chore: initial commit

Packages/com.opsive.behaviordesigner/Runtime/Tasks/Actions/SubtreeReferenceSelector.cs

@@ -0,0 +1,42 @@
+#if GRAPH_DESIGNER
+/// ---------------------------------------------
+/// Behavior Designer
+/// Copyright (c) Opsive. All Rights Reserved.
+/// https://www.opsive.com
+/// ---------------------------------------------
+namespace Opsive.BehaviorDesigner.Runtime.Tasks.Actions
+{
+    using Opsive.BehaviorDesigner.Runtime;
+    using Opsive.GraphDesigner.Runtime;
+    using Opsive.GraphDesigner.Runtime.Variables;
+    using UnityEngine;
+
+    /// <summary>
+    /// Allows for subtrees to be loaded at runtime into the tree.
+    /// </summary>
+    [Opsive.Shared.Utility.Description("Selects a subtree based on the index value.")]
+    public class SubtreeReferenceSelector : SubtreeReference
+    {
+        [Tooltip("The index of the subtree that should be selected.")]
+        [SerializeField] protected SharedVariable<int> m_Index;
+
+        private Subtree[] m_Selection;
+
+        public override Subtree[] Subtrees => m_Selection != null ? m_Selection : m_Subtrees;
+
+        /// <summary>
+        /// Performs any runtime operations to evaluate the array of subtrees that should be returned.
+        /// </summary>
+        /// <param name="graphComponent">The component that the node is attached to.</param>
+        public override void EvaluateSubtrees(IGraphComponent graphComponent)
+        {
+            if (m_Index.Value < 0 || m_Index.Value >= m_Subtrees.Length) {
+                return;
+            }
+
+            m_Selection = new Subtree[] { m_Subtrees[m_Index.Value] };
+        }
+    }
+}
+
+#endif