1 files changed, 97 insertions, 0 deletions
diff --git a/slideshow/source/engine/transitions/randomwipe.cxx b/slideshow/source/engine/transitions/randomwipe.cxx
new file mode 100644
index 000000000000..424d53093d09
--- /dev/null
+++ b/slideshow/source/engine/transitions/randomwipe.cxx
@@ -0,0 +1,97 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+// MARKER(update_precomp.py): autogen include statement, do not remove
+#include "precompiled_slideshow.hxx"
+
+#include <canvas/debug.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/numeric/ftools.hxx>
+#include <basegfx/matrix/b2dhommatrixtools.hxx>
+#include "randomwipe.hxx"
+#include "tools.hxx"
+
+
+namespace slideshow {
+namespace internal {
+
+RandomWipe::RandomWipe( sal_Int32 nElements, bool randomBars )
+    : m_positions( new ::basegfx::B2DPoint[ nElements ] ),
+      m_nElements( nElements ),
+      m_rect( createUnitRect() )
+{
+    ::basegfx::B2DHomMatrix aTransform;
+    if (randomBars)
+    {
+        double edge = (1.0 / nElements);
+        for ( sal_Int32 pos = nElements; pos--; )
+            m_positions[ pos ].setY( ::basegfx::pruneScaleValue( pos * edge ) );
+        aTransform.scale( 1.0, ::basegfx::pruneScaleValue(edge) );
+    }
+    else // dissolve effect
+    {
+        sal_Int32 sqrtElements = static_cast<sal_Int32>(
+            sqrt( static_cast<double>(nElements) ) );
+        double edge = (1.0 / sqrtElements);
+        for ( sal_Int32 pos = nElements; pos--; ) {
+            m_positions[ pos ] = ::basegfx::B2DPoint(
+                ::basegfx::pruneScaleValue( (pos % sqrtElements) * edge ),
+                ::basegfx::pruneScaleValue( (pos / sqrtElements) * edge ) );
+        }
+        const double pedge = ::basegfx::pruneScaleValue(edge);
+        aTransform.scale( pedge, pedge );
+    }
+    m_rect.transform( aTransform );
+
+    // mix up:
+    for ( sal_Int32 pos1 = nElements ; pos1-- ; )
+    {
+        const sal_Int32 pos2 = getRandomOrdinal(pos1+1);
+        const ::basegfx::B2DPoint point( m_positions[ pos1 ] );
+        m_positions[ pos1 ] = m_positions[ pos2 ];
+        m_positions[ pos2 ] = point;
+    }
+}
+
+::basegfx::B2DPolyPolygon RandomWipe::operator () ( double t )
+{
+    ::basegfx::B2DPolyPolygon res;
+    for ( sal_Int32 pos = static_cast<sal_Int32>(t * m_nElements); pos--; )
+    {
+        ::basegfx::B2DPoint const & point = m_positions[ pos ];
+        ::basegfx::B2DPolygon poly( m_rect );
+        poly.transform(basegfx::tools::createTranslateB2DHomMatrix(point.getX(), point.getY()));
+        res.append( poly );
+    }
+    return res;
+}
+
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */