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TEveTrans.cxx
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TEveTrans.cxx
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// @(#)root/eve:$Id$
// Authors: Matevz Tadel & Alja Mrak-Tadel: 2006, 2007
/*************************************************************************
* Copyright (C) 1995-2007, Rene Brun and Fons Rademakers. *
* All rights reserved. *
* *
* For the licensing terms see $ROOTSYS/LICENSE. *
* For the list of contributors see $ROOTSYS/README/CREDITS. *
*************************************************************************/
#include "TEveTrans.h"
#include "TEveUtil.h"
#include "TMath.h"
#include "TClass.h"
#include "Riostream.h"
#include <cctype>
#define F00 0
#define F01 4
#define F02 8
#define F03 12
#define F10 1
#define F11 5
#define F12 9
#define F13 13
#define F20 2
#define F21 6
#define F22 10
#define F23 14
#define F30 3
#define F31 7
#define F32 11
#define F33 15
/** \class TEveTrans
\ingroup TEve
TEveTrans is a 4x4 transformation matrix for homogeneous coordinates
stored internally in a column-major order to allow direct usage by
GL. The element type is Double32_t as statically the floats would
be precise enough but continuous operations on the matrix must
retain precision of column vectors.
Cartan angles are stored in fA[1-3] (+z, -y, +x). They are
recalculated on demand.
Direct element access (first two should be used with care):
- operator[i] direct access to elements, i:0->15
- CM(i,j) element 4*j + i; i,j:0->3 { CM ~ c-matrix }
- operator(i,j) element 4*(j-1) + i - 1 i,j:1->4
Column-vector access:
USet Get/SetBaseVec(), Get/SetPos() and Arr[XYZT]() methods.
For all methods taking the matrix indices:
1->X, 2->Y, 3->Z; 4->Position (if applicable). 0 reserved for time.
Shorthands in method-names:
LF ~ LocalFrame; PF ~ ParentFrame; IP ~ InPlace
*/
ClassImp(TEveTrans);
////////////////////////////////////////////////////////////////////////////////
/// Default constructor.
TEveTrans::TEveTrans() :
TObject(),
fA1(0), fA2(0), fA3(0), fAsOK(kFALSE),
fUseTrans (kTRUE),
fEditTrans(kFALSE),
fEditRotation(kTRUE),
fEditScale(kTRUE)
{
UnitTrans();
}
////////////////////////////////////////////////////////////////////////////////
/// Constructor.
TEveTrans::TEveTrans(const TEveTrans& t) :
TObject(),
fA1(t.fA1), fA2(t.fA2), fA3(t.fA3), fAsOK(t.fAsOK),
fUseTrans (t.fUseTrans),
fEditTrans(t.fEditTrans),
fEditRotation(kTRUE),
fEditScale(kTRUE)
{
SetTrans(t, kFALSE);
}
////////////////////////////////////////////////////////////////////////////////
/// Constructor.
TEveTrans::TEveTrans(const Double_t arr[16]) :
TObject(),
fA1(0), fA2(0), fA3(0), fAsOK(kFALSE),
fUseTrans (kTRUE),
fEditTrans(kFALSE),
fEditRotation(kTRUE),
fEditScale(kTRUE)
{
SetFromArray(arr);
}
////////////////////////////////////////////////////////////////////////////////
/// Constructor.
TEveTrans::TEveTrans(const Float_t arr[16]) :
TObject(),
fA1(0), fA2(0), fA3(0), fAsOK(kFALSE),
fUseTrans (kTRUE),
fEditTrans(kFALSE),
fEditRotation(kTRUE),
fEditScale(kTRUE)
{
SetFromArray(arr);
}
////////////////////////////////////////////////////////////////////////////////
/// Reset matrix to unity.
void TEveTrans::UnitTrans()
{
memset(fM, 0, 16*sizeof(Double_t));
fM[F00] = fM[F11] = fM[F22] = fM[F33] = 1;
fA1 = fA2 = fA3 = 0;
fAsOK = kTRUE;
}
////////////////////////////////////////////////////////////////////////////////
/// Reset matrix to zero, only the perspective scaling is set to w
/// (1 by default).
void TEveTrans::ZeroTrans(Double_t w)
{
memset(fM, 0, 16*sizeof(Double_t));
fM[F33] = w;
fA1 = fA2 = fA3 = 0;
fAsOK = kFALSE;
}
////////////////////////////////////////////////////////////////////////////////
/// Reset rotation part of the matrix to unity.
void TEveTrans::UnitRot()
{
memset(fM, 0, 12*sizeof(Double_t));
fM[F00] = fM[F11] = fM[F22] = 1;
fA1 = fA2 = fA3 = 0;
fAsOK = kTRUE;
}
////////////////////////////////////////////////////////////////////////////////
/// Set matrix from another,
void TEveTrans::SetTrans(const TEveTrans& t, Bool_t copyAngles)
{
memcpy(fM, t.fM, sizeof(fM));
if (copyAngles && t.fAsOK) {
fAsOK = kTRUE;
fA1 = t.fA1; fA2 = t.fA2; fA3 = t.fA3;
} else {
fAsOK = kFALSE;
}
}
////////////////////////////////////////////////////////////////////////////////
/// Set matrix from Double_t array.
