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 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)));
}
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 BarycenterPlacer::placeOneLevel(MultilevelGraph &MLG)
{
int level = MLG.getLevel();
while (MLG.getLevel() == level && MLG.getLastMerge() != nullptr)
{
placeOneNode(MLG);
}
}
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));
}
void ZeroPlacer::placeOneLevel(MultilevelGraph &MLG)
{
int level = MLG.getLevel();
while (MLG.getLevel() == level && MLG.getLastMerge() != 0)
{
placeOneNode(MLG);
}
}