[Fix Case 1221557] Checkbox Age Particles consistency (#202)

Author: ludovic-theobald

com.unity.visualeffectgraph/CHANGELOG.md

@@ -32,6 +32,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Modified Sign operator node output for float when input is 0.0f [Case 1299922](https://fogbugz.unity3d.com/f/cases/1299922/)
 - An existing link can be remade.
 - Use alphabetical order in type list in blackboard "+" button [Case 1304109](https://issuetracker.unity3d.com/product/unity/issues/guid/1304109/)
+- Consistently displays the Age Particles checkbox in Update context [Case 1221557](https://issuetracker.unity3d.com/product/unity/issues/guid/1221557/)
 
 ## [10.2.0] - 2020-10-19
 ### Added

com.unity.visualeffectgraph/Editor/Models/Contexts/Implementations/VFXBasicUpdate.cs

@@ -175,7 +175,7 @@ protected override IEnumerable<string> filteredOutSettings
 
                 var data = GetData();
                 var lifeTime = data.IsCurrentAttributeWritten(VFXAttribute.Lifetime);
-                var age = data.IsCurrentAttributeRead(VFXAttribute.Age);
+                var age = data.IsCurrentAttributeUsed(VFXAttribute.Age);
                 var positionVelocity = data.IsCurrentAttributeWritten(VFXAttribute.Velocity);
                 var angularVelocity =   data.IsCurrentAttributeWritten(VFXAttribute.AngularVelocityX) ||
                     data.IsCurrentAttributeWritten(VFXAttribute.AngularVelocityY) ||
@@ -225,7 +225,7 @@ protected override IEnumerable<VFXBlock> implicitPostBlock
                     yield return VFXBlock.CreateImplicitBlock<AngularEulerIntegration>(data);
 
                 var lifeTime = GetData().IsCurrentAttributeWritten(VFXAttribute.Lifetime);
-                var age = GetData().IsCurrentAttributeRead(VFXAttribute.Age);
+                var age = GetData().IsCurrentAttributeUsed(VFXAttribute.Age);
 
                 if (age || lifeTime)
                 {