implicit function for convex set of planes More...

#include <vtkPlanes.h>

Inheritance diagram for vtkPlanes:

Collaboration diagram for vtkPlanes:

Public Types
typedef vtkImplicitFunction	Superclass
Public Member Functions
virtual int	IsA (const char *type)
vtkPlanes *	NewInstance () const
void	PrintSelf (ostream &os, vtkIndent indent)
void	EvaluateGradient (double x[3], double n[3])
void	SetFrustumPlanes (double planes[24])
int	GetNumberOfPlanes ()

double	EvaluateFunction (double x[3])
double	EvaluateFunction (double x, double y, double z)

virtual void	SetPoints (vtkPoints *)
virtual vtkPoints *	GetPoints ()

void	SetNormals (vtkDataArray *normals)
virtual vtkDataArray *	GetNormals ()

void	SetBounds (double bounds[6])
void	SetBounds (double xmin, double xmax, double ymin, double ymax, double zmin, double zmax)

vtkPlane *	GetPlane (int i)
void	GetPlane (int i, vtkPlane *plane)
Static Public Member Functions
static vtkPlanes *	New ()
static int	IsTypeOf (const char *type)
static vtkPlanes *	SafeDownCast (vtkObjectBase *o)
Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const
	vtkPlanes ()
	~vtkPlanes ()
Protected Attributes
vtkPoints *	Points
vtkDataArray *	Normals
vtkPlane *	Plane

Detailed Description

implicit function for convex set of planes

vtkPlanes computes the implicit function and function gradient for a set of planes. The planes must define a convex space.

The function value is the closest first order distance of a point to the convex region defined by the planes. The function gradient is the plane normal at the function value. Note that the normals must point outside of the convex region. Thus, a negative function value means that a point is inside the convex region.

There are several methods to define the set of planes. The most general is to supply an instance of vtkPoints and an instance of vtkDataArray. (The points define a point on the plane, and the normals corresponding plane normals.) Two other specialized ways are to 1) supply six planes defining the view frustrum of a camera, and 2) provide a bounding box.

See also:: vtkCamera

Examples:: vtkPlanes (Examples)

Tests:: vtkPlanes (Tests)

Definition at line 53 of file vtkPlanes.h.

Member Typedef Documentation

typedef vtkImplicitFunction vtkPlanes::Superclass

Reimplemented from vtkImplicitFunction.

Definition at line 57 of file vtkPlanes.h.

Constructor & Destructor Documentation

vtkPlanes::vtkPlanes ( ) [protected]

vtkPlanes::~vtkPlanes ( ) [protected]

Member Function Documentation

static vtkPlanes* vtkPlanes::New ( ) [static]

Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

Reimplemented from vtkObject.

Reimplemented in vtkPlanesIntersection.

static int vtkPlanes::IsTypeOf ( const char * name ) [static]

Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkImplicitFunction.

Reimplemented in vtkPlanesIntersection.

virtual int vtkPlanes::IsA ( const char * name ) [virtual]

Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkImplicitFunction.

Reimplemented in vtkPlanesIntersection.

static vtkPlanes* vtkPlanes::SafeDownCast ( vtkObjectBase * o ) [static]

Reimplemented from vtkImplicitFunction.

Reimplemented in vtkPlanesIntersection.

virtual vtkObjectBase* vtkPlanes::NewInstanceInternal ( ) const [protected, virtual]

Reimplemented from vtkImplicitFunction.

Reimplemented in vtkPlanesIntersection.

vtkPlanes* vtkPlanes::NewInstance ( ) const

Reimplemented from vtkImplicitFunction.

Reimplemented in vtkPlanesIntersection.

void vtkPlanes::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)		`[virtual]`

Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkImplicitFunction.

Reimplemented in vtkPlanesIntersection.

double vtkPlanes::EvaluateFunction ( double x[3] ) [virtual]

Evaluate plane equations. Return smallest absolute value.

Implements vtkImplicitFunction.

double vtkPlanes::EvaluateFunction	(	double	x,
		double	y,
		double	z
	)		`[inline]`

Evaluate plane equations. Return smallest absolute value.

Reimplemented from vtkImplicitFunction.

Definition at line 63 of file vtkPlanes.h.

void vtkPlanes::EvaluateGradient	(	double	x[3],
		double	n[3]
	)		`[virtual]`

Evaluate planes gradient.

Implements vtkImplicitFunction.

virtual void vtkPlanes::SetPoints ( vtkPoints * ) [virtual]

Specify a list of points defining points through which the planes pass.

virtual vtkPoints* vtkPlanes::GetPoints ( ) [virtual]

Specify a list of points defining points through which the planes pass.

void vtkPlanes::SetNormals ( vtkDataArray * normals )

Specify a list of normal vectors for the planes. There is a one-to-one correspondence between plane points and plane normals.

virtual vtkDataArray* vtkPlanes::GetNormals ( ) [virtual]

Specify a list of normal vectors for the planes. There is a one-to-one correspondence between plane points and plane normals.

void vtkPlanes::SetFrustumPlanes ( double planes[24] )

An alternative method to specify six planes defined by the camera view frustrum. See vtkCamera::GetFrustumPlanes() documentation.

void vtkPlanes::SetBounds ( double bounds[6] )

An alternative method to specify six planes defined by a bounding box. The bounding box is a six-vector defined as (xmin,xmax,ymin,ymax,zmin,zmax). It defines six planes orthogonal to the x-y-z coordinate axes.

void vtkPlanes::SetBounds	(	double	xmin,
		double	xmax,
		double	ymin,
		double	ymax,
		double	zmin,
		double	zmax
	)

An alternative method to specify six planes defined by a bounding box. The bounding box is a six-vector defined as (xmin,xmax,ymin,ymax,zmin,zmax). It defines six planes orthogonal to the x-y-z coordinate axes.

int vtkPlanes::GetNumberOfPlanes ( )

Return the number of planes in the set of planes.

vtkPlane* vtkPlanes::GetPlane ( int i )

Create and return a pointer to a vtkPlane object at the ith position. Asking for a plane outside the allowable range returns NULL. This method always returns the same object. Use GetPlane(int i, vtkPlane *plane) instead

void vtkPlanes::GetPlane	(	int	i,
		vtkPlane *	plane
	)

Create and return a pointer to a vtkPlane object at the ith position. Asking for a plane outside the allowable range returns NULL. This method always returns the same object. Use GetPlane(int i, vtkPlane *plane) instead