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class TGLPlane


TGLPlane

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.

Function Members (Methods)

public:

	TGLPlane()
	TGLPlane(const TGLPlane& other)
	TGLPlane(Double_t* eq)
	TGLPlane(const TGLVector3& norm, const TGLVertex3& point)
	TGLPlane(const TGLVertex3& p1, const TGLVertex3& p2, const TGLVertex3& p3)
	TGLPlane(Double_t a, Double_t b, Double_t c, Double_t d)
virtual	~TGLPlane()
Double_t	A() const
Double_t*	Arr()
Double_t	B() const
Double_t	C() const
const Double_t*	CArr() const
static TClass*	Class()
Double_t	D() const
Double_t	DistanceTo(const TGLVertex3& vertex) const
void	Dump() const
virtual TClass*	IsA() const
TGLVertex3	NearestOn(const TGLVertex3& point) const
void	Negate()
TGLVector3	Norm() const
TGLPlane&	operator=(const TGLPlane&)
void	Set(const TGLPlane& other)
void	Set(Double_t* eq)
void	Set(const TGLVector3& norm, const TGLVertex3& point)
void	Set(const TGLVertex3& p1, const TGLVertex3& p2, const TGLVertex3& p3)
void	Set(Double_t a, Double_t b, Double_t c, Double_t d)
virtual void	ShowMembers(TMemberInspector&)
virtual void	Streamer(TBuffer&)
void	StreamerNVirtual(TBuffer& ClassDef_StreamerNVirtual_b)

private:

void	Normalise()

Data Members

private:

Double_t	fVals[4]

Class Charts

Inheritance Inherited Members Includes Libraries

Function documentation

TGLPlane()

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

TGLPlane(const TGLPlane& other)

 Construct plane from 'other'

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)

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

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

 Construct plane passing through 3 supplied points
 with optional normalisation

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

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

~TGLPlane()

 Destroy plane object

void Normalise()

 Normalise the plane.

void Dump() const

 Output plane equation to std::out

void Set(const TGLPlane& other)

 Assign from other.

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

 Set by values.

void Set(Double_t* eq)

 Set by array values.

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 Negate()

 Negate the plane.

Double_t DistanceTo(const TGLVertex3& vertex) const

 Distance from plane to vertex.

TGLVertex3 NearestOn(const TGLVertex3& point) const

 Return nearest point on plane.

const Double_t * CArr() const

{ return fVals; }

Double_t * Arr()

{ return fVals; }

Double_t A() const

 Accessors

{ return fVals[0]; }

Double_t B() const

{ return fVals[1]; }

Double_t C() const

{ return fVals[2]; }

TGLVector3 Norm() const

{ return TGLVector3( fVals[0], fVals[1], fVals[2]); }

TGLColor& operator=(const TGLPlane& )