slideshow/source/engine/transitions/clockwipe.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.
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   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 <canvas/debug.hxx>
  22 #include <basegfx/matrix/b2dhommatrix.hxx>
  23 #include <basegfx/point/b2dpoint.hxx>
  24 #include <basegfx/numeric/ftools.hxx>
  25 #include <basegfx/matrix/b2dhommatrixtools.hxx>
  26 #include "clockwipe.hxx"
  27
  28
  29 namespace slideshow {
  30 namespace internal {
  31
  32 ::basegfx::B2DPolygon ClockWipe::calcCenteredClock( double t, double e )
  33 {
  34     ::basegfx::B2DPolygon poly;
  35     ::basegfx::B2DHomMatrix aTransform;
  36     aTransform.rotate( t * 2.0 * M_PI );
  37     const double MAX_EDGE = 2.0;
  38     ::basegfx::B2DPoint p( 0.0, -MAX_EDGE );
  39     p *= aTransform;
  40     poly.append( p );
  41     if (t >= 0.875)
  42         poly.append( ::basegfx::B2DPoint( -e, -e ) );
  43     if (t >= 0.625)
  44         poly.append( ::basegfx::B2DPoint( -e, e ) );
  45     if (t >= 0.375)
  46         poly.append( ::basegfx::B2DPoint( e, e ) );
  47     if (t >= 0.125)
  48         poly.append( ::basegfx::B2DPoint( e, -e ) );
  49     poly.append( ::basegfx::B2DPoint( 0.0, -e ) );
  50     poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) );
  51     poly.setClosed(true);
  52     return poly;
  53 }
  54
  55 ::basegfx::B2DPolyPolygon ClockWipe::operator () ( double t )
  56 {
  57     const basegfx::B2DHomMatrix aTransform(basegfx::tools::createScaleTranslateB2DHomMatrix(0.5, 0.5, 0.5, 0.5));
  58     ::basegfx::B2DPolygon poly( calcCenteredClock(t) );
  59     poly.transform( aTransform );
  60     return ::basegfx::B2DPolyPolygon(poly);
  61 }
  62
  63 }
  64 }
  65
  66 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */