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Reference Guide
Public Member Functions | Private Member Functions | Private Attributes | List of all members
TGLMatrix Class Reference

16 component (4x4) transform matrix - column MAJOR as per GL.

Provides limited support for adjusting the translation, scale and rotation components.

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 600 of file TGLUtil.h.

Public Member Functions

 TGLMatrix ()
 Construct default identity matrix: More...
 
 TGLMatrix (Double_t x, Double_t y, Double_t z)
 Construct matrix with translation components x,y,z: More...
 
 TGLMatrix (const TGLVertex3 &translation)
 Construct matrix with translation components x,y,z: More...
 
 TGLMatrix (const TGLVertex3 &origin, const TGLVector3 &zAxis, const TGLVector3 &xAxis)
 Construct matrix which when applied puts local origin at 'origin' and the local Z axis in direction 'z'. More...
 
 TGLMatrix (const TGLVertex3 &origin, const TGLVector3 &zAxis)
 Construct matrix which when applied puts local origin at 'origin' and the local Z axis in direction 'z'. More...
 
 TGLMatrix (const Double_t vals[16])
 Construct matrix using the 16 Double_t 'vals' passed, ordering is maintained - i.e. More...
 
 TGLMatrix (const TGLMatrix &other)
 Construct matrix from 'other'. More...
 
virtual ~TGLMatrix ()
 Destroy matrix object. More...
 
TGLMatrixoperator= (const TGLMatrix &rhs)
 
Double_toperator[] (Int_t index)
 
Double_t operator[] (Int_t index) const
 
void MultRight (const TGLMatrix &rhs)
 Multiply with matrix rhs on right. More...
 
void MultLeft (const TGLMatrix &lhs)
 Multiply with matrix lhs on left. More...
 
TGLMatrixoperator*= (const TGLMatrix &rhs)
 
void Set (const TGLVertex3 &origin, const TGLVector3 &zAxis, const TGLVector3 &xAxis=0)
 Set matrix which when applied puts local origin at 'origin' and the local Z axis in direction 'z'. More...
 
void Set (const Double_t vals[16])
 Set matrix using the 16 Double_t 'vals' passed, ordering is maintained - i.e. More...
 
void SetIdentity ()
 Set matrix to identity. More...
 
void SetTranslation (Double_t x, Double_t y, Double_t z)
 Set matrix translation components x,y,z. More...
 
void SetTranslation (const TGLVertex3 &translation)
 Set matrix translation components x,y,z. More...
 
void Translate (const TGLVector3 &vect)
 Shift matrix translation components by 'vect' in parent frame. More...
 
void MoveLF (Int_t ai, Double_t amount)
 Translate in local frame. More...
 
void Move3LF (Double_t x, Double_t y, Double_t z)
 Translate in local frame along all base vectors simultaneously. More...
 
void Scale (const TGLVector3 &scale)
 Set matrix axis scales to 'scale'. More...
 
void Rotate (const TGLVertex3 &pivot, const TGLVector3 &axis, Double_t angle)
 Update matrix so resulting transform has been rotated about 'pivot' (in parent frame), round vector 'axis', through 'angle' (radians) Equivalent to glRotate function, but with addition of translation and compounded on top of existing. More...
 
void RotateLF (Int_t i1, Int_t i2, Double_t amount)
 Rotate in local frame. More...
 
void RotatePF (Int_t i1, Int_t i2, Double_t amount)
 Rotate in parent frame. Does optimised version of MultLeft. More...
 
void TransformVertex (TGLVertex3 &vertex) const
 Transform passed 'vertex' by this matrix - converts local frame to parent. More...
 
void Transpose3x3 ()
 Transpose the top left 3x3 matrix component along major diagonal Supported as currently incompatibility between TGeo and GL matrix layouts for this 3x3 only. More...
 
Double_t Invert ()
 Invert the matrix, returns determinant. More...
 
TGLVector3 GetTranslation () const
 Return the translation component of matrix. More...
 
