// @(#)root/geom:$Name: $:$Id: TGeoTube.cxx,v 1.63 2005/05/25 14:25:16 brun Exp $
// Author: Andrei Gheata 24/10/01
// TGeoTube::Contains() and DistFromInside/In() implemented by Mihaela Gheata
/*************************************************************************
* Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
* All rights reserved. *
* *
* For the licensing terms see $ROOTSYS/LICENSE. *
* For the list of contributors see $ROOTSYS/README/CREDITS. *
*************************************************************************/
//_____________________________________________________________________________
// TGeoTube - cylindrical tube class. It takes 3 parameters :
// inner radius, outer radius and half-length dz.
//
//_____________________________________________________________________________
//
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//_____________________________________________________________________________
// TGeoTubeSeg - a phi segment of a tube. Has 5 parameters :
// - the same 3 as a tube;
// - first phi limit (in degrees)
// - second phi limit
//
//_____________________________________________________________________________
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// TGeoCtub - a tube segment cut with 2 planes. Has 11 parameters :
// - the same 5 as a tube segment;
// - x, y, z components of the normal to the -dZ cut plane in
// point (0, 0, -dZ);
// - x, y, z components of the normal to the +dZ cut plane in
// point (0, 0, dZ);
//
//_____________________________________________________________________________
//
/*
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//
#include "Riostream.h"
#include "TROOT.h"
#include "TGeoManager.h"
#include "TGeoVolume.h"
#include "TVirtualGeoPainter.h"
#include "TGeoTube.h"
#include "TVirtualPad.h"
#include "TBuffer3D.h"
#include "TBuffer3DTypes.h"
ClassImp(TGeoTube)
//_____________________________________________________________________________
TGeoTube::TGeoTube()
{
// Default constructor
SetShapeBit(TGeoShape::kGeoTube);
fRmin = 0.0;
fRmax = 0.0;
fDz = 0.0;
}
//_____________________________________________________________________________
TGeoTube::TGeoTube(Double_t rmin, Double_t rmax, Double_t dz)
:TGeoBBox(0, 0, 0)
{
// Default constructor specifying minimum and maximum radius
SetShapeBit(TGeoShape::kGeoTube);
SetTubeDimensions(rmin, rmax, dz);
if ((fDz<0) || (fRmin<0) || (fRmax<0)) {
SetShapeBit(kGeoRunTimeShape);
// if (fRmax<=fRmin) SetShapeBit(kGeoInvalidShape);
// printf("tube : dz=%f rmin=%f rmax=%f\n", dz, rmin, rmax);
}
ComputeBBox();
}
//_____________________________________________________________________________
TGeoTube::TGeoTube(const char *name, Double_t rmin, Double_t rmax, Double_t dz)
:TGeoBBox(name, 0, 0, 0)
{
// Default constructor specifying minimum and maximum radius
SetShapeBit(TGeoShape::kGeoTube);
SetTubeDimensions(rmin, rmax, dz);
if ((fDz<0) || (fRmin<0) || (fRmax<0)) {
SetShapeBit(kGeoRunTimeShape);
// if (fRmax<=fRmin) SetShapeBit(kGeoInvalidShape);
// printf("tube : dz=%f rmin=%f rmax=%f\n", dz, rmin, rmax);
}
ComputeBBox();
}
//_____________________________________________________________________________
TGeoTube::TGeoTube(Double_t *param)
:TGeoBBox(0, 0, 0)
{
// Default constructor specifying minimum and maximum radius
// param[0] = Rmin
// param[1] = Rmax
// param[2] = dz
SetShapeBit(TGeoShape::kGeoTube);
SetDimensions(param);
if ((fDz<0) || (fRmin<0) || (fRmax<0)) SetShapeBit(kGeoRunTimeShape);
ComputeBBox();
}
//_____________________________________________________________________________
TGeoTube::~TGeoTube()
{
// destructor
}
//_____________________________________________________________________________
void TGeoTube::ComputeBBox()
{
// compute bounding box of the tube
fDX = fDY = fRmax;
fDZ = fDz;
}
//_____________________________________________________________________________
void TGeoTube::ComputeNormal(Double_t *point, Double_t *dir, Double_t *norm)
{
// Compute normal to closest surface from POINT.
Double_t saf[3];
Double_t rsq = point[0]*point[0]+point[1]*point[1];
Double_t r = TMath::Sqrt(rsq);
saf[0] = TMath::Abs(fDz-TMath::Abs(point[2]));
saf[1] = (fRmin>1E-10)?TMath::Abs(r-fRmin):TGeoShape::Big();
saf[2] = TMath::Abs(fRmax-r);
Int_t i = TMath::LocMin(3,saf);
if (i==0) {
norm[0] = norm[1] = 0.;
norm[2] = TMath::Sign(1.,dir[2]);
return;
}
norm[2] = 0;
Double_t phi = TMath::ATan2(point[1], point[0]);
norm[0] = TMath::Cos(phi);
norm[1] = TMath::Sin(phi);
if (norm[0]*dir[0]+norm[1]*dir[1]<0) {
norm[0] = -norm[0];
norm[1] = -norm[1];
}
}
//_____________________________________________________________________________
void TGeoTube::ComputeNormalS(Double_t *point, Double_t *dir, Double_t *norm,
Double_t /*rmin*/, Double_t /*rmax*/, Double_t /*dz*/)
{
// Compute normal to closest surface from POINT.
norm[2] = 0;
Double_t phi = TMath::ATan2(point[1], point[0]);
norm[0] = TMath::Cos(phi);
norm[1] = TMath::Sin(phi);
if (norm[0]*dir[0]+norm[1]*dir[1]<0) {
norm[0] = -norm[0];
norm[1] = -norm[1];
}
}
//_____________________________________________________________________________
Bool_t TGeoTube::Contains(Double_t *point) const
{
// test if point is inside this tube
if (TMath::Abs(point[2]) > fDz) return kFALSE;
Double_t r2 = point[0]*point[0]+point[1]*point[1];
if ((r2<fRmin*fRmin) || (r2>fRmax*fRmax)) return kFALSE;
return kTRUE;
}
//_____________________________________________________________________________
Int_t TGeoTube::DistancetoPrimitive(Int_t px, Int_t py)
{
// compute closest distance from point px,py to each corner
Int_t n = gGeoManager->GetNsegments();
Int_t numPoints = 4*n;
if (!HasRmin()) numPoints = 2*(n+1);
return ShapeDistancetoPrimitive(numPoints, px, py);
}
//_____________________________________________________________________________
Double_t TGeoTube::DistFromInsideS(Double_t *point, Double_t *dir, Double_t rmin, Double_t rmax, Double_t dz)
{
// Compute distance from inside point to surface of the tube (static)
// Boundary safe algorithm.
// compute distance to surface
// Do Z
Double_t sz = TGeoShape::Big();
if (dir[2]) {
sz = (TMath::Sign(dz, dir[2])-point[2])/dir[2];
if (sz<=0) return 0.0;
}
// Do R
Double_t nsq=dir[0]*dir[0]+dir[1]*dir[1];
if (TMath::Abs(nsq)<TGeoShape::Tolerance()) return sz;
Double_t rsq=point[0]*point[0]+point[1]*point[1];
Double_t rdotn=point[0]*dir[0]+point[1]*dir[1];
Double_t b,d;
Double_t sr = TGeoShape::Big();
// inner cylinder
if (rmin>0) {
// Protection in case point is actually outside the tube
if (rsq <= rmin*rmin+TGeoShape::Tolerance()) {
if (rdotn<0) return 0.0;
} else {
if (rdotn<0) {
DistToTube(rsq,nsq,rdotn,rmin,b,d);
if (d>0) {
sr=-b-d;
if (sr>0) return TMath::Min(sz,sr);
}
}
}
}
// outer cylinder
if (rsq >= rmax*rmax-TGeoShape::Tolerance()) {
if (rdotn>=0) return 0.0;
}
DistToTube(rsq,nsq,rdotn,rmax,b,d);
if (d>0) {
sr=-b+d;
if (sr>0) return TMath::Min(sz,sr);
}
return 0.;
}
//_____________________________________________________________________________
Double_t TGeoTube::DistFromInside(Double_t *point, Double_t *dir, Int_t iact, Double_t step, Double_t *safe) const
{
// Compute distance from inside point to surface of the tube
// Boundary safe algorithm.
if (iact<3 && safe) {
*safe = Safety(point, kTRUE);
if (iact==0) return TGeoShape::Big();
if ((iact==1) && (*safe>step)) return TGeoShape::Big();
}
// compute distance to surface
return DistFromInsideS(point, dir, fRmin, fRmax, fDz);
}
//_____________________________________________________________________________
Double_t TGeoTube::DistFromOutsideS(Double_t *point, Double_t *dir, Double_t rmin, Double_t rmax, Double_t dz)
{
// Static method to compute distance from outside point to a tube with given parameters
// Boundary safe algorithm.
// check Z planes
Double_t xi,yi,zi;
Double_t rmaxsq = rmax*rmax;
Double_t rminsq = rmin*rmin;
zi = dz - TMath::Abs(point[2]);
Double_t s = TGeoShape::Big();
Bool_t in = kFALSE;
Bool_t inz = (zi<0)?kFALSE:kTRUE;
if (!inz) {
if (point[2]*dir[2]>=0) return TGeoShape::Big();
s = -zi/TMath::Abs(dir[2]);
xi = point[0]+s*dir[0];
yi = point[1]+s*dir[1];
Double_t r2=xi*xi+yi*yi;
if ((rminsq<=r2) && (r2<=rmaxsq)) return s;
}
Double_t rsq = point[0]*point[0]+point[1]*point[1];
// check outer cyl. surface
Double_t nsq=dir[0]*dir[0]+dir[1]*dir[1];
Double_t rdotn=point[0]*dir[0]+point[1]*dir[1];
Double_t b,d;
Bool_t inrmax = kFALSE;
Bool_t inrmin = kFALSE;
if (rsq<=rmaxsq+TGeoShape::Tolerance()) inrmax = kTRUE;
if (rsq>=rminsq-TGeoShape::Tolerance()) inrmin = kTRUE;
in = inz & inrmin & inrmax;
// If inside, we are most likely on a boundary within machine precision.
if (in) {
Bool_t checkout = kFALSE;
Double_t r = TMath::Sqrt(rsq);
if (zi<rmax-r) {
if ((rmin==0) || (zi<r-rmin)) {
if (point[2]*dir[2]<0) return 0.0;
return TGeoShape::Big();
}
}
if ((rmaxsq-rsq) < (rsq-rminsq)) checkout = kTRUE;
if (checkout) {
if (rdotn>=0) return TGeoShape::Big();
return 0.0;
}
if (rmin==0) return 0.0;
if (rdotn>=0) return 0.0;
// Ray exiting rmin -> check (+) solution for inner tube
if (TMath::Abs(nsq)<TGeoShape::Tolerance()) return TGeoShape::Big();
DistToTube(rsq, nsq, rdotn, rmin, b, d);
if (d>0) {
s=-b+d;
if (s>0) {
zi=point[2]+s*dir[2];
if (TMath::Abs(zi)<=dz) return s;
}
}
return TGeoShape::Big();
}
// Check outer cylinder (only r>rmax has to be considered)
if (TMath::Abs(nsq)<TGeoShape::Tolerance()) return TGeoShape::Big();
if (!inrmax) {
DistToTube(rsq, nsq, rdotn, rmax, b, d);
if (d>0) {
s=-b-d;
if (s>0) {
zi=point[2]+s*dir[2];
if (TMath::Abs(zi)<=dz) return s;
}
}
}
// check inner cylinder
if (rmin>0) {
DistToTube(rsq, nsq, rdotn, rmin, b, d);
if (d>0) {
s=-b+d;
if (s>0) {
zi=point[2]+s*dir[2];
if (TMath::Abs(zi)<=dz) return s;
}
}
}
return TGeoShape::Big();
}
//_____________________________________________________________________________
Double_t TGeoTube::DistFromOutside(Double_t *point, Double_t *dir, Int_t iact, Double_t step, Double_t *safe) const
{
// Compute distance from outside point to surface of the tube and safe distance
// Boundary safe algorithm.
// fist localize point w.r.t tube
if (iact<3 && safe) {
*safe = Safety(point, kFALSE);
if (iact==0) return TGeoShape::Big();
if ((iact==1) && (step<=*safe)) return TGeoShape::Big();
}
// find distance to shape
return DistFromOutsideS(point, dir, fRmin, fRmax, fDz);
}
//_____________________________________________________________________________
void TGeoTube::DistToTube(Double_t rsq, Double_t nsq, Double_t rdotn, Double_t radius, Double_t &b, Double_t &delta)
{
// Static method computing the distance to a tube with given radius, starting from
// POINT along DIR director cosines. The distance is computed as :
// RSQ = point[0]*point[0]+point[1]*point[1]
// NSQ = dir[0]*dir[0]+dir[1]*dir[1] ---> should NOT be 0 !!!
