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TPGON.cxx
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1// @(#)root/g3d:$Id$
2// Author: Nenad Buncic 29/09/95
3
4/*************************************************************************
5 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
6 * All rights reserved. *
7 * *
8 * For the licensing terms see $ROOTSYS/LICENSE. *
9 * For the list of contributors see $ROOTSYS/README/CREDITS. *
10 *************************************************************************/
11
12#include "TPGON.h"
13#include "TMath.h"
14
16
17/** \class TPGON
18\ingroup g3d
19A polygon.
20
21\image html g3d_pgon.png
22
23It has the following parameters:
24
25 - name: name of the shape
26 - title: shape's title
27 - material: (see TMaterial)
28 - phi1: the azimuthal angle &phi at which the volume begins (angles
29 are counted counterclockwise)
30 - dphi1: opening angle of the volume, which extends from phi1 to
31 phi1+dphi
32 - npdv: number of sides of the cross section between the given
33 phi limits
34 - nz: number of planes perpendicular to the z axis where
35 the dimension of the section is given -- this number
36 should be at least 2
37 - rmin: array of dimension nz with minimum radius at a given plane
38 - rmax: array of dimension nz with maximum radius at a given plane
39 - z: array of dimension nz with z position of given plane
40*/
41
42////////////////////////////////////////////////////////////////////////////////
43/// PGON shape default constructor.
44
46{
47}
48
49////////////////////////////////////////////////////////////////////////////////
50/// PGON shape normal constructor.
51///
52/// Parameters of the nz positions must be entered via TPCON::DefineSection.
53
54TPGON::TPGON (const char *name, const char *title, const char *material, Float_t phi1,
55 Float_t dphi1, Int_t npdv, Int_t nz)
56 : TPCON (name, title,material, phi1, dphi1, nz)
57{
59}
60
61////////////////////////////////////////////////////////////////////////////////
62/// PGON shape default destructor.
63
65{
66}
67
68////////////////////////////////////////////////////////////////////////////////
69/// Fill the table of cos and sin to prepare drawing
70
72{
73 Double_t factor = 1./TMath::Cos(angstep/2);
74 Double_t ph = phi-angstep;
75 for (Int_t j = 0; j < n; j++) {
76 ph += angstep;
77 fCoTab[j] = factor*TMath::Cos(ph);
78 fSiTab[j] = factor*TMath::Sin(ph);
79 }
80}
float Float_t
Definition: RtypesCore.h:57
char name[80]
Definition: TGX11.cxx:110
ClassImp(TPGON)
A polycone.
Definition: TPCON.h:33
virtual void SetNumberOfDivisions(Int_t p)
Set number of divisions.
Definition: TPCON.cxx:212
Double_t * fCoTab
Table of sin(fPhi1) .... sin(fPhil+fDphi1)
Definition: TPCON.h:37
Double_t * fSiTab
Definition: TPCON.h:36
A polygon.
Definition: TPGON.h:30
virtual ~TPGON()
PGON shape default destructor.
Definition: TPGON.cxx:64
TPGON()
PGON shape default constructor.
Definition: TPGON.cxx:45
virtual void FillTableOfCoSin(Double_t phi, Double_t angstep, Int_t n) const
Fill the table of cos and sin to prepare drawing.
Definition: TPGON.cxx:71
const Int_t n
Definition: legend1.C:16
Double_t Cos(Double_t)
Definition: TMath.h:593
Double_t Sin(Double_t)
Definition: TMath.h:589