G4SolidExtentList Class Reference

#include <G4SolidExtentList.hh>

Collaboration diagram for G4SolidExtentList:

Public Member Functions
	G4SolidExtentList ()
	G4SolidExtentList (const EAxis targetAxis, const G4VoxelLimits &voxelLimits)
	~G4SolidExtentList ()
void	AddSurface (const G4ClippablePolygon &surface)
G4bool	GetExtent (G4double &min, G4double &max) const

Protected Attributes
EAxis	axis
G4bool	limited
G4double	minLimit
G4double	maxLimit
G4ClippablePolygon	minSurface
G4ClippablePolygon	maxSurface
G4ClippablePolygon	minAbove
G4ClippablePolygon	maxBelow

Detailed Description

Definition at line 54 of file G4SolidExtentList.hh.

Constructor & Destructor Documentation

G4SolidExtentList::G4SolidExtentList

(

)

Definition at line 48 of file G4SolidExtentList.cc.

{
  axis = kZAxis;
  limited = false;
  minLimit = -INT_MAX/2;
  maxLimit =  INT_MAX/2;
}

G4SolidExtentList::G4SolidExtentList	(	const EAxis	targetAxis,
		const G4VoxelLimits &	voxelLimits
	)

Definition at line 60 of file G4SolidExtentList.cc.

{
  axis = targetAxis;
  
  limited = voxelLimits.IsLimited( axis );
  if (limited)
  {
    minLimit = voxelLimits.GetMinExtent( axis );
    maxLimit = voxelLimits.GetMaxExtent( axis );
  }
  else
  {
    minLimit = -INT_MAX/2;
    maxLimit =  INT_MAX/2;
  }
}

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G4SolidExtentList::~G4SolidExtentList

(

)

Definition at line 82 of file G4SolidExtentList.cc.

{
}

Member Function Documentation

void G4SolidExtentList::AddSurface

(

const G4ClippablePolygon &

surface

)

Definition at line 91 of file G4SolidExtentList.cc.

{
  //
  // Keep track of four surfaces
  //
  G4double min, max;
  
  surface.GetExtent( axis, min, max );
  
  if (min > maxLimit)
  {
    //
    // Nearest surface beyond maximum limit
    //
    if (surface.InFrontOf(minAbove,axis)) minAbove = surface;
  }
  else if (max < minLimit)
  {
    //
    // Nearest surface below minimum limit
    //
    if (surface.BehindOf(maxBelow,axis)) maxBelow = surface;
  }
  else
  {
    //
    // Max and min surfaces inside
    //
    if (surface.BehindOf(maxSurface,axis)) maxSurface = surface;
    if (surface.InFrontOf(minSurface,axis)) minSurface = surface;
  }
}

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G4bool G4SolidExtentList::GetExtent	(	G4double &	min,
		G4double &	max
	)		const

Definition at line 131 of file G4SolidExtentList.cc.

{
  G4double kCarTolerance = G4GeometryTolerance::GetInstance()
                           ->GetSurfaceTolerance();
  //
  // Did we have any surfaces within the limits?
  //
  if (minSurface.Empty())
  {
    //
    // Nothing! Do we have anything above?
    //
    if (minAbove.Empty()) return false;
    
    //
    // Yup. Is it facing inwards?
    //
    if (minAbove.GetNormal().operator()(axis) < 0) return false;
    
    //
    // No. We must be entirely within the solid
    //
    max = maxLimit + kCarTolerance;
    min = minLimit - kCarTolerance;
    return true;
  }
  
  //
  // Check max surface
  //
  if (maxSurface.GetNormal().operator()(axis) < 0)
  {
    //
    // Inward facing: max limit must be embedded within solid
    //
    max = maxLimit + kCarTolerance;
  }
  else
  {
    G4double sMin, sMax;
    maxSurface.GetExtent( axis, sMin, sMax );
    max = ( (sMax > maxLimit) ? maxLimit : sMax ) + kCarTolerance;
  }
  
  //
  // Check min surface
  //
  if (minSurface.GetNormal().operator()(axis) > 0)
  {
    //
    // Inward facing: max limit must be embedded within solid
    //
    min = minLimit - kCarTolerance;
  }
  else
  {
    G4double sMin, sMax;
    minSurface.GetExtent( axis, sMin, sMax );
    min = ( (sMin < minLimit) ? minLimit : sMin ) - kCarTolerance;
  }
  
  return true;
}

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Member Data Documentation

EAxis G4SolidExtentList::axis

protected

Definition at line 70 of file G4SolidExtentList.hh.

G4bool G4SolidExtentList::limited

protected

Definition at line 71 of file G4SolidExtentList.hh.

G4ClippablePolygon G4SolidExtentList::maxBelow

protected

Definition at line 75 of file G4SolidExtentList.hh.

G4double G4SolidExtentList::maxLimit

protected

Definition at line 73 of file G4SolidExtentList.hh.

G4ClippablePolygon G4SolidExtentList::maxSurface

protected

Definition at line 75 of file G4SolidExtentList.hh.

G4ClippablePolygon G4SolidExtentList::minAbove

protected

Definition at line 75 of file G4SolidExtentList.hh.

G4double G4SolidExtentList::minLimit

protected

Definition at line 72 of file G4SolidExtentList.hh.

G4ClippablePolygon G4SolidExtentList::minSurface

protected

Definition at line 75 of file G4SolidExtentList.hh.

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

• geant4.10.03.p01/source/geometry/solids/specific/include/G4SolidExtentList.hh
• geant4.10.03.p01/source/geometry/solids/specific/src/G4SolidExtentList.cc