src/DsgPrs/DsgPrs_EqualDistancePresentation.cxx

   1 // Created on: 1998-01-27
   2 // Created by: Julia GERASIMOVA
   3 // Copyright (c) 1998-1999 Matra Datavision
   4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
   5 //
   6 // This file is part of Open CASCADE Technology software library.
   7 //
   8 // This library is free software; you can redistribute it and/or modify it under
   9 // the terms of the GNU Lesser General Public License version 2.1 as published
  10 // by the Free Software Foundation, with special exception defined in the file
  11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
  12 // distribution for complete text of the license and disclaimer of any warranty.
  13 //
  14 // Alternatively, this file may be used under the terms of Open CASCADE
  15 // commercial license or contractual agreement.
  16
  17
  18 #include <DsgPrs.hxx>
  19 #include <DsgPrs_EqualDistancePresentation.hxx>
  20 #include <ElCLib.hxx>
  21 #include <gce_MakeDir.hxx>
  22 #include <Geom_Plane.hxx>
  23 #include <gp_Circ.hxx>
  24 #include <gp_Dir.hxx>
  25 #include <gp_Pln.hxx>
  26 #include <gp_Pnt.hxx>
  27 #include <gp_Vec.hxx>
  28 #include <Graphic3d_ArrayOfPolylines.hxx>
  29 #include <Graphic3d_ArrayOfSegments.hxx>
  30 #include <Graphic3d_Group.hxx>
  31 #include <Precision.hxx>
  32 #include <Prs3d_DimensionAspect.hxx>
  33 #include <Prs3d_LineAspect.hxx>
  34 #include <Prs3d_Presentation.hxx>
  35 #include <Prs3d_Text.hxx>
  36 #include <TCollection_ExtendedString.hxx>
  37
  38 //=================================================================================
  39 //function  : Add
  40 //=================================================================================
  41 void DsgPrs_EqualDistancePresentation::Add( const Handle( Prs3d_Presentation )& aPresentation,
  42                                             const Handle( Prs3d_Drawer )& aDrawer,
  43                                             const gp_Pnt& Point1,
  44                                             const gp_Pnt& Point2,
  45                                             const gp_Pnt& Point3,
  46                                             const gp_Pnt& Point4,
  47                                             const Handle( Geom_Plane )& Plane )
  48 {
  49   Handle( Prs3d_DimensionAspect ) LA = aDrawer->DimensionAspect();
  50   aPresentation->CurrentGroup()->SetPrimitivesAspect( LA->LineAspect()->Aspect() );
  51
  52   // Line between two middles
  53   gp_Pnt Middle12( (Point1.XYZ() + Point2.XYZ()) * 0.5 ), Middle34( (Point3.XYZ() + Point4.XYZ()) * 0.5 );
  54
  55   Handle(Graphic3d_ArrayOfSegments) aPrims = new Graphic3d_ArrayOfSegments(2);
  56   aPrims->AddVertex(Middle12);
  57   aPrims->AddVertex(Middle34);
  58   aPresentation->CurrentGroup()->AddPrimitiveArray(aPrims);
  59
  60   // Add presentation of arrows (points)
  61   gp_Dir aDir( 0, 0, 1 );
  62   DsgPrs::ComputeSymbol(aPresentation, LA, Middle12, Middle34, aDir, aDir, DsgPrs_AS_BOTHPT );
  63 // ota -- begin --
  64   // Two small lines in the middle of this line
  65   gp_Pnt Middle( (Middle12.XYZ() + Middle34.XYZ()) * 0.5 ), aTextPos;
  66   Standard_Real Dist = Middle12.Distance( Middle34 );
  67   Standard_Real SmallDist;
  68   gp_Dir LineDir, OrtDir;
  69   gp_Vec LineVec, OrtVec;
  70
  71   if (Dist > Precision::Confusion())
  72   {
  73     SmallDist = Dist * 0.05; // 1/20.0 part
  74     if (SmallDist <= Precision::Confusion())
  75       SmallDist = Dist;
  76     LineDir = gce_MakeDir( Middle12, Middle34 );
  77     OrtDir  = Plane->Pln().Axis().Direction() ^ LineDir;
  78     LineVec = gp_Vec( LineDir ) * SmallDist;
  79     OrtVec  = gp_Vec( OrtDir ) * SmallDist;
