78 lines
3.0 KiB
C++
78 lines
3.0 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/point/b2dpoint.hxx>
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#include <basegfx/numeric/ftools.hxx>
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#include <basegfx/matrix/b2dhommatrixtools.hxx>
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#include "waterfallwipe.hxx"
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#include "transitiontools.hxx"
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namespace slideshow {
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namespace internal {
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WaterfallWipe::WaterfallWipe( sal_Int32 nElements, bool flipOnYAxis )
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: m_flipOnYAxis( flipOnYAxis )
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{
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const sal_Int32 sqrtElements = static_cast<sal_Int32>(
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sqrt( static_cast<double>(nElements) ) );
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const double elementEdge = (1.0 / sqrtElements);
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m_waterfall.append( ::basegfx::B2DPoint( 0.0, -1.0 ) );
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for ( sal_Int32 pos = sqrtElements; pos--; )
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{
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const sal_Int32 xPos = (sqrtElements - pos - 1);
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const double yPos = ::basegfx::pruneScaleValue( ((pos + 1) * elementEdge) - 1.0 );
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m_waterfall.append( ::basegfx::B2DPoint(
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::basegfx::pruneScaleValue( xPos * elementEdge ),
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yPos ) );
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m_waterfall.append( ::basegfx::B2DPoint(
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::basegfx::pruneScaleValue( (xPos + 1) * elementEdge ),
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yPos ) );
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}
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m_waterfall.append( ::basegfx::B2DPoint( 1.0, -1.0 ) );
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m_waterfall.setClosed(true);
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}
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::basegfx::B2DPolyPolygon WaterfallWipe::operator () ( double t )
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{
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::basegfx::B2DPolygon poly( m_waterfall );
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poly.transform(basegfx::tools::createTranslateB2DHomMatrix(0.0, ::basegfx::pruneScaleValue(2.0 * t)));
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poly.setB2DPoint( 0, ::basegfx::B2DPoint( 0.0, -1.0 ) );
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poly.setB2DPoint( poly.count()-1, ::basegfx::B2DPoint( 1.0, -1.0 ) );
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return m_flipOnYAxis ? flipOnYAxis( ::basegfx::B2DPolyPolygon(poly) )
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: ::basegfx::B2DPolyPolygon(poly);
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}
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}
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}
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