TCONE.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 "TCONE.h"
#include "TNode.h"
 
 
/** \class TCONE
\ingroup g3d
 
A conical tube.
 
\image html g3d_cone.png
It has 8 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
*/
 
////////////////////////////////////////////////////////////////////////////////
/// CONE shape default constructor
 
TCONE::TCONE()
{
   fRmin2 = 0.;
   fRmax2 = 0.;
}
 
////////////////////////////////////////////////////////////////////////////////
/// CONE shape normal constructor
 
TCONE::TCONE(const char *name, const char *title, const char *material, Float_t dz,
             Float_t rmin1, Float_t rmax1,
             Float_t rmin2, Float_t rmax2)
      : TTUBE(name, title,material,rmin1,rmax1,dz)
{
   fRmin2 = rmin2;
   fRmax2 = rmax2;
}
 
////////////////////////////////////////////////////////////////////////////////
/// CONE shape "simplified" constructor
 
TCONE::TCONE(const char *name, const char *title, const char *material, Float_t dz, Float_t rmax1
            , Float_t rmax2) : TTUBE(name, title,material,0,rmax1,dz)
{
   fRmin2 = 0;
   fRmax2 = rmax2;
}
 
////////////////////////////////////////////////////////////////////////////////
/// CONE shape default destructor
 
TCONE::~TCONE()
{
}
 
////////////////////////////////////////////////////////////////////////////////
/// Create CONE points
 
void TCONE::SetPoints(Double_t *points) const
{
   Double_t rmin1, rmax1, dz;
   Int_t j, n;
 
   n = GetNumberOfDivisions();
 
   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;
      }
   }
}