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_Root.hxx>
  36 #include <Prs3d_Text.hxx>
  37 #include <TCollection_ExtendedString.hxx>
  38
  39 //=================================================================================
  40 //function  : Add
  41 //=================================================================================
  42 void DsgPrs_EqualDistancePresentation::Add( const Handle( Prs3d_Presentation )& aPresentation,
  43                                             const Handle( Prs3d_Drawer )& aDrawer,
  44                                             const gp_Pnt& Point1,
  45                                             const gp_Pnt& Point2,
  46                                             const gp_Pnt& Point3,
  47                                             const gp_Pnt& Point4,
  48                                             const Handle( Geom_Plane )& Plane )
  49 {
  50   Handle( Prs3d_DimensionAspect ) LA = aDrawer->DimensionAspect();
  51   Prs3d_Root::CurrentGroup( aPresentation )->SetPrimitivesAspect( LA->LineAspect()->Aspect() );
  52
  53   // Line between two middles
  54   gp_Pnt Middle12( (Point1.XYZ() + Point2.XYZ()) * 0.5 ), Middle34( (Point3.XYZ() + Point4.XYZ()) * 0.5 );
  55
  56   Handle(Graphic3d_ArrayOfSegments) aPrims = new Graphic3d_ArrayOfSegments(2);
  57   aPrims->AddVertex(Middle12);
  58   aPrims->AddVertex(Middle34);
  59   Prs3d_Root::CurrentGroup(aPresentation)->AddPrimitiveArray(aPrims);
  60
  61   // Add presentation of arrows (points)
  62   gp_Dir aDir( 0, 0, 1 );
  63   DsgPrs::ComputeSymbol(aPresentation, LA, Middle12, Middle34, aDir, aDir, DsgPrs_AS_BOTHPT );
  64 // ota -- begin --
  65   // Two small lines in the middle of this line
  66   gp_Pnt Middle( (Middle12.XYZ() + Middle34.XYZ()) * 0.5 ), aTextPos;
  67   Standard_Real Dist = Middle12.Distance( Middle34 );
  68   Standard_Real SmallDist;
  69   gp_Dir LineDir, OrtDir;
  70   gp_Vec LineVec, OrtVec;
  71
  72   if (Dist > Precision::Confusion())
  73   {
  74     SmallDist = Dist * 0.05; // 1/20.0 part
  75     if (SmallDist <= Precision::Confusion())
  76       SmallDist = Dist;
  77     LineDir = gce_MakeDir( Middle12, Middle34 );
  78     OrtDir  = Plane->Pln().Axis().Direction() ^ LineDir;
  79     LineVec = gp_Vec( LineDir ) * SmallDist;
  80     OrtVec  = gp_Vec( OrtDir ) * SmallDist;
  81
  82     aTextPos = Middle.Translated( OrtVec );
  83   }
  84   else
  85   {
  86     gp_Vec Vec1( Middle, Point1 );
  87
  88     if (Vec1.SquareMagnitude() > Precision::Confusion()*Precision::Confusion())
  89         {
  90           Standard_Real Angle = gp_Vec( Middle, Point1 ).Angle( gp_Vec( Middle, Point3 ) );
  91           gp_Pnt MidPnt = Point1.Rotated( Plane->Pln().Axis(), Angle*0.5 );
  92           OrtDir  = gce_MakeDir( Middle, MidPnt );
  93           LineDir = OrtDir ^ Plane->Pln().Axis().Direction();
  94
  95           Standard_Real Distance = Point1.Distance( Point2 );
  96           SmallDist = Distance * 0.05; // 1/20.0
  97           if (SmallDist <= Precision::Confusion())
  98             SmallDist = Distance;
  99
 100           OrtVec = gp_Vec( OrtDir ) * SmallDist;
 101           LineVec = gp_Vec( LineDir ) * SmallDist;
 102         }
 103     else
 104         {
 105           SmallDist = 5.0;
 106           OrtVec = gp_Vec( Plane->Pln().XAxis().Direction() ) * SmallDist;
 107           LineVec = gp_Vec( Plane->Pln().YAxis().Direction() ) * SmallDist;
 108         }
 109     aTextPos =  Middle.Translated (OrtVec);
 110   }
 111
 112   TCollection_ExtendedString aText("==");
 113
 114   //Draw the text
 115   Prs3d_Text::Draw (Prs3d_Root::CurrentGroup (aPresentation),LA->TextAspect(), aText, aTextPos);
 116 }
 117
 118
 119 //==================================================================================
 120 //function  : AddInterval
 121 //purpose   : is used for presentation of interval between two lines or two points,
 122 //            or between one line and one point.
