95 lines
3.3 KiB
C++
95 lines
3.3 KiB
C++
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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// MARKER(update_precomp.py): autogen include statement, do not remove
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#include "precompiled_slideshow.hxx"
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#include <canvas/debug.hxx>
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#include <basegfx/matrix/b2dhommatrix.hxx>
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#include <basegfx/numeric/ftools.hxx>
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#include <basegfx/matrix/b2dhommatrixtools.hxx>
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#include "randomwipe.hxx"
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#include "tools.hxx"
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namespace slideshow {
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namespace internal {
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RandomWipe::RandomWipe( sal_Int32 nElements, bool randomBars )
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: m_positions( new ::basegfx::B2DPoint[ nElements ] ),
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m_nElements( nElements ),
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m_rect( createUnitRect() )
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{
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::basegfx::B2DHomMatrix aTransform;
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if (randomBars)
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{
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double edge = (1.0 / nElements);
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for ( sal_Int32 pos = nElements; pos--; )
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m_positions[ pos ].setY( ::basegfx::pruneScaleValue( pos * edge ) );
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aTransform.scale( 1.0, ::basegfx::pruneScaleValue(edge) );
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}
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else // dissolve effect
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{
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sal_Int32 sqrtElements = static_cast<sal_Int32>(
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sqrt( static_cast<double>(nElements) ) );
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double edge = (1.0 / sqrtElements);
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for ( sal_Int32 pos = nElements; pos--; ) {
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m_positions[ pos ] = ::basegfx::B2DPoint(
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::basegfx::pruneScaleValue( (pos % sqrtElements) * edge ),
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::basegfx::pruneScaleValue( (pos / sqrtElements) * edge ) );
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}
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const double pedge = ::basegfx::pruneScaleValue(edge);
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aTransform.scale( pedge, pedge );
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}
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m_rect.transform( aTransform );
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// mix up:
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for ( sal_Int32 pos1 = nElements ; pos1-- ; )
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{
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const sal_Int32 pos2 = getRandomOrdinal(pos1+1);
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const ::basegfx::B2DPoint point( m_positions[ pos1 ] );
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m_positions[ pos1 ] = m_positions[ pos2 ];
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m_positions[ pos2 ] = point;
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}
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}
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::basegfx::B2DPolyPolygon RandomWipe::operator () ( double t )
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{
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::basegfx::B2DPolyPolygon res;
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for ( sal_Int32 pos = static_cast<sal_Int32>(t * m_nElements); pos--; )
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{
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::basegfx::B2DPoint const & point = m_positions[ pos ];
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::basegfx::B2DPolygon poly( m_rect );
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poly.transform(basegfx::tools::createTranslateB2DHomMatrix(point.getX(), point.getY()));
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res.append( poly );
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}
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return res;
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}
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}
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}
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