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| 53 | // cool random number generator (using the mersenne-twister) by http://www-personal.umich.edu/~wagnerr/MersenneTwister.html
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53 | // cool random number generator (using the mersenne-twister) by http://www-personal.umich.edu/~wagnerr/MersenneTwister.html
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| 54 | #include "../3rdparty/MersenneTwister.h"
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54 | #include "../3rdparty/MersenneTwister.h"
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| 55 | // access the Mersenne-Twister-Random-Numbers
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55 | // access the Mersenne-Twister-Random-Numbers
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| 56 | MTRand &mtRand(); // static object lives in globalsettings |
56 | MTRand &mtRand(); // static object lives in globalsettings |
| 57 | /// nrandom returns a random number from [p1, p2]
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| - | 57 | /// nrandom returns a random number from [p1, p2] -> p2 is a possible result!
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| 58 | inline double nrandom(const double& p1, const double& p2) |
58 | inline double nrandom(const double& p1, const double& p2) |
| 59 | {
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59 | {
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| 60 | return p1 + mtRand().rand(p2-p1); |
60 | return p1 + mtRand().rand(p2-p1); |
| 61 | //return p1 + (p2-p1)*(rand()/double(RAND_MAX));
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61 | //return p1 + (p2-p1)*(rand()/double(RAND_MAX));
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| 62 | }
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62 | }
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| 63 | /// returns a random number in [0,1]
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| - | 63 | /// returns a random number in [0,1] (i.e.="1" is a possible result!)
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| 64 | inline double drandom() |
64 | inline double drandom() |
| 65 | {
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65 | {
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| 66 | return mtRand().rand(); |
66 | return mtRand().rand(); |
| 67 | //return rand()/double(RAND_MAX);
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67 | //return rand()/double(RAND_MAX);
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| 68 | }
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68 | }
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| - | 69 | /// return a random number from "from" to "to" (incl.), i.e. irandom(3,5) results in 3, 4 or 5.
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| 69 | inline int irandom(int from, int to) |
70 | inline int irandom(int from, int to) |
| 70 | {
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71 | {
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| 71 | return from + mtRand().randInt(to-from); |
72 | return from + mtRand().randInt(to-from); |
| 72 | //return from + rand()%(to-from);
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73 | //return from + rand()%(to-from);
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| 73 | }
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74 | }
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