initial game submission

Packages/org.khronos.unitygltf/Runtime/Scripts/Async/AsyncCoroutineHelper.cs

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+using System.Collections;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using UnityEngine;
+
+namespace UnityGLTF
+{
+    public class AsyncCoroutineHelper : MonoBehaviour
+    {
+        public float BudgetPerFrameInSeconds = 0.01f;
+
+        private WaitForEndOfFrame _waitForEndOfFrame = new WaitForEndOfFrame();
+        private float _timeout;
+
+        public async Task YieldOnTimeout()
+        {
+            if (Time.realtimeSinceStartup > _timeout)
+            {
+                await Task.Yield();
+                _timeout = Time.realtimeSinceStartup + BudgetPerFrameInSeconds;
+            }
+        }
+
+        private void Start()
+        {
+            _timeout = Time.realtimeSinceStartup + BudgetPerFrameInSeconds;
+
+            StartCoroutine(ResetFrameTimeout());
+        }
+
+        private IEnumerator ResetFrameTimeout()
+        {
+            while (true)
+            {
+                yield return _waitForEndOfFrame;
+                _timeout = Time.realtimeSinceStartup + BudgetPerFrameInSeconds;
+            }
+        }
+    }
+}

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Packages/org.khronos.unitygltf/Runtime/Scripts/Async/TaskExtensions.cs

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+#if UNITY_2017_1_OR_NEWER
+using System.Collections;
+using System.Threading.Tasks;
+
+namespace UnityGLTF
+{
+	public static class TaskExtensions
+	{
+		public static IEnumerator AsCoroutine(this Task task)
+		{
+			while (!task.IsCompleted)
+			{
+				yield return null;
+			}
+		}
+	}
+}
+#endif

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