TGLVector3 GetScale () const
 Get local axis scaling factors. More...
 
Bool_t IsScalingForRender () const
 Return true if matrix is to be considered a scaling matrix for rendering. More...
 
void SetBaseVec (Int_t b, Double_t x, Double_t y, Double_t z)
 
void SetBaseVec (Int_t b, const TGLVector3 &v)
 
void SetBaseVec (Int_t b, Double_t *x)
 
TGLVector3 GetBaseVec (Int_t b) const
 
void GetBaseVec (Int_t b, TGLVector3 &v) const
 
void GetBaseVec (Int_t b, Double_t *x) const
 
TGLVector3 Multiply (const TGLVector3 &v, Double_t w=1) const
 Multiply vector. More...
 
TGLVector3 Rotate (const TGLVector3 &v) const
 Rotate vector. Translation is not applied. More...
 
void MultiplyIP (TGLVector3 &v, Double_t w=1) const
 Multiply vector in-place. More...
 
void RotateIP (TGLVector3 &v) const
 Rotate vector in-place. Translation is not applied. More...
 
const Double_tCArr () const
 
Double_tArr ()
 
void Dump () const
 Output 16 matrix components to std::cout. More...
 
 ClassDef (TGLMatrix, 1)
 

Private Member Functions

Bool_t ValidIndex (UInt_t index) const
 

Private Attributes

Double_t fVals [16]
 

#include <TGLUtil.h>

Constructor & Destructor Documentation

TGLMatrix::TGLMatrix ( )

Construct default identity matrix:

1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1

Definition at line 634 of file TGLUtil.cxx.

TGLMatrix::TGLMatrix ( Double_t  x,
Double_t  y,
Double_t  z 
)

Construct matrix with translation components x,y,z:

1 0 0 x 0 1 0 y 0 0 1 z 0 0 0 1

Definition at line 647 of file TGLUtil.cxx.

TGLMatrix::TGLMatrix ( const TGLVertex3 translation)

Construct matrix with translation components x,y,z:

1 0 0 translation.X() 0 1 0 translation.Y() 0 0 1 translation.Z() 0 0 0 1

Definition at line 661 of file TGLUtil.cxx.

TGLMatrix::TGLMatrix ( const TGLVertex3 origin,
const TGLVector3 zAxis,
const TGLVector3 xAxis 
)

Construct matrix which when applied puts local origin at 'origin' and the local Z axis in direction 'z'.

Both 'origin' and 'zAxisVec' are expressed in the parent frame

Definition at line 696 of file TGLUtil.cxx.

TGLMatrix::TGLMatrix ( const TGLVertex3 origin,
const TGLVector3 zAxis 
)

Construct matrix which when applied puts local origin at 'origin' and the local Z axis in direction 'z'.

Both 'origin' and 'zAxisVec' are expressed in the parent frame

Definition at line 672 of file TGLUtil.cxx.

TGLMatrix::TGLMatrix ( const Double_t  vals[16])

Construct matrix using the 16 Double_t 'vals' passed, ordering is maintained - i.e.

should be column major as we are

Definition at line 707 of file TGLUtil.cxx.

TGLMatrix::TGLMatrix ( const TGLMatrix other)

Construct matrix from 'other'.

Definition at line 715 of file TGLUtil.cxx.

TGLMatrix::~TGLMatrix ( )
virtual

Destroy matrix object.

Definition at line 723 of file TGLUtil.cxx.

Member Function Documentation

Double_t* TGLMatrix::Arr ( )
inline
const Double_t* TGLMatrix::CArr ( ) const
inline
TGLMatrix::ClassDef ( TGLMatrix  ,
 
)
void TGLMatrix::Dump ( ) const

Output 16 matrix components to std::cout.

0 4 8 12 1 5 9 13 2 6 10 14 3 7 11 15

Definition at line 1160 of file TGLUtil.cxx.

