fanwipe.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#include <basegfx/matrix/b2dhommatrixtools.hxx>
#include <sal/log.hxx>
#include "transitiontools.hxx"
#include "clockwipe.hxx"
#include "fanwipe.hxx"
 
 
namespace slideshow::internal {
 
::basegfx::B2DPolyPolygon FanWipe::operator () ( double t )
{
    ::basegfx::B2DPolyPolygon res;
    ::basegfx::B2DPolygon poly(
        ClockWipe::calcCenteredClock(
            t / ((m_center && m_single) ? 2.0 : 4.0) ) );
 
    res.append( poly );
    // flip on y-axis:
    poly.transform(basegfx::utils::createScaleB2DHomMatrix(-1.0, 1.0));
    poly.flip();
    res.append( poly );
 
    if (m_center)
    {
        res.transform(basegfx::utils::createScaleTranslateB2DHomMatrix(0.5, 0.5, 0.5, 0.5));
 
        if (! m_single)
            res.append( flipOnXAxis(res) );
    }
    else
    {
        SAL_WARN_IF( m_fanIn, "slideshow.opengl", "FanWipe: m_fanIn is true ?" );
        res.transform(basegfx::utils::createScaleTranslateB2DHomMatrix(0.5, 1.0, 0.5, 1.0));
    }
    return res;
}
 
}
 
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