// RDOTN = point[0]*dir[0]+point[1]*dir[1]
// The distance can be computed as :
// D = -B +/- DELTA
// where DELTA.GT.0 and D.GT.0
Double_t t1 = 1./nsq;
Double_t t3=rsq-(radius*radius);
b = t1*rdotn;
Double_t c =t1*t3;
delta = b*b-c;
if (delta>0) {
delta=TMath::Sqrt(delta);
} else {
delta = -1;
}
}
//_____________________________________________________________________________
TGeoVolume *TGeoTube::Divide(TGeoVolume *voldiv, const char *divname, Int_t iaxis, Int_t ndiv,
Double_t start, Double_t step)
{
//--- Divide this tube shape belonging to volume "voldiv" into ndiv volumes
// called divname, from start position with the given step. Returns pointer
// to created division cell volume in case of Z divisions. For radial division
// creates all volumes with different shapes and returns pointer to volume that
// was divided. In case a wrong division axis is supplied, returns pointer to
// volume that was divided.
TGeoShape *shape; //--- shape to be created
TGeoVolume *vol; //--- division volume to be created
TGeoVolumeMulti *vmulti; //--- generic divided volume
TGeoPatternFinder *finder; //--- finder to be attached
TString opt = ""; //--- option to be attached
Int_t id;
Double_t end = start+ndiv*step;
switch (iaxis) {
case 1: //--- R division
finder = new TGeoPatternCylR(voldiv, ndiv, start, end);
vmulti = gGeoManager->MakeVolumeMulti(divname, voldiv->GetMedium());
voldiv->SetFinder(finder);
finder->SetDivIndex(voldiv->GetNdaughters());
for (id=0; id<ndiv; id++) {
shape = new TGeoTube(start+id*step, start+(id+1)*step, fDz);
vol = new TGeoVolume(divname, shape, voldiv->GetMedium());
vmulti->AddVolume(vol);
opt = "R";
voldiv->AddNodeOffset(vol, id, 0, opt.Data());
((TGeoNodeOffset*)voldiv->GetNodes()->At(voldiv->GetNdaughters()-1))->SetFinder(finder);
}
return vmulti;
case 2: //--- Phi division
finder = new TGeoPatternCylPhi(voldiv, ndiv, start, end);
voldiv->SetFinder(finder);
finder->SetDivIndex(voldiv->GetNdaughters());
shape = new TGeoTubeSeg(fRmin, fRmax, fDz, -step/2, step/2);
vol = new TGeoVolume(divname, shape, voldiv->GetMedium());
vmulti = gGeoManager->MakeVolumeMulti(divname, voldiv->GetMedium());
vmulti->AddVolume(vol);
opt = "Phi";
for (id=0; id<ndiv; id++) {
voldiv->AddNodeOffset(vol, id, start+id*step+step/2, opt.Data());
((TGeoNodeOffset*)voldiv->GetNodes()->At(voldiv->GetNdaughters()-1))->SetFinder(finder);
}
return vmulti;
case 3: //--- Z division
finder = new TGeoPatternZ(voldiv, ndiv, start, start+ndiv*step);
voldiv->SetFinder(finder);
finder->SetDivIndex(voldiv->GetNdaughters());
shape = new TGeoTube(fRmin, fRmax, step/2);
vol = new TGeoVolume(divname, shape, voldiv->GetMedium());
vmulti = gGeoManager->MakeVolumeMulti(divname, voldiv->GetMedium());
vmulti->AddVolume(vol);
opt = "Z";
for (id=0; id<ndiv; id++) {
voldiv->AddNodeOffset(vol, id, start+step/2+id*step, opt.Data());
((TGeoNodeOffset*)voldiv->GetNodes()->At(voldiv->GetNdaughters()-1))->SetFinder(finder);
}
return vmulti;
default:
Error("Divide", "In shape %s wrong axis type for division", GetName());
return 0;
}
}
//_____________________________________________________________________________
const char *TGeoTube::GetAxisName(Int_t iaxis) const
{
// Returns name of axis IAXIS.
switch (iaxis) {
case 1:
return "R";
case 2:
return "PHI";
case 3:
return "Z";
default:
return "UNDEFINED";
}
}
//_____________________________________________________________________________
Double_t TGeoTube::GetAxisRange(Int_t iaxis, Double_t &xlo, Double_t &xhi) const
{
// Get range of shape for a given axis.
xlo = 0;
xhi = 0;
Double_t dx = 0;
switch (iaxis) {
case 1:
xlo = fRmin;
xhi = fRmax;
dx = xhi-xlo;
return dx;
case 2:
xlo = 0;
xhi = 360;
dx = 360;
return dx;
case 3:
xlo = -fDz;
xhi = fDz;
dx = xhi-xlo;
return dx;
}
return dx;
}
//_____________________________________________________________________________
void TGeoTube::GetBoundingCylinder(Double_t *param) const
{
//--- Fill vector param[4] with the bounding cylinder parameters. The order
// is the following : Rmin, Rmax, Phi1, Phi2, dZ
param[0] = fRmin; // Rmin
param[0] *= param[0];
param[1] = fRmax; // Rmax
param[1] *= param[1];
param[2] = 0.; // Phi1
param[3] = 360.; // Phi1
}
//_____________________________________________________________________________
TGeoShape *TGeoTube::GetMakeRuntimeShape(TGeoShape *mother, TGeoMatrix * /*mat*/) const
{
// in case shape has some negative parameters, these has to be computed
// in order to fit the mother
if (!TestShapeBit(kGeoRunTimeShape)) return 0;
Double_t rmin, rmax, dz;
Double_t xmin,xmax;
rmin = fRmin;
rmax = fRmax;
dz = fDz;
if (fDz<0) {
mother->GetAxisRange(3,xmin,xmax);
if (xmax<0) return 0;
dz=xmax;
}
mother->GetAxisRange(1,xmin,xmax);
if (fRmin<0) {
if (xmin<0) return 0;
rmin = xmin;
}
if (fRmax<0) {
if (xmax<=0) return 0;
rmax = xmax;
}
return (new TGeoTube(GetName(), rmin, rmax, dz));
}
//_____________________________________________________________________________
void TGeoTube::InspectShape() const
{
// print shape parameters
printf("*** Shape %s: TGeoTube ***\n", GetName());
printf(" Rmin = %11.5f\n", fRmin);
printf(" Rmax = %11.5f\n", fRmax);
printf(" dz = %11.5f\n", fDz);
printf(" Bounding box:\n");
TGeoBBox::InspectShape();
}
//_____________________________________________________________________________
TBuffer3D *TGeoTube::MakeBuffer3D() const
{
// Creates a TBuffer3D describing *this* shape.
// Coordinates are in local reference frame.
