From aad53d51d1a0bebd86f44adbe4ecf2b470423369 Mon Sep 17 00:00:00 2001
From: "J. Neugebauer" <ngb@helmholtz-bi.de>
Date: Sun, 17 Jul 2022 08:54:34 +0200
Subject: [PATCH] FadeAnimation erstellt

---
 .../schule/ngb/zm/anim/FadeAnimation.java     | 44 +++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 src/main/java/schule/ngb/zm/anim/FadeAnimation.java

diff --git a/src/main/java/schule/ngb/zm/anim/FadeAnimation.java b/src/main/java/schule/ngb/zm/anim/FadeAnimation.java
new file mode 100644
index 0000000..ba230bd
--- /dev/null
+++ b/src/main/java/schule/ngb/zm/anim/FadeAnimation.java
@@ -0,0 +1,44 @@
+package schule.ngb.zm.anim;
+
+import schule.ngb.zm.Color;
+import schule.ngb.zm.Constants;
+import schule.ngb.zm.shapes.Shape;
+
+import java.util.function.DoubleUnaryOperator;
+
+@SuppressWarnings( "unused" )
+public class FadeAnimation extends Animation<Shape> {
+
+	public static final int FADE_IN = 255;
+
+	public static final int FADE_OUT = 0;
+
+	private Shape object;
+
+	private Color fill, stroke;
+
+	private int fillAlpha, strokeAlpha, tAlpha;
+
+	public FadeAnimation( Shape object, int alpha, int runtime, DoubleUnaryOperator easing ) {
+		super(runtime, easing);
+
+		this.object = object;
+		fill = object.getFillColor();
+		fillAlpha = fill.getAlpha();
+		stroke = object.getStrokeColor();
+		strokeAlpha = stroke.getAlpha();
+		tAlpha = alpha;
+	}
+
+	@Override
+	public Shape getAnimationTarget() {
+		return object;
+	}
+
+	@Override
+	public void interpolate( double e ) {
+		object.setFillColor(new Color(fill, (int) Constants.interpolate(fillAlpha, tAlpha, e)));
+		object.setStrokeColor(new Color(stroke, (int) Constants.interpolate(strokeAlpha, tAlpha, e)));
+	}
+
+}