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d88f97cc | 1 | #include "Ali4Vector.h" |
2 | ||
3 | ClassImp(Ali4Vector) // Class implementation to enable ROOT I/O | |
4 | ||
5 | Ali4Vector::Ali4Vector() | |
6 | { | |
7 | // Creation of a contravariant 4-vector and initialisation of parameters | |
8 | fV0=0; | |
9 | Double_t a[3]={0,0,0}; | |
10 | fV.SetVector(a,"sph"); | |
11 | } | |
12 | /////////////////////////////////////////////////////////////////////////// | |
13 | Ali4Vector::~Ali4Vector() | |
14 | { | |
15 | // Destructor to delete dynamically allocated memory | |
16 | } | |
17 | /////////////////////////////////////////////////////////////////////////// | |
18 | void Ali4Vector::SetVector(Double_t v0,Ali3Vector v) | |
19 | { | |
20 | // Store contravariant vector | |
21 | fV0=v0; | |
22 | fV=v; | |
23 | } | |
24 | /////////////////////////////////////////////////////////////////////////// | |
25 | void Ali4Vector::SetVector(Double_t* v,TString f) | |
26 | { | |
27 | // Store vector according to reference frame f | |
28 | fV0=v[0]; | |
29 | Double_t a[3]; | |
30 | for (Int_t i=0; i<3; i++) | |
31 | { | |
32 | a[i]=v[i+1]; | |
33 | } | |
34 | fV.SetVector(a,f); | |
35 | } | |
36 | /////////////////////////////////////////////////////////////////////////// | |
37 | void Ali4Vector::GetVector(Double_t* v,TString f) | |
38 | { | |
39 | // Provide vector according to reference frame f | |
40 | v[0]=fV0; | |
41 | Double_t a[3]; | |
42 | fV.GetVector(a,f); | |
43 | for (Int_t i=0; i<3; i++) | |
44 | { | |
45 | v[i+1]=a[i]; | |
46 | } | |
47 | } | |
48 | /////////////////////////////////////////////////////////////////////////// | |
49 | void Ali4Vector::SetVector(Float_t* v,TString f) | |
50 | { | |
51 | // Store vector according to reference frame f | |
52 | Double_t vec[4]; | |
53 | for (Int_t i=0; i<4; i++) | |
54 | { | |
55 | vec[i]=v[i]; | |
56 | } | |
57 | SetVector(vec,f); | |
58 | } | |
59 | /////////////////////////////////////////////////////////////////////////// | |
60 | void Ali4Vector::GetVector(Float_t* v,TString f) | |
61 | { | |
62 | // Provide vector according to reference frame f | |
63 | Double_t vec[4]; | |
64 | GetVector(vec,f); | |
65 | for (Int_t i=0; i<4; i++) | |
66 | { | |
67 | v[i]=vec[i]; | |
68 | } | |
69 | } | |
70 | /////////////////////////////////////////////////////////////////////////// | |
71 | Double_t Ali4Vector::GetScalar() | |
72 | { | |
73 | // Provide the scalar part | |
74 | return fV0; | |
75 | } | |
76 | /////////////////////////////////////////////////////////////////////////// | |
77 | Ali3Vector Ali4Vector::Get3Vector() | |
78 | { | |
79 | // Provide the 3-vector part | |
80 | return fV; | |
81 | } | |
82 | /////////////////////////////////////////////////////////////////////////// | |
83 | void Ali4Vector::Info(TString f) | |
84 | { | |
85 | // Print contravariant vector components according to reference frame f | |
86 | if (f=="car" || f=="sph" || f=="cyl") | |
87 | { | |
88 | Double_t vec[4]; | |
89 | GetVector(vec,f); | |
90 | cout << " Contravariant vector in " << f << " coordinates : " | |
91 | << vec[0] << " " << vec[1] << " " << vec[2] << " " << vec[3] << endl; | |
92 | } | |
93 | else | |
94 | { | |
95 | cout << " *Ali4Vector::Info* Unsupported frame : " << f << endl | |
96 | << " Possible frames are 'car', 'sph' and 'cyl'." << endl; | |
97 | } | |
98 | } | |
99 | /////////////////////////////////////////////////////////////////////////// | |
100 | Double_t Ali4Vector::Dot(Ali4Vector& q) | |
101 | { | |
102 | // Provide the dot product of the current vector with vector q | |
103 | Double_t a[4],b[4]; | |
104 | Double_t dotpro; | |
105 | ||
106 | GetVector(a,"car"); | |
107 | q.GetVector(b,"car"); | |
108 | ||
109 | dotpro=a[0]*b[0]; | |
110 | for (Int_t i=1; i<4; i++) | |
111 | { | |
112 | dotpro-=a[i]*b[i]; | |
113 | } | |
114 | ||
115 | return dotpro; | |
116 | } | |
117 | /////////////////////////////////////////////////////////////////////////// | |
118 | Ali4Vector Ali4Vector::operator+(Ali4Vector& q) | |
119 | { | |
120 | // Add vector q to the current vector | |
121 | Double_t a[4],b[4]; | |
122 | ||
123 | GetVector(a,"car"); | |
124 | q.GetVector(b,"car"); | |
125 | ||
126 | for (Int_t i=0; i<4; i++) | |
127 | { | |
128 | a[i]+=b[i]; | |
129 | } | |
130 | ||
131 | Ali4Vector v; | |
132 | v.SetVector(a,"car"); | |
133 | ||
134 | return v; | |
135 | } | |
136 | /////////////////////////////////////////////////////////////////////////// | |
137 | Ali4Vector Ali4Vector::operator-(Ali4Vector& q) | |
138 | { | |
139 | // Subtract vector q from the current vector | |
140 | Double_t a[4],b[4]; | |
141 | ||
142 | GetVector(a,"car"); | |
143 | q.GetVector(b,"car"); | |
144 | ||
145 | for (Int_t i=0; i<4; i++) | |
146 | { | |
147 | a[i]-=b[i]; | |
148 | } | |
149 | ||
150 | Ali4Vector v; | |
151 | v.SetVector(a,"car"); | |
152 | ||
153 | return v; | |
154 | } | |
155 | /////////////////////////////////////////////////////////////////////////// | |
156 | Ali4Vector Ali4Vector::operator*(Double_t s) | |
157 | { | |
158 | // Multiply the current vector with a scalar s | |
159 | Double_t a[4]; | |
160 | ||
161 | GetVector(a,"car"); | |
162 | ||
163 | for (Int_t i=0; i<4; i++) | |
164 | { | |
165 | a[i]*=s; | |
166 | } | |
167 | ||
168 | Ali4Vector v; | |
169 | v.SetVector(a,"car"); | |
170 | ||
171 | return v; | |
172 | } | |
173 | /////////////////////////////////////////////////////////////////////////// | |
174 | Ali4Vector Ali4Vector::operator/(Double_t s) | |
175 | { | |
176 | // Divide the current vector by a scalar s | |
177 | ||
178 | if (fabs(s)<1.e-20) // Protect against division by 0 | |
179 | { | |
180 | cout << " *Ali4Vector::/* Division by 0 detected. No action taken." << endl; | |
181 | return *this; | |
182 | } | |
183 | else | |
184 | { | |
185 | Double_t a[4]; | |
186 | ||
187 | GetVector(a,"car"); | |
188 | ||
189 | for (Int_t i=0; i<4; i++) | |
190 | { | |
191 | a[i]/=s; | |
192 | } | |
193 | ||
194 | Ali4Vector v; | |
195 | v.SetVector(a,"car"); | |
196 | ||
197 | return v; | |
198 | } | |
199 | } | |
200 | /////////////////////////////////////////////////////////////////////////// | |
201 | Ali4Vector& Ali4Vector::operator+=(Ali4Vector& q) | |
202 | { | |
203 | // Add vector q to the current vector | |
204 | Double_t a[4],b[4]; | |
205 | ||
206 | GetVector(a,"car"); | |
207 | q.GetVector(b,"car"); | |
208 | ||
209 | for (Int_t i=0; i<4; i++) | |
210 | { | |
211 | a[i]+=b[i]; | |
212 | } | |
213 | ||
214 | SetVector(a,"car"); | |
215 | ||
216 | return *this; | |
217 | } | |
218 | /////////////////////////////////////////////////////////////////////////// | |
219 | Ali4Vector& Ali4Vector::operator-=(Ali4Vector& q) | |
220 | { | |
221 | // Subtract vector q from the current vector | |
222 | Double_t a[4],b[4]; | |
223 | ||
224 | GetVector(a,"car"); | |
225 | q.GetVector(b,"car"); | |
226 | ||
227 | for (Int_t i=0; i<4; i++) | |
228 | { | |
229 | a[i]-=b[i]; | |
230 | } | |
231 | ||
232 | SetVector(a,"car"); | |
233 | ||
234 | return *this; | |
235 | } | |
236 | /////////////////////////////////////////////////////////////////////////// | |
237 | Ali4Vector& Ali4Vector::operator*=(Double_t s) | |
238 | { | |
239 | // Multiply the current vector with a scalar s | |
240 | Double_t a[4]; | |
241 | ||
242 | GetVector(a,"car"); | |
243 | ||
244 | for (Int_t i=0; i<4; i++) | |
245 | { | |
246 | a[i]*=s; | |
247 | } | |
248 | ||
249 | SetVector(a,"car"); | |
250 | ||
251 | return *this; | |
252 | } | |
253 | /////////////////////////////////////////////////////////////////////////// | |
254 | Ali4Vector& Ali4Vector::operator/=(Double_t s) | |
255 | { | |
256 | // Divide the current vector by a scalar s | |
257 | ||
258 | if (fabs(s)<1.e-20) // Protect against division by 0 | |
259 | { | |
260 | cout << " *Ali4Vector::/=* Division by 0 detected. No action taken." << endl; | |
261 | return *this; | |
262 | } | |
263 | else | |
264 | { | |
265 | Double_t a[4]; | |
266 | ||
267 | GetVector(a,"car"); | |
268 | ||
269 | for (Int_t i=0; i<4; i++) | |
270 | { | |
271 | a[i]/=s; | |
272 | } | |
273 | ||
274 | SetVector(a,"car"); | |
275 | ||
276 | return *this; | |
277 | } | |
278 | } | |
279 | /////////////////////////////////////////////////////////////////////////// |