From e19c643153b32983cfeb319356dbbc2f7798c4b7 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Thu, 6 Dec 2007 00:02:08 +0000
Subject: Rename uselessley verbose MachineMutation.[ch]pp

git-svn-id: http://svn.drobilla.net/lad/machina@953 a436a847-0d15-0410-975c-d299462d15a1
---
 src/engine/Mutation.cpp | 120 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 src/engine/Mutation.cpp

(limited to 'src/engine/Mutation.cpp')

diff --git a/src/engine/Mutation.cpp b/src/engine/Mutation.cpp
new file mode 100644
index 0000000..c861810
--- /dev/null
+++ b/src/engine/Mutation.cpp
@@ -0,0 +1,120 @@
+/* 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 <cstdlib>
+#include "machina/Edge.hpp"
+#include "machina/Machine.hpp"
+#include "machina/Mutation.hpp"
+#include "machina/ActionFactory.hpp"
+
+using namespace std;
+
+namespace Machina {
+namespace Mutation {
+
+
+void
+Compress::mutate(Machine& machine)
+{
+	// Trim disconnected nodes
+	for (Machine::Nodes::iterator i = machine.nodes().begin(); i != machine.nodes().end() ;) {
+		Machine::Nodes::iterator next = i;
+		++next;
+		
+		if ((*i)->edges().empty())
+			machine.remove_node(*i);
+
+		i = next;
+	}
+}
+
+
+void
+AddNode::mutate(Machine& machine)
+{
+	// Create random node
+	SharedPtr<Node> node(new Node(1.0));
+	uint8_t note = rand() % 128;
+	node->set_enter_action(ActionFactory::note_on(note));
+	node->set_exit_action(ActionFactory::note_off(note));
+	machine.add_node(node);
+	
+	// Add as a successor to some other random node
+	SharedPtr<Node> tail = machine.random_node();
+	if (tail && tail != node)
+		tail->add_edge(boost::shared_ptr<Edge>(new Edge(tail, node)));
+}
+
+
+void
+RemoveNode::mutate(Machine& machine)
+{
+	SharedPtr<Node> node = machine.random_node();
+	machine.remove_node(node);
+}
+
+	
+void
+AdjustNode::mutate(Machine& machine)
+{
+	SharedPtr<Node> node = machine.random_node();
+	if (node) {
+		SharedPtr<MidiAction> enter_action = PtrCast<MidiAction>(node->enter_action());
+		SharedPtr<MidiAction> exit_action  = PtrCast<MidiAction>(node->exit_action());
+		if (enter_action && exit_action) {
+			const uint8_t note = rand() % 128;
+			enter_action->event()[1] = note;
+			exit_action->event()[1] = note;
+		}
+		node->set_changed();
+	}
+}
+
+
+void
+AddEdge::mutate(Machine& machine)
+{
+	SharedPtr<Node> tail = machine.random_node();
+	SharedPtr<Node> head = machine.random_node();
+
+	if (tail && head && tail != head && !tail->connected_to(head))
+		tail->add_edge(boost::shared_ptr<Edge>(new Edge(tail, head)));
+}
+
+
+void
+RemoveEdge::mutate(Machine& machine)
+{
+	SharedPtr<Node> tail = machine.random_node();
+	if (tail)
+		tail->remove_edge(tail->random_edge());
+}
+
+	
+void
+AdjustEdge::mutate(Machine& machine)
+{
+	SharedPtr<Edge> edge = machine.random_edge();
+	if (edge)
+		edge->set_probability(rand() / (float)RAND_MAX);
+}
+
+
+} // namespace Mutation
+} // namespace Machina
+
-- 
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