public void SetBehaviourTree(BehaviourTree tree)
{
NodeSelection.ClearSelection();
Canvas = new BonsaiCanvas(tree);
Viewer.Canvas = Canvas;
Viewer.NodeSelection = NodeSelection;
Viewer.zoom = tree.zoomPosition;
Viewer.panOffset = tree.panPosition;
}
public static BonsaiNode DuplicateSingle(BonsaiCanvas canvas, BonsaiNode original)
{
BonsaiNode duplicate = canvas.CreateNode(original.Behaviour.GetType());
// Duplicate nodes are placed offset from the original.
duplicate.Position = original.Position + Vector2.one * 40f;
return(duplicate);
}
// Adds the tree to the database and saves the nodes to the database.
private void SaveNewTree(string path, TreeMetaData meta, BonsaiCanvas canvas)
{
// Save tree and black board assets
AssetDatabase.CreateAsset(canvas.Tree, path);
AssetDatabase.AddObjectToAsset(canvas.Tree.Blackboard, canvas.Tree);
// Save nodes.
SaveTree(meta, canvas);
}
private void SaveTreeMetaData(TreeMetaData meta, BonsaiCanvas canvas)
{
foreach (var editorNode in canvas.Nodes)
{
editorNode.Behaviour.bonsaiNodePosition = editorNode.Position;
}
canvas.Tree.panPosition = meta.pan;
canvas.Tree.zoomPosition = meta.zoom;
}
private void SetCompositeChildren(BonsaiCanvas canvas)
{
IEnumerable <BonsaiNode> compositeNodes = canvas.Nodes.Where(n => n.Behaviour.IsComposite());
foreach (BonsaiNode node in compositeNodes)
{
var compositeBehaviour = node.Behaviour as Composite;
compositeBehaviour.SetChildren(node.Children.Select(ch => ch.Behaviour).ToArray());
}
}
private void SetDecoratorChildren(BonsaiCanvas canvas)
{
IEnumerable <BonsaiNode> decoratorNodes = canvas.Nodes
.Where(n => n.Behaviour.IsDecorator() && n.ChildCount() == 1);
foreach (BonsaiNode node in decoratorNodes)
{
var decoratorBehaviour = node.Behaviour as Decorator;
decoratorBehaviour.SetChild(node.GetChildAt(0).Behaviour);
}
}
// Saves the current tree and nodes.
private void SaveTree(TreeMetaData meta, BonsaiCanvas canvas)
{
// If the blackboard is not yet in the database, then add.
AddBlackboardIfMissing(canvas.Tree);
var treeBehaviours = canvas.Tree.AllNodes;
var canvasBehaviours = canvas.Nodes.Select(n => n.Behaviour);
// New nodes that need to be added to the database.
foreach (BehaviourNode newNodes in canvasBehaviours.Except(treeBehaviours))
{
newNodes.name = newNodes.GetType().Name;
newNodes.hideFlags = HideFlags.HideInHierarchy;
AssetDatabase.AddObjectToAsset(newNodes, canvas.Tree);
}
// Clear all parent-child connections. These will be reconstructed to match the connection in the BonsaiNodes.
canvas.Tree.ClearStructure();
// Sort the canvas.
// Only consider nodes with 2 or more children for sorting.
foreach (BonsaiNode node in canvas.Nodes.Where(node => node.ChildCount() > 1))
{
node.SortChildren();
}
// Set parent-child connections matching those in the canvas. Only consider decorators and composites.
foreach (BonsaiNode node in canvas.Nodes.Where(node => node.ChildCount() > 0))
{
foreach (BonsaiNode child in node.Children)
{
node.Behaviour.AddChild(child.Behaviour);
}
}
// Re-add nodes to tree.
foreach (BonsaiNode node in canvas.Nodes)
{
node.Behaviour.Tree = canvas.Tree;
}
if (canvas.Root != null)
{
canvas.Tree.Root = canvas.Root.Behaviour;
}
// Sort the nodes in pre order so it is easier to clone the tree.
canvas.Tree.SortNodes();
SaveTreeMetaData(meta, canvas);
AssetDatabase.SaveAssets();
}
/// <summary>
/// Create a new node for the first time.
/// </summary>
/// <param name="parentCanvas">The canvas that the node belongs to.</param>
/// <param name="bCreateInput">If the node should have an input.</param>
/// <param name="bCreateOuput">If the node should have an output.</param>
public BonsaiNode(BonsaiCanvas parentCanvas, bool bCreateInput, bool bCreateOuput, bool bCanHaveMultipleChildren)
{
bodyRect = new Rect(Vector2.zero, kDefaultSize);
if (bCreateInput)
{
_inputKnob = new BonsaiInputKnob();
_inputKnob.parentNode = this;
}
if (bCreateOuput)
{
_outputKnob = new BonsaiOutputKnob();
_outputKnob.parentNode = this;
}
this.bCanHaveMultipleChildren = bCanHaveMultipleChildren;
}
private void onMultiNodeCallback(object o)
{
NodeContext context = (NodeContext)o;
switch (context)
{
case NodeContext.DuplicateSelection:
BonsaiCanvas canvas = _window.editor.canvas;
BehaviourTree bt = _window.tree;
for (int i = 0; i < _selectedNodes.Count; ++i)
{
// The original nodes will become selected.
BonsaiNode node = _selectedNodes[i];
node.bAreaSelectionFlag = false;
Type t = node.behaviour.GetType();
// Duplicate nodes become selected and are spawned
// at offset from their original.
BonsaiNode duplicate = canvas.CreateNode(t, bt);
duplicate.bAreaSelectionFlag = true;
duplicate.bodyRect.position = node.bodyRect.position + Vector2.one * 40f;
// Replace in the list with new selections.
_selectedNodes[i] = duplicate;
}
// Notify inspector about the new selections.
setSelectedInInspector();
break;
case NodeContext.DeleteSelection:
_window.editor.canvas.RemoveSelected();
clearAreaSelection();
setTreeAsSelected();
break;
}
}
/// <summary>
/// Duplicate multiple nodes and preserve the connections between parent and child nodes.
/// </summary>
/// <param name="canvas"></param>
/// <param name="tree"></param>
/// <param name="originals"></param>
/// <returns></returns>
public static List <BonsaiNode> DuplicateMultiple(BonsaiCanvas canvas, IEnumerable <BonsaiNode> originals)
{
var duplicateMap = originals.ToDictionary(og => og, og => DuplicateSingle(canvas, og));
// Reconstruct connection in clone nodes.
foreach (BonsaiNode original in originals)
{
for (int i = 0; i < original.ChildCount(); i++)
{
// Only consider children if they were also cloned.
if (duplicateMap.TryGetValue(original.GetChildAt(i), out BonsaiNode cloneChild))
{
BonsaiNode cloneParent = duplicateMap[original];
cloneChild.SetParent(cloneParent);
}
}
}
return(duplicateMap.Values.ToList());
}
/// <summary>
/// Saves the behaviour tree from the canvas.
/// If the tree is unsaved (new) then it prompts the user to specify a file to save.
/// </summary>
/// <param name="canvas"></param>
public void SaveCanvas(BonsaiCanvas canvas, TreeMetaData meta)
{
// Tree is new, need to save to asset database.
if (!AssetDatabase.Contains(canvas.Tree))
{
GetSaveFilePath()
.OnSuccess(savePath =>
{
SaveNewTree(savePath, meta, canvas);
OnTreeSaved();
})
.OnFailure(OnInvalidPathError);
}
// Tree is already saved. Save nodes and tree data.
else
{
SaveTree(meta, canvas);
OnTreeSaved();
}
}
// Saves the current tree and nodes.
private void SaveTree(TreeMetaData meta, BonsaiCanvas canvas)
{
// If the blackboard is not yet in the database, then add.
AddBlackboardIfMissing(canvas.Tree);
var canvasBehaviours = canvas.Nodes.Select(n => n.Behaviour);
AddNewNodeAssets(canvas.Tree, canvasBehaviours);
// Clear all parent-child connections. These will be reconstructed to match the connection in the BonsaiNodes.
canvas.Tree.ClearStructure();
// Sort the canvas.
// Only consider nodes with 2 or more children for sorting.
foreach (BonsaiNode node in canvas.Nodes.Where(node => node.ChildCount() > 1))
{
node.SortChildren();
}
// Set parent-child connections matching those in the canvas. Only consider decorators and composites.
SetCompositeChildren(canvas);
SetDecoratorChildren(canvas);
// Re-add nodes to tree.
if (canvas.Root != null)
{
canvas.Tree.SetNodes(canvas.Root.Behaviour);
}
// Nodes not connected to he root will have an unset pre-order index.
// Tree.ClearStructure unsets the index and is only set in Tree.SetNodes
// for nodes under the root.
canvas.Tree.unusedNodes = canvasBehaviours.Where(
b => b.PreOrderIndex == BehaviourNode.kInvalidOrder).ToList();
SaveTreeMetaData(meta, canvas);
AssetDatabase.SaveAssets();
}