1 files changed, 77 insertions, 0 deletions
diff --git a/sd/source/ui/slidesorter/inc/controller/SlsAnimationFunction.hxx b/sd/source/ui/slidesorter/inc/controller/SlsAnimationFunction.hxx
new file mode 100644
index 0000000000..b4847de1a0
--- /dev/null
+++ b/sd/source/ui/slidesorter/inc/controller/SlsAnimationFunction.hxx
@@ -0,0 +1,77 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <basegfx/point/b2dpoint.hxx>
+
+#include <functional>
+#include <vector>
+
+
+namespace sd::slidesorter::controller {
+
+class AnimationBezierFunction
+{
+public:
+    /** Create a cubic bezier curve whose start and end points are given
+        implicitly as P0=(0,0) and P3=(1,1).  The second control point is
+        implicitly given as P2=(1-nY1,1-nX1).
+    */
+    AnimationBezierFunction (
+        const double nX1,
+        const double nY1);
+
+    ::basegfx::B2DPoint operator() (const double nT);
+
+private:
+    const double mnX1;
+    const double mnY1;
+    const double mnX2;
+    const double mnY2;
+
+    static double EvaluateComponent (
+        const double nT,
+        const double nV1,
+        const double nV2);
+};
+
+/** Turn a parametric function into one whose y-Values depend on its
+    x-Values.  Note a lot of interpolation takes place.  The resulting
+    accuracy should be good enough for the purpose of acceleration
+    function for animations.
+*/
+class AnimationParametricFunction
+{
+public:
+    typedef ::std::function<basegfx::B2DPoint (double)> ParametricFunction;
+    AnimationParametricFunction (const ParametricFunction& rFunction);
+
+    double operator() (const double nX);
+
+private:
+    /** y-Values of the parametric function given to the constructor
+        evaluated (and interpolated) for evenly spaced x-Values.
+    */
+    ::std::vector<double> maY;
+};
+
+} // end of namespace ::sd::slidesorter::controller
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */