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openscad
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clarify that its not nondeterministic, we are supporting older systems 

where the C++/boost random_device stuff doesn't work.
boost random_device in particular has a lot of issues with old versions
not working, with -lboost_random not being installed by default, etc,
that complicate the build too much.
felipesanches-svg
don bright 2013-01-06 11:06:55 -06:00
parent 8aa349b15f
commit 3825a72499
1 changed files with 10 additions and 4 deletions
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14
src/func.cc
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@ -34,6 +34,14 @@
#include <algorithm>
#include "stl-utils.h"
#include "printutils.h"
/*
Random numbers
Newer versions of boost/C++ include a non-deterministic random_device and
auto/bind()s for random function objects, but we are supporting older systems.
*/
#include <boost/random/mersenne_twister.hpp>
#include <boost/random/uniform_real_distribution.hpp>
@ -47,9 +55,7 @@ int process_id = getpid();
#endif
boost::random::mt19937 deterministic_rng;
// this is technically not non-deterministic, but boost::random::random_device
// has non-header library and/or version issues that would complicate the build
boost::random::mt19937 nondeterministic_rng( std::time(0) + process_id );
boost::random::mt19937 lessdeterministic_rng( std::time(0) + process_id );
AbstractFunction::~AbstractFunction()
{
@ -177,7 +183,7 @@ Value builtin_rands(const Context *, const std::vector<std::string>&, const std:
if ( deterministic ) {
vec.push_back( Value( distributor( deterministic_rng ) ) );
} else {
vec.push_back( Value( distributor( nondeterministic_rng ) ) );
vec.push_back( Value( distributor( lessdeterministic_rng ) ) );
}
}