TGLVector3 TGLMatrix::GetBaseVec ( Int_t  b) const
inline
void TGLMatrix::GetBaseVec ( Int_t  b,
TGLVector3 v 
) const
inline

Definition at line 763 of file TGLUtil.h.

void TGLMatrix::GetBaseVec ( Int_t  b,
Double_t x 
) const
inline

Definition at line 770 of file TGLUtil.h.

TGLVector3 TGLMatrix::GetScale ( ) const

Get local axis scaling factors.

Definition at line 1127 of file TGLUtil.cxx.

Referenced by TGLPhysicalShape::GetScale().

TGLVector3 TGLMatrix::GetTranslation ( ) const
Double_t TGLMatrix::Invert ( )

Invert the matrix, returns determinant.

Copied from TMatrixFCramerInv.

Definition at line 999 of file TGLUtil.cxx.

Referenced by TGLCamera::SetCenterVec(), and TGLCamera::SetExternalCenter().

Bool_t TGLMatrix::IsScalingForRender ( ) const

Return true if matrix is to be considered a scaling matrix for rendering.

Definition at line 1139 of file TGLUtil.cxx.

Referenced by TGLPhysicalShape::UpdateBoundingBox().

void TGLMatrix::Move3LF ( Double_t  x,
Double_t  y,
Double_t  z 
)

Translate in local frame along all base vectors simultaneously.

Definition at line 850 of file TGLUtil.cxx.

void TGLMatrix::MoveLF ( Int_t  ai,
Double_t  amount 
)
TGLVector3 TGLMatrix::Multiply ( const TGLVector3 v,
Double_t  w = 1 
) const

Multiply vector.

Definition at line 1077 of file TGLUtil.cxx.

void TGLMatrix::MultiplyIP ( TGLVector3 v,
Double_t  w = 1 
) const

Multiply vector in-place.

Definition at line 1103 of file TGLUtil.cxx.

Referenced by TGLLightSet::StdSetupLights().

void TGLMatrix::MultLeft ( const TGLMatrix lhs)

Multiply with matrix lhs on left.

Definition at line 746 of file TGLUtil.cxx.

void TGLMatrix::MultRight ( const TGLMatrix rhs)

Multiply with matrix rhs on right.

Definition at line 730 of file TGLUtil.cxx.

Referenced by operator*=().

TGLMatrix& TGLMatrix::operator*= ( const TGLMatrix rhs)
inline

Definition at line 626 of file TGLUtil.h.

TGLMatrix & TGLMatrix::operator= ( const TGLMatrix rhs)
inline

Definition at line 676 of file TGLUtil.h.

Double_t & TGLMatrix::operator[] ( Int_t  index)
inline

Definition at line 686 of file TGLUtil.h.

Double_t TGLMatrix::operator[] ( Int_t  index) const
inline

Definition at line 697 of file TGLUtil.h.

void TGLMatrix::Rotate ( const TGLVertex3 pivot,
const TGLVector3 axis,
Double_t  angle 
)

Update matrix so resulting transform has been rotated about 'pivot' (in parent frame), round vector 'axis', through 'angle' (radians) Equivalent to glRotate function, but with addition of translation and compounded on top of existing.

Definition at line 898 of file TGLUtil.cxx.

Referenced by TGLPhysicalShape::Rotate().

TGLVector3 TGLMatrix::Rotate ( const TGLVector3 v) const

Rotate vector. Translation is not applied.

Definition at line 1090 of file TGLUtil.cxx.

void TGLMatrix::RotateIP ( TGLVector3 v) const

Rotate vector in-place. Translation is not applied.

Definition at line 1115 of file TGLUtil.cxx.

Referenced by TGLCamera::GetTheta(), and TGLCamera::RotateRad().

void TGLMatrix::RotateLF ( Int_t  i1,
Int_t  i2,
Double_t  amount 
)

Rotate in local frame.

Does optimised version of MultRight. i1, i2 are axes indices: 1 ~ x, 2 ~ y, 3 ~ z.

Definition at line 925 of file TGLUtil.cxx.

Referenced by TGLScenePad::AddHistoPhysical(), TGLCamera::RotateArcBallRad(), and TGLCamera::RotateRad().

void TGLMatrix::RotatePF ( Int_t  i1,
Int_t  i2,
Double_t  amount 
)

Rotate in parent frame. Does optimised version of MultLeft.

Definition at line 942 of file TGLUtil.cxx.

Referenced by TGLCamera::RotateRad().

void TGLMatrix::Scale ( const TGLVector3 scale)

Set matrix axis scales to 'scale'.

Note - this really sets the overall (total) scaling for each axis - it does NOT apply compounded scale on top of existing one

Definition at line 862 of file TGLUtil.cxx.

Referenced by TGLScenePad::AddHistoPhysical(), and TGLPhysicalShape::Scale().

void TGLMatrix::Set ( const TGLVertex3 origin,
const TGLVector3 zAxis,
const TGLVector3 xAxis = 0 
)

Set matrix which when applied puts local origin at 'origin' and the local Z axis in direction 'z'.

Both 'origin' and 'z' are expressed in the parent frame

Definition at line 764 of file TGLUtil.cxx.

Referenced by operator=(), TGLViewer::ReinitializeCurrentCamera(), TGLPhysicalShape::SetTransform(), and TGLCamera::TGLCamera().

void TGLMatrix::Set ( const Double_t  vals[16])

Set matrix using the 16 Double_t 'vals' passed, ordering is maintained - i.e.

should be column major.

Definition at line 783 of file TGLUtil.cxx.

void TGLMatrix::SetBaseVec ( Int_t  b,
Double_t  x,
Double_t  y,
Double_t  z 
)
inline
void TGLMatrix::SetBaseVec ( Int_t  b,
const TGLVector3 v 
)
inline

Definition at line 743 of file TGLUtil.h.

void TGLMatrix::SetBaseVec ( Int_t  b,
Double_t x 
)
inline

Definition at line 750 of file TGLUtil.h.

void TGLMatrix::SetIdentity ( )

Set matrix to identity.

Definition at line 793 of file TGLUtil.cxx.

Referenced by TGLPerspectiveCamera::Reset(), and TGLOrthoCamera::Reset().

void TGLMatrix::SetTranslation ( Double_t  x,
Double_t  y,
Double_t  z 
)

Set matrix translation components x,y,z.

Definition at line 804 of file TGLUtil.cxx.

Referenced by TGLPhysicalShape::SetTranslation().

void TGLMatrix::SetTranslation ( const TGLVertex3 translation)

Set matrix translation components x,y,z.

Definition at line 812 of file TGLUtil.cxx.

void TGLMatrix::TransformVertex ( TGLVertex3 vertex) const

Transform passed 'vertex' by this matrix - converts local frame to parent.

Definition at line 961 of file TGLUtil.cxx.

Referenced by TGLBoundingBox::Transform().

void TGLMatrix::Translate ( const TGLVector3 vect)

Shift matrix translation components by 'vect' in parent frame.

Definition at line 830 of file TGLUtil.cxx.

Referenced by TGLScenePad::AddHistoPhysical(), and TGLPhysicalShape::Translate().

void TGLMatrix::Transpose3x3 ( )

Transpose the top left 3x3 matrix component along major diagonal Supported as currently incompatibility between TGeo and GL matrix layouts for this 3x3 only.

To be resolved.

Definition at line 975 of file TGLUtil.cxx.

Referenced by TGLPhysicalShape::TGLPhysicalShape().

Bool_t TGLMatrix::ValidIndex ( UInt_t  index) const
inlineprivate

Definition at line 607 of file TGLUtil.h.

Member Data Documentation

Double_t TGLMatrix::fVals[16]
private

Definition at line 604 of file TGLUtil.h.

Referenced by Arr(), CArr(), GetBaseVec(), MultLeft(), MultRight(), operator=(), operator[](), and SetBaseVec().


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