// @(#)root/g3d:$Name:  $:$Id: TTRAP.cxx,v 1.1.1.1 2000/05/16 17:00:43 rdm Exp $
// Author: Nenad Buncic   19/09/95

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

ClassImp(TTRAP)


//______________________________________________________________________________
//  

// TRAP is a general trapezoid. The faces perpendicular to z are trapezia and // their centres are not necessarily on a line parallel to the z axis. // This shape has 14 parameters. // // - name name of the shape // - title shape's title // - material (see TMaterial) // - dz half-length along the z axis // - theta polar angle of the line joining the centre of the face // at -DZ to the centre of the one at +DZ // - phi azimuthal angle of the line joining the centre of the face // at -DZ to the centre of the one at +DZ // - h1 half-length along y of the face at -DZ // - bl1 half-length along x of the side at -H1 in y of the face // at -DZ in z // - tl1 half-length along x of the side at +H1 in y of the face // at -DZ in z // - alpha1 angle with respect to the y axis from the centre of the // side at -H1 in y to the centre of the side at +H1 in y // of the face at -DZ in z // - h2 half-length along y of the face at +DZ // - bl2 half-length along x of the side at -H2 in y of the // face at +DZ in z // - tl2 half-length along x of the side at +H2 in y of the face // at +DZ in z // - alpha2 angle with respect to the y axis from the centre of the side // at -H2 in y to the centre of the side at +H2 in y of the // face at +DZ in z //______________________________________________________________________________ TTRAP::TTRAP() { //*-*-*-*-*-*-*-*-*-*-*-*-*TRAP shape default constructor*-*-*-*-*-*-*-*-*-*-*-* //*-* ============================== } //______________________________________________________________________________ TTRAP::TTRAP(const char *name, const char *title, const char *material, Float_t dz, Float_t theta, Float_t phi, Float_t h1, Float_t bl1, Float_t tl1, Float_t alpha1, Float_t h2, Float_t bl2, Float_t tl2, Float_t alpha2) : TBRIK(name, title,material,theta,phi,dz) { //*-*-*-*-*-*-*-*-*-*-*-*-*TRAP shape normal constructor*-*-*-*-*-*-*-*-*-*-*-*-* //*-* ============================= fH1 = h1; fBl1 = bl1; fTl1 = tl1; fAlpha1 = alpha1; fH2 = h2; fBl2 = bl2; fTl2 = tl2; fAlpha2 = alpha2; } //______________________________________________________________________________ TTRAP::~TTRAP() { //*-*-*-*-*-*-*-*-*-*-*-*-*TRAP shape default destructor*-*-*-*-*-*-*-*-*-*-*-*-* //*-* ============================= } //______________________________________________________________________________ void TTRAP::SetPoints(Float_t *buff) { //*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*Create TRAP points*-*-*-*-*-*-*-*-*-*-*-*-*-*-* //*-* ================== const Float_t PI = Float_t (TMath::Pi()); Float_t alpha1 = fAlpha1 * PI/180.0; Float_t alpha2 = fAlpha2 * PI/180.0; Float_t theta = TBRIK::fDx * PI/180.0; Float_t phi = TBRIK::fDy * PI/180.0; Float_t tth = TMath::Tan(theta); Float_t tx = tth*TMath::Cos(phi); Float_t ty = tth*TMath::Sin(phi); Float_t tth1 = TMath::Tan(alpha1); Float_t tth2 = TMath::Tan(alpha2); if (buff) { buff[ 0] = -fDz*tx+tth1*fH1+fTl1; buff[ 1] = fH1-fDz*ty; buff[ 2] = -fDz; buff[ 3] = -fDz*tx+tth1*fH1-fTl1; buff[ 4] = fH1-fDz*ty; buff[ 5] = -fDz; buff[ 6] = -fDz*tx-tth1*fH1-fBl1; buff[ 7] = -fH1-fDz*ty; buff[ 8] = -fDz; buff[ 9] = -fDz*tx-tth1*fH1+fBl1; buff[10] = -fH1-fDz*ty; buff[11] = -fDz; buff[12] = fDz*tx+tth2*fH2+fTl2; buff[13] = fH2+fDz*ty; buff[14] = fDz; buff[15] = fDz*tx+tth2*fH2-fTl2; buff[16] = fH2+fDz*ty; buff[17] = fDz; buff[18] = fDz*tx-tth2*fH2-fBl2; buff[19] = -fH2+fDz*ty; buff[20] = fDz; buff[21] = fDz*tx-tth2*fH2+fBl2; buff[22] = -fH2+fDz*ty; buff[23] = fDz; } }


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