 123 //==================================================================================
 124  void DsgPrs_EqualDistancePresentation::AddInterval(const Handle(Prs3d_Presentation)& aPresentation,
 125                                                     const Handle(Prs3d_Drawer)& aDrawer,
 126                                                     const gp_Pnt& aPoint1,
 127                                                     const gp_Pnt& aPoint2,
 128                                                     const gp_Dir& aDirection,
 129                                                     const gp_Pnt& aPosition,
 130                                                     const DsgPrs_ArrowSide anArrowSide,
 131                                                     gp_Pnt& aProj1,
 132                                                     gp_Pnt& aProj2)
 133 {
 134   const Handle(Prs3d_DimensionAspect) LA = aDrawer->DimensionAspect();
 135   Prs3d_Root::CurrentGroup(aPresentation)->SetPrimitivesAspect(LA->LineAspect()->Aspect());
 136
 137   gp_Lin L1 (aPoint1,aDirection);
 138   gp_Lin L2 (aPoint2,aDirection);
 139   aProj1 = ElCLib::Value(ElCLib::Parameter(L1, aPosition),L1);
 140   aProj2 = ElCLib::Value(ElCLib::Parameter(L2, aPosition),L2);
 141
 142   Handle(Graphic3d_ArrayOfPolylines) aPrims = new Graphic3d_ArrayOfPolylines(4);
 143   aPrims->AddVertex(aPoint1);
 144   aPrims->AddVertex(aProj1);
 145   aPrims->AddVertex(aProj2);
 146   aPrims->AddVertex(aPoint2);
 147   Prs3d_Root::CurrentGroup(aPresentation)->AddPrimitiveArray(aPrims);
 148
 149   //add arrows presentation
 150   gp_Dir aDir(aProj2.XYZ() - aProj1.XYZ());
 151
 152   DsgPrs::ComputeSymbol(aPresentation, LA, aProj1, aProj2, aDir.Reversed(), aDir, anArrowSide);
 153 }
 154
 155
 156 //========================================================================
 157 // function : AddIntervalBetweenTwoArcs
 158 // purpose  : is used for presentation of interval between two arcs. One
 159 //            of the arcs can have a zero radius (being a point really)
 160 //========================================================================
 161  void
 162   DsgPrs_EqualDistancePresentation::AddIntervalBetweenTwoArcs(const Handle(Prs3d_Presentation)& aPresentation,
 163                                                               const Handle(Prs3d_Drawer)& aDrawer,
 164                                                               const gp_Circ& aCirc1,
 165                                                               const gp_Circ& aCirc2,
 166                                                               const gp_Pnt& aPoint1,
 167                                                               const gp_Pnt& aPoint2,
 168                                                               const gp_Pnt& aPoint3,
 169                                                               const gp_Pnt& aPoint4,
