diff options
Diffstat (limited to 'slideshow/source/engine/transitions/snakewipe.cxx')
-rw-r--r-- | slideshow/source/engine/transitions/snakewipe.cxx | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/slideshow/source/engine/transitions/snakewipe.cxx b/slideshow/source/engine/transitions/snakewipe.cxx new file mode 100644 index 000000000000..a93e80430af8 --- /dev/null +++ b/slideshow/source/engine/transitions/snakewipe.cxx @@ -0,0 +1,247 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * 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/point/b2dpoint.hxx> +#include <basegfx/polygon/b2dpolygon.hxx> +#include <basegfx/matrix/b2dhommatrixtools.hxx> +#include "snakewipe.hxx" +#include "transitiontools.hxx" + + +namespace slideshow { +namespace internal { + +SnakeWipe::SnakeWipe( sal_Int32 nElements, bool diagonal, bool flipOnYAxis ) + : m_sqrtElements( static_cast<sal_Int32>( + sqrt( static_cast<double>(nElements) ) ) ), + m_elementEdge( 1.0 / m_sqrtElements ), + m_diagonal(diagonal), + m_flipOnYAxis(flipOnYAxis) +{ +} + +::basegfx::B2DPolyPolygon SnakeWipe::calcSnake( double t ) const +{ + ::basegfx::B2DPolyPolygon res; + const double area = (t * m_sqrtElements * m_sqrtElements); + const sal_Int32 line_ = (static_cast<sal_Int32>(area) / m_sqrtElements); + const double line = ::basegfx::pruneScaleValue( + static_cast<double>(line_) / m_sqrtElements ); + const double col = ::basegfx::pruneScaleValue( + (area - (line_ * m_sqrtElements)) / m_sqrtElements ); + + if (! ::basegfx::fTools::equalZero( line )) { + ::basegfx::B2DPolygon poly; + poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) ); + poly.append( ::basegfx::B2DPoint( 0.0, line ) ); + poly.append( ::basegfx::B2DPoint( 1.0, line ) ); + poly.append( ::basegfx::B2DPoint( 1.0, 0.0 ) ); + poly.setClosed(true); + res.append(poly); + } + if (! ::basegfx::fTools::equalZero( col )) + { + double offset = 0.0; + if ((line_ & 1) == 1) { + // odd line: => right to left + offset = (1.0 - col); + } + ::basegfx::B2DPolygon poly; + poly.append( ::basegfx::B2DPoint( offset, line ) ); + poly.append( ::basegfx::B2DPoint( offset, + line + m_elementEdge ) ); + poly.append( ::basegfx::B2DPoint( offset + col, + line + m_elementEdge ) ); + poly.append( ::basegfx::B2DPoint( offset + col, line ) ); + poly.setClosed(true); + res.append(poly); + } + + return res; +} + +::basegfx::B2DPolyPolygon SnakeWipe::calcHalfDiagonalSnake( + double t, bool in ) const +{ + ::basegfx::B2DPolyPolygon res; + + if (in) { + const double sqrtArea2 = sqrt( t * m_sqrtElements * m_sqrtElements ); + const double edge = ::basegfx::pruneScaleValue( + static_cast<double>( static_cast<sal_Int32>(sqrtArea2) ) / + m_sqrtElements ); + + ::basegfx::B2DPolygon poly; + if (! ::basegfx::fTools::equalZero( edge )) { + poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) ); + poly.append( ::basegfx::B2DPoint( 0.0, edge ) ); + poly.append( ::basegfx::B2DPoint( edge, 0.0 ) ); + poly.setClosed(true); + res.append(poly); + } + const double a = (M_SQRT1_2 / m_sqrtElements); + const double d = (sqrtArea2 - static_cast<sal_Int32>(sqrtArea2)); + const double len = (t * M_SQRT2 * d); + const double height = ::basegfx::pruneScaleValue( M_SQRT1_2 / m_sqrtElements ); + poly.clear(); + poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) ); + poly.append( ::basegfx::B2DPoint( 0.0, height ) ); + poly.append( ::basegfx::B2DPoint( len + a, height ) ); + poly.append( ::basegfx::B2DPoint( len + a, 0.0 ) ); + poly.setClosed(true); + ::basegfx::B2DHomMatrix aTransform; + + if ((static_cast<sal_Int32>(sqrtArea2) & 1) == 1) + { + // odd line + aTransform = basegfx::tools::createRotateB2DHomMatrix(M_PI_2 + M_PI_4); + aTransform.translate(edge + m_elementEdge, 0.0); + } + else + { + aTransform = basegfx::tools::createTranslateB2DHomMatrix(-a, 0.0); + aTransform.rotate( -M_PI_4 ); + aTransform.translate( 0.0, edge ); + } + + poly.transform( aTransform ); + res.append(poly); + } + else // out + { + const double sqrtArea2 = sqrt( t * m_sqrtElements * m_sqrtElements ); + const double edge = ::basegfx::pruneScaleValue( + static_cast<double>( static_cast<sal_Int32>(sqrtArea2) ) / + m_sqrtElements ); + + ::basegfx::B2DPolygon poly; + if (! ::basegfx::fTools::equalZero( edge )) { + poly.append( ::basegfx::B2DPoint( 0.0, 1.0 ) ); + poly.append( ::basegfx::B2DPoint( edge, 1.0 ) ); + poly.append( ::basegfx::B2DPoint( 1.0, edge ) ); + poly.append( ::basegfx::B2DPoint( 1.0, 0.0 ) ); + poly.setClosed(true); + res.append(poly); + } + const double a = (M_SQRT1_2 / m_sqrtElements); + const double d = (sqrtArea2 - static_cast<sal_Int32>(sqrtArea2)); + const double len = ((1.0 - t) * M_SQRT2 * d); + const double height = ::basegfx::pruneScaleValue( M_SQRT1_2 / m_sqrtElements ); + poly.clear(); + poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) ); + poly.append( ::basegfx::B2DPoint( 0.0, height ) ); + poly.append( ::basegfx::B2DPoint( len + a, height ) ); + poly.append( ::basegfx::B2DPoint( len + a, 0.0 ) ); + poly.setClosed(true); + ::basegfx::B2DHomMatrix aTransform; + + if ((static_cast<sal_Int32>(sqrtArea2) & 1) == 1) + { + // odd line + aTransform = basegfx::tools::createTranslateB2DHomMatrix(0.0, -height); + aTransform.rotate( M_PI_2 + M_PI_4 ); + aTransform.translate( 1.0, edge ); + } + else + { + aTransform = basegfx::tools::createRotateB2DHomMatrix(-M_PI_4); + aTransform.translate( edge, 1.0 ); + } + poly.transform( aTransform ); + res.append(poly); + } + + return res; +} + +::basegfx::B2DPolyPolygon SnakeWipe::operator () ( double t ) +{ + ::basegfx::B2DPolyPolygon res; + if (m_diagonal) + { + if (t >= 0.5) { + res.append( calcHalfDiagonalSnake( 1.0, true ) ); + res.append( calcHalfDiagonalSnake( 2.0 * (t - 0.5), false ) ); + } + else + res.append( calcHalfDiagonalSnake( 2.0 * t, true ) ); + } + else + res = calcSnake(t); + + return m_flipOnYAxis ? flipOnYAxis(res) : res; +} + +::basegfx::B2DPolyPolygon ParallelSnakesWipe::operator () ( double t ) +{ + ::basegfx::B2DPolyPolygon res; + if (m_diagonal) + { + OSL_ASSERT( m_opposite ); + ::basegfx::B2DPolyPolygon half( + calcHalfDiagonalSnake( t, false /* out */ ) ); + // flip on x axis and rotate 90 degrees: + basegfx::B2DHomMatrix aTransform(basegfx::tools::createScaleB2DHomMatrix(1.0, -1.0)); + aTransform.translate( -0.5, 0.5 ); + aTransform.rotate( M_PI_2 ); + aTransform.translate( 0.5, 0.5 ); + half.transform( aTransform ); + half.flip(); + res.append( half ); + + // rotate 180 degrees: + aTransform = basegfx::tools::createTranslateB2DHomMatrix(-0.5, -0.5); + aTransform.rotate( M_PI ); + aTransform.translate( 0.5, 0.5 ); + half.transform( aTransform ); + res.append( half ); + } + else + { + ::basegfx::B2DPolyPolygon half( calcSnake( t / 2.0 ) ); + // rotate 90 degrees: + basegfx::B2DHomMatrix aTransform(basegfx::tools::createTranslateB2DHomMatrix(-0.5, -0.5)); + aTransform.rotate( M_PI_2 ); + aTransform.translate( 0.5, 0.5 ); + half.transform( aTransform ); + res.append( flipOnYAxis(half) ); + res.append( m_opposite ? flipOnXAxis(half) : half ); + } + + return m_flipOnYAxis ? flipOnYAxis(res) : res; +} + +} +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |