ClipGeometryDecorator Class Reference

#include <ClipGeometryDecorator.hpp>

Inheritance diagram for ClipGeometryDecorator:

Public Types
enum class	Remove : int { Inside , Outside }

Public Member Functions
double	density (Position bfr) const override
Position	generatePosition () const override
Geometry *	geometry () const
Remove	remove () const
double	SigmaX () const override
double	SigmaY () const override
double	SigmaZ () const override
Public Member Functions inherited from Geometry
virtual double	density (Position bfr) const =0
virtual int	dimension () const =0
virtual Position	generatePosition () const =0
virtual double	SigmaX () const =0
virtual double	SigmaY () const =0
virtual double	SigmaZ () const =0
Public Member Functions inherited from SimulationItem
template<class T >
T *	find (bool setup=true) const
template<class T >
T *	interface (int levels=-999999, bool setup=true) const
virtual string	itemName () const
void	setup ()
string	typeAndName () const
Public Member Functions inherited from Item
	Item (const Item &)=delete
virtual	~Item ()
void	addChild (Item *child)
const vector< Item * > &	children () const
virtual void	clearItemListProperty (const PropertyDef *property)
void	destroyChild (Item *child)
virtual bool	getBoolProperty (const PropertyDef *property) const
virtual vector< double >	getDoubleListProperty (const PropertyDef *property) const
virtual double	getDoubleProperty (const PropertyDef *property) const
virtual string	getEnumProperty (const PropertyDef *property) const
virtual int	getIntProperty (const PropertyDef *property) const
virtual vector< Item * >	getItemListProperty (const PropertyDef *property) const
virtual Item *	getItemProperty (const PropertyDef *property) const
virtual string	getStringProperty (const PropertyDef *property) const
int	getUtilityProperty (string name) const
virtual void	insertIntoItemListProperty (const PropertyDef *property, int index, Item *item)
Item &	operator= (const Item &)=delete
Item *	parent () const
virtual void	removeFromItemListProperty (const PropertyDef *property, int index)
virtual void	setBoolProperty (const PropertyDef *property, bool value)
virtual void	setDoubleListProperty (const PropertyDef *property, vector< double > value)
virtual void	setDoubleProperty (const PropertyDef *property, double value)
virtual void	setEnumProperty (const PropertyDef *property, string value)
virtual void	setIntProperty (const PropertyDef *property, int value)
virtual void	setItemProperty (const PropertyDef *property, Item *item)
virtual void	setStringProperty (const PropertyDef *property, string value)
void	setUtilityProperty (string name, int value)
virtual string	type () const

Protected Member Functions
	ClipGeometryDecorator ()
virtual bool	inside (Position bfr) const =0
double	norm () const
void	setupSelfAfter () override
Protected Member Functions inherited from Geometry
	Geometry ()
Random *	random () const
void	setupSelfBefore () override
Protected Member Functions inherited from SimulationItem
	SimulationItem ()
virtual bool	offersInterface (const std::type_info &interfaceTypeInfo) const
virtual void	setupSelfAfter ()
virtual void	setupSelfBefore ()
Protected Member Functions inherited from Item
	Item ()

Private Types
using	BaseType = Geometry
using	ItemType = ClipGeometryDecorator

Private Attributes
Geometry *	_geometry
double	_norm
Remove	_remove

Friends
class	ItemRegistry

Detailed Description

The abstract ClipGeometryDecorator class implements a decorator that adjusts another geometry by setting the density equal to zero inside or outside a region defined in a subclass. Each ClipGeometryDecorator subclass must implement the virtual functions dimension() and inside(). The decorator increases the density in the remaining region with a constant factor to ensure that the total mass remains equal to one. The current implementation does not properly adjust the surface densities along the coordinate axes for the mass taken away by the cavity.

This item type is displayed only if the Boolean expression "Level2" evaluates to true after replacing the names by true or false depending on their presence.

Member Enumeration Documentation

Remove

enum class ClipGeometryDecorator::Remove : int

strong

The enumeration type indicating which region to remove (Inside or Outside).

