It's evolution, baby.

git-svn-id: http://svn.drobilla.net/lad/machina@958 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 88 insertions, 0 deletions

diff --git a/src/engine/Evolver.cpp b/src/engine/Evolver.cpp
new file mode 100644
index 0000000..1d4decc
--- /dev/null
+++ b/src/engine/Evolver.cpp
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+/* This file is part of Machina.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ * 
+ * Machina is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any later
+ * version.
+ * 
+ * Machina is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <iostream>
+#include <eugene/core/Mutation.hpp>
+#include <eugene/core/HybridMutation.hpp>
+#include <eugene/core/TournamentSelection.hpp>
+#include <machina/Evolver.hpp>
+#include <machina/Mutation.hpp>
+#include <machina/Problem.hpp>
+
+using namespace std;
+using namespace Eugene;
+using namespace boost;
+
+namespace Machina {
+
+
+Evolver::Evolver(const string& target_midi, SharedPtr<Machine> seed)
+	: _problem(new Problem(target_midi, seed))
+	, _active_fitness(-FLT_MAX)
+{	
+	SharedPtr<Eugene::HybridMutation<Machine> > m(new HybridMutation<Machine>());
+	
+	m->append_mutation(1/7.0f, boost::shared_ptr< Eugene::Mutation<Machine> >(
+			new Mutation::Compress()));
+	m->append_mutation(1/7.0f, boost::shared_ptr< Eugene::Mutation<Machine> >(
+			new Mutation::AddNode()));
+	m->append_mutation(1/7.0f, boost::shared_ptr< Eugene::Mutation<Machine> >(
+			new Mutation::RemoveNode()));
+	m->append_mutation(1/7.0f, boost::shared_ptr< Eugene::Mutation<Machine> >(
+			new Mutation::AdjustNode()));
+	m->append_mutation(1/7.0f, boost::shared_ptr< Eugene::Mutation<Machine> >(
+			new Mutation::AddEdge()));
+	m->append_mutation(1/7.0f, boost::shared_ptr< Eugene::Mutation<Machine> >(
+			new Mutation::RemoveEdge()));
+	m->append_mutation(1/7.0f, boost::shared_ptr< Eugene::Mutation<Machine> >(
+			new Mutation::AdjustEdge()));
+
+	boost::shared_ptr< Selection<Machine> > s(new TournamentSelection<Machine>(_problem, 3, 0.8));
+	boost::shared_ptr< Crossover<Machine> > crossover;
+	_ga = SharedPtr<MachinaGA>(new MachinaGA(_problem, s, crossover, m, 10, 10, 2, 1.0, 0.0));
+}
+	
+
+void
+Evolver::seed(SharedPtr<Machine> parent)
+{
+	/*_best = SharedPtr<Machine>(new Machine(*parent.get()));
+	_best_fitness = _problem->fitness(*_best.get());*/
+	_problem->seed(parent);
+	_active_fitness = _problem->fitness(*parent.get());
+}
+	
+
+void
+Evolver::_run()
+{
+	float old_best = _ga->best_fitness();
+
+	while (true) {
+		_ga->iteration();
+
+		if (_ga->best_fitness() > old_best) {
+			_improvement = true;
+			old_best = _ga->best_fitness();
+			cout << "NEW BEST: " << old_best << endl;
+		}
+	}
+}
+
+
+} // namespace Machina
+