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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: waterfallwipe.cxx,v $
* $Revision: 1.6 $
*
* 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 "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 );
::basegfx::B2DHomMatrix aTransform;
aTransform.translate( 0.0, ::basegfx::pruneScaleValue( 2.0 * t ) );
poly.transform( aTransform );
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);
}
}
}
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