Inside : "the inner region (creating a cavity)" .

Outside : "the outer region (cropping)" .

Constructor & Destructor Documentation

ClipGeometryDecorator()

ClipGeometryDecorator::ClipGeometryDecorator ( )

inlineprotected

Default constructor for abstract Item subclass ClipGeometryDecorator : "a decorator that clips another geometry" .

Member Function Documentation

density()

double ClipGeometryDecorator::density ( Position  bfr ) const

overridevirtual

This function returns the density $\rho (\mathbf{r})$ at the position $\mathbf{r}$. It is zero in the removed region, and equal to the density of the geometry being decorated elsewhere, after an adjustment is made to account for the clipping.

Implements Geometry.

generatePosition()

Position ClipGeometryDecorator::generatePosition ( ) const

overridevirtual

This function generates a random position from the geometry, by drawing a random point from the three-dimensional probability density $p(\mathbf{r})\text{d}\mathbf{r}=\rho (\mathbf{r})\text{d}\mathbf{r}$. It repeatedly calls the density() function for the geometry being decorated until a position is returned that does not lie in the removed region.

Implements Geometry.

geometry()

Geometry * ClipGeometryDecorator::geometry ( ) const

inline

This function returns the value of the discoverable item property geometry : "the geometry to be clipped" .

inside()

virtual bool ClipGeometryDecorator::inside ( Position  bfr ) const

protectedpure virtual

This pure virtual function, to be implemented by a subclass, returns true if the specified position is inside the boundary defined by the subclass, i.e. the point is in the region that would be carved away when creating a cavity, or in the region that would be retained when cropping.

Implemented in BoxClipGeometryDecorator, CylindricalClipGeometryDecorator, and SphericalClipGeometryDecorator.

norm()

double ClipGeometryDecorator::norm ( ) const

protected

This function returns the normalization factor calculated by this class during setup.

remove()

Remove ClipGeometryDecorator::remove ( ) const

inline

This function returns the value of the discoverable Remove enumeration property remove : "the region to be removed" .

setupSelfAfter()

void ClipGeometryDecorator::setupSelfAfter ( )

overrideprotectedvirtual

This function estimates the fraction $\chi$ of the mass from the original model taken away by the clipping. It samples the density of the geometry being decorated, and counts the number of generated positions that fall in the removed region. This value is used to renormalize the decorated density distribution to unity: the factor by which the original density has to be multiplied is simply $1/(1-\chi )$.

Reimplemented from SimulationItem.

SigmaX()

double ClipGeometryDecorator::SigmaX ( ) const

overridevirtual

This function returns the X-axis surface density, i.e. the integration of the density along the entire X-axis,

$${\mathrm{\Sigma }}_X={\int }_{-\mathrm{\infty }}^{\mathrm{\infty }}\rho (x,0,0)\text{d}x.$$

It returns the corresponding value of the geometry being decorated after re-normalization.

Implements Geometry.

Reimplemented in CylindricalClipGeometryDecorator.

SigmaY()

double ClipGeometryDecorator::SigmaY ( ) const

overridevirtual

This function returns the Y-axis surface density, i.e. the integration of the density along the entire Y-axis,

$${\mathrm{\Sigma }}_Y={\int }_{-\mathrm{\infty }}^{\mathrm{\infty }}\rho (0,y,0)\text{d}y.$$

It returns the corresponding value of the geometry being decorated after re-normalization.

Implements Geometry.

Reimplemented in CylindricalClipGeometryDecorator.

SigmaZ()

double ClipGeometryDecorator::SigmaZ ( ) const

overridevirtual

This function returns the Z-axis surface density, i.e. the integration of the density along the entire Z-axis,

$${\mathrm{\Sigma }}_Z={\int }_{-\mathrm{\infty }}^{\mathrm{\infty }}\rho (0,0,z)\text{d}z.$$

It returns the corresponding value of the geometry being decorated after re-normalization.

Implements Geometry.

Reimplemented in CylindricalClipGeometryDecorator.

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

• ClipGeometryDecorator.hpp