TCONS.cxx

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// @(#)root/g3d:$Id$
// Author: Nenad Buncic   18/09/95

/*************************************************************************
 * 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.             *
 *************************************************************************/

#include "TCONS.h"
#include "TNode.h"

ClassImp(TCONS)

/** \class TCONS
\ingroup g3d
A segment of a conical tube.

\image html g3d_cons.png

It has 10 parameters:

  - name:       name of the shape
  - title:      shape's title
  - material:  (see TMaterial)
  - dz:         half-length in z
  - rmin1:      inside radius at -DZ in z
  - rmax1:      outside radius at -DZ in z
  - rmin2:      inside radius at +DZ in z
  - rmax2:      outside radius at +DZ in z
  - phi1:       starting angle of the segment
  - phi2:       ending angle of the segment

NOTE: phi1 should be smaller than phi2. If this is not the case,
      the system adds 360 degrees to phi2.
*/

////////////////////////////////////////////////////////////////////////////////
/// CONS shape default constructor

TCONS::TCONS()
{
   fRmin2 = 0.;
   fRmax2 = 0.;
}

////////////////////////////////////////////////////////////////////////////////
/// CONS shape normal constructor

TCONS::TCONS(const char *name, const char *title, const char *material, Float_t dz, Float_t rmin1, Float_t rmax1, Float_t rmin2, Float_t rmax2,
             Float_t phi1, Float_t phi2)
      : TTUBS(name,title,material,rmin1,rmax1,dz,phi1,phi2)
{
   fRmin2 = rmin2;
   fRmax2 = rmax2;
}

////////////////////////////////////////////////////////////////////////////////
/// CONS shape normal constructor

TCONS::TCONS(const char *name, const char *title, const char *material,  Float_t rmax1, Float_t dz
                          , Float_t phi1, Float_t phi2, Float_t rmax2)
             : TTUBS(name,title,material,rmax1,dz,phi1,phi2)
{
   fRmin2 = 0;
   fRmax2 = rmax2;
}

////////////////////////////////////////////////////////////////////////////////
/// CONS shape default destructor

TCONS::~TCONS()
{
}

////////////////////////////////////////////////////////////////////////////////
/// Create CONS points

void TCONS::SetPoints(Double_t *points) const
{
   Int_t j, n;
   Float_t rmin1, rmax1, dz;

   n = GetNumberOfDivisions()+1;

   rmin1 = TTUBE::fRmin;
   rmax1 = TTUBE::fRmax;
   dz    = TTUBE::fDz;

   Int_t indx = 0;

   if (!fCoTab) MakeTableOfCoSin();

   if (points) {
      for (j = 0; j < n; j++) {
         points[indx++] = rmin1 * fCoTab[j];
         points[indx++] = rmin1 * fSiTab[j];
         points[indx++] = -dz;
      }
      for (j = 0; j < n; j++) {
         points[indx++] = rmax1 * fCoTab[j];
         points[indx++] = rmax1 * fSiTab[j];
         points[indx++] = -dz;
      }
      for (j = 0; j < n; j++) {
         points[indx++] = fRmin2 * fCoTab[j];
         points[indx++] = fRmin2 * fSiTab[j];
         points[indx++] = dz;
      }
      for (j = 0; j < n; j++) {
         points[indx++] = fRmax2 * fCoTab[j];
         points[indx++] = fRmax2 * fSiTab[j];
         points[indx++] = dz;
      }
   }
}