void TEveTrans::SetFromArray(const Double_t arr[16])
{
for(Int_t i=0; i<16; ++i) fM[i] = arr[i];
fAsOK = kFALSE;
}
////////////////////////////////////////////////////////////////////////////////
/// Set matrix from Float_t array.
void TEveTrans::SetFromArray(const Float_t arr[16])
{
for(Int_t i=0; i<16; ++i) fM[i] = arr[i];
fAsOK = kFALSE;
}
////////////////////////////////////////////////////////////////////////////////
/// Setup the matrix as an elementary rotation.
/// Optimized versions of left/right multiplication with an elementary
/// rotation matrix are implemented in RotatePF/RotateLF.
/// Expects identity matrix.
void TEveTrans::SetupRotation(Int_t i, Int_t j, Double_t f)
{
if(i == j) return;
TEveTrans& t = *this;
t(i,i) = t(j,j) = TMath::Cos(f);
Double_t s = TMath::Sin(f);
t(i,j) = -s; t(j,i) = s;
fAsOK = kFALSE;
}
////////////////////////////////////////////////////////////////////////////////
/// A function for creating a rotation matrix that rotates a vector called
/// "from" into another vector called "to".
/// Input : from[3], to[3] which both must be *normalized* non-zero vectors
/// Output: mtx[3][3] -- a 3x3 matrix in column-major form
///
/// Authors: Tomas Möller, John Hughes
/// "Efficiently Building a Matrix to Rotate One Vector to Another"
/// Journal of Graphics Tools, 4(4):1-4, 1999
void TEveTrans::SetupFromToVec(const TEveVector& from, const TEveVector& to)
{
static const float kFromToEpsilon = 0.000001f;
ZeroTrans();
Float_t e, f;
e = from.Dot(to);
f = (e < 0.0f) ? -e : e;
if (f > 1.0f - kFromToEpsilon) /* "from" and "to"-vector almost parallel */
{
TEveVector u, v; /* temporary storage vectors */
TEveVector x; /* vector most nearly orthogonal to "from" */
Float_t c1, c2, c3; /* coefficients for later use */
x.fX = (from.fX > 0.0f) ? from.fX : -from.fX;
x.fY = (from.fY > 0.0f) ? from.fY : -from.fY;
x.fZ = (from.fZ > 0.0f) ? from.fZ : -from.fZ;
if (x.fX < x.fY)
{
if (x.fX < x.fZ) {
x.fX = 1.0f; x.fY = x.fZ = 0.0f;
} else {
x.fZ = 1.0f; x.fX = x.fY = 0.0f;
}
}
else
{
if (x.fY < x.fZ) {
x.fY = 1.0f; x.fX = x.fZ = 0.0f;
} else {
x.fZ = 1.0f; x.fX = x.fY = 0.0f;
}
}
u.Sub(x, from);
v.Sub(x, to);
c1 = 2.0f / u.Mag2();
c2 = 2.0f / v.Mag2();
c3 = c1 * c2 * u.Dot(v);
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
CM(i, j) = - c1 * u[i] * u[j]
- c2 * v[i] * v[j]
+ c3 * v[i] * u[j];
}
CM(i, i) += 1.0;
}
}
else /* the most common case, unless "from"="to", or "from"=-"to" */
{
TEveVector v = from.Cross(to);
Float_t h, hvx, hvz, hvxy, hvxz, hvyz;
h = 1.0f/(1.0f + e);
hvx = h * v.fX;
hvz = h * v.fZ;
hvxy = hvx * v.fY;
hvxz = hvx * v.fZ;
hvyz = hvz * v.fY;
CM(0, 0) = e + hvx * v.fX;
CM(0, 1) = hvxy - v.fZ;
CM(0, 2) = hvxz + v.fY;
CM(1, 0) = hvxy + v.fZ;
CM(1, 1) = e + h * v.fY * v.fY;
CM(1, 2) = hvyz - v.fX;
CM(2, 0) = hvxz - v.fY;
CM(2, 1) = hvyz + v.fX;
CM(2, 2) = e + hvz * v.fZ;
}
}
////////////////////////////////////////////////////////////////////////////////
/// Multiply from left: this = t * this.
void TEveTrans::MultLeft(const TEveTrans& t)
{
Double_t buf[4];
Double_t* col = fM;
for(int c=0; c<4; ++c, col+=4) {
const Double_t* row = t.fM;
for(int r=0; r<4; ++r, ++row)
buf[r] = row[0]*col[0] + row[4]*col[1] + row[8]*col[2] + row[12]*col[3];
col[0] = buf[0]; col[1] = buf[1]; col[2] = buf[2]; col[3] = buf[3];
}
fAsOK = kFALSE;
}
////////////////////////////////////////////////////////////////////////////////
/// Multiply from right: this = this * t.
void TEveTrans::MultRight(const TEveTrans& t)
{
Double_t buf[4];
Double_t* row = fM;
for(int r=0; r<4; ++r, ++row) {
const Double_t* col = t.fM;
for(int c=0; c<4; ++c, col+=4)
buf[c] = row[0]*col[0] + row[4]*col[1] + row[8]*col[2] + row[12]*col[3];
row[0] = buf[0]; row[4] = buf[1]; row[8] = buf[2]; row[12] = buf[3];
}
fAsOK = kFALSE;
}
////////////////////////////////////////////////////////////////////////////////
/// Copy, multiply from right and return product.
/// Avoid unless necessary.
TEveTrans TEveTrans::operator*(const TEveTrans& t)
{
TEveTrans b(*this);
b.MultRight(t);
return b;
}
////////////////////////////////////////////////////////////////////////////////
/// Transpose 3x3 rotation sub-matrix.
void TEveTrans::TransposeRotationPart()
{
Double_t x;
x = fM[F01]; fM[F01] = fM[F10]; fM[F10] = x;
x = fM[F02]; fM[F02] = fM[F20]; fM[F20] = x;
x = fM[F12]; fM[F12] = fM[F21]; fM[F21] = x;
fAsOK = kFALSE;
}
////////////////////////////////////////////////////////////////////////////////
/// Move in local-frame along axis with index ai.
void TEveTrans::MoveLF(Int_t ai, Double_t amount)
{
const Double_t *col = fM + 4*--ai;
fM[F03] += amount*col[0]; fM[F13] += amount*col[1]; fM[F23] += amount*col[2];
}
////////////////////////////////////////////////////////////////////////////////
/// General move in local-frame.
void TEveTrans::Move3LF(Double_t x, Double_t y, Double_t z)
{
fM[F03] += x*fM[0] + y*fM[4] + z*fM[8];
fM[F13] += x*fM[1] + y*fM[5] + z*fM[9];
fM[F23] += x*fM[2] + y*fM[6] + z*fM[10];
}
////////////////////////////////////////////////////////////////////////////////
/// Rotate in local frame. Does optimised version of MultRight.
void TEveTrans::RotateLF(Int_t i1, Int_t i2, Double_t amount)
{
if(i1 == i2) return;
// Algorithm: TEveTrans a; a.SetupRotation(i1, i2, amount); MultRight(a);
// Optimized version:
const Double_t cos = TMath::Cos(amount), sin = TMath::Sin(amount);
Double_t b1, b2;
Double_t* row = fM;
--i1 <<= 2; --i2 <<= 2; // column major
for (int r=0; r<4; ++r, ++row) {
b1 = cos*row[i1] + sin*row[i2];
b2 = cos*row[i2] - sin*row[i1];
row[i1] = b1; row[i2] = b2;
}
fAsOK = kFALSE;
}
////////////////////////////////////////////////////////////////////////////////
/// Move in parent-frame along axis index ai.
void TEveTrans::MovePF(Int_t ai, Double_t amount)
{
fM[F03 + --ai] += amount;
}
////////////////////////////////////////////////////////////////////////////////
/// General move in parent-frame.
void TEveTrans::Move3PF(Double_t x, Double_t y, Double_t z)
{
fM[F03] += x;
fM[F13] += y;
fM[F23] += z;
}
////////////////////////////////////////////////////////////////////////////////
/// Rotate in parent frame. Does optimised version of MultLeft.
void TEveTrans::RotatePF(Int_t i1, Int_t i2, Double_t amount)
{
if(i1 == i2) return;
// Algorithm: TEveTrans a; a.SetupRotation(i1, i2, amount); MultLeft(a);
// Optimized version:
const Double_t cos = TMath::Cos(amount), sin = TMath::Sin(amount);
Double_t b1, b2;
Double_t* col = fM;
--i1; --i2;
for(int c=0; c<4; ++c, col+=4) {
b1 = cos*col[i1] - sin*col[i2];
b2 = cos*col[i2] + sin*col[i1];
col[i1] = b1; col[i2] = b2;
}
fAsOK = kFALSE;
}
////////////////////////////////////////////////////////////////////////////////
/// Move in a's coord-system along axis-index ai.
void TEveTrans::Move(const TEveTrans& a, Int_t ai, Double_t amount)
{
const Double_t* vec = a.fM + 4*--ai;
fM[F03] += amount*vec[0];
fM[F13] += amount*vec[1];
fM[F23] += amount*vec[2];
}
////////////////////////////////////////////////////////////////////////////////
/// General move in a's coord-system.
void TEveTrans::Move3(const TEveTrans& a, Double_t x, Double_t y, Double_t z)
{
const Double_t* m = a.fM;
fM[F03] += x*m[F00] + y*m[F01] + z*m[F02];
fM[F13] += x*m[F10] + y*m[F11] + z*m[F12];
fM[F23] += x*m[F20] + y*m[F21] + z*m[F22];
}
////////////////////////////////////////////////////////////////////////////////
/// Rotate in a's coord-system, rotating base vector with index i1
/// into i2.