Int_t n = gGeoManager->GetNsegments();
Int_t NbPnts = 4*n;
Int_t NbSegs = 8*n;
Int_t NbPols = 4*n;
TBuffer3D* buff = new TBuffer3D(TBuffer3DTypes::kGeneric,
NbPnts, 3*NbPnts, NbSegs, 3*NbSegs, NbPols, 6*NbPols);
if (buff)
{
SetPoints(buff->fPnts);
SetSegsAndPols(*buff);
}
return buff;
}
//_____________________________________________________________________________
void TGeoTube::SetSegsAndPols(TBuffer3D &buffer) const
{
// Fill TBuffer3D structure for segments and polygons.
Int_t i, j,indx;
Int_t n = gGeoManager->GetNsegments();
Int_t c = (((buffer.fColor) %8) -1) * 4;
if (c < 0) c = 0;
if (HasRmin()) {
// circle segments:
// lower rmin circle: i=0, (0, n-1)
// lower rmax circle: i=1, (n, 2n-1)
// upper rmin circle: i=2, (2n, 3n-1)
// upper rmax circle: i=1, (3n, 4n-1)
for (i = 0; i < 4; i++) {
for (j = 0; j < n; j++) {
indx = 3*(i*n+j);
buffer.fSegs[indx ] = c;
buffer.fSegs[indx+1] = i*n+j;
buffer.fSegs[indx+2] = i*n+(j+1)%n;
}
}
// Z-parallel segments
// inner: i=4, (4n, 5n-1)
// outer: i=5, (5n, 6n-1)
for (i = 4; i < 6; i++) {
for (j = 0; j < n; j++) {
indx = 3*(i*n+j);
buffer.fSegs[indx ] = c+1;
buffer.fSegs[indx+1] = (i-4)*n+j;
buffer.fSegs[indx+2] = (i-2)*n+j;
}
}
// Radial segments
// lower: i=6, (6n, 7n-1)
// upper: i=7, (7n, 8n-1)
for (i = 6; i < 8; i++) {
for (j = 0; j < n; j++) {
indx = 3*(i*n+j);
buffer.fSegs[indx ] = c;
buffer.fSegs[indx+1] = 2*(i-6)*n+j;
buffer.fSegs[indx+2] = (2*(i-6)+1)*n+j;
}
}
// Polygons
i=0;
// Inner lateral (0, n-1)
for (j = 0; j < n; j++) {
indx = 6*(i*n+j);
buffer.fPols[indx ] = c;
buffer.fPols[indx+1] = 4;
buffer.fPols[indx+2] = j;
buffer.fPols[indx+3] = 4*n+(j+1)%n;
buffer.fPols[indx+4] = 2*n+j;
buffer.fPols[indx+5] = 4*n+j;
}
i=1;
// Outer lateral (n,2n-1)
for (j = 0; j < n; j++) {
indx = 6*(i*n+j);
buffer.fPols[indx ] = c+1;
buffer.fPols[indx+1] = 4;
buffer.fPols[indx+2] = n+j;
buffer.fPols[indx+3] = 5*n+j;
buffer.fPols[indx+4] = 3*n+j;
buffer.fPols[indx+5] = 5*n+(j+1)%n;
}
i=2;
// lower disc (2n, 3n-1)
for (j = 0; j < n; j++) {
indx = 6*(i*n+j);
buffer.fPols[indx ] = c;
buffer.fPols[indx+1] = 4;
buffer.fPols[indx+2] = j;
buffer.fPols[indx+3] = 6*n+j;
buffer.fPols[indx+4] = n+j;
buffer.fPols[indx+5] = 6*n+(j+1)%n;
}
i=3;
// upper disc (3n, 4n-1)
for (j = 0; j < n; j++) {
indx = 6*(i*n+j);
buffer.fPols[indx ] = c;
buffer.fPols[indx+1] = 4;
buffer.fPols[indx+2] = 2*n+j;
buffer.fPols[indx+3] = 7*n+(j+1)%n;
buffer.fPols[indx+4] = 3*n+j;
buffer.fPols[indx+5] = 7*n+j;
}
return;
}
// Rmin=0 tubes
// circle segments
// lower rmax circle: i=0, (0, n-1)
// upper rmax circle: i=1, (n, 2n-1)
for (i = 0; i < 2; i++) {
for (j = 0; j < n; j++) {
indx = 3*(i*n+j);
buffer.fSegs[indx ] = c;
buffer.fSegs[indx+1] = 2+i*n+j;
buffer.fSegs[indx+2] = 2+i*n+(j+1)%n;
}
}
// Z-parallel segments (2n,3n-1)
for (j = 0; j < n; j++) {
indx = 3*(2*n+j);
buffer.fSegs[indx ] = c+1;
buffer.fSegs[indx+1] = 2+j;
buffer.fSegs[indx+2] = 2+n+j;
}
// Radial segments
// Lower circle: i=3, (3n,4n-1)
// Upper circle: i=4, (4n,5n-1)
for (i = 3; i < 5; i++) {
for (j = 0; j < n; j++) {
indx = 3*(i*n+j);
buffer.fSegs[indx ] = c;
buffer.fSegs[indx+1] = i-3;
buffer.fSegs[indx+2] = 2+(i-3)*n+j;
}
}
// Polygons
// lateral (0,n-1)
for (j = 0; j < n; j++) {
indx = 6*j;
buffer.fPols[indx ] = c+1;
buffer.fPols[indx+1] = 4;
buffer.fPols[indx+2] = j;
buffer.fPols[indx+3] = 2*n+j;
buffer.fPols[indx+4] = n+j;
buffer.fPols[indx+5] = 2*n+(j+1)%n;
}
// bottom triangles (n,2n-1)
for (j = 0; j < n; j++) {
indx = 6*n + 5*j;
buffer.fPols[indx ] = c;
buffer.fPols[indx+1] = 3;
buffer.fPols[indx+2] = j;
buffer.fPols[indx+3] = 3*n+(j+1)%n;
buffer.fPols[indx+4] = 3*n+j;
}
// top triangles (2n,3n-1)
for (j = 0; j < n; j++) {
indx = 6*n + 5*n + 5*j;
buffer.fPols[indx ] = c;
buffer.fPols[indx+1] = 3;
buffer.fPols[indx+2] = n+j;
buffer.fPols[indx+3] = 4*n+j;
buffer.fPols[indx+4] = 4*n+(j+1)%n;
}
}
//_____________________________________________________________________________
Double_t TGeoTube::Safety(Double_t *point, Bool_t in) const
{
// computes the closest distance from given point to this shape, according
// to option. The matching point on the shape is stored in spoint.
