#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="", G4int lineSegmentsPerCircle=6, const G4Transform3D &transform=G4Transform3D())

virtual	~G4ArrowModel ()

void	DescribeYourselfTo (G4VGraphicsScene &) override

Public Member Functions inherited from G4VModel
	G4VModel (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

void	SetModelingParameters (const G4ModelingParameters *)

void	SetExtent (const G4VisExtent &)

void	SetType (const G4String &)

void	SetGlobalDescription (const G4String &)

void	SetGlobalTag (const G4String &)

virtual G4bool	Validate (G4bool warn=true)

Additional Inherited Members
Protected Attributes inherited from G4VModel
G4String	fType

G4String	fGlobalTag

G4String	fGlobalDescription

G4VisExtent	fExtent

const G4ModelingParameters *	fpMP

Detailed Description

Definition at line 47 of file G4ArrowModel.hh.

Constructor & Destructor Documentation

◆ G4ArrowModel()

G4ArrowModel::G4ArrowModel	(	G4double	x1,
		G4double	y1,
		G4double	z1,
		G4double	x2,
		G4double	y2,
		G4double	z2,
		G4double	width,
		const G4Colour &	colour,
		const G4String &	description = "",
		G4int	lineSegmentsPerCircle = 6,
		const G4Transform3D &	transform = G4Transform3D() )

Definition at line 53 of file G4ArrowModel.cc.

: fpShaftPolyhedron(nullptr)
, fpHeadPolyhedron(nullptr)
, fTransform(transform)
{
  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));
 
  // Force number of line segments per circle (aka number of rotation steps)
  G4int tempN = G4Polyhedron::GetNumberOfRotationSteps();
  G4Polyhedron::SetNumberOfRotationSteps(lineSegmentsPerCircle);
 
  // Make a cylinder slightly shorter than the arrow length so that it
  // doesn't stick out of the head.
  const G4double tolerance = G4GeometryTolerance::GetInstance()->GetRadialTolerance();
  
  G4double totalLength = std::hypot(x2-x1, y2-y1, z2-z1);
  if (totalLength < tolerance)
    {totalLength = tolerance;}
  
  G4double shaftRadius = width/6.;
  if (shaftRadius < tolerance)
    {shaftRadius = tolerance;}
 
  // case 1 - arrow length >> width -> arrow head is width and 1.5x width tall
  // case 2 - arrow length <  width -> arrow head is made to be 0.5x length
  G4double arrowLength = std::min(1.5*width, 0.5*totalLength);
 
  G4double shaftLength = totalLength - arrowLength;
  if (shaftLength < 2*tolerance)
    {shaftLength = 2*tolerance;}
 
  const G4Tubs shaft("shaft",0.,shaftRadius,0.5*shaftLength,0.,twopi);
  fpShaftPolyhedron = shaft.CreatePolyhedron();
  // translate the polyhedron down w.r.t. the centre of the whole arrow
  if (fpShaftPolyhedron)
    {fpShaftPolyhedron->Transform(G4Translate3D(0,0,-0.5*arrowLength));}
 
  // Locate the head at +halfShaftLength.
  const G4double zHi  = 0.5*totalLength;
  const G4double zLow = zHi - arrowLength;
  const G4double rExt = 0.5*width;
  const G4double xExt = std::sqrt(3.)*rExt/2.;
  const G4Tet head("head",
                   G4ThreeVector(0.,0.,zHi),
                   G4ThreeVector(0.,rExt,zLow),
                   G4ThreeVector(xExt,-rExt/2.,zLow),
                   G4ThreeVector(-xExt,-rExt/2.,zLow));
  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);
  if (fpShaftPolyhedron) fpShaftPolyhedron->Transform(tr);
  if (fpHeadPolyhedron) fpHeadPolyhedron->Transform(tr);
 
  G4VisAttributes va;
  va.SetColour(colour);
  va.SetForceSolid(true);
  if (fpShaftPolyhedron) fpShaftPolyhedron->SetVisAttributes(va);
  if (fpHeadPolyhedron) fpHeadPolyhedron->SetVisAttributes(va);
 
  // Restore number of line segments per circle
  G4Polyhedron::SetNumberOfRotationSteps(tempN);
}

◆ ~G4ArrowModel()

G4ArrowModel::~G4ArrowModel ( )

virtual

Definition at line 47 of file G4ArrowModel.cc.

{
  delete fpHeadPolyhedron;
  delete fpShaftPolyhedron;
}

Member Function Documentation

◆ DescribeYourselfTo()

void G4ArrowModel::DescribeYourselfTo ( G4VGraphicsScene & sceneHandler )

overridevirtual

Implements G4VModel.

Definition at line 137 of file G4ArrowModel.cc.

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

Referenced by G4VFieldModel::DescribeYourselfTo().

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