void TEveTrans::Rotate(const TEveTrans& a, Int_t i1, Int_t i2, Double_t amount)
{
if(i1 == i2) return;
TEveTrans x(a);
x.Invert();
MultLeft(x);
RotatePF(i1, i2, amount);
MultLeft(a);
fAsOK = kFALSE;
}
////////////////////////////////////////////////////////////////////////////////
/// Set base-vector with index b.
void TEveTrans::SetBaseVec(Int_t b, Double_t x, Double_t y, Double_t z)
{
Double_t* col = fM + 4*--b;
col[0] = x; col[1] = y; col[2] = z;
fAsOK = kFALSE;
}
////////////////////////////////////////////////////////////////////////////////
/// Set base-vector with index b.
void TEveTrans::SetBaseVec(Int_t b, const TVector3& v)
{
Double_t* col = fM + 4*--b;
v.GetXYZ(col);
fAsOK = kFALSE;
}
////////////////////////////////////////////////////////////////////////////////
/// Get base-vector with index b.
TVector3 TEveTrans::GetBaseVec(Int_t b) const
{
return TVector3(&fM[4*--b]);
}
void TEveTrans::GetBaseVec(Int_t b, TVector3& v) const
{
// Get base-vector with index b.
const Double_t* col = fM + 4*--b;
v.SetXYZ(col[0], col[1], col[2]);
}
////////////////////////////////////////////////////////////////////////////////
/// Set position (base-vec 4).
void TEveTrans::SetPos(Double_t x, Double_t y, Double_t z)
{
fM[F03] = x; fM[F13] = y; fM[F23] = z;
}
void TEveTrans::SetPos(Double_t* x)
{
// Set position (base-vec 4).
fM[F03] = x[0]; fM[F13] = x[1]; fM[F23] = x[2];
}
void TEveTrans::SetPos(Float_t* x)
{
// Set position (base-vec 4).
fM[F03] = x[0]; fM[F13] = x[1]; fM[F23] = x[2];
}
void TEveTrans::SetPos(const TEveTrans& t)
{
// Set position (base-vec 4).
const Double_t* m = t.fM;
fM[F03] = m[F03]; fM[F13] = m[F13]; fM[F23] = m[F23];
}
////////////////////////////////////////////////////////////////////////////////
/// Get position (base-vec 4).
void TEveTrans::GetPos(Double_t& x, Double_t& y, Double_t& z) const
{
x = fM[F03]; y = fM[F13]; z = fM[F23];
}
void TEveTrans::GetPos(Double_t* x) const
{
// Get position (base-vec 4).
x[0] = fM[F03]; x[1] = fM[F13]; x[2] = fM[F23];
}
void TEveTrans::GetPos(Float_t* x) const
{
// Get position (base-vec 4).
x[0] = fM[F03]; x[1] = fM[F13]; x[2] = fM[F23];
}
void TEveTrans::GetPos(TVector3& v) const
{
// Get position (base-vec 4).
v.SetXYZ(fM[F03], fM[F13], fM[F23]);
}
TVector3 TEveTrans::GetPos() const
{
// Get position (base-vec 4).
return TVector3(fM[F03], fM[F13], fM[F23]);
}
namespace
{
inline void clamp_angle(Float_t& a)
{
while(a < -TMath::TwoPi()) a += TMath::TwoPi();
while(a > TMath::TwoPi()) a -= TMath::TwoPi();
}
}
void TEveTrans::SetRotByAngles(Float_t a1, Float_t a2, Float_t a3)
{
// Sets Rotation part as given by angles:
// a1 around z, -a2 around y, a3 around x.
clamp_angle(a1); clamp_angle(a2); clamp_angle(a3);
Double_t a, b, c, d, e, f;
a = TMath::Cos(a3); b = TMath::Sin(a3);
c = TMath::Cos(a2); d = TMath::Sin(a2); // should be -sin(a2) for positive direction
e = TMath::Cos(a1); f = TMath::Sin(a1);
Double_t ad = a*d, bd = b*d;
fM[F00] = c*e; fM[F01] = -bd*e - a*f; fM[F02] = -ad*e + b*f;
fM[F10] = c*f; fM[F11] = -bd*f + a*e; fM[F12] = -ad*f - b*e;
fM[F20] = d; fM[F21] = b*c; fM[F22] = a*c;
fA1 = a1; fA2 = a2; fA3 = a3;
fAsOK = kTRUE;
}
////////////////////////////////////////////////////////////////////////////////
/// Sets Rotation part as given by angles a1, a1, a3 and pattern pat.
/// Pattern consists of "XxYyZz" characters.
/// eg: x means rotate about x axis, X means rotate in negative direction
/// xYz -> R_x(a3) * R_y(-a2) * R_z(a1); (standard Gled representation)
/// Note that angles and pattern elements have inverted order!
