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6.12/07
Reference Guide
graf3d
g3d
src
TTRAP.cxx
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// @(#)root/g3d:$Id$
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// Author: Nenad Buncic 19/09/95
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/*************************************************************************
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* Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
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* All rights reserved. *
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* *
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* For the licensing terms see $ROOTSYS/LICENSE. *
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* For the list of contributors see $ROOTSYS/README/CREDITS. *
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*************************************************************************/
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#include "
TTRAP.h
"
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#include "
TNode.h
"
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#include "
TMath.h
"
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ClassImp
(
TTRAP
);
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/** \class TTRAP
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\ingroup g3d
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A general trapezoid.
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\image html g3d_trap.png
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The faces perpendicular to z are trapezia and
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their centres are not necessarily on a line parallel to the z axis.
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This shape has 14 parameters.
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- name: name of the shape
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- title: shape's title
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- material: (see TMaterial)
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- dz: half-length along the z axis
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- theta: polar angle of the line joining the centre of the face
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at -DZ to the centre of the one at +DZ
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- phi: azimuthal angle of the line joining the centre of the face
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at -DZ to the centre of the one at +DZ
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- h1: half-length along y of the face at -DZ
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- bl1: half-length along x of the side at -H1 in y of the face
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at -DZ in z
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- tl1: half-length along x of the side at +H1 in y of the face
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at -DZ in z
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- alpha1: angle with respect to the y axis from the centre of the
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side at -H1 in y to the centre of the side at +H1 in y
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of the face at -DZ in z
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- h2: half-length along y of the face at +DZ
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- bl2: half-length along x of the side at -H2 in y of the
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face at +DZ in z
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- tl2: half-length along x of the side at +H2 in y of the face
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at +DZ in z
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- alpha2: angle with respect to the y axis from the centre of the side
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at -H2 in y to the centre of the side at +H2 in y of the
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face at +DZ in z
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*/
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////////////////////////////////////////////////////////////////////////////////
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/// TRAP shape default constructor
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TTRAP::TTRAP
()
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{
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fH1
= 0.;
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fBl1
= 0.;
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fTl1
= 0.;
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fAlpha1
= 0.;
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fH2
= 0.;
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fBl2
= 0.;
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fTl2
= 0.;
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fAlpha2
= 0.;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// TRAP shape normal constructor
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TTRAP::TTRAP
(
const
char
*
name
,
const
char
*title,
const
char
*material,
Float_t
dz,
