TTRD1.cxx

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// @(#)root/g3d:$Id$
// Author: Nenad Buncic   17/09/95
 
/*************************************************************************
 * 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 "TTRD1.h"
#include "TNode.h"
 
ClassImp(TTRD1);
 
/** \class TTRD1
\ingroup g3d
A trapezoid with the x dimension varying along z.
 
\image html g3d_trd1.png
 
It has 7 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
  - dy:         half-length along the y-axis
  - dz:         half-length along the z-axis
*/
 
////////////////////////////////////////////////////////////////////////////////
/// TRD1 shape default constructor
 
TTRD1::TTRD1()
{
   fDx2 = 0.;
}
 
////////////////////////////////////////////////////////////////////////////////
/// TRD1 shape normal constructor
 
TTRD1::TTRD1(const char *name, const char *title, const char *material, Float_t dx1, Float_t dx2, Float_t dy, Float_t dz)
      : TBRIK(name, title,material,dx1,dy,dz)
{
   fDx2 = dx2;
}
 
////////////////////////////////////////////////////////////////////////////////
/// TRD1 shape default destructor
 
TTRD1::~TTRD1()
{
}
 
////////////////////////////////////////////////////////////////////////////////
/// Create TRD1 points
 
void TTRD1::SetPoints(Double_t *points) const
{
   Float_t dx1, dx2, dy, dz;
 
   dx1 = TBRIK::fDx;
   dx2 = fDx2;
   dy  = TBRIK::fDy;
   dz  = TBRIK::fDz;
 
   if (points) {
      points[ 0] = -dx1 ; points[ 1] = -dy ; points[ 2] = -dz;
      points[ 3] = -dx1 ; points[ 4] =  dy ; points[ 5] = -dz;
      points[ 6] =  dx1 ; points[ 7] =  dy ; points[ 8] = -dz;
      points[ 9] =  dx1 ; points[10] = -dy ; points[11] = -dz;
      points[12] = -dx2 ; points[13] = -dy ; points[14] =  dz;
      points[15] = -dx2 ; points[16] =  dy ; points[17] =  dz;
      points[18] =  dx2 ; points[19] =  dy ; points[20] =  dz;
      points[21] =  dx2 ; points[22] = -dy ; points[23] =  dz;
   }
}