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added adaptive factor to force convergence of network graph

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git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@6264 b45a01b8-16f6-495d-af2f-9b41ad6348cc
This commit is contained in:
csoler 2013-03-21 20:19:43 +00:00
parent b913c8ae4f
commit ff5fde090c
3 changed files with 12 additions and 7 deletions
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10
retroshare-gui/src/gui/elastic/graphwidget.cpp
View File

@ -134,6 +134,7 @@ GraphWidget::GraphWidget(QWidget *)
setRenderHint(QPainter::Antialiasing);
setTransformationAnchor(AnchorUnderMouse);
setResizeAnchor(AnchorViewCenter);
_friction_factor = 1.0f ;
@ -158,6 +159,7 @@ void GraphWidget::clearGraph()
scene()->setSceneRect(-200, -200, 1000, 1000);
_edges.clear();
_nodes.clear();
_friction_factor = 1.0f ;
}
GraphWidget::NodeId GraphWidget::addNode(const std::string& node_short_string,const std::string& node_complete_string,NodeType type,AuthType auth,const std::string& ssl_id,const std::string& gpg_id)
@ -220,6 +222,7 @@ void GraphWidget::itemMoved()
std::cout << "starting timer" << std::endl;
#endif
timerId = startTimer(1000 / 25); // hit timer 25 times per second.
_friction_factor = 1.0f ;
}
}
@ -342,15 +345,13 @@ void GraphWidget::timerEvent(QTimerEvent *event)
convolveWithGaussian(forceMap,S,20) ;
}
static float speedf=1.0f;
foreach (Node *node, _nodes)
{
QPointF pos = node->mapToScene(QPointF(0,0)) ;
float x = S*(pos.x()-R.left())/R.width() ;
float y = S*(pos.y()-R.top())/R.height() ;
node->calculateForces(forceMap,R.width(),R.height(),S,S,x,y,speedf);
node->calculateForces(forceMap,R.width(),R.height(),S,S,x,y,_friction_factor);
}
bool itemsMoved = false;
@ -365,6 +366,8 @@ void GraphWidget::timerEvent(QTimerEvent *event)
#endif
timerId = 0;
}
_friction_factor *= 1.001f ;
// std::cerr << "Friction factor = " << _friction_factor << std::endl;
}
void GraphWidget::setEdgeLength(uint32_t l)
@ -377,6 +380,7 @@ void GraphWidget::setEdgeLength(uint32_t l)
std::cout << "starting timer" << std::endl;
#endif
timerId = startTimer(1000 / 25);
_friction_factor = 1.0f ;
}
}

1
retroshare-gui/src/gui/elastic/graphwidget.h
View File

@ -101,6 +101,7 @@ private:
std::map<std::string,QPointF> _node_cached_positions ;
uint32_t _edge_length ;
float _friction_factor ;
};
#endif

8
retroshare-gui/src/gui/elastic/node.cpp
View File

@ -111,7 +111,7 @@ const QList<Edge *>& Node::edges() const
// +di *( (1-dj)*map[2*(i+1+W*j)] + dj*map[2*(i+1+W*(j+1))]) ;
//}
void Node::calculateForces(const double *map,int width,int height,int W,int H,float x,float y,float /*speedf*/)
void Node::calculateForces(const double *map,int width,int height,int W,int H,float x,float y,float friction_factor)
{
if (!scene() || scene()->mouseGrabberItem() == this)
{
@ -192,8 +192,8 @@ void Node::calculateForces(const double *map,int width,int height,int W,int H,fl
// now time filter:
_speedx += xforce / MASS_FACTOR;
_speedy += yforce / MASS_FACTOR;
_speedx += xforce / MASS_FACTOR ;
_speedy += yforce / MASS_FACTOR ;
if(_speedx > 10) _speedx = 10.0f ;
if(_speedy > 10) _speedy = 10.0f ;
@ -201,7 +201,7 @@ void Node::calculateForces(const double *map,int width,int height,int W,int H,fl
if(_speedy <-10) _speedy =-10.0f ;
QRectF sceneRect = scene()->sceneRect();
newPos = pos() + QPointF(_speedx, _speedy);
newPos = pos() + QPointF(_speedx, _speedy) / friction_factor;
newPos.setX(qMin(qMax(newPos.x(), sceneRect.left() + 10), sceneRect.right() - 10));
newPos.setY(qMin(qMax(newPos.y(), sceneRect.top() + 10), sceneRect.bottom() - 10));
}