From 1bd7210107069270c419a62ab8a4642540f9b367 Mon Sep 17 00:00:00 2001
From: Ruan Lucas <79365912+RuanLucasGD@users.noreply.github.com>
Date: Fri, 21 Jul 2023 21:05:36 -0400
Subject: [PATCH] don't let aligned or free mode on first or end spline point

---
 .../CustomEditors/Dedicated/SplineEditor.cs      | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/Source/Editor/CustomEditors/Dedicated/SplineEditor.cs b/Source/Editor/CustomEditors/Dedicated/SplineEditor.cs
index 56aaf5d7c..d83aa1acc 100644
--- a/Source/Editor/CustomEditors/Dedicated/SplineEditor.cs
+++ b/Source/Editor/CustomEditors/Dedicated/SplineEditor.cs
@@ -318,9 +318,9 @@ namespace FlaxEditor.CustomEditors.Dedicated
             UpdateSelectedPoint();
             UpdateSelectedTangent();
 
-            _freeTangentButton.Button.Enabled = CanSetTangentMode();
+            _freeTangentButton.Button.Enabled = CanSetTangentFree();
             _linearTangentButton.Button.Enabled = CanSetTangentMode();
-            _alignedTangentButton.Button.Enabled = CanSetTangentMode();
+            _alignedTangentButton.Button.Enabled = CanSetTangentAligned();
             _smoothInTangentButton.Button.Enabled = CanSetTangentSmoothIn();
             _smoothOutTangentButton.Button.Enabled = CanSetTangentSmoothOut();
 
@@ -376,6 +376,18 @@ namespace FlaxEditor.CustomEditors.Dedicated
             return _lastPointSelected.Index < SelectedSpline.SplinePointsCount - 1;
         }
 
+        private bool CanSetTangentFree()
+        {
+            if (!CanSetTangentMode()) return false;
+            return _lastPointSelected.Index < SelectedSpline.SplinePointsCount - 1 && _lastPointSelected.Index != 0;
+        }
+
+        private bool CanSetTangentAligned()
+        {
+            if (!CanSetTangentMode()) return false;
+            return _lastPointSelected.Index < SelectedSpline.SplinePointsCount - 1 && _lastPointSelected.Index != 0; 
+        }
+
         private void SetModeLinear()
         {
             _currentTangentMode = new LinearTangentMode();