chore: initial commit

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

@@ -0,0 +1,58 @@
+#if GRAPH_DESIGNER
+/// ---------------------------------------------
+/// Behavior Designer
+/// Copyright (c) Opsive. All Rights Reserved.
+/// https://www.opsive.com
+/// ---------------------------------------------
+namespace Opsive.BehaviorDesigner.Runtime.Tasks.Actions
+{
+    using Opsive.GraphDesigner.Runtime;
+    using System.Collections;
+    using UnityEngine;
+
+    [NodeIcon("e0a8f1df788b6274a9a24003859dfa7e")]
+    [Opsive.Shared.Utility.Description("Starts the specified behavior tree.")]
+    public class StartBehaviorTree : TargetBehaviorTreeAction
+    {
+        private TaskStatus m_Status;
+
+        /// <summary>
+        /// The task has started.
+        /// </summary>
+        public override void OnStart()
+        {
+            m_Status = TaskStatus.Queued;
+        }
+
+        /// <summary>
+        /// Executes the task logic.
+        /// </summary>
+        /// <returns>The status of the task.</returns>
+        public override TaskStatus OnUpdate()
+        {
+            // The coroutine has already been started if the status is not queued.
+            if (m_Status != TaskStatus.Queued) {
+                return m_Status;
+            }
+
+            if (m_ResolvedBehaviorTree == null || m_ResolvedBehaviorTree.IsActive()) {
+                return TaskStatus.Failure;
+            }
+
+            m_Status = TaskStatus.Running;
+            StartCoroutine(StartBehavior());
+            return m_Status;
+        }
+
+        /// <summary>
+        /// Starts the behavior tree using a coroutine to allow structural changes.
+        /// </summary>
+        private IEnumerator StartBehavior()
+        {
+            yield return new WaitForEndOfFrame();
+
+            m_Status = m_ResolvedBehaviorTree.StartBehavior() ? TaskStatus.Success : TaskStatus.Failure;
+        }
+    }
+}
+#endif