add FadeAnimation

1 files changed, 56 insertions, 0 deletions

diff --git a/core/src/ch/asynk/gdx/boardgame/animations/FadeAnimation.java b/core/src/ch/asynk/gdx/boardgame/animations/FadeAnimation.java
new file mode 100644
index 0000000..90b5299
--- /dev/null
+++ b/core/src/ch/asynk/gdx/boardgame/animations/FadeAnimation.java
@@ -0,0 +1,56 @@
+package ch.asynk.gdx.boardgame.animations;
+
+import com.badlogic.gdx.utils.Pool;
+
+import ch.asynk.gdx.boardgame.Drawable;
+
+public class FadeAnimation extends TimedAnimation implements Pool.Poolable
+{
+    private static final Pool<FadeAnimation> fadeAnimationPool = new Pool<FadeAnimation>()
+    {
+        @Override protected FadeAnimation newObject()
+        {
+            return new FadeAnimation();
+        }
+    };
+
+    public static FadeAnimation obtain(Drawable drawable, float from, float to, float duration)
+    {
+        FadeAnimation a = fadeAnimationPool.obtain();
+
+        a.from = from;
+        a.to = to;
+        a.drawable = drawable;
+        a.setDuration(duration);
+
+        return a;
+    }
+
+    private float from;
+    private float to;
+    private Drawable drawable;
+
+    private FadeAnimation()
+    {
+    }
+
+    @Override public void dispose()
+    {
+        fadeAnimationPool.free(this);
+    }
+
+    @Override public void begin()
+    {
+        drawable.setAlpha(from);
+    }
+
+    @Override public void end()
+    {
+        drawable.setAlpha(to);
+    }
+
+    @Override public void update(float delta)
+    {
+        drawable.setAlpha(from + ((to - from) * percent));
+    }
+}