/// <summary>
/// Updates the node positions.
/// </summary>
private void UpdateNodePositions()
{
double x1 = 0, x2 = 0, y1 = 0, y2 = 0;
if (Bounds != null)
{
x1 = Bounds.X; y1 = Bounds.Top;
x2 = Bounds.Right; y2 = Bounds.Bottom;
}
// update positions
foreach (INode item in Nodes)
{
ForceItem fitem = Pars[item.Uid.ToString()];
if (item.IsFixed)
{
// clear any force computations
fitem.Force[0] = 0.0f;
fitem.Force[1] = 0.0f;
fitem.Velocity[0] = 0.0f;
fitem.Velocity[1] = 0.0f;
if (Double.IsNaN(item.X))
{
setX(item, referrer, 0.0D);
setY(item, referrer, 0.0D);
}
continue;
}
double x = fitem.Location[0];
double y = fitem.Location[1];
//do we need to check the bounding constraints
if (mEnforceBounds && Bounds != null)
{
double hw = item.Rectangle.Width / 2;
double hh = item.Rectangle.Height / 2;
if (x + hw > x2)
{
x = x2 - hw;
}
if (x - hw < x1)
{
x = x1 + hw;
}
if (y + hh > y2)
{
y = y2 - hh;
}
if (y - hh < y1)
{
y = y1 + hh;
}
}
// set the actual position
setX(item, referrer, x);
setY(item, referrer, y);
}
}
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>
/// Reset the force simulation state for all nodes processed by this layout.
///</summary>
public void Reset()
{
foreach (node item in graph.nodes)
{
ForceItem fitem = Pars[item.name];
if (fitem != null)
{
fitem.Location[0] = (float)item.X;
fitem.Location[1] = (float)item.Y;
fitem.Force[0] = fitem.Force[1] = 0;
fitem.Velocity[0] = fitem.Velocity[1] = 0;
}
}
}
///<summary>
/// Reset the force simulation state for all nodes processed by this layout.
///</summary>
public void Reset()
{
foreach (INode item in Nodes)
{
ForceItem fitem = Pars[item.Uid.ToString()];
if (fitem != null)
{
fitem.Location[0] = (float)item.X;
fitem.Location[1] = (float)item.Y;
fitem.Force[0] = fitem.Force[1] = 0;
fitem.Velocity[0] = fitem.Velocity[1] = 0;
}
}
m_lasttime = -1L;
}
/// <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>
/// Updates the node positions.
/// </summary>
private void UpdateNodePositions()
{
// update node positions
for (int i = 0; i < graph.nodes.Count; i++)
{
node item = graph.nodes[i];
ForceItem fitem = Pars[item.name.ToString()];
fitem.Force[0] = 0.0f;
fitem.Force[1] = 0.0f;
fitem.Velocity[0] = 0.0f;
fitem.Velocity[1] = 0.0f;
if (Double.IsNaN(item.X))
{
graph.nodes[i].X = 0.0f;
graph.nodes[i].Y = 0.0f;
}
graph.nodes[i].X = fitem.Location[0] * (Spacing / 50);
graph.nodes[i].Y = fitem.Location[1] * (Spacing / 50);
}
}
/// <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));
}
}