  80
  81     aTextPos = Middle.Translated( OrtVec );
  82   }
  83   else
  84   {
  85     gp_Vec Vec1( Middle, Point1 );
  86
  87     if (Vec1.SquareMagnitude() > Precision::Confusion()*Precision::Confusion())
  88         {
  89           Standard_Real Angle = gp_Vec( Middle, Point1 ).Angle( gp_Vec( Middle, Point3 ) );
  90           gp_Pnt MidPnt = Point1.Rotated( Plane->Pln().Axis(), Angle*0.5 );
  91           OrtDir  = gce_MakeDir( Middle, MidPnt );
  92           LineDir = OrtDir ^ Plane->Pln().Axis().Direction();
  93
  94           Standard_Real Distance = Point1.Distance( Point2 );
  95           SmallDist = Distance * 0.05; // 1/20.0
  96           if (SmallDist <= Precision::Confusion())
  97             SmallDist = Distance;
  98
  99           OrtVec = gp_Vec( OrtDir ) * SmallDist;
 100           LineVec = gp_Vec( LineDir ) * SmallDist;
 101         }
 102     else
 103         {
 104           SmallDist = 5.0;
 105           OrtVec = gp_Vec( Plane->Pln().XAxis().Direction() ) * SmallDist;
 106           LineVec = gp_Vec( Plane->Pln().YAxis().Direction() ) * SmallDist;
 107         }
 108     aTextPos =  Middle.Translated (OrtVec);
 109   }
 110
 111   TCollection_ExtendedString aText("==");
 112
 113   //Draw the text
 114   Prs3d_Text::Draw (aPresentation->CurrentGroup(),LA->TextAspect(), aText, aTextPos);
 115 }
 116
 117
 118 //==================================================================================
 119 //function  : AddInterval
 120 //purpose   : is used for presentation of interval between two lines or two points,
 121 //            or between one line and one point.
 122 //==================================================================================
 123  void DsgPrs_EqualDistancePresentation::AddInterval(const Handle(Prs3d_Presentation)& aPresentation,
 124                                                     const Handle(Prs3d_Drawer)& aDrawer,
 125                                                     const gp_Pnt& aPoint1,
 126                                                     const gp_Pnt& aPoint2,
 127                                                     const gp_Dir& aDirection,
 128                                                     const gp_Pnt& aPosition,
 129                                                     const DsgPrs_ArrowSide anArrowSide,
 130                                                     gp_Pnt& aProj1,
 131                                                     gp_Pnt& aProj2)
 132 {
 133   const Handle(Prs3d_DimensionAspect) LA = aDrawer->DimensionAspect();
 134   aPresentation->CurrentGroup()->SetPrimitivesAspect(LA->LineAspect()->Aspect());
 135
 136   gp_Lin L1 (aPoint1,aDirection);
 137   gp_Lin L2 (aPoint2,aDirection);
 138   aProj1 = ElCLib::Value(ElCLib::Parameter(L1, aPosition),L1);
 139   aProj2 = ElCLib::Value(ElCLib::Parameter(L2, aPosition),L2);
 140
 141   Handle(Graphic3d_ArrayOfPolylines) aPrims = new Graphic3d_ArrayOfPolylines(4);
 142   aPrims->AddVertex(aPoint1);
 143   aPrims->AddVertex(aProj1);
 144   aPrims->AddVertex(aProj2);
 145   aPrims->AddVertex(aPoint2);
 146   aPresentation->CurrentGroup()->AddPrimitiveArray(aPrims);
 147
 148   //add arrows presentation
 149   gp_Dir aDir(aProj2.XYZ() - aProj1.XYZ());
 150
 151   DsgPrs::ComputeSymbol(aPresentation, LA, aProj1, aProj2, aDir.Reversed(), aDir, anArrowSide);
 152 }
 153
 154
 155 //========================================================================
 156 // function : AddIntervalBetweenTwoArcs
 157 // purpose  : is used for presentation of interval between two arcs. One
 158 //            of the arcs can have a zero radius (being a point really)
 159 //========================================================================