///
/// Implements Eulerian/Cardanian angles in a uniform way.
void TEveTrans::SetRotByAnyAngles(Float_t a1, Float_t a2, Float_t a3,
const char* pat)
{
int n = strspn(pat, "XxYyZz"); if(n > 3) n = 3;
// Build Trans ... assign ...
Float_t a[] = { a3, a2, a1 };
UnitRot();
for(int i=0; i<n; i++) {
if(isupper(pat[i])) a[i] = -a[i];
switch(pat[i]) {
case 'x': case 'X': RotateLF(2, 3, a[i]); break;
case 'y': case 'Y': RotateLF(3, 1, a[i]); break;
case 'z': case 'Z': RotateLF(1, 2, a[i]); break;
}
}
fAsOK = kFALSE;
}
////////////////////////////////////////////////////////////////////////////////
/// Get Cardan rotation angles (pattern xYz above).
void TEveTrans::GetRotAngles(Float_t* x) const
{
if(!fAsOK) {
Double_t sx, sy, sz;
GetScale(sx, sy, sz);
Double_t d = fM[F20]/sx;
if(d>1) d=1; else if(d<-1) d=-1; // Fix numerical errors
fA2 = TMath::ASin(d);
Double_t cos = TMath::Cos(fA2);
if(TMath::Abs(cos) > 8.7e-6) {
fA1 = TMath::ATan2(fM[F10], fM[F00]);
fA3 = TMath::ATan2(fM[F21]/sy, fM[F22]/sz);
} else {
fA1 = TMath::ATan2(fM[F10]/sx, fM[F11]/sy);
fA3 = 0;
}
fAsOK = kTRUE;
}
x[0] = fA1; x[1] = fA2; x[2] = fA3;
}
////////////////////////////////////////////////////////////////////////////////
/// Scale matrix. Translation part untouched.
void TEveTrans::Scale(Double_t sx, Double_t sy, Double_t sz)
{
fM[F00] *= sx; fM[F10] *= sx; fM[F20] *= sx;
fM[F01] *= sy; fM[F11] *= sy; fM[F21] *= sy;
fM[F02] *= sz; fM[F12] *= sz; fM[F22] *= sz;
}
////////////////////////////////////////////////////////////////////////////////
/// Remove scaling, make all base vectors of unit length.
Double_t TEveTrans::Unscale()
{
Double_t sx, sy, sz;
Unscale(sx, sy, sz);
return (sx + sy + sz)/3;
}
////////////////////////////////////////////////////////////////////////////////
/// Remove scaling, make all base vectors of unit length.
void TEveTrans::Unscale(Double_t& sx, Double_t& sy, Double_t& sz)
{
GetScale(sx, sy, sz);
fM[F00] /= sx; fM[F10] /= sx; fM[F20] /= sx;
fM[F01] /= sy; fM[F11] /= sy; fM[F21] /= sy;
fM[F02] /= sz; fM[F12] /= sz; fM[F22] /= sz;
}
////////////////////////////////////////////////////////////////////////////////
/// Deduce scales from sizes of base vectors.
void TEveTrans::GetScale(Double_t& sx, Double_t& sy, Double_t& sz) const
{
sx = TMath::Sqrt( fM[F00]*fM[F00] + fM[F10]*fM[F10] + fM[F20]*fM[F20] );
sy = TMath::Sqrt( fM[F01]*fM[F01] + fM[F11]*fM[F11] + fM[F21]*fM[F21] );
sz = TMath::Sqrt( fM[F02]*fM[F02] + fM[F12]*fM[F12] + fM[F22]*fM[F22] );
}
////////////////////////////////////////////////////////////////////////////////
/// Set scaling.
void TEveTrans::SetScale(Double_t sx, Double_t sy, Double_t sz)
{
sx /= TMath::Sqrt( fM[F00]*fM[F00] + fM[F10]*fM[F10] + fM[F20]*fM[F20] );
sy /= TMath::Sqrt( fM[F01]*fM[F01] + fM[F11]*fM[F11] + fM[F21]*fM[F21] );
sz /= TMath::Sqrt( fM[F02]*fM[F02] + fM[F12]*fM[F12] + fM[F22]*fM[F22] );
fM[F00] *= sx; fM[F10] *= sx; fM[F20] *= sx;
fM[F01] *= sy; fM[F11] *= sy; fM[F21] *= sy;
fM[F02] *= sz; fM[F12] *= sz; fM[F22] *= sz;
}
////////////////////////////////////////////////////////////////////////////////
/// Change x scaling.
void TEveTrans::SetScaleX(Double_t sx)
{
sx /= TMath::Sqrt( fM[F00]*fM[F00] + fM[F10]*fM[F10] + fM[F20]*fM[F20] );
fM[F00] *= sx; fM[F10] *= sx; fM[F20] *= sx;
}
////////////////////////////////////////////////////////////////////////////////
/// Change y scaling.
void TEveTrans::SetScaleY(Double_t sy)
{
sy /= TMath::Sqrt( fM[F01]*fM[F01] + fM[F11]*fM[F11] + fM[F21]*fM[F21] );
fM[F01] *= sy; fM[F11] *= sy; fM[F21] *= sy;
}
////////////////////////////////////////////////////////////////////////////////
/// Change z scaling.
void TEveTrans::SetScaleZ(Double_t sz)
{
sz /= TMath::Sqrt( fM[F02]*fM[F02] + fM[F12]*fM[F12] + fM[F22]*fM[F22] );
fM[F02] *= sz; fM[F12] *= sz; fM[F22] *= sz;
}
////////////////////////////////////////////////////////////////////////////////
/// Multiply vector in-place.
void TEveTrans::MultiplyIP(TVector3& v, Double_t w) const
{
v.SetXYZ(fM[F00]*v.x() + fM[F01]*v.y() + fM[F02]*v.z() + fM[F03]*w,
fM[F10]*v.x() + fM[F11]*v.y() + fM[F12]*v.z() + fM[F13]*w,
fM[F20]*v.x() + fM[F21]*v.y() + fM[F22]*v.z() + fM[F23]*w);
}
////////////////////////////////////////////////////////////////////////////////
/// Multiply vector in-place.
void TEveTrans::MultiplyIP(Double_t* v, Double_t w) const
{
Double_t r[3] = { v[0], v[1], v[2] };
v[0] = fM[F00]*r[0] + fM[F01]*r[1] + fM[F02]*r[2] + fM[F03]*w;
v[1] = fM[F10]*r[0] + fM[F11]*r[1] + fM[F12]*r[2] + fM[F13]*w;
v[2] = fM[F20]*r[0] + fM[F21]*r[1] + fM[F22]*r[2] + fM[F23]*w;
}
////////////////////////////////////////////////////////////////////////////////
/// Multiply vector in-place.
void TEveTrans::MultiplyIP(Float_t* v, Double_t w) const
{
Double_t r[3] = { v[0], v[1], v[2] };
v[0] = fM[F00]*r[0] + fM[F01]*r[1] + fM[F02]*r[2] + fM[F03]*w;
v[1] = fM[F10]*r[0] + fM[F11]*r[1] + fM[F12]*r[2] + fM[F13]*w;
v[2] = fM[F20]*r[0] + fM[F21]*r[1] + fM[F22]*r[2] + fM[F23]*w;
}
////////////////////////////////////////////////////////////////////////////////
/// Multiply vector and return it.
TVector3 TEveTrans::Multiply(const TVector3& v, Double_t w) const
{
return TVector3(fM[F00]*v.x() + fM[F01]*v.y() + fM[F02]*v.z() + fM[F03]*w,
fM[F10]*v.x() + fM[F11]*v.y() + fM[F12]*v.z() + fM[F13]*w,
fM[F20]*v.x() + fM[F21]*v.y() + fM[F22]*v.z() + fM[F23]*w);
}
////////////////////////////////////////////////////////////////////////////////
/// Multiply vector and fill output array vout.
void TEveTrans::Multiply(const Double_t *vin, Double_t* vout, Double_t w) const
{
vout[0] = fM[F00]*vin[0] + fM[F01]*vin[1] + fM[F02]*vin[2] + fM[F03]*w;
vout[1] = fM[F10]*vin[0] + fM[F11]*vin[1] + fM[F12]*vin[1] + fM[F13]*w;
vout[2] = fM[F20]*vin[0] + fM[F21]*vin[1] + fM[F22]*vin[1] + fM[F23]*w;
}
////////////////////////////////////////////////////////////////////////////////
/// Rotate vector in-place. Translation is NOT applied.
void TEveTrans::RotateIP(TVector3& v) const
{
v.SetXYZ(fM[F00]*v.x() + fM[F01]*v.y() + fM[F02]*v.z(),
fM[F10]*v.x() + fM[F11]*v.y() + fM[F12]*v.z(),
fM[F20]*v.x() + fM[F21]*v.y() + fM[F22]*v.z());
}
////////////////////////////////////////////////////////////////////////////////
/// Rotate vector in-place. Translation is NOT applied.
void TEveTrans::RotateIP(Double_t* v) const
{
Double_t t[3] = { v[0], v[1], v[2] };
v[0] = fM[F00]*t[0] + fM[F01]*t[1] + fM[F02]*t[2];
v[1] = fM[F10]*t[0] + fM[F11]*t[1] + fM[F12]*t[2];
v[2] = fM[F20]*t[0] + fM[F21]*t[1] + fM[F22]*t[2];
}
////////////////////////////////////////////////////////////////////////////////
/// Rotate vector in-place. Translation is NOT applied.
void TEveTrans::RotateIP(Float_t* v) const
{
Double_t t[3] = { v[0], v[1], v[2] };
v[0] = fM[F00]*t[0] + fM[F01]*t[1] + fM[F02]*t[2];
v[1] = fM[F10]*t[0] + fM[F11]*t[1] + fM[F12]*t[2];
v[2] = fM[F20]*t[0] + fM[F21]*t[1] + fM[F22]*t[2];
}
////////////////////////////////////////////////////////////////////////////////
/// Rotate vector and return the rotated vector. Translation is NOT applied.
