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// File: DsgPrs_EqualDistancePresentation.cxx
// Created: Tue Jan 27 17:05:12 1998
// Author: Julia GERASIMOVA
// <jgv@velox.nnov.matra-dtv.fr>
#include <DsgPrs_EqualDistancePresentation.ixx>
#include <DsgPrs.hxx>
#include <Graphic3d_Group.hxx>
#include <Prs3d_LengthAspect.hxx>
#include <Prs3d_LineAspect.hxx>
#include <Graphic3d_Array1OfVertex.hxx>
#include <Prs3d_Root.hxx>
#include <gp_Dir.hxx>
#include <gce_MakeDir.hxx>
#include <gp_Vec.hxx>
#include <gp_Pln.hxx>
#include <Precision.hxx>
#include <ElCLib.hxx>
#include <gp_Circ.hxx>
#include <TCollection_ExtendedString.hxx>
#include <Prs3d_Text.hxx>
//=================================================================================
//function : Add
//=================================================================================
void DsgPrs_EqualDistancePresentation::Add( const Handle( Prs3d_Presentation )& aPresentation,
const Handle( Prs3d_Drawer )& aDrawer,
const gp_Pnt& Point1,
const gp_Pnt& Point2,
const gp_Pnt& Point3,
const gp_Pnt& Point4,
const Handle( Geom_Plane )& Plane )
{
Handle( Prs3d_LengthAspect ) LA = aDrawer->LengthAspect();
Prs3d_Root::CurrentGroup( aPresentation )->SetPrimitivesAspect( LA->LineAspect()->Aspect() );
Graphic3d_Array1OfVertex VertexArray( 1, 2 );
Quantity_Length X,Y,Z;
// Line between two middles
gp_Pnt Middle12( (Point1.XYZ() + Point2.XYZ()) * 0.5 ), Middle34( (Point3.XYZ() + Point4.XYZ()) * 0.5 );
Middle12.Coord( X, Y, Z );
VertexArray( 1 ).SetCoord( X, Y, Z );
Middle34.Coord( X, Y, Z );
VertexArray( 2 ).SetCoord( X, Y, Z );
Prs3d_Root::CurrentGroup( aPresentation )->Polyline( VertexArray );
// Add presentation of arrows (points)
gp_Dir aDir( 0, 0, 1 );
DsgPrs::ComputeSymbol(aPresentation, LA,
Middle12, Middle34,
aDir, aDir,
DsgPrs_AS_BOTHPT );
// ota -- begin --
// Two small lines in the middle of this line
gp_Pnt Middle( (Middle12.XYZ() + Middle34.XYZ()) * 0.5 ), aTextPos;
Standard_Real Dist = Middle12.Distance( Middle34 );
Standard_Real SmallDist;
gp_Dir LineDir, OrtDir;
gp_Vec LineVec, OrtVec;
if (Dist > Precision::Confusion())
{
SmallDist = Dist * 0.05; // 1/20.0 part
if (SmallDist <= Precision::Confusion())
SmallDist = Dist;
LineDir = gce_MakeDir( Middle12, Middle34 );
OrtDir = Plane->Pln().Axis().Direction() ^ LineDir;
LineVec = gp_Vec( LineDir ) * SmallDist;
OrtVec = gp_Vec( OrtDir ) * SmallDist;
aTextPos = Middle.Translated( OrtVec );
}
else
{
gp_Vec Vec1( Middle, Point1 );
if (Vec1.SquareMagnitude() > Precision::Confusion()*Precision::Confusion())
{
Standard_Real Angle = gp_Vec( Middle, Point1 ).Angle( gp_Vec( Middle, Point3 ) );
gp_Pnt MidPnt = Point1.Rotated( Plane->Pln().Axis(), Angle*0.5 );
OrtDir = gce_MakeDir( Middle, MidPnt );
LineDir = OrtDir ^ Plane->Pln().Axis().Direction();
Standard_Real Distance = Point1.Distance( Point2 );
SmallDist = Distance * 0.05; // 1/20.0
if (SmallDist <= Precision::Confusion())
SmallDist = Distance;
OrtVec = gp_Vec( OrtDir ) * SmallDist;
LineVec = gp_Vec( LineDir ) * SmallDist;
}
else
{
SmallDist = 5.0;
OrtVec = gp_Vec( Plane->Pln().XAxis().Direction() ) * SmallDist;
LineVec = gp_Vec( Plane->Pln().YAxis().Direction() ) * SmallDist;
}
aTextPos = Middle.Translated (OrtVec);
}
TCollection_ExtendedString aText("==");
//Draw the text
Prs3d_Text::Draw(aPresentation,LA->TextAspect(), aText, aTextPos);
}
//==================================================================================
//function : AddInterval
//purpose : is used for presentation of interval between two lines or two points,
// or between one line and one point.
//==================================================================================
void DsgPrs_EqualDistancePresentation::AddInterval(const Handle(Prs3d_Presentation)& aPresentation,
const Handle(Prs3d_Drawer)& aDrawer,
const gp_Pnt& aPoint1,
const gp_Pnt& aPoint2,
const gp_Dir& aDirection,
const gp_Pnt& aPosition,
const DsgPrs_ArrowSide anArrowSide,
gp_Pnt& aProj1,
gp_Pnt& aProj2)
{
const Handle(Prs3d_LengthAspect) LA = aDrawer->LengthAspect();
//set color
Prs3d_Root::CurrentGroup(aPresentation)->SetPrimitivesAspect(LA->LineAspect()->Aspect());
gp_Lin L1 (aPoint1,aDirection);
gp_Lin L2 (aPoint2,aDirection);
aProj1 = ElCLib::Value(ElCLib::Parameter(L1, aPosition),L1);
aProj2 = ElCLib::Value(ElCLib::Parameter(L2, aPosition),L2);
Graphic3d_Array1OfVertex V(1,2);
Quantity_Length X,Y,Z;
aProj1.Coord (X, Y, Z);
V(1).SetCoord(X, Y, Z);
aPoint1.Coord(X, Y, Z);
V(2).SetCoord(X, Y, Z);
//add first attached line
Prs3d_Root::CurrentGroup(aPresentation)->Polyline(V);
//add distance interval
aProj2.Coord(X, Y, Z);
V(2).SetCoord(X, Y, Z);
Prs3d_Root::CurrentGroup(aPresentation)->Polyline(V);
//add second attached line
aPoint2.Coord(X, Y, Z);
V(1).SetCoord(X, Y, Z);
Prs3d_Root::CurrentGroup(aPresentation)->Polyline(V);
//add arrows presentation
gp_Dir aDir(aProj2.XYZ() - aProj1.XYZ());
DsgPrs::ComputeSymbol(aPresentation, LA,
aProj1, aProj2,
aDir.Reversed(), aDir,
anArrowSide);
}
//========================================================================
// function : AddIntervalBetweenTwoArcs
// purpose : is used for presentation of interval between two arcs. One
// of the arcs can have a zero radius (being a point really)
//========================================================================
void
DsgPrs_EqualDistancePresentation::AddIntervalBetweenTwoArcs(const Handle(Prs3d_Presentation)& aPresentation,
const Handle(Prs3d_Drawer)& aDrawer,
const gp_Circ& aCirc1,
const gp_Circ& aCirc2,
const gp_Pnt& aPoint1,
const gp_Pnt& aPoint2,
const gp_Pnt& aPoint3,
const gp_Pnt& aPoint4,
const DsgPrs_ArrowSide anArrowSide)
{
//it seems to set color
const Handle(Prs3d_LengthAspect) LA = aDrawer->LengthAspect();
Prs3d_Root::CurrentGroup(aPresentation)->SetPrimitivesAspect(LA->LineAspect()->Aspect());
Standard_Real aPar11, aPar12, aPar21, aPar22;
if(aCirc1.Radius() > Precision::Confusion()){
aPar11 = ElCLib::Parameter (aCirc1, aPoint1);
aPar12 = ElCLib::Parameter(aCirc1, aPoint2);
}
else {
aPar11 = PI;
aPar12 = PI;
}
if (aCirc2.Radius() > Precision::Confusion()){
aPar21 = ElCLib::Parameter(aCirc2, aPoint3 );
aPar22 = ElCLib::Parameter(aCirc2, aPoint4);
}
else {
aPar21 = PI;
aPar22 = PI;
}
Graphic3d_Array1OfVertex V(1,2);
V(1).SetCoord(aPoint2.X(), aPoint2.Y(), aPoint2.Z());
V(2).SetCoord(aPoint4.X(), aPoint4.Y(), aPoint4.Z());
Prs3d_Root::CurrentGroup( aPresentation )->Polyline( V );
Standard_Integer aNodeNb;
Standard_Real aDelta, aCurPar;
if(aPar12 < aPar11 ) aPar12 +=2*PI;
if (Abs(aPar12 - aPar11) > Precision::Confusion()) {
aNodeNb = Standard_Integer(Max(Abs(aPar12 - aPar11)*50./PI + 0.5, 4.));
Graphic3d_Array1OfVertex ApproxArc1( 1, aNodeNb+1);
aDelta = (aPar12 - aPar11)/aNodeNb;
aCurPar= aPar11;
for ( int i = 1; i<= aNodeNb ; aCurPar+= aDelta, i++)
{
gp_Pnt CurPnt = ElCLib::Value( aCurPar, aCirc1);
ApproxArc1(i).SetCoord( CurPnt.X(), CurPnt.Y(), CurPnt.Z() );
}
ApproxArc1(aNodeNb+1).SetCoord( aPoint2.X(), aPoint2.Y(), aPoint2.Z() );
Prs3d_Root::CurrentGroup( aPresentation )->Polyline( ApproxArc1 );
}
if (aPar22 < aPar21) aPar22 += 2*PI;
if ( Abs(aPar22 - aPar21) > Precision::Confusion()){
aNodeNb = Standard_Integer(Max(Abs(aPar22 - aPar21)*50./PI + 0.5, 4.));
Graphic3d_Array1OfVertex ApproxArc2( 1, aNodeNb+1);
aDelta = (aPar22 - aPar21)/aNodeNb;
aCurPar= aPar21;
for ( int i=1; i<= aNodeNb; aCurPar+= aDelta, i++)
{
gp_Pnt CurPnt = ElCLib::Value( aCurPar, aCirc2);
ApproxArc2(i).SetCoord( CurPnt.X(), CurPnt.Y(), CurPnt.Z() );
}
ApproxArc2(aNodeNb+1).SetCoord( aPoint4.X(), aPoint4.Y(), aPoint4.Z() );
Prs3d_Root::CurrentGroup( aPresentation )->Polyline( ApproxArc2 );
}
//get the direction of interval
gp_Dir DirOfArrow;
if(aPoint4.Distance(aPoint2) > Precision::Confusion()){
DirOfArrow.SetXYZ(aPoint4.XYZ() - aPoint2.XYZ());
}
else {
//Let's take the radius direction
gp_Pnt aCenter = aCirc1.Location();
if(aPoint4.Distance(aCenter) < Precision::Confusion())
return;
DirOfArrow.SetXYZ(aPoint4.XYZ() - aCenter.XYZ());
}
// Add presentation of arrows
DsgPrs::ComputeSymbol( aPresentation, LA, aPoint2, aPoint4, DirOfArrow.Reversed(), DirOfArrow, anArrowSide );
}
//-- ota -- end
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