/// <summary>
/// Represents a single node on a graph of interconnected nodes
/// </summary>
/// <param name="nodeType">The class of the node being implemented</param>
/// <param name="manager">The parent manager of the node</param>
public GraphNode(Type nodeType, NodeGraphManager manager)
{
GraphManager = manager;
NodeInputs = new List <InputPin>();
NodeOutputs = new List <OutputPin>();
NodeType = nodeType;
// Extract information about the node
FieldInfo[] fields = NodeType.GetFields();
// Set input pins
foreach (FieldInfo field in fields)
{
Attribute[] attributes = field.GetCustomAttributes().ToArray();
foreach (Attribute attribute in attributes)
{
if (attribute.GetType() == typeof(ExposedInput))
{
InputPin input = new InputPin(field.FieldType, this);
NodeInputs.Add(input);
}
}
}
// Set output pins
foreach (FieldInfo field in fields)
{
Attribute[] attributes = field.GetCustomAttributes().ToArray();
foreach (Attribute attribute in attributes)
{
if (attribute.GetType() == typeof(ExposedOutput))
{
OutputPin output = new OutputPin(field.FieldType, this);
NodeOutputs.Add(output);
}
}
}
}
/// <summary>
/// Add a new connection between two pins
/// </summary>
/// <param name="outputPin">The output pin that will provide a value</param>
/// <param name="targetPin">The input pin the will receive the input</param>
public void AddConnection(OutputPin outputPin, InputPin targetPin)
{
// Make sure we only have one connection per input
foreach (PinConnection connection in Connections)
{
if (connection.InputPin == targetPin)
{
throw new Exception("InputPin already has a connection.");
}
}
Connections.Add(new PinConnection(outputPin, targetPin));
// Add the connected nodes to our model if we need to
if ((nodeNetwork.Contains(outputPin.Parent) == false) && (outputPin.Parent != null))
{
nodeNetwork.Add(outputPin.Parent);
}
if (nodeNetwork.Contains(targetPin.Parent) == false)
{
nodeNetwork.Add(targetPin.Parent);
}
}
public PinConnection(OutputPin outputPin, InputPin inputPin)
{
OutputPin = outputPin;
InputPin = inputPin;
}