#ifndef NEVER
Double_t r = TMath::Sqrt(point[0]*point[0]+point[1]*point[1]);
Double_t safe, safrmin, safrmax;
if (in) {
safe = fDz-TMath::Abs(point[2]); // positive if inside
if (fRmin>1E-10) {
safrmin = r-fRmin;
if (safrmin < safe) safe = safrmin;
}
safrmax = fRmax-r;
if (safrmax < safe) safe = safrmax;
} else {
safe = -fDz+TMath::Abs(point[2]);
if (fRmin>1E-10) {
safrmin = -r+fRmin;
if (safrmin > safe) safe = safrmin;
}
safrmax = -fRmax+r;
if (safrmax > safe) safe = safrmax;
}
return safe;
#else
Double_t saf[3];
Double_t rsq = point[0]*point[0]+point[1]*point[1];
Double_t r = TMath::Sqrt(rsq);
saf[0] = fDz-TMath::Abs(point[2]); // positive if inside
saf[1] = (fRmin>1E-10)?(r-fRmin):TGeoShape::Big();
saf[2] = fRmax-r;
if (in) return saf[TMath::LocMin(3,saf)];
for (Int_t i=0; i<3; i++) saf[i]=-saf[i];
return saf[TMath::LocMax(3,saf)];
#endif
}
//_____________________________________________________________________________
Double_t TGeoTube::SafetyS(Double_t *point, Bool_t in, Double_t rmin, Double_t rmax, Double_t dz, Int_t skipz)
{
// computes the closest distance from given point to this shape, according
// to option. The matching point on the shape is stored in spoint.
Double_t saf[3];
Double_t rsq = point[0]*point[0]+point[1]*point[1];
Double_t r = TMath::Sqrt(rsq);
switch (skipz) {
case 1: // skip lower Z plane
saf[0] = dz - point[2];
break;
case 2: // skip upper Z plane
saf[0] = dz + point[2];
break;
case 3: // skip both
saf[0] = TGeoShape::Big();
break;
default:
saf[0] = dz-TMath::Abs(point[2]);
}
saf[1] = (rmin>1E-10)?(r-rmin):TGeoShape::Big();
saf[2] = rmax-r;
// printf("saf0=%g saf1=%g saf2=%g in=%d skipz=%d\n", saf[0],saf[1],saf[2],in,skipz);
if (in) return saf[TMath::LocMin(3,saf)];
for (Int_t i=0; i<3; i++) saf[i]=-saf[i];
return saf[TMath::LocMax(3,saf)];
}
//_____________________________________________________________________________
void TGeoTube::SavePrimitive(ofstream &out, Option_t * /*option*/)
{
// Save a primitive as a C++ statement(s) on output stream "out".
if (TObject::TestBit(kGeoSavePrimitive)) return;
out << " // Shape: " << GetName() << " type: " << ClassName() << endl;
out << " rmin = " << fRmin << ";" << endl;
out << " rmax = " << fRmax << ";" << endl;
out << " dz = " << fDz << ";" << endl;
out << " TGeoShape *" << GetPointerName() << " = new TGeoTube(\"" << GetName() << "\",rmin,rmax,dz);" << endl;
TObject::SetBit(TGeoShape::kGeoSavePrimitive);
}
//_____________________________________________________________________________
void TGeoTube::SetTubeDimensions(Double_t rmin, Double_t rmax, Double_t dz)
{
fRmin = rmin;
fRmax = rmax;
fDz = dz;
if (fRmin>0 && fRmax>0 && fRmin>=fRmax)
Error("SetTubeDimensions", "In shape %s wrong rmin=%g rmax=%g", GetName(), rmin,rmax);
}
//_____________________________________________________________________________
void TGeoTube::SetDimensions(Double_t *param)
{
Double_t rmin = param[0];
Double_t rmax = param[1];
Double_t dz = param[2];
SetTubeDimensions(rmin, rmax, dz);
}
//_____________________________________________________________________________
void TGeoTube::SetPoints(Double_t *points) const
{
// create tube mesh points
Double_t dz;
Int_t j, n;
n = gGeoManager->GetNsegments();
Double_t dphi = 360./n;
Double_t phi = 0;
dz = fDz;
Int_t indx = 0;
if (points) {
if (HasRmin()) {
// 4*n points
// (0,n-1) lower rmin circle
// (2n, 3n-1) upper rmin circle
for (j = 0; j < n; j++) {
phi = j*dphi*TMath::DegToRad();
points[indx+6*n] = points[indx] = fRmin * TMath::Cos(phi);
indx++;
points[indx+6*n] = points[indx] = fRmin * TMath::Sin(phi);
indx++;
points[indx+6*n] = dz;
points[indx] =-dz;
indx++;
}
// (n, 2n-1) lower rmax circle
// (3n, 4n-1) upper rmax circle
for (j = 0; j < n; j++) {
phi = j*dphi*TMath::DegToRad();
points[indx+6*n] = points[indx] = fRmax * TMath::Cos(phi);
indx++;
points[indx+6*n] = points[indx] = fRmax * TMath::Sin(phi);
indx++;
points[indx+6*n]= dz;
points[indx] =-dz;
indx++;
}
} else {
// centers of lower/upper circles (0,1)
points[indx++] = 0.;
points[indx++] = 0.;
points[indx++] = -dz;
points[indx++] = 0.;
points[indx++] = 0.;
points[indx++] = dz;
// lower rmax circle (2, 2+n-1)
// upper rmax circle (2+n, 2+2n-1)
for (j = 0; j < n; j++) {
phi = j*dphi*TMath::DegToRad();
points[indx+3*n] = points[indx] = fRmax * TMath::Cos(phi);
indx++;
points[indx+3*n] = points[indx] = fRmax * TMath::Sin(phi);
indx++;
points[indx+3*n]= dz;
points[indx] =-dz;
indx++;
}
}
}
}
//_____________________________________________________________________________
void TGeoTube::SetPoints(Float_t *points) const
{
// create tube mesh points
Double_t dz;
Int_t j, n;
n = gGeoManager->GetNsegments();
Double_t dphi = 360./n;
Double_t phi = 0;
dz = fDz;
Int_t indx = 0;
if (points) {
if (HasRmin()) {
// 4*n points
// (0,n-1) lower rmin circle
// (2n, 3n-1) upper rmin circle
for (j = 0; j < n; j++) {
phi = j*dphi*TMath::DegToRad();
points[indx+6*n] = points[indx] = fRmin * TMath::Cos(phi);
indx++;
points[indx+6*n] = points[indx] = fRmin * TMath::Sin(phi);
indx++;
points[indx+6*n] = dz;
points[indx] =-dz;
indx++;
}
// (n, 2n-1) lower rmax circle
// (3n, 4n-1) upper rmax circle
for (j = 0; j < n; j++) {
phi = j*dphi*TMath::DegToRad();
points[indx+6*n] = points[indx] = fRmax * TMath::Cos(phi);
indx++;
points[indx+6*n] = points[indx] = fRmax * TMath::Sin(phi);
indx++;
points[indx+6*n]= dz;
points[indx] =-dz;
indx++;
}
} else {
// centers of lower/upper circles (0,1)
points[indx++] = 0.;
points[indx++] = 0.;
points[indx++] = -dz;
points[indx++] = 0.;
points[indx++] = 0.;
points[indx++] = dz;
// lower rmax circle (2, 2+n-1)
// upper rmax circle (2+n, 2+2n-1)
for (j = 0; j < n; j++) {
phi = j*dphi*TMath::DegToRad();
points[indx+3*n] = points[indx] = fRmax * TMath::Cos(phi);
indx++;
points[indx+3*n] = points[indx] = fRmax * TMath::Sin(phi);
indx++;
points[indx+3*n]= dz;
points[indx] =-dz;
indx++;
}
}
}
}
//_____________________________________________________________________________
Int_t TGeoTube::GetNmeshVertices() const
{
// Return number of vertices of the mesh representation
Int_t n = gGeoManager->GetNsegments();
Int_t numPoints = n*4;
if (!HasRmin()) numPoints = 2*(n+1);
return numPoints;
}
//_____________________________________________________________________________
void TGeoTube::Sizeof3D() const
{
///// fill size of this 3-D object
/// TVirtualGeoPainter *painter = gGeoManager->GetGeomPainter();
/// if (!painter) return;
/// Int_t n = gGeoManager->GetNsegments();
/// Int_t numPoints = n*4;
/// Int_t numSegs = n*8;
/// Int_t numPolys = n*4;
/// painter->AddSize3D(numPoints, numSegs, numPolys);
}
//_____________________________________________________________________________
const TBuffer3D & TGeoTube::GetBuffer3D(Int_t reqSections, Bool_t localFrame) const
{
static TBuffer3DTube buffer;
TGeoBBox::FillBuffer3D(buffer, reqSections, localFrame);
if (reqSections & TBuffer3D::kShapeSpecific) {
buffer.fRadiusInner = fRmin;
buffer.fRadiusOuter = fRmax;
buffer.fHalfLength = fDz;
buffer.SetSectionsValid(TBuffer3D::kShapeSpecific);
}
if (reqSections & TBuffer3D::kRawSizes) {
Int_t n = gGeoManager->GetNsegments();
Int_t NbPnts = 4*n;
Int_t NbSegs = 8*n;
Int_t NbPols = 4*n;
if (!HasRmin()) {
NbPnts = 2*(n+1);
NbSegs = 5*n;
NbPols = 3*n;
}
if (buffer.SetRawSizes(NbPnts, 3*NbPnts, NbSegs, 3*NbSegs, NbPols, 6*NbPols)) {
buffer.SetSectionsValid(TBuffer3D::kRawSizes);
}
}
if ((reqSections & TBuffer3D::kRaw) && buffer.SectionsValid(TBuffer3D::kRawSizes)) {
SetPoints(buffer.fPnts);
if (!buffer.fLocalFrame) {
TransformPoints(buffer.fPnts, buffer.NbPnts());
}
SetSegsAndPols(buffer);
buffer.SetSectionsValid(TBuffer3D::kRaw);
}
return buffer;
}
ClassImp(TGeoTubeSeg)
//_____________________________________________________________________________
TGeoTubeSeg::TGeoTubeSeg()
{
// Default constructor
SetShapeBit(TGeoShape::kGeoTubeSeg);
fPhi1 = fPhi2 = 0.0;
}
//_____________________________________________________________________________
TGeoTubeSeg::TGeoTubeSeg(Double_t rmin, Double_t rmax, Double_t dz,
Double_t phi1, Double_t phi2)
:TGeoTube(rmin, rmax, dz)
{
// Default constructor specifying minimum and maximum radius
SetShapeBit(TGeoShape::kGeoTubeSeg);
SetTubsDimensions(rmin, rmax, dz, phi1, phi2);
ComputeBBox();
}
//_____________________________________________________________________________
TGeoTubeSeg::TGeoTubeSeg(const char *name, Double_t rmin, Double_t rmax, Double_t dz,
Double_t phi1, Double_t phi2)
:TGeoTube(name, rmin, rmax, dz)
{
// Default constructor specifying minimum and maximum radius
SetShapeBit(TGeoShape::kGeoTubeSeg);
SetTubsDimensions(rmin, rmax, dz, phi1, phi2);
ComputeBBox();
}
//_____________________________________________________________________________
TGeoTubeSeg::TGeoTubeSeg(Double_t *param)
:TGeoTube(0, 0, 0)
{
// Default constructor specifying minimum and maximum radius
// param[0] = Rmin
// param[1] = Rmax
// param[2] = dz
// param[3] = phi1
// param[4] = phi2
SetShapeBit(TGeoShape::kGeoTubeSeg);
SetDimensions(param);
ComputeBBox();
}
//_____________________________________________________________________________
TGeoTubeSeg::~TGeoTubeSeg()
{
// destructor
}
//_____________________________________________________________________________
void TGeoTubeSeg::ComputeBBox()
{
// compute bounding box of the tube segment
Double_t xc[4];
Double_t yc[4];
xc[0] = fRmax*TMath::Cos(fPhi1*TMath::DegToRad());
yc[0] = fRmax*TMath::Sin(fPhi1*TMath::DegToRad());
xc[1] = fRmax*TMath::Cos(fPhi2*TMath::DegToRad());
yc[1] = fRmax*TMath::Sin(fPhi2*TMath::DegToRad());
xc[2] = fRmin*TMath::Cos(fPhi1*TMath::DegToRad());
yc[2] = fRmin*TMath::Sin(fPhi1*TMath::DegToRad());
xc[3] = fRmin*TMath::Cos(fPhi2*TMath::DegToRad());
yc[3] = fRmin*TMath::Sin(fPhi2*TMath::DegToRad());
Double_t xmin = xc[TMath::LocMin(4, &xc[0])];
Double_t xmax = xc[TMath::LocMax(4, &xc[0])];
Double_t ymin = yc[TMath::LocMin(4, &yc[0])];
Double_t ymax = yc[TMath::LocMax(4, &yc[0])];
Double_t dp = fPhi2-fPhi1;
if (dp<0) dp+=360;
Double_t ddp = -fPhi1;
if (ddp<0) ddp+= 360;
if (ddp>360) ddp-=360;
if (ddp<=dp) xmax = fRmax;
ddp = 90-fPhi1;
if (ddp<0) ddp+= 360;
if (ddp>360) ddp-=360;
if (ddp<=dp) ymax = fRmax;
ddp = 180-fPhi1;
if (ddp<0) ddp+= 360;
if (ddp>360) ddp-=360;
if (ddp<=dp) xmin = -fRmax;
ddp = 270-fPhi1;
if (ddp<0) ddp+= 360;
if (ddp>360) ddp-=360;
if (ddp<=dp) ymin = -fRmax;
fOrigin[0] = (xmax+xmin)/2;
fOrigin[1] = (ymax+ymin)/2;
fOrigin[2] = 0;
fDX = (xmax-xmin)/2;
fDY = (ymax-ymin)/2;
fDZ = fDz;
}
//_____________________________________________________________________________
void TGeoTubeSeg::ComputeNormal(Double_t *point, Double_t *dir, Double_t *norm)
{
// Compute normal to closest surface from POINT.
