| Geant4 Cross Reference |
1
2 =========================================
3 Geant4 - an Object-Oriented Toolkit for S
4 =========================================
5
6 ExampleP02
7 ----------
8
9 General description
10 -------------------
11
12 This example shows how to store in a binary fi
13 read back the geometry tree using the 'reflect
14 persistency provided by the Reflex tool also i
15 Reflex tool allows to create a dictionary for
16 making then possible to save the entire tree i
17
18 The provided makefile produces the executable:
19 to run it one has to specify the argument, eit
20 'read'. In the first case the geometry is inst
21 way and then saved into the root file (geo.roo
22 the geometry is read from geo.root file.
23
24
25 Building and running the example
26 --------------------------------
27
28 This examples requires the ROOT toolkit of ver
29 provided CMake file checks for the existence o
30 Once the CMake configuration has been succesfu
31 for this example should be built using make
32 (in your CMake build directory):
33
34 make
35
36 Remark on dictionary generation
37 -------------------------------
38
39 The dictionary is generated by ${ROOTSYS}/bin/
40 tool. The arguments that will be used by this
41 in CMakeLists.txt using the CMake function REF
42 provided by ROOT. They include the header file
43 all the classes we want to generate the dictio
44 a so called selection file (xml). The role of
45 specify which classes we want to generate the
46 selection file for our dictionary is in xml/ d
47 to genreflex manual for more details concernin
48 tool.
49
50 Concerning generating dictionary for the Geant
51 also two technical remarks that need to be mad
52 The Reflex tool requires all the templated cla
53 explicitely used somewhere in the included hea
54 the generation of the dictionary to be possibl
55 classes for which it is not the case, the prob
56 solved by instaciating them in the headerfile
57 genreflex (see includes/ExP02Classes.hh) as ar
58 The second remark is that there is an unfortun
59 far as G4String class is concerned. The header
60 defines __G4String which happens to be the nam
61 within the generated dictionary code. The solu
62 #undef __G4String in include/ExP02Classes.hh f