G4ArrowModel Class Reference

#include <G4ArrowModel.hh>

Inheritance diagram for G4ArrowModel:

Public Member Functions
	G4ArrowModel (G4double x1, G4double y1, G4double z1, G4double x2, G4double y2, G4double z2, G4double width, const G4Colour &colour, const G4String &description="")
virtual	~G4ArrowModel ()
virtual void	DescribeYourselfTo (G4VGraphicsScene &)
Public Member Functions inherited from G4VModel
	G4VModel (const G4Transform3D &modelTransformation=G4Transform3D(), const G4ModelingParameters *=0)
virtual	~G4VModel ()
const G4ModelingParameters *	GetModelingParameters () const
const G4String &	GetType () const
virtual G4String	GetCurrentDescription () const
virtual G4String	GetCurrentTag () const
const G4VisExtent &	GetExtent () const
const G4String &	GetGlobalDescription () const
const G4String &	GetGlobalTag () const
const G4Transform3D &	GetTransformation () const
void	SetModelingParameters (const G4ModelingParameters *)
void	SetExtent (const G4VisExtent &)
void	SetType (const G4String &)
void	SetGlobalDescription (const G4String &)
void	SetGlobalTag (const G4String &)
void	SetTransformation (const G4Transform3D &)
virtual G4bool	Validate (G4bool warn=true)

Additional Inherited Members
Protected Attributes inherited from G4VModel
G4String	fType
G4String	fGlobalTag
G4String	fGlobalDescription
G4VisExtent	fExtent
G4Transform3D	fTransform
const G4ModelingParameters *	fpMP

Detailed Description

Definition at line 48 of file G4ArrowModel.hh.

Constructor & Destructor Documentation

G4ArrowModel::G4ArrowModel	(	G4double	x1,
		G4double	y1,
		G4double	z1,
		G4double	x2,
		G4double	y2,
		G4double	z2,
		G4double	width,
		const G4Colour &	colour,
		const G4String &	description = ""
	)

Definition at line 52 of file G4ArrowModel.cc.

References G4GenericPolycone::CreatePolyhedron(), G4Tubs::CreatePolyhedron(), G4INCL::Math::max(), G4INCL::Math::min(), HepGeom::BasicVector3D< T >::phi(), G4VisAttributes::SetColour(), G4VisAttributes::SetForceSolid(), HepGeom::BasicVector3D< T >::theta(), HepPolyhedron::Transform(), python.hepunit::twopi, HepGeom::BasicVector3D< T >::unit(), and z.

{
  fType = "G4ArrowModel";
  fGlobalTag = fType;
  fGlobalDescription = fType + ": " + description;
  fExtent = G4VisExtent
    (std::min(x1,x2),
     std::max(x1,x2),
     std::min(y1,y2),
     std::max(y1,y2),
     std::min(z1,z2),
     std::max(z1,z2));

  // Make a cylinder slightly shorter than the arrow length so that it
  // doesn't stick out of the head.
  const G4double shaftLength = std::sqrt
    (std::pow(x2-x1,2)+std::pow(y2-y1,2)+std::pow(z2-z1,2));
  G4double shaftRadius = width/2.;
  // Limit the radius
  if (shaftRadius > shaftLength/100.) shaftRadius = shaftLength/100.;
  const G4double halfShaftLength = shaftLength/2.;
  const G4double halfReduction = 4.*shaftRadius;
  const G4double halfLength = halfShaftLength-halfReduction;
  G4Tubs shaft("shaft",0.,shaftRadius,halfLength,0.,twopi);
  fpShaftPolyhedron = shaft.CreatePolyhedron();
  // Move it a little so that the tail is at z = -halfShaftLength.
  fpShaftPolyhedron->Transform(G4Translate3D(0,0,-halfReduction));

  // Locate the head at +halfShaftLength.
  const G4int numRZ = 3;
  G4double r[] = {0,4,0};
  G4double z[] = {0,-6,-4};
  for (G4int i = 0; i < numRZ; i++) {
    r[i] *= 2.*shaftRadius;
    z[i] = halfShaftLength + z[i] * 2.*shaftRadius;
  }
  G4GenericPolycone head("head",0,twopi,numRZ,r,z);
  fpHeadPolyhedron = head.CreatePolyhedron();

  // Transform to position
  const G4Vector3D arrowDirection = G4Vector3D(x2-x1,y2-y1,z2-z1).unit();
  const G4double theta = arrowDirection.theta();
  const G4double phi = arrowDirection.phi();
  const G4Point3D arrowCentre(0.5*(x1+x2),0.5*(y1+y2),0.5*(z1+z2));
  const G4Transform3D tr =
    G4Translate3D(arrowCentre) * G4RotateZ3D(phi) * G4RotateY3D(theta);
  fpShaftPolyhedron->Transform(tr);
  fpHeadPolyhedron->Transform(tr);

  G4VisAttributes va;
  va.SetColour(colour);
  va.SetForceSolid(true);
  fpShaftPolyhedron->SetVisAttributes(va);
  fpHeadPolyhedron->SetVisAttributes(va);
}

G4ArrowModel::~G4ArrowModel ( )

virtual

Definition at line 45 of file G4ArrowModel.cc.

{
  delete fpHeadPolyhedron;
  delete fpShaftPolyhedron;
}

Member Function Documentation

void G4ArrowModel::DescribeYourselfTo ( G4VGraphicsScene &  sceneHandler )

virtual

Implements G4VModel.

Definition at line 111 of file G4ArrowModel.cc.

References G4VGraphicsScene::AddPrimitive(), G4VGraphicsScene::BeginPrimitives(), and G4VGraphicsScene::EndPrimitives().

Referenced by G4MagneticFieldModel::DescribeYourselfTo().

{
  sceneHandler.BeginPrimitives();
  sceneHandler.AddPrimitive(*fpShaftPolyhedron);
  sceneHandler.AddPrimitive(*fpHeadPolyhedron);
  sceneHandler.EndPrimitives();
}

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The documentation for this class was generated from the following files:

• G4ArrowModel.hh
• G4ArrowModel.cc