Double_t saf[3];
Double_t rsq = point[0]*point[0]+point[1]*point[1];
Double_t r = TMath::Sqrt(rsq);
Double_t c1 = TMath::Cos(fPhi1*TMath::DegToRad());
Double_t s1 = TMath::Sin(fPhi1*TMath::DegToRad());
Double_t c2 = TMath::Cos(fPhi2*TMath::DegToRad());
Double_t s2 = TMath::Sin(fPhi2*TMath::DegToRad());
saf[0] = TMath::Abs(fDz-TMath::Abs(point[2]));
saf[1] = (fRmin>1E-10)?TMath::Abs(r-fRmin):TGeoShape::Big();
saf[2] = TMath::Abs(fRmax-r);
Int_t i = TMath::LocMin(3,saf);
if (TGeoShape::IsCloseToPhi(saf[i], point,c1,s1,c2,s2)) {
TGeoShape::NormalPhi(point,dir,norm,c1,s1,c2,s2);
return;
}
if (i==0) {
norm[0] = norm[1] = 0.;
norm[2] = TMath::Sign(1.,dir[2]);
return;
}
norm[2] = 0;
Double_t phi = TMath::ATan2(point[1], point[0]);
norm[0] = TMath::Cos(phi);
norm[1] = TMath::Sin(phi);
if (norm[0]*dir[0]+norm[1]*dir[1]<0) {
norm[0] = -norm[0];
norm[1] = -norm[1];
}
}
//_____________________________________________________________________________
void TGeoTubeSeg::ComputeNormalS(Double_t *point, Double_t *dir, Double_t *norm,
Double_t rmin, Double_t rmax, Double_t /*dz*/,
Double_t c1, Double_t s1, Double_t c2, Double_t s2)
{
// Compute normal to closest surface from POINT.
Double_t saf[2];
Double_t rsq = point[0]*point[0]+point[1]*point[1];
Double_t r = TMath::Sqrt(rsq);
saf[0] = (rmin>1E-10)?TMath::Abs(r-rmin):TGeoShape::Big();
saf[1] = TMath::Abs(rmax-r);
Int_t i = TMath::LocMin(2,saf);
if (TGeoShape::IsCloseToPhi(saf[i], point,c1,s1,c2,s2)) {
TGeoShape::NormalPhi(point,dir,norm,c1,s1,c2,s2);
return;
}
norm[2] = 0;
Double_t phi = TMath::ATan2(point[1], point[0]);
norm[0] = TMath::Cos(phi);
norm[1] = TMath::Sin(phi);
if (norm[0]*dir[0]+norm[1]*dir[1]<0) {
norm[0] = -norm[0];
norm[1] = -norm[1];
}
}
//_____________________________________________________________________________
Bool_t TGeoTubeSeg::Contains(Double_t *point) const
{
// test if point is inside this tube segment
// first check if point is inside the tube
if (!TGeoTube::Contains(point)) return kFALSE;
return IsInPhiRange(point, fPhi1, fPhi2);
}
//_____________________________________________________________________________
Int_t TGeoTubeSeg::DistancetoPrimitive(Int_t px, Int_t py)
{
// compute closest distance from point px,py to each corner
Int_t n = gGeoManager->GetNsegments()+1;
const Int_t numPoints = 4*n;
return ShapeDistancetoPrimitive(numPoints, px, py);
}
//_____________________________________________________________________________
Double_t TGeoTubeSeg::DistFromInsideS(Double_t *point, Double_t *dir, Double_t rmin, Double_t rmax, Double_t dz,
Double_t c1, Double_t s1, Double_t c2, Double_t s2, Double_t cm, Double_t sm, Double_t cdfi)
{
// Compute distance from inside point to surface of the tube segment (static)
// Boundary safe algorithm.
// Do Z
Double_t stube = TGeoTube::DistFromInsideS(point,dir,rmin,rmax,dz);
if (stube<=0) return 0.0;
Double_t sfmin = TGeoShape::Big();
Double_t rsq = point[0]*point[0]+point[1]*point[1];
Double_t r = TMath::Sqrt(rsq);
Double_t cpsi=point[0]*cm+point[1]*sm;
if (cpsi>r*cdfi+TGeoShape::Tolerance()) {
sfmin = TGeoShape::DistToPhiMin(point, dir, s1, c1, s2, c2, sm, cm);
return TMath::Min(stube,sfmin);
}
// Point on the phi boundary or outside
// which one: phi1 or phi2
Double_t ddotn, xi, yi;
if (TMath::Abs(point[1]-s1*r) < TMath::Abs(point[1]-s2*r)) {
ddotn = s1*dir[0]-c1*dir[1];
if (ddotn>=0) return 0.0;
ddotn = -s2*dir[0]+c2*dir[1];
if (ddotn<=0) return stube;
sfmin = s2*point[0]-c2*point[1];
if (sfmin<=0) return stube;
sfmin /= ddotn;
if (sfmin >= stube) return stube;
xi = point[0]+sfmin*dir[0];
yi = point[1]+sfmin*dir[1];
if (yi*cm-xi*sm<0) return stube;
return sfmin;
}
ddotn = -s2*dir[0]+c2*dir[1];
if (ddotn>=0) return 0.0;
ddotn = s1*dir[0]-c1*dir[1];
if (ddotn<=0) return stube;
sfmin = -s1*point[0]+c1*point[1];
if (sfmin<=0) return stube;
sfmin /= ddotn;
if (sfmin >= stube) return stube;
xi = point[0]+sfmin*dir[0];
yi = point[1]+sfmin*dir[1];
if (yi*cm-xi*sm>0) return stube;
return sfmin;
}
//_____________________________________________________________________________
Double_t TGeoTubeSeg::DistFromInside(Double_t *point, Double_t *dir, Int_t iact, Double_t step, Double_t *safe) const
{
// Compute distance from inside point to surface of the tube segment
// Boundary safe algorithm.
