AOO410/main/slideshow/source/engine/transitions/clockwipe.cxx

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// 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 "clockwipe.hxx"


namespace slideshow {
namespace 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::tools::createScaleTranslateB2DHomMatrix(0.5, 0.5, 0.5, 0.5));
    ::basegfx::B2DPolygon poly( calcCenteredClock(t) );
    poly.transform( aTransform );
    return ::basegfx::B2DPolyPolygon(poly);
}

}
}