TGLPlane Class Reference

3D plane class - of format Ax + By + Cz + D = 0

This is part of collection of simple utility classes for GL only in TGLUtil.h/cxx. These provide const and non-const accessors Arr() & CArr() to a GL compatible internal field - so can be used directly with OpenGL C API calls - which TVector3 etc cannot (easily). They are not intended to be fully featured just provide minimum required.

Definition at line 524 of file TGLUtil.h.

Public Member Functions
	TGLPlane ()
	Construct a default plane of x + y + z = 0.
	TGLPlane (const TGLPlane &other)
	Construct plane from 'other'.
	TGLPlane (const TGLVector3 &norm, const TGLVertex3 &point)
	Construct plane with supplied normal vector, passing through point with optional normalisation.
	TGLPlane (const TGLVertex3 &p1, const TGLVertex3 &p2, const TGLVertex3 &p3)
	Construct plane passing through 3 supplied points with optional normalisation.
	TGLPlane (Double_t a, Double_t b, Double_t c, Double_t d)
	Construct plane with equation a.x + b.y + c.z + d = 0 with optional normalisation.
	TGLPlane (Double_t eq[4])
	Construct plane with equation eq[0].x + eq[1].y + eq[2].z + eq[3] = 0 with optional normalisation.
	~TGLPlane ()=default
Double_t	A () const
Double_t *	Arr ()
Double_t	B () const
Double_t	C () const
const Double_t *	CArr () const
	ClassDefNV (TGLPlane, 0)
Double_t	D () const
Double_t	DistanceTo (const TGLVertex3 &vertex) const
	Distance from plane to vertex.
void	Dump () const
	Output plane equation to std::out.
TGLVertex3	NearestOn (const TGLVertex3 &point) const
	Return nearest point on plane.
void	Negate ()
	Negate the plane.
TGLVector3	Norm () const
TGLPlane &	operator= (const TGLPlane &src)
	Assignment operator.
void	Set (const TGLPlane &other)
	Assign from other.
void	Set (const TGLVector3 &norm, const TGLVertex3 &point)
	Set plane from a normal vector and in-plane point pair.
void	Set (const TGLVertex3 &p1, const TGLVertex3 &p2, const TGLVertex3 &p3)
	Set plane by three points.
void	Set (Double_t a, Double_t b, Double_t c, Double_t d)
	Set by values.
void	Set (Double_t eq[4])
	Set by array values.

Private Member Functions
void	Normalise ()
	Normalise the plane.

Private Attributes
Double_t	fVals [4]

#include <TGLUtil.h>

Constructor & Destructor Documentation

TGLPlane() [1/6]

TGLPlane::TGLPlane

(

)

Construct a default plane of x + y + z = 0.

Definition at line 336 of file TGLUtil.cxx.

TGLPlane() [2/6]

TGLPlane::TGLPlane

(

const TGLPlane &

other

)

Construct plane from 'other'.

Definition at line 344 of file TGLUtil.cxx.

TGLPlane() [3/6]

TGLPlane::TGLPlane	(	Double_t	a,
		Double_t	b,
		Double_t	c,
		Double_t	d
	)

Construct plane with equation a.x + b.y + c.z + d = 0 with optional normalisation.

Definition at line 353 of file TGLUtil.cxx.

TGLPlane() [4/6]

TGLPlane::TGLPlane

(

Double_t

eq[4]

)

Construct plane with equation eq[0].x + eq[1].y + eq[2].z + eq[3] = 0 with optional normalisation.

Definition at line 362 of file TGLUtil.cxx.

TGLPlane() [5/6]

TGLPlane::TGLPlane	(	const TGLVector3 &	norm,
		const TGLVertex3 &	point
	)

Construct plane with supplied normal vector, passing through point with optional normalisation.

Definition at line 381 of file TGLUtil.cxx.

TGLPlane() [6/6]

TGLPlane::TGLPlane	(	const TGLVertex3 &	p1,
		const TGLVertex3 &	p2,
		const TGLVertex3 &	p3
	)

Construct plane passing through 3 supplied points with optional normalisation.

Definition at line 371 of file TGLUtil.cxx.

~TGLPlane()

TGLPlane::~TGLPlane ( )

default

Member Function Documentation

A()

Double_t TGLPlane::A ( ) const

inline

Definition at line 553 of file TGLUtil.h.

Arr()

Double_t * TGLPlane::Arr ( )

inline

Definition at line 564 of file TGLUtil.h.

B()

Double_t TGLPlane::B ( ) const

inline

Definition at line 554 of file TGLUtil.h.

C()

Double_t TGLPlane::C ( ) const

inline

Definition at line 555 of file TGLUtil.h.

CArr()

const Double_t * TGLPlane::CArr ( ) const

inline

Definition at line 563 of file TGLUtil.h.

ClassDefNV()

TGLPlane::ClassDefNV	(	TGLPlane	,
		0
	)

D()

Double_t TGLPlane::D ( ) const

inline

Definition at line 556 of file TGLUtil.h.

DistanceTo()

Double_t TGLPlane::DistanceTo

(

const TGLVertex3 &

vertex

)

const

Distance from plane to vertex.

Definition at line 492 of file TGLUtil.cxx.

Dump()

void TGLPlane::Dump

(

)

const

Output plane equation to std::out.

Definition at line 416 of file TGLUtil.cxx.

NearestOn()

TGLVertex3 TGLPlane::NearestOn

(

const TGLVertex3 &

point

)

const

Return nearest point on plane.

Definition at line 500 of file TGLUtil.cxx.

Negate()

void TGLPlane::Negate

(

)

Negate the plane.

Definition at line 481 of file TGLUtil.cxx.

Norm()

TGLVector3 TGLPlane::Norm ( ) const

inline

Definition at line 558 of file TGLUtil.h.

Normalise()

void TGLPlane::Normalise ( )

private

Normalise the plane.

Definition at line 398 of file TGLUtil.cxx.

operator=()

TGLPlane & TGLPlane::operator=

(

const TGLPlane &

src

)

Assignment operator.

Definition at line 389 of file TGLUtil.cxx.

Set() [1/5]

void TGLPlane::Set

(

const TGLPlane &

other

)

Assign from other.

Definition at line 425 of file TGLUtil.cxx.

Set() [2/5]

void TGLPlane::Set	(	const TGLVector3 &	norm,
		const TGLVertex3 &	point
	)

Set plane from a normal vector and in-plane point pair.

Definition at line 460 of file TGLUtil.cxx.

Set() [3/5]

void TGLPlane::Set	(	const TGLVertex3 &	p1,
		const TGLVertex3 &	p2,
		const TGLVertex3 &	p3
	)

Set plane by three points.

Definition at line 472 of file TGLUtil.cxx.

Set() [4/5]

void TGLPlane::Set	(	Double_t	a,
		Double_t	b,
		Double_t	c,
		Double_t	d
	)

Set by values.

Definition at line 436 of file TGLUtil.cxx.

Set() [5/5]

void TGLPlane::Set

(

Double_t

eq[4]

)

Set by array values.

Definition at line 448 of file TGLUtil.cxx.

Member Data Documentation

fVals

Double_t TGLPlane::fVals[4]

private

Definition at line 528 of file TGLUtil.h.

Libraries for TGLPlane:

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

• graf3d/gl/inc/TGLUtil.h
• graf3d/gl/src/TGLUtil.cxx