 160  void
 161   DsgPrs_EqualDistancePresentation::AddIntervalBetweenTwoArcs(const Handle(Prs3d_Presentation)& aPresentation,
 162                                                               const Handle(Prs3d_Drawer)& aDrawer,
 163                                                               const gp_Circ& aCirc1,
 164                                                               const gp_Circ& aCirc2,
 165                                                               const gp_Pnt& aPoint1,
 166                                                               const gp_Pnt& aPoint2,
 167                                                               const gp_Pnt& aPoint3,
 168                                                               const gp_Pnt& aPoint4,
 169                                                               const DsgPrs_ArrowSide anArrowSide)
 170 {
 171   const Handle(Prs3d_DimensionAspect) LA = aDrawer->DimensionAspect();
 172   aPresentation->CurrentGroup()->SetPrimitivesAspect(LA->LineAspect()->Aspect());
 173
 174   Standard_Real aPar11, aPar12, aPar21, aPar22;
 175   if(aCirc1.Radius() > Precision::Confusion()){
 176     aPar11 = ElCLib::Parameter (aCirc1, aPoint1);
 177     aPar12 = ElCLib::Parameter(aCirc1, aPoint2);
 178   }
 179   else {
 180     aPar11 = M_PI;
 181     aPar12 = M_PI;
 182   }
 183   if (aCirc2.Radius() > Precision::Confusion()){
 184     aPar21 = ElCLib::Parameter(aCirc2, aPoint3 );
 185     aPar22 = ElCLib::Parameter(aCirc2, aPoint4);
 186   }
 187   else {
 188     aPar21 = M_PI;
 189     aPar22 = M_PI;
 190   }
 191
 192   Handle(Graphic3d_ArrayOfPrimitives) aPrims = new Graphic3d_ArrayOfSegments(2);
 193   aPrims->AddVertex(aPoint2);
 194   aPrims->AddVertex(aPoint4);
 195   aPresentation->CurrentGroup()->AddPrimitiveArray(aPrims);
 196
 197   Standard_Integer i, aNodeNb;
 198   Standard_Real aDelta, aCurPar;
 199   if(aPar12 < aPar11 ) aPar12 += 2.*M_PI;
 200   if (Abs(aPar12 - aPar11) > Precision::Confusion())
 201   {
 202     aNodeNb = Standard_Integer(Max(Abs(aPar12 - aPar11)*50./M_PI + 0.5, 4.));
 203     aDelta = (aPar12 - aPar11)/aNodeNb;
 204     aCurPar= aPar11;
 205
 206     aPrims = new Graphic3d_ArrayOfPolylines(aNodeNb+1);
 207     for (i = 1; i<= aNodeNb; aCurPar += aDelta, i++)
 208       aPrims->AddVertex(ElCLib::Value( aCurPar, aCirc1));
 209     aPrims->AddVertex(aPoint2);
 210     aPresentation->CurrentGroup()->AddPrimitiveArray(aPrims);
 211   }
 212   if (aPar22 < aPar21) aPar22 += 2.*M_PI;
 213   if ( Abs(aPar22 - aPar21) > Precision::Confusion())
 214   {
 215     aNodeNb = Standard_Integer(Max(Abs(aPar22 - aPar21)*50./M_PI + 0.5, 4.));
 216     aDelta = (aPar22 - aPar21)/aNodeNb;
 217     aCurPar= aPar21;
 218
 219     aPrims = new Graphic3d_ArrayOfPolylines(aNodeNb+1);
 220     for (i = 1; i<= aNodeNb; aCurPar += aDelta, i++)
 221       aPrims->AddVertex(ElCLib::Value( aCurPar, aCirc2));
 222     aPrims->AddVertex(aPoint4);
 223     aPresentation->CurrentGroup()->AddPrimitiveArray(aPrims);
 224   }
 225
 226   //get the direction of interval
 227   gp_Dir DirOfArrow;
 228   if(aPoint4.Distance(aPoint2) > Precision::Confusion())
 229   {
 230     DirOfArrow.SetXYZ(aPoint4.XYZ() - aPoint2.XYZ());
 231   }
 232   else
 233   {
 234     //Let's take the radius direction
 235     gp_Pnt aCenter = aCirc1.Location();
 236     if(aPoint4.Distance(aCenter) < Precision::Confusion())
 237       return;
 238     DirOfArrow.SetXYZ(aPoint4.XYZ() - aCenter.XYZ());
 239   }
 240
 241   // Add presentation of arrows
 242   DsgPrs::ComputeSymbol( aPresentation, LA, aPoint2, aPoint4, DirOfArrow.Reversed(), DirOfArrow, anArrowSide );
 243 }
 244 //-- ota -- end