100 lines
3.4 KiB
C++
100 lines
3.4 KiB
C++
/*************************************************************************
|
|
*
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* Copyright 2008 by Sun Microsystems, Inc.
|
|
*
|
|
* OpenOffice.org - a multi-platform office productivity suite
|
|
*
|
|
* $RCSfile: randomwipe.cxx,v $
|
|
* $Revision: 1.7 $
|
|
*
|
|
* This file is part of OpenOffice.org.
|
|
*
|
|
* OpenOffice.org is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License version 3
|
|
* only, as published by the Free Software Foundation.
|
|
*
|
|
* OpenOffice.org 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 version 3 for more details
|
|
* (a copy is included in the LICENSE file that accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* version 3 along with OpenOffice.org. If not, see
|
|
* <http://www.openoffice.org/license.html>
|
|
* for a copy of the LGPLv3 License.
|
|
*
|
|
************************************************************************/
|
|
|
|
// 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/numeric/ftools.hxx>
|
|
#include "randomwipe.hxx"
|
|
#include "tools.hxx"
|
|
|
|
|
|
namespace slideshow {
|
|
namespace internal {
|
|
|
|
RandomWipe::RandomWipe( sal_Int32 nElements, bool randomBars )
|
|
: m_positions( new ::basegfx::B2DPoint[ nElements ] ),
|
|
m_nElements( nElements ),
|
|
m_rect( createUnitRect() )
|
|
{
|
|
::basegfx::B2DHomMatrix aTransform;
|
|
if (randomBars)
|
|
{
|
|
double edge = (1.0 / nElements);
|
|
for ( sal_Int32 pos = nElements; pos--; )
|
|
m_positions[ pos ].setY( ::basegfx::pruneScaleValue( pos * edge ) );
|
|
aTransform.scale( 1.0, ::basegfx::pruneScaleValue(edge) );
|
|
}
|
|
else // dissolve effect
|
|
{
|
|
sal_Int32 sqrtElements = static_cast<sal_Int32>(
|
|
sqrt( static_cast<double>(nElements) ) );
|
|
double edge = (1.0 / sqrtElements);
|
|
for ( sal_Int32 pos = nElements; pos--; ) {
|
|
m_positions[ pos ] = ::basegfx::B2DPoint(
|
|
::basegfx::pruneScaleValue( (pos % sqrtElements) * edge ),
|
|
::basegfx::pruneScaleValue( (pos / sqrtElements) * edge ) );
|
|
}
|
|
const double pedge = ::basegfx::pruneScaleValue(edge);
|
|
aTransform.scale( pedge, pedge );
|
|
}
|
|
m_rect.transform( aTransform );
|
|
|
|
// mix up:
|
|
for ( sal_Int32 i = (nElements / 2); i--; )
|
|
{
|
|
const sal_Int32 pos1 = getRandomOrdinal(nElements);
|
|
const sal_Int32 pos2 = getRandomOrdinal(nElements);
|
|
const ::basegfx::B2DPoint point( m_positions[ pos1 ] );
|
|
m_positions[ pos1 ] = m_positions[ pos2 ];
|
|
m_positions[ pos2 ] = point;
|
|
}
|
|
}
|
|
|
|
::basegfx::B2DPolyPolygon RandomWipe::operator () ( double t )
|
|
{
|
|
::basegfx::B2DPolyPolygon res;
|
|
for ( sal_Int32 pos = static_cast<sal_Int32>(t * m_nElements); pos--; )
|
|
{
|
|
::basegfx::B2DHomMatrix aTransform;
|
|
::basegfx::B2DPoint const & point = m_positions[ pos ];
|
|
aTransform.translate( point.getX(), point.getY() );
|
|
::basegfx::B2DPolygon poly( m_rect );
|
|
poly.transform( aTransform );
|
|
res.append( poly );
|
|
}
|
|
return res;
|
|
}
|
|
|
|
}
|
|
}
|