void RandomPlacer::placeOneLevel(MultilevelGraph &MLG)
{
int level = MLG.getLevel();
DPoint center(0.0, 0.0);
double radius = 0.0;
Graph &G = MLG.getGraph();
double n = G.numberOfNodes();
if (n > 0) {
for(node v : G.nodes) {
center = center + DPoint( MLG.x(v), MLG.y(v) );
}
center = DPoint(center.m_x / n, center.m_y / n);
for(node v : G.nodes) {
double r = sqrt( MLG.x(v) * MLG.x(v) + MLG.y(v) * MLG.y(v) );
if (r > radius) radius = r;
}
radius *= m_circleSizeFactor;
} else {
radius = 10.0 * m_circleSizeFactor;
}
while (MLG.getLevel() == level && MLG.getLastMerge() != nullptr)
{
placeOneNode(MLG, center, radius);
}
}
void RandomPlacer::placeOneNode(MultilevelGraph &MLG, DPoint center, double radius)
{
node merged = MLG.undoLastMerge();
float angle = (float)randomDouble(0.0, 2 * Math::pi);
float randRadius = float(sqrt(randomDouble(0.0, radius * radius)));
MLG.x(merged, cos(angle) * randRadius + ((m_randomOffset)?(float)randomDouble(-1.0, 1.0):0.f));
MLG.y(merged, sin(angle) * randRadius + ((m_randomOffset)?(float)randomDouble(-1.0, 1.0):0.f));
}
void ZeroPlacer::placeOneLevel(MultilevelGraph &MLG)
{
int level = MLG.getLevel();
while (MLG.getLevel() == level && MLG.getLastMerge() != 0)
{
placeOneNode(MLG);
}
}
void BarycenterPlacer::placeOneLevel(MultilevelGraph &MLG)
{
int level = MLG.getLevel();
while (MLG.getLevel() == level && MLG.getLastMerge() != nullptr)
{
placeOneNode(MLG);
}
}
void MedianPlacer::placeOneNode(MultilevelGraph &MLG)
{
node merged = MLG.undoLastMerge();
int i = 0;
std::vector<double> xVector;
std::vector<double> yVector;
adjEntry adj;
forall_adj(adj, merged) {
i++;
xVector.push_back(MLG.x(adj->twinNode()));
yVector.push_back(MLG.y(adj->twinNode()));
}
void RandomPlacer::placeOneLevel(MultilevelGraph &MLG)
{
int level = MLG.getLevel();
DPoint center(0.0, 0.0);
double radius = 0.0;
Graph &G = MLG.getGraph();
double n = G.numberOfNodes();
if (n > 0) {
node v;
forall_nodes(v, G) {
center = center + DPoint( MLG.x(v), MLG.y(v) );
}
void MultilevelGraph::reInsertGraph(MultilevelGraph &MLG)
{
std::map<node, node> tempNodeAssociations;
for(node v : MLG.m_G->nodes) {
MLG.copyNodeTo(v, *this, tempNodeAssociations, false, MLG.m_nodeAssociations[v]);
}
for(edge e : MLG.m_G->edges) {
MLG.copyEdgeTo(e, *this, tempNodeAssociations, false, MLG.m_edgeAssociations[e]);
}
initReverseIndizes();
}
void BarycenterPlacer::placeOneNode(MultilevelGraph &MLG)
{
node merged = MLG.undoLastMerge();
double x = 0.0;
double y = 0.0;
double i = 0.0;
for(adjEntry adj : merged->adjEdges) {
if(m_weightedPositions) {
double weight = 1.0 / MLG.weight(adj->theEdge());
i = i + weight;
x += MLG.x(adj->twinNode()) * weight;
y += MLG.y(adj->twinNode()) * weight;
} else {
i = i + 1.f;
x += MLG.x(adj->twinNode());
y += MLG.y(adj->twinNode());
}
}
OGDF_ASSERT(i > 0);
x = x / i;
y = y / i;
MLG.x(merged, x + ((m_randomOffset)?(float)randomDouble(-1.0, 1.0):0.f));
MLG.y(merged, y + ((m_randomOffset)?(float)randomDouble(-1.0, 1.0):0.f));
}
void CirclePlacer::placeOneLevel(MultilevelGraph &MLG)
{
int level = MLG.getLevel();
DPoint center(0.0, 0.0);
float radius = 0.0;
std::map<node, bool> oldNodes;
Graph &G = MLG.getGraph();
double n = G.numberOfNodes();
if (n > 0) {
node v;
forall_nodes(v, G) {
oldNodes[v] = true;
center = center + DPoint( MLG.x(v), MLG.y(v) );
}
void IndependentSetMerger::buildAllLevels(MultilevelGraph &MLG)
{
m_numLevels = 1;
MLG.updateReverseIndizes();
std::vector< std::vector<node> > levelNodes;
Graph &G = MLG.getGraph();
// calc MIS
NodeArray<bool> nodeMarks(G, false);
std::vector<node> IScandidates;
node v;
forall_nodes(v, G) {
IScandidates.push_back(v);
}
void ModularMultilevelMixer::call(MultilevelGraph &MLG)
{
const Graph &G = MLG.getGraph();
m_errorCode = ercNone;
clock_t time = clock();
if ((m_multilevelBuilder.valid() == false || m_initialPlacement.valid() == false) && m_oneLevelLayoutModule.valid() == false) {
OGDF_THROW(AlgorithmFailureException);
}
if (m_fixedEdgeLength > 0.0) {
edge e;
forall_edges(e,G) {
MLG.weight(e, m_fixedEdgeLength);
}
void MultilevelGraph::copyNodeTo(node v, MultilevelGraph &MLG, std::map<node, node> &tempNodeAssociations, bool associate, int index)
{
node v_new;
if (index == -1) {
v_new = MLG.m_G->newNode();
} else {
v_new = MLG.m_G->newNode(index);
}
tempNodeAssociations[v] = v_new;
if(associate) {
MLG.m_nodeAssociations[v_new] = v->index();
}
MLG.m_radius[v_new] = m_radius[v];
MLG.x(v_new, x(v));
MLG.y(v_new, y(v));
}
bool RandomMerger::buildOneLevel(MultilevelGraph &MLG)
{
Graph &G = MLG.getGraph();
int level = MLG.getLevel() + 1;
int numNodes = G.numberOfNodes();
if (numNodes <= 3) {
return false;
}
node v;
int index = 0;
Array<node> candidates(numNodes);
forall_nodes(v, G) {
candidates[index] = v;
index++;
}
MultilevelGraph * MultilevelGraph::removeOneCC(std::vector<node> &componentSubArray)
{
MultilevelGraph * MLGcomponent = new MultilevelGraph();
std::map<node, node> tempNodeAssociations;
// copy nodes
for (node v : componentSubArray) {
copyNodeTo(v, *MLGcomponent, tempNodeAssociations, true);
}
// move edges
for (node v : componentSubArray) {
#if 0
std::vector<edge> toDelete;
#endif
for(adjEntry adj : v->adjEntries) {
edge e = adj->theEdge();
if (e->source() == v) {
copyEdgeTo(e, *MLGcomponent, tempNodeAssociations, true);
#if 0
toDelete.push_back(e);
#endif
}
}
#if 0
// Test if this is good for Performace.
// makes Assert Edges == 0 fail!
// Because of self loops!
for(std::vector<edge>::iterator j = toDelete.begin(); j != toDelete.end(); j++) {
m_G->delEdge(*j);
}
#endif
}
tempNodeAssociations.clear();
// delete nodes
for (node v : componentSubArray) {
m_G->delNode(v);
}
MLGcomponent->initReverseIndizes();
return MLGcomponent;
}
void ZeroPlacer::placeOneNode(MultilevelGraph &MLG)
{
NodeMerge * NM = MLG.getLastMerge();
node parent = MLG.getNode(NM->m_changedNodes[0]);
node merged = MLG.undoLastMerge();
MLG.x(merged, MLG.x(parent) + ((m_randomOffset)?(float)randomDouble(-m_randomRange, m_randomRange):0.f));
MLG.y(merged, MLG.y(parent) + ((m_randomOffset)?(float)randomDouble(-m_randomRange, m_randomRange):0.f));
}
std::vector<node> SolarMerger::selectSuns(MultilevelGraph &MLG)
{
Graph &G = MLG.getGraph();
std::vector<node> suns;
std::vector<node> candidates;
node v;
forall_nodes(v, G) {
candidates.push_back(v);
}
bool RandomMerger::buildOneLevel(MultilevelGraph &MLG)
{
Graph &G = MLG.getGraph();
int level = MLG.getLevel() + 1;
int numNodes = G.numberOfNodes();
if (numNodes <= 3) {
return false;
}
int index = 0;
Array<node> candidates(numNodes);
for(node v : G.nodes) {
candidates[index] = v;
index++;
}
int candSize = candidates.size();
while (candSize > numNodes / m_levelSizeFactor)
{
index = randomNumber(0, candSize-1);
node mergeNode = candidates[index];
candidates[index] = candidates[candSize-1];
candSize--;
node parent = nullptr;
if (mergeNode->degree() > 0) {
int index = randomNumber(0, mergeNode->degree()-1);
int i = 0;
for(adjEntry adj : mergeNode->adjEntries) {
if (i == index) {
parent = adj->twinNode();
break;
} else {
i++;
}
}
} else {
do {
index = randomNumber(0, candSize-1);
parent = candidates[index];
} while (parent == mergeNode);
candidates[index] = candidates[candSize-1];
candSize--;
}
NodeMerge * NM = new NodeMerge(level);
bool ret = MLG.changeNode(NM, parent, MLG.radius(parent), mergeNode);
OGDF_ASSERT( ret );
MLG.moveEdgesToParent(NM, mergeNode, parent, true, m_adjustEdgeLengths);
ret = MLG.postMerge(NM, mergeNode);
if( !ret ) {
delete NM;
}
}
return true;
}
bool MatchingMerger::buildOneLevel(MultilevelGraph &MLG)
{
Graph &G = MLG.getGraph();
int level = MLG.getLevel() + 1;
int numNodes = G.numberOfNodes();
if (level == 1 && m_selectByMass) {
m_mass.init(G, 1);
}
if (numNodes <= 3) {
return false;
}
NodeArray<bool> nodeMarks(G, false);
std::vector<edge> matching;
std::vector<node> candidates;
node v;
forall_nodes(v, G) {
candidates.push_back(v);
}
bool MatchingMerger::buildOneLevel(MultilevelGraph &MLG)
{
Graph &G = MLG.getGraph();
int level = MLG.getLevel() + 1;
int numNodes = G.numberOfNodes();
if (level == 1 && m_selectByMass) {
m_mass.init(G, 1);
}
if (numNodes <= 3) {
return false;
}
NodeArray<bool> nodeMarks(G, false);
std::vector<edge> matching;
std::vector<node> candidates;
for(node v : G.nodes) {
candidates.push_back(v);
}
while (!candidates.empty())
{
int rndIndex = randomNumber(0, (int)candidates.size()-1);
node one = candidates[rndIndex];
candidates[rndIndex] = candidates.back();
candidates.pop_back();
if (nodeMarks[one]) {
continue;
}
nodeMarks[one] = true;
std::vector<node> candNeighbors;
std::vector<edge> candEdges;
unsigned int minMass = numeric_limits<unsigned int>::max();
for(adjEntry adj : one->adjEntries) {
node cand = adj->twinNode();
if (!nodeMarks[cand] && (!m_selectByMass || m_mass[cand] <= minMass))
{
if (m_selectByMass && m_mass[cand] < minMass) {
minMass = m_mass[cand];
candNeighbors.clear();
candEdges.clear();
}
candNeighbors.push_back(cand);
candEdges.push_back(adj->theEdge());
}
}
if (candNeighbors.empty()) {
continue;
}
int index = randomNumber(0, int(candNeighbors.size())-1);
nodeMarks[candNeighbors[index]] = true;
matching.push_back(candEdges[index]);
}
while (!matching.empty()) {
edge matchingEdge = matching.back();
matching.pop_back();
node mergeNode;
node parent;
// choose high degree node as parent!
mergeNode = matchingEdge->source();
parent = matchingEdge->target();
if (mergeNode->degree() > parent->degree()) {
mergeNode = matchingEdge->target();
parent = matchingEdge->source();
}
NodeMerge * NM = new NodeMerge(level);
bool ret = MLG.changeNode(NM, parent, MLG.radius(parent), mergeNode);
OGDF_ASSERT( ret );
if (m_selectByMass) {
m_mass[parent] = m_mass[parent] + m_mass[mergeNode];
}
MLG.moveEdgesToParent(NM, mergeNode, parent, true, m_adjustEdgeLengths);
ret = MLG.postMerge(NM, mergeNode);
if( !ret ) {
delete NM;
}
}
return true;
}
void SolarPlacer::placeOneNode(MultilevelGraph &MLG)
{
NodeMerge * lastNM = MLG.getLastMerge();
double x = 0.0;
double y = 0.0;
int i = 0;
node sun = MLG.getNode(lastNM->m_changedNodes.front());
std::vector< std::pair<int, double> > positions = lastNM->m_position;
node merged = MLG.undoLastMerge();
if (positions.size() > 0) {
for (const std::pair<int, double> &p : positions) {
double factor = p.second;
node other_sun = MLG.getNode(p.first);
i++;
x += MLG.x(sun) * factor + MLG.x(other_sun) * (1.0f-factor);
y += MLG.y(sun) * factor + MLG.y(other_sun) * (1.0f-factor);
}
} else {
i++;
x += MLG.x(sun);
y += MLG.y(sun);
}
OGDF_ASSERT(i > 0);
if (positions.size() == 0 || m_randomOffset) {
x += randomDouble(-1.0, 1.0);
y += randomDouble(-1.0, 1.0);
}
MLG.x(merged, (x / static_cast<double>(i)));
MLG.y(merged, (y / static_cast<double>(i)));
}
void FastMultipoleEmbedder::call(MultilevelGraph &MLG)
{
Graph &G = MLG.getGraph();
call(G, MLG.getXArray(), MLG.getYArray(), MLG.getWArray(), MLG.getRArray());
}
void SolarPlacer::placeOneNode(MultilevelGraph &MLG)
{
NodeMerge * lastNM = MLG.getLastMerge();
float x = 0.0;
float y = 0.0;
int i = 0;
node sun = MLG.getNode(lastNM->m_changedNodes.front());
std::vector< std::pair<int, float> > positions = lastNM->m_position;
node merged = MLG.undoLastMerge();
if (positions.size() > 0) {
for (std::vector< std::pair<int, float> >::iterator j = positions.begin(); j != positions.end(); j++) {
float factor = (*j).second;
node other_sun = MLG.getNode((*j).first);
i++;
x += MLG.x(sun) * factor + MLG.x(other_sun) * (1.0f-factor);
y += MLG.y(sun) * factor + MLG.y(other_sun) * (1.0f-factor);
}
} else {
i++;
x += MLG.x(sun);
y += MLG.y(sun);
}
OGDF_ASSERT(i > 0);
if (positions.size() == 0 || m_randomOffset) {
x += (float)randomDouble(-1.0, 1.0);
y += (float)randomDouble(-1.0, 1.0);
}
MLG.x(merged, (x / static_cast<float>(i)));
MLG.y(merged, (y / static_cast<float>(i)));
}