TTRD2.cxx

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// @(#)root/g3d:$Id$
// Author: Nenad Buncic   13/09/95

/*************************************************************************
 * 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 "TTRD2.h"
#include "TNode.h"

ClassImp(TTRD2)

/** \class TTRD2
\ingroup g3d
A trapezoid with both x and y dimensions varying along z.

\image html g3d_trd2.png
It has 8 parameters:

  - name:       name of the shape
  - title:      shape's title
  - material:  (see TMaterial)
  - dx1:        half-length along x at the z surface positioned at -DZ
  - dx2:        half-length along x at the z surface positioned at +DZ
  - dy1:        half-length along y at the z surface positioned at -DZ
  - dy2:        half-length along y at the z surface positioned at +DZ
  - dz:         half-length along the z-axis
*/

////////////////////////////////////////////////////////////////////////////////
/// TRD2 shape default constructor

TTRD2::TTRD2()
{
   fDx2 = 0.;
   fDy2 = 0.;
}

////////////////////////////////////////////////////////////////////////////////
/// TRD2 shape normal constructor

TTRD2::TTRD2(const char *name, const char *title, const char *material, Float_t dx1, Float_t dx2, Float_t dy1,
       Float_t dy2, Float_t dz) : TBRIK(name, title,material,dx1,dy1,dz)
{
   fDx2 = dx2;
   fDy2 = dy2;
}

////////////////////////////////////////////////////////////////////////////////
/// TRD2 shape default destructor

TTRD2::~TTRD2()
{
}

////////////////////////////////////////////////////////////////////////////////
/// Create TRD2 points

void TTRD2::SetPoints(Double_t *points) const
{
   Float_t dx1, dx2, dy1, dy2, dz;

   dx1 = TBRIK::fDx;
   dx2 = fDx2;
   dy1 = TBRIK::fDy;
   dy2 = fDy2;
   dz  = TBRIK::fDz;

   if (points) {
      points[ 0] = -dx1 ; points[ 1] = -dy1 ; points[ 2] = -dz;
      points[ 3] = -dx1 ; points[ 4] =  dy1 ; points[ 5] = -dz;
      points[ 6] =  dx1 ; points[ 7] =  dy1 ; points[ 8] = -dz;
      points[ 9] =  dx1 ; points[10] = -dy1 ; points[11] = -dz;
      points[12] = -dx2 ; points[13] = -dy2 ; points[14] =  dz;
      points[15] = -dx2 ; points[16] =  dy2 ; points[17] =  dz;
      points[18] =  dx2 ; points[19] =  dy2 ; points[20] =  dz;
      points[21] =  dx2 ; points[22] = -dy2 ; points[23] =  dz;
   }
}