1 files changed, 77 insertions, 0 deletions
diff --git a/slideshow/source/engine/transitions/waterfallwipe.cxx b/slideshow/source/engine/transitions/waterfallwipe.cxx
new file mode 100644
index 000000000000..b7d55be55bcd
--- /dev/null
+++ b/slideshow/source/engine/transitions/waterfallwipe.cxx
@@ -0,0 +1,77 @@
+/*************************************************************************
+ *
+ * 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/point/b2dpoint.hxx>
+#include <basegfx/numeric/ftools.hxx>
+#include <basegfx/matrix/b2dhommatrixtools.hxx>
+#include "waterfallwipe.hxx"
+#include "transitiontools.hxx"
+
+
+namespace slideshow {
+namespace internal {
+
+WaterfallWipe::WaterfallWipe( sal_Int32 nElements, bool flipOnYAxis )
+    : m_flipOnYAxis( flipOnYAxis )
+{
+    const sal_Int32 sqrtElements = static_cast<sal_Int32>(
+        sqrt( static_cast<double>(nElements) ) );
+    const double elementEdge = (1.0 / sqrtElements);
+    m_waterfall.append( ::basegfx::B2DPoint( 0.0, -1.0 ) );
+    for ( sal_Int32 pos = sqrtElements; pos--; )
+    {
+        const sal_Int32 xPos = (sqrtElements - pos - 1);
+        const double yPos = ::basegfx::pruneScaleValue( ((pos + 1) * elementEdge) - 1.0 );
+        m_waterfall.append( ::basegfx::B2DPoint(
+                                ::basegfx::pruneScaleValue( xPos * elementEdge ),
+                                yPos ) );
+        m_waterfall.append( ::basegfx::B2DPoint(
+                                ::basegfx::pruneScaleValue( (xPos + 1) * elementEdge ),
+                                yPos ) );
+    }
+    m_waterfall.append( ::basegfx::B2DPoint( 1.0, -1.0 ) );
+    m_waterfall.setClosed(true);
+}
+
+::basegfx::B2DPolyPolygon WaterfallWipe::operator () ( double t )
+{
+    ::basegfx::B2DPolygon poly( m_waterfall );
+    poly.transform(basegfx::tools::createTranslateB2DHomMatrix(0.0, ::basegfx::pruneScaleValue(2.0 * t)));
+    poly.setB2DPoint( 0, ::basegfx::B2DPoint( 0.0, -1.0 ) );
+    poly.setB2DPoint( poly.count()-1, ::basegfx::B2DPoint( 1.0, -1.0 ) );
+
+    return m_flipOnYAxis ? flipOnYAxis( ::basegfx::B2DPolyPolygon(poly) )
+                         : ::basegfx::B2DPolyPolygon(poly);
+}
+
+}
+}