private void initNodesAndConnections()
{
Random rand;
_nodeMap = new Dictionary <DiagramNode, ForceItem>();
//Use a pre-defined seed so that the "random" numbers are always the same.
//This will ensure an even distribution, yet the layout will not change
//each time it is rendered.
rand = new Random(42346234);
//Add the nodes
foreach (DiagramNode currDiagramNode in _nodes)
{
ForceItem forceNode;
forceNode = new ForceItem();
forceNode.Location = new float[] { rand.Next(500), rand.Next(500) };
forceNode.Mass = (float)1.0;
//Add the node to our map so we can look up the force item by node
_nodeMap.Add(currDiagramNode, forceNode);
_simulator.addItem(forceNode);
}
//Add the springs/connections
foreach (DiagramNodeConnection currConnection in _connections)
{
_simulator.addSpring(_nodeMap[currConnection.FirstNode], _nodeMap[currConnection.SecondNode]);
}
}
/// <summary>
/// Loads the simulator with all relevant force items and springs.
/// </summary>
/// <param name="fsim"> the force simulator driving this layout.</param>
protected void InitializeSimulator(ForceSimulator fsim)
{
//TODO: some checks here...?
float startX = (referrer == null ? 0f : (float)referrer.X);
float startY = (referrer == null ? 0f : (float)referrer.Y);
startX = float.IsNaN(startX) ? 0f : startX;
startY = float.IsNaN(startY) ? 0f : startY;
if (Nodes != null && Nodes.Count > 0)
{
foreach (INode item in Nodes)
{
ForceItem fitem = Pars[item.Uid.ToString()];
fitem.Mass = getMassValue(item);
double x = item.X;
double y = item.Y;
fitem.Location[0] = (Double.IsNaN(x) ? startX : (float)x);
fitem.Location[1] = (Double.IsNaN(y) ? startY : (float)y);
fsim.addItem(fitem);
}
}
if (Edges != null && Edges.Count > 0)
{
foreach (IEdge e in Edges)
{
INode n1 = e.SourceNode;
if (n1 == null)
{
continue;
}
ForceItem f1 = Pars[n1.Uid.ToString()];
INode n2 = e.TargetNode;
if (n2 == null)
{
continue;
}
ForceItem f2 = Pars[n2.Uid.ToString()];
float coeff = getSpringCoefficient(e);
float slen = getSpringLength(e);
fsim.addSpring(f1, f2, (coeff >= 0 ? coeff : -1.0F), (slen >= 0 ? slen : -1.0F));
}
}
}
/// <summary>
/// Loads the simulator with all relevant force items and springs.
/// </summary>
/// <param name="fsim"> the force simulator driving this layout.</param>
protected void InitializeSimulator(ForceSimulator fsim)
{
//TODO: some checks here...?
float startX = (referrer == null ? 0f : (float)referrer.X);
float startY = (referrer == null ? 0f : (float)referrer.Y);
startX = float.IsNaN(startX) ? 0f : startX;
startY = float.IsNaN(startY) ? 0f : startY;
foreach (node item in graph.nodes)
{
ForceItem fitem = Pars[item.name];
fitem.Mass = getMassValue(item);
double x = item.X;
double y = item.Y;
fitem.Location[0] = (Double.IsNaN(x) ? startX : (float)x);
fitem.Location[1] = (Double.IsNaN(y) ? startY : (float)y);
fsim.addItem(fitem);
}
foreach (arc e in graph.arcs)
{
node n1 = e.From;
if (n1 == null)
{
continue;
}
ForceItem f1 = Pars[n1.name];
node n2 = e.To;
if (n2 == null)
{
continue;
}
ForceItem f2 = Pars[n2.name];
float coeff = getSpringCoefficient(e);
float slen = getSpringLength(e);
fsim.addSpring(f1, f2, (coeff >= 0 ? coeff : -1.0F), (slen >= 0 ? slen : -1.0F));
}
}