// Saves nodes
private bool SaveNodes(BTDataContainer btContainer, string fileName)
{
// If there are no connections then display error
if (!edges.Any())
{
EditorUtility.DisplayDialog("No connections", "Create some connections in your tree before saving!", "Ok");
return(false);
}
// Save node connections
Edge[] connectedPorts = edges.Where(x => x.input.node != null).ToArray();
for (int i = 0; i < connectedPorts.Length; i++)
{
BTEditorNode outputNode = connectedPorts[i].output.node as BTEditorNode;
BTEditorNode inputNode = connectedPorts[i].input.node as BTEditorNode;
btContainer.nodeLinks.Add(new NodeLinkData
{
BaseNodeGuid = outputNode.GUID,
PortName = connectedPorts[i].output.portName,
TargetNodeGuid = inputNode.GUID
});
}
// Save individual node data
foreach (BTEditorNode node in nodes)
{
NodeData temp = new NodeData
{
nodeTitle = node.title,
nodeName = node.nodeName,
GUID = node.GUID,
Position = node.GetPosition().position,
nodeType = (int)node.nodeType,
topNode = node.topNode
};
if (node.compositeInstance != null)
{
temp.compositeInstance = (Composite)SaveNode(node.title + node.GUID, node.compositeInstance, fileName);
}
else if (node.decoratorInstance != null)
{
temp.decoratorInstance = (Decorator)SaveNode(node.title + node.GUID, node.decoratorInstance, fileName);
}
else if (node.actionInstance != null)
{
temp.actionInstance = (Action)SaveNode(node.title + node.GUID, node.actionInstance, fileName);
}
btContainer.nodeData.Add(temp);
}
return(true);
}
/// <summary>
/// Called when a search tree entry is selected
/// </summary>
/// <param name="SearchTreeEntry"></param>
/// <param name="context"></param>
/// <returns></returns>
public bool OnSelectEntry(SearchTreeEntry SearchTreeEntry, SearchWindowContext context)
{
// Get mouse world mosue position in editor window
Vector2 worldMousePosition = _editorWindow.rootVisualElement.ChangeCoordinatesTo(_editorWindow.rootVisualElement.parent,
context.screenMousePosition - _editorWindow.position.position);
// Convert it to graphview coords to spawn nodes at mouse position
Vector2 localMousePosition = _graphView.contentViewContainer.WorldToLocal(worldMousePosition);
BTEditorNode tempNode = (BTEditorNode)SearchTreeEntry.userData;
_graphView.CreateNode(tempNode.nodeName, tempNode.nodeName, tempNode.nodeType, localMousePosition);
return(true);
}
/// <summary>
/// Adds a port to a target node
/// </summary>
/// <param name="targetNode"></param>
/// <param name="overriddenPortName"></param>
public void AddPort(BTEditorNode targetNode, string overriddenPortName = "")
{
// Generate port
Port generatedPort = GeneratePort(targetNode, Direction.Output);
// Removes default label from port in favour of editable labels
Label oldLabel = generatedPort.contentContainer.Q <Label>("type");
generatedPort.contentContainer.Remove(oldLabel);
// Adds default port name
int outputPortCount = targetNode.outputContainer.Query("connector").ToList().Count;
generatedPort.portName = outputPortCount.ToString();
// Check if default portname is overridden
string portName = string.IsNullOrEmpty(overriddenPortName)
? outputPortCount.ToString()
: overriddenPortName;
// Adds name field
TextField textField = new TextField
{
name = string.Empty,
value = portName
};
// textField.RegisterValueChangedCallback(evt => generatedPort.portName = evt.newValue);
generatedPort.contentContainer.Add(new Label(" "));
generatedPort.contentContainer.Add(textField);
// Adds delete port button
Button deleteButton = new Button(() => RemovePort(targetNode, generatedPort))
{
text = "X"
};
generatedPort.contentContainer.Add(deleteButton);
generatedPort.portName = portName;
targetNode.outputContainer.Add(generatedPort);
targetNode.RefreshPorts();
targetNode.RefreshExpandedState();
}
/// <summary>
/// Returns list of child nodes based on node GUID
/// </summary>
/// <param name="nodeGUID"></param>
/// <returns></returns>
public List <BTEditorNode> GetChildNodes(string nodeGUID, string fileName)
{
// Update cache to contain current nodes
SaveGraph(fileName);
_containerCache = Resources.Load <BTDataContainer>(fileName);
List <NodeLinkData> connections = _containerCache.nodeLinks.Where(x => x.BaseNodeGuid == nodeGUID).ToList(); // Get connections from active container cache
List <BTEditorNode> childNodes = new List <BTEditorNode>();
// Loop through connections for a given node and find its child nodes via GUID matching
for (int i = 0; i < connections.Count; i++)
{
string targetNodeGUID = connections[i].TargetNodeGuid;
BTEditorNode targetNode = nodes.First(x => x.GUID == targetNodeGUID);
childNodes.Add(targetNode);
}
return(childNodes);
}
// Removes port from target node
private void RemovePort(BTEditorNode targetNode, Port portToRemove)
{
// Find port in node that matches port to remove
IEnumerable <Edge> targetEdge = edges.ToList().Where(x => x.output.portName == portToRemove.portName && x.output.node == portToRemove.node);
// If no edges got added to the list only remove port
if (!targetEdge.Any())
{
targetNode.outputContainer.Remove(portToRemove);
}
else // If edges remove edges then remove port
{
// Get edge matching the above requirements and remove connections and then the port
Edge edge = targetEdge.First();
edge.input.Disconnect(edge);
RemoveElement(targetEdge.First());
targetNode.outputContainer.Remove(portToRemove);
targetNode.RefreshPorts();
targetNode.RefreshExpandedState();
}
}
// Generate nodes based on save data
private void CreateNodes()
{
BTEditorNode tempNode = null;
foreach (NodeData nodeData in _containerCache.nodeData)
{
// Generate node based on node data. We pass node position later so we can use zerovector while loading
switch ((NodeTypes)nodeData.nodeType)
{
case NodeTypes.Composite:
tempNode = _targetGraphView.GenerateNode(nodeData.nodeTitle, nodeData.nodeName, (NodeTypes)nodeData.nodeType, Vector2.zero, nodeData.topNode, nodeData.compositeInstance);
tempNode.GUID = nodeData.GUID;
break;
case NodeTypes.Decorator:
tempNode = _targetGraphView.GenerateNode(nodeData.nodeTitle, nodeData.nodeName, (NodeTypes)nodeData.nodeType, Vector2.zero, nodeData.topNode, nodeData.decoratorInstance);
tempNode.GUID = nodeData.GUID;
break;
case NodeTypes.Action:
tempNode = _targetGraphView.GenerateNode(nodeData.nodeTitle, nodeData.nodeName, (NodeTypes)nodeData.nodeType, Vector2.zero, nodeData.topNode, nodeData.actionInstance);
tempNode.GUID = nodeData.GUID;
break;
default:
break;
}
// Add ports to node based on node data. If it's a decorator node the port will be generated automatically so theres no need to add ports
if (tempNode.nodeType != NodeTypes.Decorator)
{
List <NodeLinkData> nodePorts = _containerCache.nodeLinks.Where(x => x.BaseNodeGuid == nodeData.GUID).ToList();
nodePorts.ForEach(x => _targetGraphView.AddPort(tempNode, x.PortName));
}
_targetGraphView.AddElement(tempNode);
}
}
/// <summary>
/// Generates and returns an node instance without adding it to the editor window
/// </summary>
/// <param name="nodeTitle"></param>
/// <param name="type"></param>
/// <returns></returns>
public BTEditorNode GenerateNode(string nodeTitle, string nodeName, NodeTypes type, Vector2 position, bool isTopNode = false, AbstractNode instance = null)
{
BTEditorNode node = null;
switch (type)
{
case NodeTypes.Composite:
node = GenerateCompositeNode(nodeTitle, nodeName, position, isTopNode, instance);
break;
case NodeTypes.Decorator:
node = GenerateDecoratorNode(nodeTitle, nodeName, position, isTopNode, instance);
break;
case NodeTypes.Action:
node = GenerateActionNode(nodeTitle, nodeName, position, isTopNode, instance);
break;
default:
break;
}
return(node);
}
// Generate a port
private Port GeneratePort(BTEditorNode target, Direction portDir, Port.Capacity capacity = Port.Capacity.Single)
{
return(target.InstantiatePort(Orientation.Horizontal, portDir, capacity, typeof(float)));
}
// Generate decorator node
private BTEditorNode GenerateDecoratorNode(string nodeTitle, string name, Vector2 position, bool isTopNode = false, AbstractNode instance = null)
{
BTEditorNode node = new BTEditorNode
{
title = nodeTitle,
nodeName = name,
GUID = System.Guid.NewGuid().ToString(),
nodeType = NodeTypes.Decorator,
topNode = isTopNode
};
// Create new instance if not loading from already existing behaviour tree
if (instance != null)
{
node.decoratorInstance = instance as Decorator;
}
else
{
node.decoratorInstance = ScriptableObject.CreateInstance(name) as Decorator;
}
// Stash and remove old title and minimize button elements
Label oldTitleLabel = node.titleContainer.Q <Label>("title-label");
node.titleContainer.Remove(oldTitleLabel);
VisualElement oldTitleButton = node.titleContainer.Q <VisualElement>("title-button-container");
node.titleContainer.Remove(oldTitleButton);
// Create and add text field for title input
TextField textField = new TextField
{
name = string.Empty,
value = node.title
};
textField.RegisterValueChangedCallback(evt => node.title = evt.newValue);
node.titleContainer.Add(textField);
node.titleContainer.Add(oldTitleButton); // Add back minimize button in title container after adding title input field
// Input/Output port
node.inputContainer.Add(GeneratePort(node, Direction.Input, Port.Capacity.Multi));
node.outputContainer.Add(GeneratePort(node, Direction.Output, Port.Capacity.Multi));
// Object field for behaviour instance
ObjectField objectField = new ObjectField();
objectField.objectType = typeof(ScriptableObject);
objectField.value = node.decoratorInstance;
node.mainContainer.Add(objectField);
// Node state element
Label nodeStateLabel = new Label {
name = "node-state-label", text = node.decoratorInstance.NodeState.ToString()
};
node.titleContainer.Add(nodeStateLabel);
node.RefreshExpandedState();
node.RefreshPorts();
node.SetPosition(new Rect(position, defaultNodeSize));
return(node);
}
// Generates entry point node at editor startup
private BTEditorNode GenerateEntryPointNode(string nodeName)
{
// Instantiate new node
BTEditorNode node = new BTEditorNode
{
title = nodeName,
nodeName = "Selector",
compositeInstance = (Composite)ScriptableObject.CreateInstance("Selector"),
GUID = System.Guid.NewGuid().ToString(),
nodeType = NodeTypes.Composite,
topNode = true,
};
// Stash and remove old title and minimize button elements
Label oldTitleLabel = node.titleContainer.Q <Label>("title-label");
node.titleContainer.Remove(oldTitleLabel);
VisualElement oldTitleButton = node.titleContainer.Q <VisualElement>("title-button-container");
node.titleContainer.Remove(oldTitleButton);
// Create and add text field for title input
TextField textField = new TextField
{
name = nodeName,
value = "Top Node"
};
textField.RegisterValueChangedCallback(evt => node.title = evt.newValue);
node.titleContainer.Add(textField);
node.titleContainer.Add(oldTitleButton); // Add back minixmize button in title container after adding title input field
// Node state element
Label nodeStateLabel = new Label {
name = "node-state-label", text = node.compositeInstance.NodeState.ToString()
};
node.titleContainer.Add(nodeStateLabel);
// Instantiate add port button
Button button = new Button(() => { AddPort(node); });
button.text = "New Child Behaviour";
node.titleContainer.Add(button);
// Instance field
ObjectField objectField = new ObjectField();
objectField.objectType = typeof(ScriptableObject);
objectField.value = node.compositeInstance;
node.mainContainer.Add(objectField);
AddPort(node);
AddPort(node);
node.capabilities &= ~Capabilities.Movable;
node.capabilities &= ~Capabilities.Deletable;
// Refresh node
node.RefreshExpandedState();
node.RefreshPorts();
node.SetPosition(new Rect(new Vector2(100, 200), defaultNodeSize));
return(node);
}