 170                                                               const DsgPrs_ArrowSide anArrowSide)
 171 {
 172   const Handle(Prs3d_DimensionAspect) LA = aDrawer->DimensionAspect();
 173   Prs3d_Root::CurrentGroup(aPresentation)->SetPrimitivesAspect(LA->LineAspect()->Aspect());
 174
 175   Standard_Real aPar11, aPar12, aPar21, aPar22;
 176   if(aCirc1.Radius() > Precision::Confusion()){
 177     aPar11 = ElCLib::Parameter (aCirc1, aPoint1);
 178     aPar12 = ElCLib::Parameter(aCirc1, aPoint2);
 179   }
 180   else {
 181     aPar11 = M_PI;
 182     aPar12 = M_PI;
 183   }
 184   if (aCirc2.Radius() > Precision::Confusion()){
 185     aPar21 = ElCLib::Parameter(aCirc2, aPoint3 );
 186     aPar22 = ElCLib::Parameter(aCirc2, aPoint4);
 187   }
 188   else {
 189     aPar21 = M_PI;
 190     aPar22 = M_PI;
 191   }
 192
 193   Handle(Graphic3d_ArrayOfPrimitives) aPrims = new Graphic3d_ArrayOfSegments(2);
 194   aPrims->AddVertex(aPoint2);
 195   aPrims->AddVertex(aPoint4);
 196   Prs3d_Root::CurrentGroup(aPresentation)->AddPrimitiveArray(aPrims);
 197
 198   Standard_Integer i, aNodeNb;
 199   Standard_Real aDelta, aCurPar;
 200   if(aPar12 < aPar11 ) aPar12 += 2.*M_PI;
 201   if (Abs(aPar12 - aPar11) > Precision::Confusion())
 202   {
 203     aNodeNb = Standard_Integer(Max(Abs(aPar12 - aPar11)*50./M_PI + 0.5, 4.));
 204     aDelta = (aPar12 - aPar11)/aNodeNb;
 205     aCurPar= aPar11;
 206
 207     aPrims = new Graphic3d_ArrayOfPolylines(aNodeNb+1);
 208     for (i = 1; i<= aNodeNb; aCurPar += aDelta, i++)
 209       aPrims->AddVertex(ElCLib::Value( aCurPar, aCirc1));
 210     aPrims->AddVertex(aPoint2);
 211     Prs3d_Root::CurrentGroup(aPresentation)->AddPrimitiveArray(aPrims);
 212   }
 213   if (aPar22 < aPar21) aPar22 += 2.*M_PI;
 214   if ( Abs(aPar22 - aPar21) > Precision::Confusion())
 215   {
 216     aNodeNb = Standard_Integer(Max(Abs(aPar22 - aPar21)*50./M_PI + 0.5, 4.));
 217     aDelta = (aPar22 - aPar21)/aNodeNb;
 218     aCurPar= aPar21;
 219
 220     aPrims = new Graphic3d_ArrayOfPolylines(aNodeNb+1);
 221     for (i = 1; i<= aNodeNb; aCurPar += aDelta, i++)
 222       aPrims->AddVertex(ElCLib::Value( aCurPar, aCirc2));
 223     aPrims->AddVertex(aPoint4);
 224     Prs3d_Root::CurrentGroup(aPresentation)->AddPrimitiveArray(aPrims);
 225   }
 226
 227   //get the direction of interval
 228   gp_Dir DirOfArrow;
 229   if(aPoint4.Distance(aPoint2) > Precision::Confusion())
 230   {
 231     DirOfArrow.SetXYZ(aPoint4.XYZ() - aPoint2.XYZ());
 232   }
 233   else
 234   {
 235     //Let's take the radius direction
 236     gp_Pnt aCenter = aCirc1.Location();
 237     if(aPoint4.Distance(aCenter) < Precision::Confusion())
 238       return;
 239     DirOfArrow.SetXYZ(aPoint4.XYZ() - aCenter.XYZ());
 240   }
 241
 242   // Add presentation of arrows
 243   DsgPrs::ComputeSymbol( aPresentation, LA, aPoint2, aPoint4, DirOfArrow.Reversed(), DirOfArrow, anArrowSide );
 244 }
 245 //-- ota -- end