphic3d_Group.hxx>
  10 #include <Graphic3d_Array1OfVertex.hxx>
  11 #include <Prs3d_Arrow.hxx>
  12 #include <Prs3d_ArrowAspect.hxx>
  13 #include <Prs3d_LineAspect.hxx>
  14 #include <Prs3d_LengthAspect.hxx>
  15 #include <Graphic3d_AspectLine3d.hxx>
  16 #include <Prs3d_PointAspect.hxx>
  17 #include <Geom_CartesianPoint.hxx>
  18 #include <StdPrs_Point.hxx>
  19 #include <gp_Vec.hxx>
  20 #include <Prs3d_Arrow.hxx>
  21
  22 void DsgPrs_TangentPresentation::Add (const Handle(Prs3d_Presentation)& aPresentation,
  23                                       const Handle(Prs3d_Drawer)& aDrawer,
  24                                       const gp_Pnt& OffsetPoint,
  25                                       const gp_Dir& aDirection,
  26                                       const Standard_Real length)
  27 {
  28   gp_Vec vec(aDirection);
  29   gp_Vec vec1 = vec.Multiplied(length);
  30   gp_Vec vec2 = vec.Multiplied(-length);
  31   gp_Pnt p1 = OffsetPoint.Translated(vec1);
  32   gp_Pnt p2 = OffsetPoint.Translated(vec2);
  33
  34   // Aspect
  35   Handle(Prs3d_LengthAspect) LA = aDrawer->LengthAspect();
  36   LA->LineAspect()->SetTypeOfLine(Aspect_TOL_SOLID);
  37   Handle(Prs3d_ArrowAspect) ARR1 = LA->Arrow1Aspect();
  38   Handle(Prs3d_ArrowAspect) ARR2 = LA->Arrow2Aspect();
  39   ARR1->SetLength(length/5);
  40   ARR2->SetLength(length/5);
  41
  42   // Array1OfVertex
  43   Prs3d_Root::CurrentGroup(aPresentation)->SetPrimitivesAspect(LA->LineAspect()->Aspect());
  44   Graphic3d_Array1OfVertex V(1,2);
  45   Quantity_Length X,Y,Z;
  46   p1.Coord(X,Y,Z);
  47   V(1).SetCoord(X,Y,Z);
  48   p2.Coord(X,Y,Z);
  49   V(2).SetCoord(X,Y,Z);
  50   Prs3d_Root::CurrentGroup(aPresentation)->Polyline(V);
  51
  52   // fleche 1 :
  53   Prs3d_Root::NewGroup(aPresentation);
  54   Prs3d_Root::CurrentGroup(aPresentation)->SetPrimitivesAspect(LA->LineAspect()->Aspect());
  55   Prs3d_Arrow::Draw(aPresentation,p1,aDirection,
  56                     LA->Arrow1Aspect()->Angle(),
  57                     LA->Arrow1Aspect()->Length());
  58
  59   // fleche 2
  60   Prs3d_Root::NewGroup(aPresentation);
  61   Prs3d_Root::CurrentGroup(aPresentation)->SetPrimitivesAspect(LA->LineAspect()->Aspect());
  62   Prs3d_Arrow::Draw(aPresentation,p2,aDirection.Reversed(),
  63                     LA->Arrow2Aspect()->Angle(),
  64                     LA->Arrow2Aspect()->Length());
  65 }
  66
  67