Float_t
theta,
Float_t
phi,
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Float_t
h1
,
Float_t
bl1,
Float_t
tl1,
Float_t
alpha1,
Float_t
h2,
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Float_t
bl2,
Float_t
tl2,
Float_t
alpha2) :
TBRIK
(name, title,material,theta,phi,dz)
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{
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fH1
=
h1
;
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fBl1
= bl1;
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fTl1
= tl1;
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fAlpha1
= alpha1;
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fH2
= h2;
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fBl2
= bl2;
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fTl2
= tl2;
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fAlpha2
= alpha2;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// TRAP shape default destructor
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TTRAP::~TTRAP
()
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{
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}
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////////////////////////////////////////////////////////////////////////////////
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/// Create TRAP points
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void
TTRAP::SetPoints
(
Double_t
*
points
)
const
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{
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const
Float_t
pi
=
Float_t
(
TMath::Pi
());
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Float_t
alpha1 =
fAlpha1
* pi/180.0;
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Float_t
alpha2 =
fAlpha2
* pi/180.0;
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Float_t
theta =
TBRIK::fDx
* pi/180.0;
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Float_t
phi =
TBRIK::fDy
* pi/180.0;
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Float_t
tth =
TMath::Tan
(theta);
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Float_t
tx = tth*
TMath::Cos
(phi);
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Float_t
ty = tth*
TMath::Sin
(phi);
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Float_t
tth1 =
TMath::Tan
(alpha1);
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Float_t
tth2 =
TMath::Tan
(alpha2);
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if
(points) {
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points[ 0] = -
fDz
*tx-tth1*
fH1
-
fBl1
; points[ 1] = -
fH1
-
fDz
*ty ; points[ 2] = -
fDz
;
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points[ 3] = -
fDz
*tx+tth1*
fH1
-
fTl1
; points[ 4] =
fH1
-
fDz
*ty ; points[ 5] = -
fDz
;
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points[ 6] = -
fDz
*tx+tth1*
fH1
+
fTl1
; points[ 7] =
fH1
-
fDz
*ty ; points[ 8] = -
fDz
;
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points[ 9] = -
fDz
*tx-tth1*
fH1
+
fBl1
; points[10] = -
fH1
-
fDz
*ty ; points[11] = -
fDz
;
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points[12] =
fDz
*tx-tth2*
fH2
-
fBl2
; points[13] = -
fH2
+
fDz
*ty ; points[14] =
fDz
;
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points[15] =
fDz
*tx+tth2*
fH2
-
fTl2
; points[16] =
fH2
+
fDz
*ty ; points[17] =
fDz
;
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points[18] =
fDz
*tx+tth2*
fH2
+
fTl2
; points[19] =
fH2
+
fDz
*ty ; points[20] =
fDz
;
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points[21] =
fDz
*tx-tth2*
fH2
+
fBl2
; points[22] = -
fH2
+
fDz
*ty ; points[23] =
fDz
;
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}
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}
TTRAP::fTl2
Float_t fTl2
Definition:
TTRAP.h:41
TGeoUnit::pi
static constexpr double pi
Definition:
TGeoSystemOfUnits.h:67
TTRAP::fAlpha1
Float_t fAlpha1
Definition:
TTRAP.h:38
Float_t
float Float_t
Definition:
RtypesCore.h:53
TTRAP::fBl2
Float_t fBl2
Definition:
TTRAP.h:40
TBRIK::fDx
Float_t fDx
Definition:
TBRIK.h:29
TTRAP::~TTRAP
virtual ~TTRAP()
TRAP shape default destructor.
Definition:
TTRAP.cxx:89
TTRAP::fH2
Float_t fH2
Definition:
TTRAP.h:39
TTRAP::fBl1
Float_t fBl1
Definition:
TTRAP.h:36
TTRAP.h
h1
TH1F * h1
Definition:
legend1.C:5
TMath::Pi
constexpr Double_t Pi()
Definition:
TMath.h:40
TTRAP::fH1
Float_t fH1
Definition:
TTRAP.h:35
points
point * points
Definition:
X3DBuffer.c:20
TTRAP
A general trapezoid.
Definition:
TTRAP.h:33
TMath::Cos
Double_t Cos(Double_t)
Definition:
TMath.h:550
TBRIK
A box with faces perpendicular to the axes.
Definition:
TBRIK.h:26
TTRAP::TTRAP
TTRAP()
TRAP shape default constructor.
Definition:
TTRAP.cxx:57
ClassImp
#define ClassImp(name)
Definition:
Rtypes.h:359
Double_t
double Double_t
Definition:
RtypesCore.h:55
TTRAP::fTl1
Float_t fTl1
Definition:
TTRAP.h:37
TMath::Sin
Double_t Sin(Double_t)
Definition:
TMath.h:547
TMath.h
TMath::Tan
Double_t Tan(Double_t)
Definition:
TMath.h:553
name
char name[80]
Definition:
TGX11.cxx:109
TBRIK::fDy
Float_t fDy
Definition:
TBRIK.h:30
TBRIK::fDz
Float_t fDz
Definition:
TBRIK.h:31
TTRAP::SetPoints
virtual void SetPoints(Double_t *points) const
Create TRAP points.
Definition:
TTRAP.cxx:96
TTRAP::fAlpha2
Float_t fAlpha2
Definition:
TTRAP.h:42
TNode.h