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Diffstat (limited to 'src/engine/Mutation.cpp')
| -rw-r--r-- | src/engine/Mutation.cpp | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/src/engine/Mutation.cpp b/src/engine/Mutation.cpp new file mode 100644 index 0000000..776142d --- /dev/null +++ b/src/engine/Mutation.cpp @@ -0,0 +1,190 @@ +/* + This file is part of Machina. + Copyright 2007-2013 David 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 3 of the License, or 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 more details. + + You should have received a copy of the GNU General Public License + along with Machina. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <iostream> +#include <cstdlib> + +#include "machina/Machine.hpp" +#include "machina/Mutation.hpp" + +#include "ActionFactory.hpp" +#include "Edge.hpp" +#include "MidiAction.hpp" + +using namespace std; + +namespace machina { +namespace Mutation { + +void +Compress::mutate(Random& rng, Machine& machine) +{ + //cout << "COMPRESS" << endl; + + // 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(Random& rng, Machine& machine) +{ + //cout << "ADD NODE" << endl; + + // Create random node + SPtr<Node> node(new Node(machine.time().unit())); + node->set_selector(true); + + SPtr<Node> note_node = machine.random_node(); + if (!note_node) { + return; + } + + uint8_t note = rand() % 128; + + SPtr<MidiAction> enter_action = dynamic_ptr_cast<MidiAction>( + note_node->enter_action()); + if (enter_action) { + note = enter_action->event()[1]; + } + + node->set_enter_action(ActionFactory::note_on(note)); + node->set_exit_action(ActionFactory::note_off(note)); + machine.add_node(node); + + // Insert after some node + SPtr<Node> tail = machine.random_node(); + if (tail && (tail != node) /* && !node->connected_to(tail)*/) { + tail->add_edge(SPtr<Edge>(new Edge(tail, node))); + } + + // Insert before some other node + SPtr<Node> head = machine.random_node(); + if (head && (head != node) /* && !head->connected_to(node)*/) { + node->add_edge(SPtr<Edge>(new Edge(node, head))); + } +} + +void +RemoveNode::mutate(Random& rng, Machine& machine) +{ + //cout << "REMOVE NODE" << endl; + + SPtr<Node> node = machine.random_node(); + if (node && !node->is_initial()) { + machine.remove_node(node); + } +} + +void +AdjustNode::mutate(Random& rng, Machine& machine) +{ + //cout << "ADJUST NODE" << endl; + + SPtr<Node> node = machine.random_node(); + if (node) { + SPtr<MidiAction> enter_action = dynamic_ptr_cast<MidiAction>( + node->enter_action()); + SPtr<MidiAction> exit_action = dynamic_ptr_cast<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 +SwapNodes::mutate(Random& rng, Machine& machine) +{ + //cout << "SWAP NODE" << endl; + + if (machine.nodes().size() <= 1) { + return; + } + + SPtr<Node> a = machine.random_node(); + SPtr<Node> b = machine.random_node(); + while (b == a) { + b = machine.random_node(); + } + + SPtr<MidiAction> a_enter = dynamic_ptr_cast<MidiAction>(a->enter_action()); + SPtr<MidiAction> a_exit = dynamic_ptr_cast<MidiAction>(a->exit_action()); + SPtr<MidiAction> b_enter = dynamic_ptr_cast<MidiAction>(b->enter_action()); + SPtr<MidiAction> b_exit = dynamic_ptr_cast<MidiAction>(b->exit_action()); + + uint8_t note_a = a_enter->event()[1]; + uint8_t note_b = b_enter->event()[1]; + + a_enter->event()[1] = note_b; + a_exit->event()[1] = note_b; + b_enter->event()[1] = note_a; + b_exit->event()[1] = note_a; +} + +void +AddEdge::mutate(Random& rng, Machine& machine) +{ + //cout << "ADJUST EDGE" << endl; + + SPtr<Node> tail = machine.random_node(); + SPtr<Node> head = machine.random_node(); + + if (tail && head && tail != head) { + // && !tail->connected_to(head) && !head->connected_to(tail) + SPtr<Edge> edge(new Edge(tail, head)); + edge->set_probability(rand() / (float)RAND_MAX); + tail->add_edge(SPtr<Edge>(new Edge(tail, head))); + } +} + +void +RemoveEdge::mutate(Random& rng, Machine& machine) +{ + //cout << "REMOVE EDGE" << endl; + + SPtr<Node> tail = machine.random_node(); + if (tail && !(tail->is_initial() && tail->edges().size() == 1)) { + tail->remove_edge(tail->random_edge()); + } +} + +void +AdjustEdge::mutate(Random& rng, Machine& machine) +{ + //cout << "ADJUST EDGE" << endl; + + SPtr<Edge> edge = machine.random_edge(); + if (edge) { + edge->set_probability(rand() / (float)RAND_MAX); + edge->tail().lock()->edges_changed(); + } +} + +} // namespace Mutation +} // namespace machina |