Removed ColorTransitions. Will be revived in future PR.

src/Avalonia.Visuals/Animation/Transitions/ColorTransition.cs

@@ -1,40 +0,0 @@
-// Copyright (c) The Avalonia Project. All rights reserved.
-// Licensed under the MIT license. See licence.md file in the project root for full license information.
-
-using Avalonia.Metadata;
-using System;
-using System.Reactive.Linq;
-using Avalonia.Media;
-using System.Numerics;
-
-namespace Avalonia.Animation.Transitions
-{
-    /// <summary>
-    /// Transition class that handles <see cref="AvaloniaProperty"/> with <see cref="SolidColorBrush"/> types.
-    /// TODO: Must be refactored to handle object creation every frame.
-    /// </summary>  
-    public class ColorTransition : Transition<SolidColorBrush>
-    {
-        public override IObservable<SolidColorBrush> DoTransition(IObservable<double> progress, SolidColorBrush oldValue, SolidColorBrush newValue)
-        {
-            var oldColor = new Vector4(oldValue.Color.R, oldValue.Color.G, oldValue.Color.B, oldValue.Color.A);
-            var newColor = new Vector4(newValue.Color.R, newValue.Color.G, newValue.Color.B, oldValue.Color.A);
-            oldColor = oldColor / 255f;
-            newColor = newColor / 255f;
-            var deltaColor = newColor - oldColor;
-            var premultOV = new Vector4(oldColor.W, oldColor.W, oldColor.W, 1);
-            var premultNV = new Vector4(newColor.W, newColor.W, newColor.W, 1);
-
-            oldColor *= premultOV;
-            newColor *= premultNV;
-
-            return progress
-            .Select(p =>
-            {
-                var time = (float)Easing.Ease(p);
-                var interpolatedColor = (deltaColor * time) + oldColor;
-                return new SolidColorBrush(Color.FromVector4(interpolatedColor, true));
-            });
-        }
-    }
-}