slideshow/source/engine/transitions/pinwheelwipe.cxx

   1 /*************************************************************************
   2  *
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * Copyright 2008 by Sun Microsystems, Inc.
   6  *
   7  * OpenOffice.org - a multi-platform office productivity suite
   8  *
   9  * $RCSfile: pinwheelwipe.cxx,v $
  10  * $Revision: 1.6 $
  11  *
  12  * This file is part of OpenOffice.org.
  13  *
  14  * OpenOffice.org is free software: you can redistribute it and/or modify
  15  * it under the terms of the GNU Lesser General Public License version 3
  16  * only, as published by the Free Software Foundation.
  17  *
  18  * OpenOffice.org is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU Lesser General Public License version 3 for more details
  22  * (a copy is included in the LICENSE file that accompanied this code).
  23  *
  24  * You should have received a copy of the GNU Lesser General Public License
  25  * version 3 along with OpenOffice.org.  If not, see
  26  * <http://www.openoffice.org/license.html>
  27  * for a copy of the LGPLv3 License.
  28  *
  29  ************************************************************************/
  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_slideshow.hxx"
  33
  34 #include <canvas/debug.hxx>
  35 #include <basegfx/matrix/b2dhommatrix.hxx>
  36 #include <basegfx/numeric/ftools.hxx>
  37 #include "clockwipe.hxx"
  38 #include "pinwheelwipe.hxx"
  39
  40
  41 namespace slideshow {
  42 namespace internal {
  43
  44 ::basegfx::B2DPolyPolygon PinWheelWipe::operator () ( double t )
  45 {
  46     ::basegfx::B2DHomMatrix aTransform;
  47     ::basegfx::B2DPolygon poly( ClockWipe::calcCenteredClock(
  48                                     t / m_blades,
  49                                     2.0 /* max edge when rotating */ ) );
  50     ::basegfx::B2DPolyPolygon res;
  51     for ( sal_Int32 i = m_blades; i--; )
  52     {
  53         aTransform.identity();
  54         aTransform.rotate( (i * 2.0 * M_PI) / m_blades );
  55         ::basegfx::B2DPolygon p(poly);
  56         p.transform( aTransform );
  57         res.append( p );
  58     }
  59     aTransform.identity();
  60     aTransform.scale( 0.5, 0.5 );
  61     aTransform.translate( 0.5, 0.5 );
  62     res.transform( aTransform );
  63     return res;
  64 }
  65
  66 }
  67 }