slideshow/source/engine/transitions/zigzagwipe.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20
  21 #include <basegfx/matrix/b2dhommatrix.hxx>
  22 #include <basegfx/point/b2dpoint.hxx>
  23 #include <basegfx/matrix/b2dhommatrixtools.hxx>
  24 #include "transitiontools.hxx"
  25 #include "zigzagwipe.hxx"
  26
  27
  28 namespace slideshow::internal {
  29
  30 ZigZagWipe::ZigZagWipe( sal_Int32 nZigs ) : m_zigEdge( 1.0 / nZigs )
  31 {
  32     const double d = m_zigEdge;
  33     const double d2 = d / 2.0;
  34     m_stdZigZag.append( ::basegfx::B2DPoint( -1.0 - d, -d ) );
  35     m_stdZigZag.append( ::basegfx::B2DPoint( -1.0 - d, 1.0 + d ) );
  36     m_stdZigZag.append( ::basegfx::B2DPoint( -d, 1.0 + d ) );
  37     for ( sal_Int32 pos = nZigs + 2; pos--; ) {
  38         m_stdZigZag.append( ::basegfx::B2DPoint( 0.0, ((pos - 1) * d) + d2 ) );
  39         m_stdZigZag.append( ::basegfx::B2DPoint( -d, (pos - 1) * d ) );
  40     }
  41     m_stdZigZag.setClosed(true);
  42 }
  43
  44 ::basegfx::B2DPolyPolygon ZigZagWipe::operator () ( double t )
  45 {
  46     ::basegfx::B2DPolyPolygon res(m_stdZigZag);
  47     res.transform(basegfx::utils::createTranslateB2DHomMatrix((1.0 + m_zigEdge) * t, 0.0));
  48     return res;
  49 }
  50
  51 ::basegfx::B2DPolyPolygon BarnZigZagWipe::operator () ( double t )
  52 {
  53     ::basegfx::B2DPolyPolygon res( createUnitRect() );
  54     ::basegfx::B2DPolygon poly( m_stdZigZag );
  55     poly.flip();
  56     basegfx::B2DHomMatrix aTransform(basegfx::utils::createTranslateB2DHomMatrix(
  57         (1.0 + m_zigEdge) * (1.0 - t) / 2.0, 0.0));
  58     poly.transform( aTransform );
  59     res.append( poly );
  60     aTransform.scale( -1.0, 1.0 );
  61     aTransform.translate( 1.0, m_zigEdge / 2.0 );
  62     poly = m_stdZigZag;
  63     poly.transform( aTransform );
  64     res.append( poly );
  65     return res;
  66 }
  67
  68 }
  69
  70 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */