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/* -*- 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/point/b2dpoint.hxx>
#include <basegfx/numeric/ftools.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>
#include "waterfallwipe.hxx"
#include "transitiontools.hxx"
namespace slideshow::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::utils::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);
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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