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/numeric/ftools.hxx>
  24 #include <basegfx/matrix/b2dhommatrixtools.hxx>
  25 #include "transitiontools.hxx"
  26 #include "zigzagwipe.hxx"
  27
  28
  29 namespace slideshow {
  30 namespace internal {
  31
  32 ZigZagWipe::ZigZagWipe( sal_Int32 nZigs ) : m_zigEdge( 1.0 / nZigs )
  33 {
  34     const double d = m_zigEdge;
  35     const double d2 = (d / 2.0);
  36     m_stdZigZag.append( ::basegfx::B2DPoint( -1.0 - d, -d ) );
  37     m_stdZigZag.append( ::basegfx::B2DPoint( -1.0 - d, 1.0 + d ) );
  38     m_stdZigZag.append( ::basegfx::B2DPoint( -d, 1.0 + d ) );
  39     for ( sal_Int32 pos = (nZigs + 2); pos--; ) {
  40         m_stdZigZag.append( ::basegfx::B2DPoint( 0.0, ((pos - 1) * d) + d2 ) );
  41         m_stdZigZag.append( ::basegfx::B2DPoint( -d, (pos - 1) * d ) );
  42     }
  43     m_stdZigZag.setClosed(true);
  44 }
  45
  46 ::basegfx::B2DPolyPolygon ZigZagWipe::operator () ( double t )
  47 {
  48     ::basegfx::B2DPolyPolygon res(m_stdZigZag);
  49     res.transform(basegfx::tools::createTranslateB2DHomMatrix((1.0 + m_zigEdge) * t, 0.0));
  50     return res;
  51 }
  52
  53 ::basegfx::B2DPolyPolygon BarnZigZagWipe::operator () ( double t )
  54 {
  55     ::basegfx::B2DPolyPolygon res( createUnitRect() );
  56     ::basegfx::B2DPolygon poly( m_stdZigZag );
  57     poly.flip();
  58     basegfx::B2DHomMatrix aTransform(basegfx::tools::createTranslateB2DHomMatrix(
  59         (1.0 + m_zigEdge) * (1.0 - t) / 2.0, 0.0));
  60     poly.transform( aTransform );
  61     res.append( poly );
  62     aTransform.scale( -1.0, 1.0 );
  63     aTransform.translate( 1.0, m_zigEdge / 2.0 );
  64     poly = m_stdZigZag;
  65     poly.transform( aTransform );
  66     res.append( poly );
  67     return res;
  68 }
  69
  70 }
  71 }
  72
  73 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */