fix(behavior-tree): recursive global position changes don't double up

Author: ashblue

Assets/FluidBehaviorTree/Editor/BehaviorTree/Printer/BehaviorTreePrinter.cs

@@ -3,7 +3,7 @@ public class BehaviorTreePrinter {
         private readonly VisualTask _root;
 
         public BehaviorTreePrinter (IBehaviorTree tree) {
-            var container = new TreeContainerVertical();
+            var container = new GraphContainerVertical();
             // @TODO Temporary start position for debugging, replace with a proper scroll view
             container.SetGlobalPosition(300, 0);
             _root = new VisualTask(tree.Root, container);

Assets/FluidBehaviorTree/Editor/BehaviorTree/Printer/Containers.meta

@@ -0,0 +1,27 @@
+namespace CleverCrow.Fluid.BTs.Trees.Editors {
+    public class GraphBox : IGraphBox {
+        public float LocalPositionX { get; private set; }
+        public float LocalPositionY { get; private set; }
+        
+        public float GlobalPositionX { get; private set; }
+        public float GlobalPositionY { get; private set; }
+        
+        public float Width { get; private set; }
+        public float Height { get; private set; }
+
+        public void SetSize (float width, float height) {
+            Width = width;
+            Height = height;
+        }
+
+        public void SetLocalPosition (float x, float y) {
+            LocalPositionX = x;
+            LocalPositionY = y;
+        }
+
+        public void AddGlobalPosition (float x, float y) {
+            GlobalPositionX += x;
+            GlobalPositionY += y;
+        }
+    }
+}

Assets/FluidBehaviorTree/Editor/BehaviorTree/Printer/Containers/GraphBox.cs

@@ -0,0 +1,56 @@
+using System.Collections.Generic;
+
+namespace CleverCrow.Fluid.BTs.Trees.Editors {
+    public class GraphContainerHorizontal : IGraphContainer {
+        protected readonly List<IGraphBox> _childContainers = new List<IGraphBox>();
+        
+        public float LocalPositionX { get; private set; }
+        public float LocalPositionY { get; private set; }
+        public float GlobalPositionX { get; private set; }
+        public float GlobalPositionY { get; private set; }
+        public float Width { get; protected set; }
+        public float Height { get; protected set; }
+        public List<IGraphBox> ChildContainers => _childContainers;
+
+        public void SetLocalPosition (float x, float y) {
+            LocalPositionX = x;
+            LocalPositionY = y;
+        }
+
+        public virtual void AddBox (IGraphBox child) {
+            CalculateChild(child);
+            _childContainers.Add(child);
+        }
+
+        private void CalculateChild (IGraphBox child) {
+            child.SetLocalPosition(Width, 0);
+            child.AddGlobalPosition(GlobalPositionX + child.LocalPositionX, GlobalPositionY + child.LocalPositionY);
+
+            Width += child.Width;
+            if (child.Height > Height) Height = child.Height;
+        }
+
+        public void SetSize (float width, float height) {
+            throw new System.NotImplementedException();
+        }
+
+        public void SetGlobalPosition (float x, float y) {
+            GlobalPositionX = x;
+            GlobalPositionY = y;
+        }
+
+        public void AddGlobalPosition (float x, float y) {
+            GlobalPositionX += x;
+            GlobalPositionY += y;
+            
+            foreach (var child in ChildContainers) {
+                child.AddGlobalPosition(x, y);
+            }
+        }
+
+        public override string ToString () {
+            return
+                $"Size: {Width}, {Height}; Local: {LocalPositionX}, {LocalPositionY}; Global: {GlobalPositionX}, {GlobalPositionY};";
+        }
+    }
+}

Assets/FluidBehaviorTree/Editor/BehaviorTree/Printer/Containers/GraphBox.cs.meta

@@ -0,0 +1,16 @@
+namespace CleverCrow.Fluid.BTs.Trees.Editors {
+    public class GraphContainerVertical : GraphContainerHorizontal {
+        public override void AddBox (IGraphBox child) {
+            CalculateChild(child);
+            _childContainers.Add(child);
+        }
+
+        private void CalculateChild (IGraphBox child) {
+            child.SetLocalPosition(0, Height);
+            child.AddGlobalPosition(GlobalPositionX + child.LocalPositionX, GlobalPositionY + child.LocalPositionY);
+
+            Height += child.Height;
+            if (child.Width > Width) Width = child.Width;
+        }
+    }
+}

Assets/FluidBehaviorTree/Editor/BehaviorTree/Printer/Containers/GraphContainerHorizontal.cs

@@ -0,0 +1,15 @@
+namespace CleverCrow.Fluid.BTs.Trees.Editors {
+    public interface IGraphBox {
+        float LocalPositionX { get; }
+        float LocalPositionY { get; }
+        float GlobalPositionX { get; }
+        float GlobalPositionY { get; }
+
+        float Width { get; }
+        float Height { get; }
+
+        void SetSize (float width, float height);
+        void SetLocalPosition (float x, float y);
+        void AddGlobalPosition (float x, float y);
+    }
+}