124 lines
4.2 KiB
C++
124 lines
4.2 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
/*
|
|
* This file is part of the LibreOffice project.
|
|
*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
*
|
|
* This file incorporates work covered by the following license notice:
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed
|
|
* with this work for additional information regarding copyright
|
|
* ownership. The ASF licenses this file to you under the Apache
|
|
* License, Version 2.0 (the "License"); you may not use this file
|
|
* except in compliance with the License. You may obtain a copy of
|
|
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
|
|
*/
|
|
|
|
|
|
#include "spiralwipe.hxx"
|
|
#include "transitiontools.hxx"
|
|
|
|
#include <basegfx/matrix/b2dhommatrix.hxx>
|
|
#include <basegfx/polygon/b2dpolygon.hxx>
|
|
#include <basegfx/numeric/ftools.hxx>
|
|
#include <basegfx/matrix/b2dhommatrixtools.hxx>
|
|
|
|
|
|
namespace slideshow::internal {
|
|
|
|
SpiralWipe::SpiralWipe( sal_Int32 nElements, bool flipOnYAxis )
|
|
: m_elements(nElements),
|
|
m_sqrtElements( static_cast<sal_Int32>(
|
|
sqrt( static_cast<double>(nElements) ) ) ),
|
|
m_flipOnYAxis(flipOnYAxis)
|
|
{
|
|
}
|
|
|
|
::basegfx::B2DPolyPolygon SpiralWipe::calcNegSpiral( double t ) const
|
|
{
|
|
const double area = t * m_elements;
|
|
const double e = sqrt(area) / 2.0;
|
|
const sal_Int32 edge = static_cast<sal_Int32>(e) * 2;
|
|
|
|
basegfx::B2DHomMatrix aTransform(basegfx::utils::createTranslateB2DHomMatrix(-0.5, -0.5));
|
|
const double edge_ = ::basegfx::pruneScaleValue(
|
|
static_cast<double>(edge) / m_sqrtElements );
|
|
aTransform.scale( edge_, edge_ );
|
|
aTransform.translate( 0.5, 0.5 );
|
|
::basegfx::B2DPolygon poly( createUnitRect() );
|
|
poly.transform( aTransform );
|
|
::basegfx::B2DPolyPolygon res(poly);
|
|
|
|
if (! ::basegfx::fTools::equalZero( 1.0 - t )) {
|
|
const sal_Int32 edge1 = edge + 1;
|
|
sal_Int32 len = static_cast<sal_Int32>( (e - (edge /2)) * edge1 * 4 );
|
|
double w = M_PI_2;
|
|
while (len > 0) {
|
|
const sal_Int32 alen = std::min(len, edge1);
|
|
len -= alen;
|
|
poly = createUnitRect();
|
|
aTransform = basegfx::utils::createScaleB2DHomMatrix(
|
|
::basegfx::pruneScaleValue( static_cast<double>(alen) / m_sqrtElements ),
|
|
::basegfx::pruneScaleValue( 1.0 / m_sqrtElements ) );
|
|
aTransform.translate(
|
|
- ::basegfx::pruneScaleValue(
|
|
static_cast<double>(edge / 2) / m_sqrtElements ),
|
|
::basegfx::pruneScaleValue(
|
|
static_cast<double>(edge / 2) / m_sqrtElements ) );
|
|
aTransform.rotate( w );
|
|
w -= M_PI_2;
|
|
aTransform.translate( 0.5, 0.5 );
|
|
poly.transform( aTransform );
|
|
res.append(poly);
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
::basegfx::B2DPolyPolygon SpiralWipe::operator () ( double t )
|
|
{
|
|
::basegfx::B2DPolyPolygon res( createUnitRect() );
|
|
::basegfx::B2DPolyPolygon innerSpiral( calcNegSpiral( 1.0 - t ) );
|
|
innerSpiral.flip();
|
|
res.append(innerSpiral);
|
|
if (m_flipOnYAxis)
|
|
return flipOnYAxis(res);
|
|
return res;
|
|
}
|
|
|
|
::basegfx::B2DPolyPolygon BoxSnakesWipe::operator () ( double t )
|
|
{
|
|
::basegfx::B2DPolyPolygon res( createUnitRect() );
|
|
::basegfx::B2DPolyPolygon innerSpiral( calcNegSpiral( 1.0 - t ) );
|
|
innerSpiral.flip();
|
|
|
|
if (m_fourBox) {
|
|
::basegfx::B2DHomMatrix aTransform;
|
|
aTransform.scale( 0.5, 0.5 );
|
|
innerSpiral.transform( aTransform );
|
|
res.append(innerSpiral);
|
|
res.append( flipOnXAxis(innerSpiral) );
|
|
innerSpiral = flipOnYAxis(innerSpiral);
|
|
res.append(innerSpiral);
|
|
res.append( flipOnXAxis(innerSpiral) );
|
|
}
|
|
else {
|
|
::basegfx::B2DHomMatrix aTransform;
|
|
aTransform.scale( 1.0, 0.5 );
|
|
innerSpiral.transform( aTransform );
|
|
res.append(innerSpiral);
|
|
res.append( flipOnXAxis(innerSpiral) );
|
|
}
|
|
|
|
if (m_flipOnYAxis)
|
|
return flipOnYAxis(res);
|
|
return res;
|
|
}
|
|
|
|
}
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|