clockwipe.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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 *   ownership. The ASF licenses this file to you under the Apache
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#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/point/b2dpoint.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>
#include "clockwipe.hxx"
 
 
namespace slideshow::internal {
 
::basegfx::B2DPolygon ClockWipe::calcCenteredClock( double t, double e )
{
    ::basegfx::B2DPolygon poly;
    ::basegfx::B2DHomMatrix aTransform;
    aTransform.rotate( t * 2.0 * M_PI );
    const double MAX_EDGE = 2.0;
    ::basegfx::B2DPoint p( 0.0, -MAX_EDGE );
    p *= aTransform;
    poly.append( p );
    if (t >= 0.875)
        poly.append( ::basegfx::B2DPoint( -e, -e ) );
    if (t >= 0.625)
        poly.append( ::basegfx::B2DPoint( -e, e ) );
    if (t >= 0.375)
        poly.append( ::basegfx::B2DPoint( e, e ) );
    if (t >= 0.125)
        poly.append( ::basegfx::B2DPoint( e, -e ) );
    poly.append( ::basegfx::B2DPoint( 0.0, -e ) );
    poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) );
    poly.setClosed(true);
    return poly;
}
 
::basegfx::B2DPolyPolygon ClockWipe::operator () ( double t )
{
    const basegfx::B2DHomMatrix aTransform(basegfx::utils::createScaleTranslateB2DHomMatrix(0.5, 0.5, 0.5, 0.5));
    ::basegfx::B2DPolygon poly( calcCenteredClock(t) );
    poly.transform( aTransform );
    return ::basegfx::B2DPolyPolygon(poly);
}
 
}
 
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