TVector3 TEveTrans::Rotate(const TVector3& v) const
{
return TVector3(fM[F00]*v.x() + fM[F01]*v.y() + fM[F02]*v.z(),
fM[F10]*v.x() + fM[F11]*v.y() + fM[F12]*v.z(),
fM[F20]*v.x() + fM[F21]*v.y() + fM[F22]*v.z());
}
////////////////////////////////////////////////////////////////////////////////
/// Norm 3-vector in column col.
Double_t TEveTrans::Norm3Column(Int_t col)
{
Double_t* c = fM + 4*--col;
const Double_t l = TMath::Sqrt(c[0]*c[0] + c[1]*c[1] + c[2]*c[2]);
c[0] /= l; c[1] /= l; c[2] /= l;
return l;
}
////////////////////////////////////////////////////////////////////////////////
/// Orto-norm 3-vector in column col with respect to column ref.
Double_t TEveTrans::Orto3Column(Int_t col, Int_t ref)
{
Double_t* c = fM + 4*--col;
Double_t* rc = fM + 4*--ref;
const Double_t dp = c[0]*rc[0] + c[1]*rc[1] + c[2]*rc[2];
c[0] -= rc[0]*dp; c[1] -= rc[1]*dp; c[2] -= rc[2]*dp;
return dp;
}
////////////////////////////////////////////////////////////////////////////////
/// Orto-norm columns 1 to 3.
void TEveTrans::OrtoNorm3()
{
Norm3Column(1);
Orto3Column(2,1); Norm3Column(2);
fM[F02] = fM[F10]*fM[F21] - fM[F11]*fM[F20];
fM[F12] = fM[F20]*fM[F01] - fM[F21]*fM[F00];
fM[F22] = fM[F00]*fM[F11] - fM[F01]*fM[F10];
// Cross-product faster than the following.
// Orto3Column(3,1); Orto3Column(3,2); Norm3Column(3);
}
////////////////////////////////////////////////////////////////////////////////
/// Invert matrix.
/// Copied from ROOT's TMatrixFCramerInv.
Double_t TEveTrans::Invert()
{
static const TEveException eh("TEveTrans::Invert ");
// Find all NECESSARY 2x2 dets: (18 of them)
const Double_t det2_12_01 = fM[F10]*fM[F21] - fM[F11]*fM[F20];
const Double_t det2_12_02 = fM[F10]*fM[F22] - fM[F12]*fM[F20];
const Double_t det2_12_03 = fM[F10]*fM[F23] - fM[F13]*fM[F20];
const Double_t det2_12_13 = fM[F11]*fM[F23] - fM[F13]*fM[F21];
const Double_t det2_12_23 = fM[F12]*fM[F23] - fM[F13]*fM[F22];
const Double_t det2_12_12 = fM[F11]*fM[F22] - fM[F12]*fM[F21];
const Double_t det2_13_01 = fM[F10]*fM[F31] - fM[F11]*fM[F30];
const Double_t det2_13_02 = fM[F10]*fM[F32] - fM[F12]*fM[F30];
const Double_t det2_13_03 = fM[F10]*fM[F33] - fM[F13]*fM[F30];
const Double_t det2_13_12 = fM[F11]*fM[F32] - fM[F12]*fM[F31];
const Double_t det2_13_13 = fM[F11]*fM[F33] - fM[F13]*fM[F31];
const Double_t det2_13_23 = fM[F12]*fM[F33] - fM[F13]*fM[F32];
const Double_t det2_23_01 = fM[F20]*fM[F31] - fM[F21]*fM[F30];
const Double_t det2_23_02 = fM[F20]*fM[F32] - fM[F22]*fM[F30];
const Double_t det2_23_03 = fM[F20]*fM[F33] - fM[F23]*fM[F30];
const Double_t det2_23_12 = fM[F21]*fM[F32] - fM[F22]*fM[F31];
const Double_t det2_23_13 = fM[F21]*fM[F33] - fM[F23]*fM[F31];
const Double_t det2_23_23 = fM[F22]*fM[F33] - fM[F23]*fM[F32];
// Find all NECESSARY 3x3 dets: (16 of them)
const Double_t det3_012_012 = fM[F00]*det2_12_12 - fM[F01]*det2_12_02 + fM[F02]*det2_12_01;
const Double_t det3_012_013 = fM[F00]*det2_12_13 - fM[F01]*det2_12_03 + fM[F03]*det2_12_01;
const Double_t det3_012_023 = fM[F00]*det2_12_23 - fM[F02]*det2_12_03 + fM[F03]*det2_12_02;
const Double_t det3_012_123 = fM[F01]*det2_12_23 - fM[F02]*det2_12_13 + fM[F03]*det2_12_12;
const Double_t det3_013_012 = fM[F00]*det2_13_12 - fM[F01]*det2_13_02 + fM[F02]*det2_13_01;
const Double_t det3_013_013 = fM[F00]*det2_13_13 - fM[F01]*det2_13_03 + fM[F03]*det2_13_01;
const Double_t det3_013_023 = fM[F00]*det2_13_23 - fM[F02]*det2_13_03 + fM[F03]*det2_13_02;
const Double_t det3_013_123 = fM[F01]*det2_13_23 - fM[F02]*det2_13_13 + fM[F03]*det2_13_12;
const Double_t det3_023_012 = fM[F00]*det2_23_12 - fM[F01]*det2_23_02 + fM[F02]*det2_23_01;
const Double_t det3_023_013 = fM[F00]*det2_23_13 - fM[F01]*det2_23_03 + fM[F03]*det2_23_01;
const Double_t det3_023_023 = fM[F00]*det2_23_23 - fM[F02]*det2_23_03 + fM[F03]*det2_23_02;
const Double_t det3_023_123 = fM[F01]*det2_23_23 - fM[F02]*det2_23_13 + fM[F03]*det2_23_12;
const Double_t det3_123_012 = fM[F10]*det2_23_12 - fM[F11]*det2_23_02 + fM[F12]*det2_23_01;
const Double_t det3_123_013 = fM[F10]*det2_23_13 - fM[F11]*det2_23_03 + fM[F13]*det2_23_01;
const Double_t det3_123_023 = fM[F10]*det2_23_23 - fM[F12]*det2_23_03 + fM[F13]*det2_23_02;
const Double_t det3_123_123 = fM[F11]*det2_23_23 - fM[F12]*det2_23_13 + fM[F13]*det2_23_12;
// Find the 4x4 det:
const Double_t det = fM[F00]*det3_123_123 - fM[F01]*det3_123_023 +
fM[F02]*det3_123_013 - fM[F03]*det3_123_012;
if(det == 0) {
throw(eh + "matrix is singular.");
}
const Double_t oneOverDet = 1.0/det;
const Double_t mn1OverDet = - oneOverDet;
fM[F00] = det3_123_123 * oneOverDet;
fM[F01] = det3_023_123 * mn1OverDet;
fM[F02] = det3_013_123 * oneOverDet;
fM[F03] = det3_012_123 * mn1OverDet;
fM[F10] = det3_123_023 * mn1OverDet;
fM[F11] = det3_023_023 * oneOverDet;
fM[F12] = det3_013_023 * mn1OverDet;
fM[F13] = det3_012_023 * oneOverDet;
fM[F20] = det3_123_013 * oneOverDet;
fM[F21] = det3_023_013 * mn1OverDet;
fM[F22] = det3_013_013 * oneOverDet;
fM[F23] = det3_012_013 * mn1OverDet;
fM[F30] = det3_123_012 * mn1OverDet;
fM[F31] = det3_023_012 * oneOverDet;
fM[F32] = det3_013_012 * mn1OverDet;
fM[F33] = det3_012_012 * oneOverDet;
fAsOK = kFALSE;
return det;
}
////////////////////////////////////////////////////////////////////////////////
/// Stream an object of class TEveTrans.
void TEveTrans::Streamer(TBuffer &R__b)
{
if (R__b.IsReading()) {
TEveTrans::Class()->ReadBuffer(R__b, this);
fAsOK = kFALSE;
} else {
TEveTrans::Class()->WriteBuffer(R__b, this);
}
}
////////////////////////////////////////////////////////////////////////////////
/// Print in reasonable format.
void TEveTrans::Print(Option_t* /*option*/) const
{
const Double_t* row = fM;
for(Int_t i=0; i<4; ++i, ++row)
printf("%8.3f %8.3f %8.3f | %8.3f\n", row[0], row[4], row[8], row[12]);
}
#include <iomanip>
////////////////////////////////////////////////////////////////////////////////
/// Print to std::ostream.
std::ostream& operator<<(std::ostream& s, const TEveTrans& t)
{
s.setf(std::ios::fixed, std::ios::floatfield);
s.precision(3);
for(Int_t i=1; i<=4; i++)
for(Int_t j=1; j<=4; j++)
s << t(i,j) << ((j==4) ? "\n" : "\t");
return s;
}
#include "TGeoMatrix.h"
#include "TBuffer3D.h"
void TEveTrans::SetFrom(Double_t* carr)
{
// Initialize from array.
fUseTrans = kTRUE;
memcpy(fM, carr, 16*sizeof(Double_t));
fAsOK = kFALSE;
}
////////////////////////////////////////////////////////////////////////////////
/// Initialize from TGeoMatrix.
void TEveTrans::SetFrom(const TGeoMatrix& mat)
{
fUseTrans = kTRUE;
const Double_t *r = mat.GetRotationMatrix();
const Double_t *t = mat.GetTranslation();
Double_t *m = fM;
if (mat.IsScale())
{
const Double_t *s = mat.GetScale();