Logo ROOT   6.30.04
Reference Guide
 All Namespaces Files Pages
TTRD1.cxx
Go to the documentation of this file.
1 // @(#)root/g3d:$Id$
2 // Author: Nenad Buncic 17/09/95
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 "TTRD1.h"
13 #include "TNode.h"
14 
15 ClassImp(TTRD1);
16 
17 /** \class TTRD1
18 \ingroup g3d
19 A trapezoid with the x dimension varying along z.
20 
21 \image html g3d_trd1.png
22 
23 It has 7 parameters:
24 
25  - name: name of the shape
26  - title: shape's title
27  - material: (see TMaterial)
28  - dx1: half-length along x at the z surface positioned at -DZ
29  - dx2: half-length along x at the z surface positioned at +DZ
30  - dy: half-length along the y-axis
31  - dz: half-length along the z-axis
32 */
33 
34 ////////////////////////////////////////////////////////////////////////////////
35 /// TRD1 shape default constructor
36 
37 TTRD1::TTRD1()
38 {
39  fDx2 = 0.;
40 }
41 
42 ////////////////////////////////////////////////////////////////////////////////
43 /// TRD1 shape normal constructor
44 
45 TTRD1::TTRD1(const char *name, const char *title, const char *material, Float_t dx1, Float_t dx2, Float_t dy, Float_t dz)
46  : TBRIK(name, title,material,dx1,dy,dz)
47 {
48  fDx2 = dx2;
49 }
50 
51 ////////////////////////////////////////////////////////////////////////////////
52 /// TRD1 shape default destructor
53 
54 TTRD1::~TTRD1()
55 {
56 }
57 
58 ////////////////////////////////////////////////////////////////////////////////
59 /// Create TRD1 points
60 
61 void TTRD1::SetPoints(Double_t *points) const
62 {
63  Float_t dx1, dx2, dy, dz;
64 
65  dx1 = TBRIK::fDx;
66  dx2 = fDx2;
67  dy = TBRIK::fDy;
68  dz = TBRIK::fDz;
69 
70  if (points) {
71  points[ 0] = -dx1 ; points[ 1] = -dy ; points[ 2] = -dz;
72  points[ 3] = -dx1 ; points[ 4] = dy ; points[ 5] = -dz;
73  points[ 6] = dx1 ; points[ 7] = dy ; points[ 8] = -dz;
74  points[ 9] = dx1 ; points[10] = -dy ; points[11] = -dz;
75  points[12] = -dx2 ; points[13] = -dy ; points[14] = dz;
76  points[15] = -dx2 ; points[16] = dy ; points[17] = dz;
77  points[18] = dx2 ; points[19] = dy ; points[20] = dz;
78  points[21] = dx2 ; points[22] = -dy ; points[23] = dz;
79  }
80 }