slideshow/source/engine/transitions/pinwheelwipe.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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   9  * This file incorporates work covered by the following license notice:
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  12  *   contributor license agreements. See the NOTICE file distributed
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  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
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  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/numeric/ftools.hxx>
  24 #include <basegfx/matrix/b2dhommatrixtools.hxx>
  25 #include "clockwipe.hxx"
  26 #include "pinwheelwipe.hxx"
  27
  28
  29 namespace slideshow {
  30 namespace internal {
  31
  32 ::basegfx::B2DPolyPolygon PinWheelWipe::operator () ( double t )
  33 {
  34     ::basegfx::B2DPolygon poly( ClockWipe::calcCenteredClock(
  35                                     t / m_blades,
  36                                     2.0 /* max edge when rotating */ ) );
  37     ::basegfx::B2DPolyPolygon res;
  38     for ( sal_Int32 i = m_blades; i--; )
  39     {
  40         ::basegfx::B2DPolygon p(poly);
  41         p.transform(basegfx::tools::createRotateB2DHomMatrix((i * 2.0 * M_PI) / m_blades));
  42         res.append( p );
  43     }
  44     res.transform(basegfx::tools::createScaleTranslateB2DHomMatrix(0.5, 0.5, 0.5, 0.5));
  45     return res;
  46 }
  47
  48 }
  49 }
  50
  51 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */