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TGLUtil.h
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TGLUtil.h
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// @(#)root/gl:$Id$
// Author: Richard Maunder 25/05/2005
/*************************************************************************
* Copyright (C) 1995-2004, Rene Brun and Fons Rademakers. *
* All rights reserved. *
* *
* For the licensing terms see $ROOTSYS/LICENSE. *
* For the list of contributors see $ROOTSYS/README/CREDITS. *
*************************************************************************/
#ifndef ROOT_TGLUtil
#define ROOT_TGLUtil
#include "Rtypes.h"
#include "TError.h"
#include <vector>
#include <cmath>
#include <cassert>
#include <utility>
class TString;
class TGLBoundingBox;
class TGLCamera;
class TAttMarker;
class TAttLine;
class GLUtesselator;
namespace Rgl
{
enum EOverlap
{
kInside = 0,
kPartial,
kOutside
};
}
enum EGLCoordType
{
kGLCartesian,
kGLPolar,
kGLCylindrical,
kGLSpherical
};
enum EGLPlotType
{
kGLLegoPlot,
kGLSurfacePlot,
kGLBoxPlot,
kGLTF3Plot,
kGLStackPlot,
kGLParametricPlot,
kGLIsoPlot,
kGL5D,
kGLTH3Composition,
kGLVoxel,
kGLDefaultPlot
};
// TODO: Split these into own h/cxx files - too long now!
//////////////////////////////////////////////////////////////////////////
// //
// TGLVertex3 //
// //
// 3 component (x/y/z) vertex class //
// //
// This is part of collection of utility classes for GL 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. They are not intended to be fully featured just provide //
// minimum required. //
//////////////////////////////////////////////////////////////////////////
class TGLVector3; // Forward declare for Shift()
class TGLVertex3
{
protected:
// Fields
Bool_t ValidIndex(UInt_t index) const { return (index < 3); }
Double_t fVals[3];
public:
TGLVertex3();
TGLVertex3(Double_t x, Double_t y, Double_t z);
TGLVertex3(Double_t* v);
TGLVertex3(const TGLVertex3 & other);
~TGLVertex3();
Bool_t operator == (const TGLVertex3 & rhs) const;
TGLVertex3 & operator = (const TGLVertex3 & rhs);
TGLVertex3 & operator *= (Double_t f);
TGLVertex3 operator - () const;
const TGLVertex3 & operator -= (const TGLVector3 & val);
const TGLVertex3 & operator += (const TGLVector3 & val);
// Manipulators
void Fill(Double_t val);
void Set(Double_t x, Double_t y, Double_t z);
void Set(const Double_t* xyz);
void Set(const TGLVertex3 & other);
void Shift(TGLVector3 & shift);
void Shift(Double_t xDelta, Double_t yDelta, Double_t zDelta);
void Negate();
void Minimum(const TGLVertex3 & other);
void Maximum(const TGLVertex3 & other);
// Accessors
Double_t & operator [] (Int_t index);
const Double_t & operator [] (Int_t index) const;
Double_t X() const { return fVals[0]; }
Double_t & X() { return fVals[0]; }
Double_t Y() const { return fVals[1]; }
Double_t & Y() { return fVals[1]; }
Double_t Z() const { return fVals[2]; }
Double_t & Z() { return fVals[2]; }
const Double_t * CArr() const { return fVals; }
Double_t * Arr() { return fVals; }
void Dump() const;
ClassDefNV(TGLVertex3,1); // GL 3 component vertex helper/wrapper class
};
//______________________________________________________________________________
inline TGLVertex3 operator*(Double_t f, const TGLVertex3& v)
{
return TGLVertex3(f*v.X(), f*v.Y(), f*v.Z());
}
//______________________________________________________________________________
inline void TGLVertex3::Negate()
{
fVals[0] = -fVals[0];
fVals[1] = -fVals[1];
fVals[2] = -fVals[2];
}
//______________________________________________________________________________
inline Bool_t TGLVertex3::operator == (const TGLVertex3 & rhs) const
{
return (fVals[0] == rhs.fVals[0] && fVals[1] == rhs.fVals[1] && fVals[2] == rhs.fVals[2]);
}
//______________________________________________________________________________
inline TGLVertex3 & TGLVertex3::operator = (const TGLVertex3 & rhs)
{
// Check for self-assignment
if (this != &rhs) {
Set(rhs);
}
return *this;
}
// operator -= & operator += inline needs to be defered until full TGLVector3 definition
//______________________________________________________________________________
inline TGLVertex3 TGLVertex3::operator - () const
{
return TGLVertex3(-fVals[0], -fVals[1], -fVals[2]);
}
//______________________________________________________________________________
inline TGLVertex3& TGLVertex3::operator *= (Double_t f)
{
fVals[0] *= f;
fVals[1] *= f;
fVals[2] *= f;
return *this;
}
//______________________________________________________________________________
inline Double_t & TGLVertex3::operator [] (Int_t index)
{
/*if (!ValidIndex(index)) {
assert(kFALSE);
return fVals[0];
} else {*/
return fVals[index];
//}
}
//______________________________________________________________________________
inline const Double_t& TGLVertex3::operator [] (Int_t index) const
{
/*if (!ValidIndex(index)) {
assert(kFALSE);
return fVals[0];
} else {*/
return fVals[index];
//}
}
//______________________________________________________________________________
inline void TGLVertex3::Fill(Double_t val)
{
Set(val,val,val);
}
//______________________________________________________________________________
inline void TGLVertex3::Set(Double_t x, Double_t y, Double_t z)
{
fVals[0]=x;
fVals[1]=y;
fVals[2]=z;
}
//______________________________________________________________________________
inline void TGLVertex3::Set(const Double_t* xyz)
{
fVals[0]=xyz[0];
fVals[1]=xyz[1];
fVals[2]=xyz[2];
}
//______________________________________________________________________________
inline void TGLVertex3::Set(const TGLVertex3 & other)
{
fVals[0]=other.fVals[0];
fVals[1]=other.fVals[1];
fVals[2]=other.fVals[2];
}
//////////////////////////////////////////////////////////////////////////
// //
// TGLVector3 //
// //
// 3 component (x/y/z) vector class //
// //
// This is part of collection of utility classes for GL 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. They are not intended to be fully featured just provide //
// minimum required. //
//////////////////////////////////////////////////////////////////////////
class TGLVector3 : public TGLVertex3
{
public:
TGLVector3() = default;
TGLVector3(Double_t x, Double_t y, Double_t z);
TGLVector3(const Double_t *src);
TGLVector3& operator = (const TGLVertex3& v)
{ fVals[0] = v[0]; fVals[1] = v[1]; fVals[2] = v[2]; return *this; }
TGLVector3 & operator /= (Double_t val);
TGLVector3 operator - () const;
Double_t Mag() const;
void Normalise();
ClassDefNV(TGLVector3,1); // GL 3 component vector helper/wrapper class
};
// Inline for TGLVertex3 requiring full TGLVector definition
//______________________________________________________________________________
inline const TGLVertex3 & TGLVertex3::operator -= (const TGLVector3 & vec)
{
fVals[0] -= vec[0]; fVals[1] -= vec[1]; fVals[2] -= vec[2];
return *this;
}
// Inline for TGLVertex3 requiring full TGLVector definition
//______________________________________________________________________________
inline const TGLVertex3 & TGLVertex3::operator += (const TGLVector3 & vec)
{
fVals[0] += vec[0]; fVals[1] += vec[1]; fVals[2] += vec[2];
return *this;
}
//______________________________________________________________________________
inline TGLVector3 & TGLVector3::operator /= (Double_t val)
{
fVals[0] /= val;
fVals[1] /= val;
fVals[2] /= val;
return *this;
}
//______________________________________________________________________________
inline TGLVector3 TGLVector3::operator - () const
{
return TGLVector3(-fVals[0], -fVals[1], -fVals[2]);
}
//______________________________________________________________________________
inline Double_t TGLVector3::Mag() const
{
return std::sqrt(fVals[0]*fVals[0] + fVals[1]*fVals[1] + fVals[2]*fVals[2]);
}
//______________________________________________________________________________
inline void TGLVector3::Normalise()
{
Double_t mag = Mag();
if ( mag == 0.0 ) {
Error("TGLVector3::Normalise", "vector has zero magnitude");
return;
}
fVals[0] /= mag;
fVals[1] /= mag;
fVals[2] /= mag;
}
//______________________________________________________________________________
inline Double_t Dot(const TGLVector3 & v1, const TGLVector3 & v2)
{
return v1[0]*v2[0] + v1[1]*v2[1] + v1[2]*v2[2];
}
//______________________________________________________________________________
inline TGLVector3 Cross(const TGLVector3 & v1, const TGLVector3 & v2)
{
return TGLVector3(v1[1]*v2[2] - v2[1]*v1[2],
v1[2]*v2[0] - v2[2]*v1[0],
v1[0]*v2[1] - v2[0]*v1[1]);
}
//______________________________________________________________________________
inline const TGLVector3 operator / (const TGLVector3 & vec, Double_t val)
{
return TGLVector3(vec[0] / val, vec[1] / val, vec[2] / val);
}
//______________________________________________________________________________
inline const TGLVector3 operator * (const TGLVector3 & vec, Double_t val)
{
return TGLVector3(vec[0] * val, vec[1] * val, vec[2] * val);
}
//______________________________________________________________________________
// Vertex + Vector => Vertex
inline TGLVertex3 operator + (const TGLVertex3 & vertex1, const TGLVector3 & vertex2)
{
return TGLVertex3(vertex1[0] + vertex2[0], vertex1[1] + vertex2[1], vertex1[2] + vertex2[2]);
}
//______________________________________________________________________________
// Vertex - Vertex => Vector
inline TGLVector3 operator - (const TGLVertex3 & vertex1, const TGLVertex3 & vertex2)
{
return TGLVector3(vertex1[0] - vertex2[0], vertex1[1] - vertex2[1], vertex1[2] - vertex2[2]);
}
//______________________________________________________________________________
// Vector + Vector => Vector
inline TGLVector3 operator + (const TGLVector3 & vector1, const TGLVector3 & vector2)
{
return TGLVector3(vector1[0] + vector2[0], vector1[1] + vector2[1], vector1[2] + vector2[2]);
}
//______________________________________________________________________________
// Vector - Vector => Vector
inline TGLVector3 operator - (const TGLVector3 & vector1, const TGLVector3 & vector2)
{
return TGLVector3(vector1[0] - vector2[0], vector1[1] - vector2[1], vector1[2] - vector2[2]);
}
//______________________________________________________________________________
// Dot-product
inline Double_t operator * (const TGLVector3 & a, const TGLVector3 & b)
{
return a[0]*b[0] + a[1]*b[1] + a[2]*b[2];
}
//////////////////////////////////////////////////////////////////////////
// //
// TGLLine3 //
// //
// 3D space, fixed length, line class, with direction / length 'vector',//
// passing through point 'vertex'. Just wraps a TGLVector3 / TGLVertex3 //
// pair. //
//////////////////////////////////////////////////////////////////////////
class TGLLine3
{
private:
// Fields
TGLVertex3 fVertex; //! Start vertex of line
TGLVector3 fVector; //! Vector of line from fVertex
public:
TGLLine3(const TGLVertex3 & start, const TGLVertex3 & end);
TGLLine3(const TGLVertex3 & start, const TGLVector3 & vector);
~TGLLine3() = default;
void Set(const TGLVertex3 & start, const TGLVertex3 & end);
void Set(const TGLVertex3 & start, const TGLVector3 & vector);
// Bitwise copy constructor and = operator are fine
// Accessors
const TGLVertex3 & Start() const { return fVertex; }
const TGLVertex3 End() const { return fVertex + fVector; }
const TGLVector3 & Vector() const { return fVector; }
// Debug
void Draw() const;
ClassDefNV(TGLLine3,0); // GL line wrapper class
};
//////////////////////////////////////////////////////////////////////////
// //
// TGLRect //
// //
// Viewport (pixel base) 2D rectangle class //
//////////////////////////////////////////////////////////////////////////
class TGLRect
{
private:
// Fields
Int_t fX, fY; //! Corner
Int_t fWidth, fHeight; //! Positive width/height
public:
TGLRect();
TGLRect(Int_t x, Int_t y, Int_t width, Int_t height);
TGLRect(Int_t x, Int_t y, UInt_t width, UInt_t height);
virtual ~TGLRect();
// Bitwise copy const & =op are ok at present
// Manipulators
void Set(Int_t x, Int_t y, Int_t width, Int_t height);
void SetCorner(Int_t x, Int_t y);
void Offset(Int_t dX, Int_t dY);
void Expand(Int_t x, Int_t y);
// Accessors
const Int_t* CArr() const { return &fX; }
Int_t* CArr() { return &fX; }
Int_t X() const { return fX; }
Int_t & X() { return fX; }
Int_t Y() const { return fY; }
Int_t & Y() { return fY; }
Int_t Width() const { return fWidth; }
Int_t & Width() { return fWidth; }
Int_t Height() const { return fHeight; }
Int_t & Height() { return fHeight; }
Int_t CenterX() const { return fX + fWidth/2; }
Int_t CenterY() const { return fY + fHeight/2; }
Int_t Left() const { return fX; }
Int_t Right() const { return fX + fWidth; }
Int_t Top() const { return fY; }
Int_t Bottom() const { return fY + fHeight; }
Int_t Diagonal() const;
Int_t Longest() const;
Double_t Aspect() const;
Rgl::EOverlap Overlap(const TGLRect & other) const;
ClassDef(TGLRect,0); // GL rect helper/wrapper class
};
//______________________________________________________________________________
inline void TGLRect::Set(Int_t x, Int_t y, Int_t width, Int_t height)
{
fX = x;
fY = y;
fWidth = width;
fHeight = height;
}
//______________________________________________________________________________
inline void TGLRect::SetCorner(Int_t x, Int_t y)
{
fX = x;
fY = y;
}
//______________________________________________________________________________
inline void TGLRect::Offset(Int_t dX, Int_t dY)
{
fX += dX;
fY += dY;
}
//______________________________________________________________________________
inline Int_t TGLRect::Longest() const
{
return fWidth > fHeight ? fWidth : fHeight;
}
//______________________________________________________________________________
inline Double_t TGLRect::Aspect() const
{
// Return aspect ratio (width/height)
if (fHeight == 0) {
return 0.0;
} else {
return static_cast<Double_t>(fWidth) / static_cast<Double_t>(fHeight);
}
}
//////////////////////////////////////////////////////////////////////////
// //
// 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. //
//////////////////////////////////////////////////////////////////////////
class TGLPlane
{
private:
// Fields
Double_t fVals[4];
// Methods
void Normalise();
public:
TGLPlane();
TGLPlane(const TGLPlane & other);
TGLPlane(Double_t a, Double_t b, Double_t c, Double_t d);
TGLPlane(Double_t eq[4]);
TGLPlane(const TGLVector3 & norm, const TGLVertex3 & point);
TGLPlane(const TGLVertex3 & p1, const TGLVertex3 & p2, const TGLVertex3 & p3);
~TGLPlane() = default;
TGLPlane &operator=(const TGLPlane &src);
// Manipulators
void Set(const TGLPlane & other);
void Set(Double_t a, Double_t b, Double_t c, Double_t d);
void Set(Double_t eq[4]);
void Set(const TGLVector3 & norm, const TGLVertex3 & point);
void Set(const TGLVertex3 & p1, const TGLVertex3 & p2, const TGLVertex3 & p3);
void Negate();
// Accessors
Double_t A() const { return fVals[0]; }
Double_t B() const { return fVals[1]; }
Double_t C() const { return fVals[2]; }
Double_t D() const { return fVals[3]; }
TGLVector3 Norm() const { return TGLVector3( fVals[0], fVals[1], fVals[2]); }
Double_t DistanceTo(const TGLVertex3 & vertex) const;
TGLVertex3 NearestOn(const TGLVertex3 & point) const;
// Internal data accessors - for GL API
const Double_t * CArr() const { return fVals; }
Double_t * Arr() { return fVals; }
void Dump() const;
ClassDefNV(TGLPlane,0); // GL plane helper/wrapper class
};
typedef std::vector<TGLPlane> TGLPlaneSet_t;
typedef std::vector<TGLPlane>::iterator TGLPlaneSet_i;
typedef std::vector<TGLPlane>::const_iterator TGLPlaneSet_ci;
// Some free functions for planes
std::pair<Bool_t, TGLLine3> Intersection(const TGLPlane & p1, const TGLPlane & p2);
std::pair<Bool_t, TGLVertex3> Intersection(const TGLPlane & p1, const TGLPlane & p2, const TGLPlane & p3);
std::pair<Bool_t, TGLVertex3> Intersection(const TGLPlane & plane, const TGLLine3 & line, Bool_t extend);
//////////////////////////////////////////////////////////////////////////
// //
// TGLMatrix //
// //
// 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. //
//////////////////////////////////////////////////////////////////////////
class TGLMatrix
{
private:
// Fields
Double_t fVals[16]; // Column MAJOR as per OGL
// Methods
Bool_t ValidIndex(UInt_t index) const { return (index < 16); }
public:
TGLMatrix();
TGLMatrix(Double_t x, Double_t y, Double_t z);
TGLMatrix(const TGLVertex3 & translation);
TGLMatrix(const TGLVertex3 & origin, const TGLVector3 & zAxis, const TGLVector3 & xAxis);
TGLMatrix(const TGLVertex3 & origin, const TGLVector3 & zAxis);
TGLMatrix(const Double_t vals[16]);
TGLMatrix(const TGLMatrix & other);
virtual ~TGLMatrix();
// Operators
TGLMatrix & operator =(const TGLMatrix & rhs);
Double_t & operator [] (Int_t index);
Double_t operator [] (Int_t index) const;
void MultRight(const TGLMatrix & rhs);
void MultLeft (const TGLMatrix & lhs);
TGLMatrix & operator*=(const TGLMatrix & rhs) { MultRight(rhs); return *this; }
// Manipulators
void Set(const TGLVertex3 & origin, const TGLVector3 & zAxis, const TGLVector3 & xAxis = nullptr);
void Set(const Double_t vals[16]);
void SetIdentity();
void SetTranslation(Double_t x, Double_t y, Double_t z);
void SetTranslation(const TGLVertex3 & translation);
void Translate(const TGLVector3 & vect);
void MoveLF(Int_t ai, Double_t amount);
void Move3LF(Double_t x, Double_t y, Double_t z);
void Scale(const TGLVector3 & scale);
void Rotate(const TGLVertex3 & pivot, const TGLVector3 & axis, Double_t angle);
void RotateLF(Int_t i1, Int_t i2, Double_t amount);
void RotatePF(Int_t i1, Int_t i2, Double_t amount);
void TransformVertex(TGLVertex3 & vertex) const;
void Transpose3x3();
Double_t Invert();
// Accesors
TGLVector3 GetTranslation() const;
TGLVector3 GetScale() const;
Bool_t IsScalingForRender() const;
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;
TGLVector3 Rotate(const TGLVector3& v) const;
void MultiplyIP(TGLVector3& v, Double_t w=1) const;
void RotateIP(TGLVector3& v) const;
// Internal data accessors - for GL API
const Double_t * CArr() const { return fVals; }
Double_t * Arr() { return fVals; }
void Dump() const;
ClassDef(TGLMatrix,1); // GL matrix helper/wrapper class
};
//______________________________________________________________________________
inline TGLMatrix & TGLMatrix::operator =(const TGLMatrix & rhs)
{
// Check for self-assignment
if (this != &rhs) {
Set(rhs.fVals);
}
return *this;
}
//______________________________________________________________________________
inline Double_t & TGLMatrix::operator [] (Int_t index)
{
/*if (!ValidIndex(index)) {
assert(kFALSE);
return fVals[0];
} else {*/
return fVals[index];
//}
}
//______________________________________________________________________________
inline Double_t TGLMatrix::operator [] (Int_t index) const
{
/*if (!ValidIndex(index)) {
assert(kFALSE);
return fVals[0];
} else {*/
return fVals[index];
//}
}
//______________________________________________________________________________
inline TGLMatrix operator * (const TGLMatrix & lhs, const TGLMatrix & rhs)
{
TGLMatrix res;
res[ 0] = rhs[ 0] * lhs[ 0] + rhs[ 1] * lhs[ 4] + rhs[ 2] * lhs[ 8] + rhs[ 3] * lhs[12];
res[ 1] = rhs[ 0] * lhs[ 1] + rhs[ 1] * lhs[ 5] + rhs[ 2] * lhs[ 9] + rhs[ 3] * lhs[13];
res[ 2] = rhs[ 0] * lhs[ 2] + rhs[ 1] * lhs[ 6] + rhs[ 2] * lhs[10] + rhs[ 3] * lhs[14];
res[ 3] = rhs[ 0] * lhs[ 3] + rhs[ 1] * lhs[ 7] + rhs[ 2] * lhs[11] + rhs[ 3] * lhs[15];
res[ 4] = rhs[ 4] * lhs[ 0] + rhs[ 5] * lhs[ 4] + rhs[ 6] * lhs[ 8] + rhs[ 7] * lhs[12];
res[ 5] = rhs[ 4] * lhs[ 1] + rhs[ 5] * lhs[ 5] + rhs[ 6] * lhs[ 9] + rhs[ 7] * lhs[13];
res[ 6] = rhs[ 4] * lhs[ 2] + rhs[ 5] * lhs[ 6] + rhs[ 6] * lhs[10] + rhs[ 7] * lhs[14];
res[ 7] = rhs[ 4] * lhs[ 3] + rhs[ 5] * lhs[ 7] + rhs[ 6] * lhs[11] + rhs[ 7] * lhs[15];
res[ 8] = rhs[ 8] * lhs[ 0] + rhs[ 9] * lhs[ 4] + rhs[10] * lhs[ 8] + rhs[11] * lhs[12];
res[ 9] = rhs[ 8] * lhs[ 1] + rhs[ 9] * lhs[ 5] + rhs[10] * lhs[ 9] + rhs[11] * lhs[13];
res[10] = rhs[ 8] * lhs[ 2] + rhs[ 9] * lhs[ 6] + rhs[10] * lhs[10] + rhs[11] * lhs[14];
res[11] = rhs[ 8] * lhs[ 3] + rhs[ 9] * lhs[ 7] + rhs[10] * lhs[11] + rhs[11] * lhs[15];
res[12] = rhs[12] * lhs[ 0] + rhs[13] * lhs[ 4] + rhs[14] * lhs[ 8] + rhs[15] * lhs[12];
res[13] = rhs[12] * lhs[ 1] + rhs[13] * lhs[ 5] + rhs[14] * lhs[ 9] + rhs[15] * lhs[13];
res[14] = rhs[12] * lhs[ 2] + rhs[13] * lhs[ 6] + rhs[14] * lhs[10] + rhs[15] * lhs[14];
res[15] = rhs[12] * lhs[ 3] + rhs[13] * lhs[ 7] + rhs[14] * lhs[11] + rhs[15] * lhs[15];
return res;
}
//______________________________________________________________________________
inline void TGLMatrix::SetBaseVec(Int_t b, Double_t x, Double_t y, Double_t z)
{
Double_t* C = fVals + 4*--b;
C[0] = x; C[1] = y; C[2] = z;
}
//______________________________________________________________________________
inline void TGLMatrix::SetBaseVec(Int_t b, const TGLVector3& v)
{
Double_t* C = fVals + 4*--b;
C[0] = v[0]; C[1] = v[1]; C[2] = v[2];
}
//______________________________________________________________________________
inline void TGLMatrix::SetBaseVec(Int_t b, Double_t* x)
{
Double_t* C = fVals + 4*--b;
C[0] = x[0]; C[1] = x[1]; C[2] = x[2];
}
//______________________________________________________________________________
inline TGLVector3 TGLMatrix::GetBaseVec(Int_t b) const
{
return TGLVector3(&fVals[4*--b]);
}
//______________________________________________________________________________
inline void TGLMatrix::GetBaseVec(Int_t b, TGLVector3& v) const
{
const Double_t* C = fVals + 4*--b;
v[0] = C[0]; v[1] = C[1]; v[2] = C[2];
}
//______________________________________________________________________________
inline void TGLMatrix::GetBaseVec(Int_t b, Double_t* x) const
{
const Double_t* C = fVals + 4*--b;
x[0] = C[0], x[1] = C[1], x[2] = C[2];
}
//////////////////////////////////////////////////////////////////////////
//
// TGLColor
//
// Encapsulate color in preferred GL format - UChar_t RGBA array.
// Color index is also cached for easier interfacing with the
// traditional ROOT graphics.
//
//////////////////////////////////////////////////////////////////////////
class TGLColor
{
protected:
UChar_t fRGBA[4];
mutable Short_t fIndex;
public:
TGLColor();
TGLColor(Int_t r, Int_t g, Int_t b, Int_t a=255);
TGLColor(Float_t r, Float_t g, Float_t b, Float_t a=1);
TGLColor(Color_t color_index, Char_t transparency=0);
TGLColor(const TGLColor& c);
TGLColor& operator=(const TGLColor& c);
UChar_t* Arr() { return fRGBA; }
const UChar_t* CArr() const { return fRGBA; }
UChar_t GetRed() const { return fRGBA[0]; }
UChar_t GetGreen() const { return fRGBA[1]; }
UChar_t GetBlue() const { return fRGBA[2]; }
UChar_t GetAlpha() const { return fRGBA[3]; }
Color_t GetColorIndex() const;
Char_t GetTransparency() const;
void SetRed(Int_t v) { fRGBA[0] = v; }
void SetGreen(Int_t v) { fRGBA[1] = v; }
void SetBlue(Int_t v) { fRGBA[2] = v; }
void SetAlpha(Int_t v) { fRGBA[3] = v; }
void SetColor(Int_t r, Int_t g, Int_t b, Int_t a=255);
void SetColor(Float_t r, Float_t g, Float_t b, Float_t a=1);
void SetColor(Color_t color_index);
void SetColor(Color_t color_index, Char_t transparency);
void SetTransparency(Char_t transparency);
TString AsString() const;
ClassDefNV(TGLColor, 0); // Color in preferred GL format - RGBA.
};
//////////////////////////////////////////////////////////////////////////
//
// TGLColorSet
//
// A collection of colors used for OpenGL rendering.
//
//////////////////////////////////////////////////////////////////////////
class TGLColorSet
{
protected:
TGLColor fBackground;
TGLColor fForeground;
TGLColor fOutline;
TGLColor fMarkup;
TGLColor fSelection[5]; // Colors for shape-selection-levels
public:
TGLColorSet();
TGLColorSet(const TGLColorSet& s);
~TGLColorSet() = default;
TGLColorSet& operator=(const TGLColorSet& s);
TGLColor& Background() { return fBackground; }
TGLColor& Foreground() { return fForeground; }
TGLColor& Outline() { return fOutline; }
TGLColor& Markup() { return fMarkup; }
TGLColor& Selection(Int_t i) { return fSelection[i]; }
const TGLColor& Background() const { return fBackground; }
const TGLColor& Foreground() const { return fForeground; }
const TGLColor& Outline() const { return fOutline; }
const TGLColor& Markup() const { return fMarkup; }
const TGLColor& Selection(Int_t i) const { return fSelection[i]; }
void StdDarkBackground();
void StdLightBackground();
ClassDefNV(TGLColorSet, 0); // Collection of colors used for GL rendering.
};
//////////////////////////////////////////////////////////////////////////
// //
// TGLUtil //
// //
// Wrapper class for various misc static functions - error checking, //
// draw helpers etc. //
// //
//////////////////////////////////////////////////////////////////////////
class TGLUtil
{
public:
class TColorLocker
{
public:
TColorLocker() { LockColor(); }
virtual ~TColorLocker() { UnlockColor(); }
ClassDef(TColorLocker,0); // Lock/unlock color in constructor/destructor.
};
class TDrawQualityModifier
{
Int_t fOldQuality;
public:
TDrawQualityModifier(Int_t dq) :
fOldQuality(GetDrawQuality()) {SetDrawQuality(dq); }
virtual ~TDrawQualityModifier()
{ SetDrawQuality(fOldQuality); }
ClassDef(TDrawQualityModifier,0); // Set/restore draw quality in constructor/destructor.
};
class TDrawQualityScaler
{
Int_t fOldQuality;
public:
TDrawQualityScaler(Float_t fac) :
fOldQuality(GetDrawQuality()) {SetDrawQuality((Int_t)(fac*fOldQuality)); }
virtual ~TDrawQualityScaler()
{ SetDrawQuality(fOldQuality); }
ClassDef(TDrawQualityScaler,0); // Multiply/restore draw quality in constructor/destructor.
};
private:
static UInt_t fgDefaultDrawQuality;
static UInt_t fgDrawQuality;
static UInt_t fgColorLockCount;
static Float_t fgPointSize;
static Float_t fgLineWidth;
static Float_t fgPointSizeScale;
static Float_t fgLineWidthScale;
static Float_t fgScreenScalingFactor;
static Float_t fgPointLineScalingFactor;
static Int_t fgPickingRadius;
static Float_t fgSimpleAxisWidthScale;
static Float_t fgSimpleAxisBBoxScale;
TGLUtil(const TGLUtil&) = delete;
TGLUtil& operator=(const TGLUtil&) = delete;
public:
virtual ~TGLUtil() {}
static void InitializeIfNeeded();
// Error checking
static Int_t CheckError(const char * loc);
// Polygon tesselator for direct drawing
static GLUtesselator* GetDrawTesselator3fv();
static GLUtesselator* GetDrawTesselator4fv();
static GLUtesselator* GetDrawTesselator3dv();
static GLUtesselator* GetDrawTesselator4dv();
// Some simple shape drawing utils
enum ELineHeadShape { kLineHeadNone, kLineHeadArrow, kLineHeadBox };
enum EAxesType { kAxesNone, kAxesEdge, kAxesOrigin };
static UInt_t GetDrawQuality();
static void SetDrawQuality(UInt_t dq);
static void ResetDrawQuality();
static UInt_t GetDefaultDrawQuality();
static void SetDefaultDrawQuality(UInt_t dq);
static UInt_t LockColor();
static UInt_t UnlockColor();
static Bool_t IsColorLocked();
static void Color(const TGLColor& color);
static void ColorAlpha(const TGLColor& color, UChar_t alpha);
static void ColorAlpha(const TGLColor& color, Float_t alpha);
static void ColorAlpha(Color_t color_index, Float_t alpha=1);
static void ColorTransparency(Color_t color_index, Char_t transparency=0);
static void Color3ub(UChar_t r, UChar_t g, UChar_t b);
static void Color4ub(UChar_t r, UChar_t g, UChar_t b, UChar_t a);
static void Color3ubv(const UChar_t* rgb);
static void Color4ubv(const UChar_t* rgba);
static void Color3f(Float_t r, Float_t g, Float_t b);
static void Color4f(Float_t r, Float_t g, Float_t b, Float_t a);
static void Color3fv(const Float_t* rgb);
static void Color4fv(const Float_t* rgba);
// Coordinate conversion and extra scaling (needed for osx retina)
static void PointToViewport(Int_t& x, Int_t& y);
static void PointToViewport(Int_t& x, Int_t& y, Int_t& w, Int_t& h);
static Float_t GetScreenScalingFactor();
static Float_t GetPointLineScalingFactor();
static Int_t GetPickingRadius();
static Float_t GetPointSizeScale();
static void SetPointSizeScale(Float_t scale);
static Float_t GetLineWidthScale();
static void SetLineWidthScale(Float_t scale);
static void PointSize(Float_t point_size);
static void LineWidth(Float_t line_width);
static Float_t PointSize();
static Float_t LineWidth();
static void BeginExtendPickRegion(Float_t scale);
static void EndExtendPickRegion();
static void RenderPolyMarkers(const TAttMarker& marker, Char_t transp,
Float_t* p, Int_t n,