1 files changed, 62 insertions, 0 deletions
diff --git a/slideshow/source/engine/transitions/clockwipe.cxx b/slideshow/source/engine/transitions/clockwipe.cxx
new file mode 100644
index 000000000..bba29bfca
--- /dev/null
+++ b/slideshow/source/engine/transitions/clockwipe.cxx
@@ -0,0 +1,62 @@
+/* -*- 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 .
+ */
+
+
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/point/b2dpoint.hxx>
+#include <basegfx/matrix/b2dhommatrixtools.hxx>
+#include "clockwipe.hxx"
+
+
+namespace slideshow::internal {
+
+::basegfx::B2DPolygon ClockWipe::calcCenteredClock( double t, double e )
+{
+    ::basegfx::B2DPolygon poly;
+    ::basegfx::B2DHomMatrix aTransform;
+    aTransform.rotate( t * 2.0 * M_PI );
+    const double MAX_EDGE = 2.0;
+    ::basegfx::B2DPoint p( 0.0, -MAX_EDGE );
+    p *= aTransform;
+    poly.append( p );
+    if (t >= 0.875)
+        poly.append( ::basegfx::B2DPoint( -e, -e ) );
+    if (t >= 0.625)
+        poly.append( ::basegfx::B2DPoint( -e, e ) );
+    if (t >= 0.375)
+        poly.append( ::basegfx::B2DPoint( e, e ) );
+    if (t >= 0.125)
+        poly.append( ::basegfx::B2DPoint( e, -e ) );
+    poly.append( ::basegfx::B2DPoint( 0.0, -e ) );
+    poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) );
+    poly.setClosed(true);
+    return poly;
+}
+
+::basegfx::B2DPolyPolygon ClockWipe::operator () ( double t )
+{
+    const basegfx::B2DHomMatrix aTransform(basegfx::utils::createScaleTranslateB2DHomMatrix(0.5, 0.5, 0.5, 0.5));
+    ::basegfx::B2DPolygon poly( calcCenteredClock(t) );
+    poly.transform( aTransform );
+    return ::basegfx::B2DPolyPolygon(poly);
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */