1 | // |
---|
2 | // ******************************************************************** |
---|
3 | // * License and Disclaimer * |
---|
4 | // * * |
---|
5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
7 | // * conditions of the Geant4 Software License, included in the file * |
---|
8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
9 | // * include a list of copyright holders. * |
---|
10 | // * * |
---|
11 | // * Neither the authors of this software system, nor their employing * |
---|
12 | // * institutes,nor the agencies providing financial support for this * |
---|
13 | // * work make any representation or warranty, express or implied, * |
---|
14 | // * regarding this software system or assume any liability for its * |
---|
15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
16 | // * for the full disclaimer and the limitation of liability. * |
---|
17 | // * * |
---|
18 | // * This code implementation is the result of the scientific and * |
---|
19 | // * technical work of the GEANT4 collaboration. * |
---|
20 | // * By using, copying, modifying or distributing the software (or * |
---|
21 | // * any work based on the software) you agree to acknowledge its * |
---|
22 | // * use in resulting scientific publications, and indicate your * |
---|
23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
24 | // ******************************************************************** |
---|
25 | // |
---|
26 | // |
---|
27 | // $Id: testSurfaceAreaCube.cc,v 1.1 2006/10/20 14:38:52 gcosmo Exp $ |
---|
28 | // GEANT4 tag $Name: geant4-09-04-ref-00 $ |
---|
29 | // |
---|
30 | // -------------------------------------------------------------------- |
---|
31 | // Adapted by Hans Dierckx to test surface Area |
---|
32 | |
---|
33 | // The MC method is applied to different solids that have a total surface |
---|
34 | // area of 100 units. The method is repeated 20 times, after which the |
---|
35 | // average and standard deviation is calculated. This generates the graphs |
---|
36 | // in the report, if one would set the right values for N and gamma in |
---|
37 | // G4VSolid.cc. |
---|
38 | |
---|
39 | // Ensure asserts are compiled in |
---|
40 | |
---|
41 | #include <assert.h> |
---|
42 | #include <cmath> |
---|
43 | #include <ctime> |
---|
44 | |
---|
45 | #include "globals.hh" |
---|
46 | #include "geomdefs.hh" |
---|
47 | |
---|
48 | #include "G4ThreeVector.hh" |
---|
49 | |
---|
50 | #include "G4Box.hh" |
---|
51 | #include "G4Tubs.hh" |
---|
52 | #include "G4Trap.hh" |
---|
53 | #include "G4Trd.hh" |
---|
54 | #include "G4Para.hh" |
---|
55 | #include "G4Sphere.hh" |
---|
56 | #include "G4Orb.hh" |
---|
57 | #include "G4Torus.hh" |
---|
58 | #include "G4Cons.hh" |
---|
59 | #include "G4BooleanSolid.hh" |
---|
60 | #include "G4IntersectionSolid.hh" |
---|
61 | |
---|
62 | #include "G4RotationMatrix.hh" |
---|
63 | #include "G4AffineTransform.hh" |
---|
64 | #include "G4VoxelLimits.hh" |
---|
65 | |
---|
66 | |
---|
67 | #include "Randomize.hh" |
---|
68 | |
---|
69 | /* |
---|
70 | G4bool testG4Surf() |
---|
71 | { |
---|
72 | G4double surf, MCsurf; |
---|
73 | |
---|
74 | G4cout << "\n\nCalculating Box:" << G4endl; |
---|
75 | G4Box box("Test Box",1,0.5,3); |
---|
76 | // fDx fDy fDz |
---|
77 | surf = box.GetSurfaceArea(); |
---|
78 | G4cout <<"Surface = " << surf << G4endl; |
---|
79 | G4IntersectionSolid box2("Box 2", &box, &w); |
---|
80 | MCsurf= box2.GetSurfaceArea(); |
---|
81 | G4cout <<"MC result = " << MCsurf << G4endl; |
---|
82 | G4cout << "deviation =" << (surf-MCsurf)/surf*100 << " %"<< G4endl; |
---|
83 | G4cout <<"*******************" << G4endl; |
---|
84 | |
---|
85 | return true; |
---|
86 | } |
---|
87 | */ |
---|
88 | |
---|
89 | int main() |
---|
90 | { |
---|
91 | |
---|
92 | // initialise random generator: |
---|
93 | CLHEP::RanluxEngine defaultEngine(1234567,4); |
---|
94 | CLHEP::HepRandom::setTheEngine(&defaultEngine); |
---|
95 | G4int seed = time(NULL); |
---|
96 | CLHEP::HepRandom::setTheSeed(seed); |
---|
97 | |
---|
98 | |
---|
99 | // testobj = Sphere |
---|
100 | G4Box w("Bigger Box",5,5,5); |
---|
101 | // G4double R = std::sqrt(25./pi); |
---|
102 | //G4Orb sol("Orb",R); |
---|
103 | |
---|
104 | // G4double R= std::sqrt(100./16./pi); |
---|
105 | // G4Tubs sol("Test Cyl",0.5*R,1.5*R,1.5*R,0,twopi); |
---|
106 | |
---|
107 | G4double R = std::sqrt(2.5); |
---|
108 | G4Trd sol("Test Trd", R,2*R, 2*R,R,std::sqrt(3.)*0.5*R); |
---|
109 | //Dx1,Dx2,Dy1,Dy2,Dz |
---|
110 | G4double exsurf = sol.GetSurfaceArea(); |
---|
111 | G4cout << "Exact result:"<< exsurf << G4endl; |
---|
112 | G4IntersectionSolid sol2("Box 2", &sol, &w); |
---|
113 | |
---|
114 | for(G4int N = 100000; N<=10000001; N *=10){ |
---|
115 | G4double scale; |
---|
116 | for(scale=2; scale>=0.00096; scale /=2){ |
---|
117 | G4double sum = 0; |
---|
118 | G4double std = 0; |
---|
119 | G4double s; |
---|
120 | G4double rep = 20; |
---|
121 | for(G4int p=0; p<rep;p++) |
---|
122 | { |
---|
123 | sol2.SetAreaStatistics(N); // Inside loop to force area |
---|
124 | sol2.SetAreaAccuracy(scale*R); // recomputation for calculating |
---|
125 | s = sol2.GetSurfaceArea(); // average result ... |
---|
126 | sum =sum+s; |
---|
127 | std =std+(exsurf-s)*(exsurf-s); |
---|
128 | } |
---|
129 | G4double avsurf = sum/rep; |
---|
130 | std = std::sqrt(std/(rep-1)); |
---|
131 | G4cout << "MC result: N= "<< N << " Average = "<< avsurf |
---|
132 | << " std= " << std << " scale = "<< scale << G4endl; |
---|
133 | } |
---|
134 | } |
---|
135 | return 0; |
---|
136 | } |
---|