if (iact<3 && safe) {
*safe = SafetyS(point, kTRUE, fRmin, fRmax, fDz, fPhi1, fPhi2);
if (iact==0) return TGeoShape::Big();
if ((iact==1) && (*safe>step)) return TGeoShape::Big();
}
Double_t phi1 = fPhi1*TMath::DegToRad();
Double_t phi2 = fPhi2*TMath::DegToRad();
Double_t c1 = TMath::Cos(phi1);
Double_t c2 = TMath::Cos(phi2);
Double_t s1 = TMath::Sin(phi1);
Double_t s2 = TMath::Sin(phi2);
Double_t phim = 0.5*(phi1+phi2);
Double_t cm = TMath::Cos(phim);
Double_t sm = TMath::Sin(phim);
Double_t dfi = 0.5*(phi2-phi1);
Double_t cdfi = TMath::Cos(dfi);
// compute distance to surface
return TGeoTubeSeg::DistFromInsideS(point,dir,fRmin,fRmax,fDz,c1,s1,c2,s2,cm,sm,cdfi);
}
//_____________________________________________________________________________
Double_t TGeoTubeSeg::DistFromOutsideS(Double_t *point, Double_t *dir, Double_t rmin, Double_t rmax,
Double_t dz, Double_t c1, Double_t s1, Double_t c2, Double_t s2,
Double_t cm, Double_t sm, Double_t cdfi)
{
// Static method to compute distance to arbitrary tube segment from outside point
// Boundary safe algorithm.
Double_t r2, cpsi;
// check Z planes
Double_t xi, yi, zi;
zi = dz - TMath::Abs(point[2]);
Double_t rmaxsq = rmax*rmax;
Double_t rminsq = rmin*rmin;
Double_t s = TGeoShape::Big();
Double_t snxt=TGeoShape::Big();
Bool_t in = kFALSE;
Bool_t inz = (zi<0)?kFALSE:kTRUE;
if (!inz) {
if (point[2]*dir[2]>=0) return TGeoShape::Big();
s = -zi/TMath::Abs(dir[2]);
xi = point[0]+s*dir[0];
yi = point[1]+s*dir[1];
r2=xi*xi+yi*yi;
if ((rminsq<=r2) && (r2<=rmaxsq)) {
cpsi=(xi*cm+yi*sm)/TMath::Sqrt(r2);
if (cpsi>=cdfi) return s;
}
}
// check outer cyl. surface
Double_t rsq = point[0]*point[0]+point[1]*point[1];
Double_t r = TMath::Sqrt(rsq);
Double_t nsq=dir[0]*dir[0]+dir[1]*dir[1];
Double_t rdotn=point[0]*dir[0]+point[1]*dir[1];
Double_t b,d;
Bool_t inrmax = kFALSE;
Bool_t inrmin = kFALSE;
Bool_t inphi = kFALSE;
if (rsq<=rmaxsq+TGeoShape::Tolerance()) inrmax = kTRUE;
if (rsq>=rminsq-TGeoShape::Tolerance()) inrmin = kTRUE;
cpsi=point[0]*cm+point[1]*sm;
if (cpsi>r*cdfi-TGeoShape::Tolerance()) inphi = kTRUE;
in = inz & inrmin & inrmax & inphi;
// If inside, we are most likely on a boundary within machine precision.
if (in) {
Bool_t checkout = kFALSE;
Double_t safphi = (cpsi-r*cdfi)*TMath::Sqrt(1.-cdfi*cdfi);
// Double_t sch, cch;
// check if on Z boundaries
if (zi<rmax-r) {
if ((rmin==0) || (zi<r-rmin)) {
if (zi<safphi) {
if (point[2]*dir[2]<0) return 0.0;
return TGeoShape::Big();
}
}
}
if ((rmaxsq-rsq) < (rsq-rminsq)) checkout = kTRUE;
// check if on Rmax boundary
if (checkout && (rmax-r<safphi)) {
if (rdotn>=0) return TGeoShape::Big();
return 0.0;
}
if (TMath::Abs(nsq)<TGeoShape::Tolerance()) return TGeoShape::Big();
// check if on phi boundary
if ((rmin==0) || (safphi<r-rmin)) {
// We may cross again a phi of rmin boundary
// check first if we are on phi1 or phi2
Double_t un;
if (TMath::Abs(point[1]-s1*r) < TMath::Abs(point[1]-s2*r)) {
un = dir[0]*s1-dir[1]*c1;
if (un < 0) return 0.0;
if (cdfi>=0) return TGeoShape::Big();
un = -dir[0]*s2+dir[1]*c2;
if (un<0) {
s = -point[0]*s2+point[1]*c2;
if (s>0) {
s /= (-un);
zi = point[2]+s*dir[2];
if (TMath::Abs(zi)<=dz) {
xi = point[0]+s*dir[0];
yi = point[1]+s*dir[1];
r2=xi*xi+yi*yi;
if ((rminsq<=r2) && (r2<=rmaxsq)) {
if ((yi*cm-xi*sm)>0) return s;
}
}
}
}
} else {
un = -dir[0]*s2+dir[1]*c2;
if (un < 0) return 0.0;
if (cdfi>=0) return TGeoShape::Big();
un = dir[0]*s1-dir[1]*c1;
if (un<0) {
s = point[0]*s1-point[1]*c1;
if (s>0) {
s /= (-un);
zi = point[2]+s*dir[2];
if (TMath::Abs(zi)<=dz) {
xi = point[0]+s*dir[0];
yi = point[1]+s*dir[1];
r2=xi*xi+yi*yi;
if ((rminsq<=r2) && (r2<=rmaxsq)) {
if ((yi*cm-xi*sm)<0) return s;
}
}
}
}
}
// We may also cross rmin, (+) solution
if (rdotn>=0) return TGeoShape::Big();
if (cdfi>=0) return TGeoShape::Big();
DistToTube(rsq, nsq, rdotn, rmin, b, d);
if (d>0) {
s=-b+d;
if (s>0) {
zi=point[2]+s*dir[2];
if (TMath::Abs(zi)<=dz) {
xi=point[0]+s*dir[0];
yi=point[1]+s*dir[1];
if ((xi*cm+yi*sm) >= rmin*cdfi) return s;
}
}
}
return TGeoShape::Big();
}