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Gave rand a constructor that takes a seed value.

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This commit is contained in:
Davis King 2012-11-04 15:02:44 -05:00
parent 1b1cf7548c
commit 7f5a22c424
2 changed files with 38 additions and 11 deletions
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36
dlib/rand/rand_kernel_1.h
View File

@ -36,18 +36,15 @@ namespace dlib
rand(
)
{
// prime the generator a bit
for (int i = 0; i < 10000; ++i)
mt();
init();
}
max_val = 0xFFFFFF;
max_val *= 0x1000000;
max_val += 0xFFFFFF;
max_val += 0.01;
has_gaussian = false;
next_gaussian = 0;
rand (
const std::string& seed_value
)
{
init();
set_seed(seed_value);
}
virtual ~rand(
@ -234,6 +231,23 @@ namespace dlib
);
private:
void init()
{
// prime the generator a bit
for (int i = 0; i < 10000; ++i)
mt();
max_val = 0xFFFFFF;
max_val *= 0x1000000;
max_val += 0xFFFFFF;
max_val += 0.01;
has_gaussian = false;
next_gaussian = 0;
}
mt19937 mt;
std::string seed;

13
dlib/rand/rand_kernel_abstract.h
View File

@ -34,6 +34,19 @@ namespace dlib
- std::bad_alloc
!*/
rand (
const std::string& seed_value
);
/*!
ensures
- #*this is properly initialized
- #get_seed() == seed_value
- This version of the constructor is equivalent to using
the default constructor and then calling set_seed(seed_value)
throws
- std::bad_alloc
!*/
virtual ~rand(
);
/*!