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libreoffice/slideshow/source/engine/transitions/clockwipe.cxx

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/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: clockwipe.cxx,v $
*
* $Revision: 1.5 $
*
* last change: $Author: kz $ $Date: 2006-12-13 15:38:55 $
*
* The Contents of this file are made available subject to
* the terms of GNU Lesser General Public License Version 2.1.
*
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2005 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library 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 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
************************************************************************/
// 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 "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 )
{
::basegfx::B2DHomMatrix aTransform;
aTransform.scale( 0.5, 0.5 );
aTransform.translate( 0.5, 0.5 );
::basegfx::B2DPolygon poly( calcCenteredClock(t) );
poly.transform( aTransform );
return ::basegfx::B2DPolyPolygon(poly);
}
}
}