From fd323fda60bbb5b316120733cea56a77a89d76c8 Mon Sep 17 00:00:00 2001
From: Kohei-Yanagida <k-yanagida@virtualcast.jp>
Date: Fri, 26 Feb 2021 19:45:24 +0900
Subject: [PATCH] Check Keyframe length of AnimationCurve

---
 Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationExporter.cs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationExporter.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationExporter.cs
index 4a55e5d64..3dfc65db7 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationExporter.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationExporter.cs
@@ -129,6 +129,11 @@ namespace UniGLTF
             {
                 var curve = AnimationUtility.GetEditorCurve(clip, binding);
 
+                if (!curve.keys.Any())
+                {
+                    throw new Exception("There is no keyframe in AnimationCurve : " + clip.name);
+                }
+
                 var property = AnimationExporter.PropertyToTarget(binding.propertyName);
                 if (property == glTFAnimationTarget.AnimationProperties.NotImplemented)
                 {