/// <summary>
/// Fetches every Node Declaration in the script assemblies to provide the framework with custom node types
/// </summary>
public static void FetchNodeTypes()
{
nodes = new Dictionary <string, NodeTypeData> ();
foreach (Type type in ReflectionUtility.getSubTypes(typeof(Node)))
{
object[] nodeAttributes = type.GetCustomAttributes(typeof(NodeAttribute), false);
if (nodeAttributes.Length == 0)
{
continue;
}
NodeAttribute attr = nodeAttributes[0] as NodeAttribute;
if (attr == null || !attr.hide)
{ // Only regard if it is not marked as hidden
// Fetch node information
string ID, Title = "None";
FieldInfo IDField = type.GetField("ID");
if (IDField == null || attr == null)
{ // Cannot read ID from const field or need to read Title because of missing attribute -> Create sample to read from properties
Node sample = (Node)ScriptableObject.CreateInstance(type);
ID = sample.GetID;
Title = sample.Title;
UnityEngine.Object.DestroyImmediate(sample);
}
else // Can read ID directly from const field
{
ID = (string)IDField.GetValue(null);
}
// Create Data from information
NodeTypeData data = attr == null? // Switch between explicit information by the attribute or node information
new NodeTypeData(ID, Title, type, new Type[0]) :
new NodeTypeData(ID, attr.contextText, type, attr.limitToCanvasTypes);
nodes.Add(ID, data);
}
}
}
