Add opacity curve to rings

NewHorizons/Builder/Body/RingBuilder.cs

@@ -133,6 +133,13 @@ namespace NewHorizons.Builder.Body
                 levelController.SetScaleCurve(ring.curve);
             }
 
+            if (ring.opacity != null)
+            {
+                var ringOC = ringGO.AddComponent<RingOpacityController>();
+                ringOC.SetOpacityCurve(ring.opacity);
+                ringOC.SetMeshRenderer(ringMR);
+            }
+
             return ringGO;
         }
 

NewHorizons/Components/RingOpacityController.cs

@@ -0,0 +1,42 @@
+using NewHorizons.External.Modules.VariableSize;
+using UnityEngine;
+
+namespace NewHorizons.Components
+{
+    public class RingOpacityController : MonoBehaviour
+    {
+        private static readonly int Alpha = Shader.PropertyToID("_Alpha");
+
+        public AnimationCurve opacityCurve { get; protected set; }
+        public float CurrentOpacity { get; protected set; }
+
+        private MeshRenderer _meshRenderer;
+
+        protected void FixedUpdate()
+        {
+            if (opacityCurve != null)
+            {
+                CurrentOpacity = opacityCurve.Evaluate(TimeLoop.GetMinutesElapsed());
+            }
+            else
+            {
+                CurrentOpacity = 1;
+            }
+
+            if (_meshRenderer == null) return;
+
+            _meshRenderer.material.SetFloat(Alpha, CurrentOpacity);
+        }
+
+        public void SetOpacityCurve(VariableSizeModule.TimeValuePair[] curve)
+        {
+            opacityCurve = new AnimationCurve();
+            foreach (var pair in curve)
+            {
+                opacityCurve.AddKey(new Keyframe(pair.time, pair.value));
+            }
+        }
+
+        public void SetMeshRenderer(MeshRenderer meshRenderer) => _meshRenderer = meshRenderer;
+    }
+}

NewHorizons/External/Modules/VariableSize/RingModule.cs

@@ -1,4 +1,4 @@
-using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations;
 using Newtonsoft.Json;
 
 namespace NewHorizons.External.Modules.VariableSize
@@ -45,5 +45,10 @@ namespace NewHorizons.External.Modules.VariableSize
         /// Should this ring be unlit?
         /// </summary>
         public bool unlit;
+
+        /// <summary>
+        /// Fade this module over time
+        /// </summary>
+        public TimeValuePair[] opacity;
     }
 }