slideshow/source/engine/transitions/zigzagwipe.cxx

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  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/point/b2dpoint.hxx>
  37 #include <basegfx/numeric/ftools.hxx>
  38 #include "transitiontools.hxx"
  39 #include "zigzagwipe.hxx"
  40
  41
  42 namespace slideshow {
  43 namespace internal {
  44
  45 ZigZagWipe::ZigZagWipe( sal_Int32 nZigs ) : m_zigEdge( 1.0 / nZigs )
  46 {
  47     const double d = m_zigEdge;
  48     const double d2 = (d / 2.0);
  49     m_stdZigZag.append( ::basegfx::B2DPoint( -1.0 - d, -d ) );
  50     m_stdZigZag.append( ::basegfx::B2DPoint( -1.0 - d, 1.0 + d ) );
  51     m_stdZigZag.append( ::basegfx::B2DPoint( -d, 1.0 + d ) );
  52     for ( sal_Int32 pos = (nZigs + 2); pos--; ) {
  53         m_stdZigZag.append( ::basegfx::B2DPoint( 0.0, ((pos - 1) * d) + d2 ) );
  54         m_stdZigZag.append( ::basegfx::B2DPoint( -d, (pos - 1) * d ) );
  55     }
  56     m_stdZigZag.setClosed(true);
  57 }
  58
  59 ::basegfx::B2DPolyPolygon ZigZagWipe::operator () ( double t )
  60 {
  61     ::basegfx::B2DHomMatrix aTransform;
  62     aTransform.translate( (1.0 + m_zigEdge) * t, 0.0 );
  63     ::basegfx::B2DPolyPolygon res(m_stdZigZag);
  64     res.transform( aTransform );
  65     return res;
  66 }
  67
  68 ::basegfx::B2DPolyPolygon BarnZigZagWipe::operator () ( double t )
  69 {
  70     ::basegfx::B2DPolyPolygon res( createUnitRect() );
  71     ::basegfx::B2DPolygon poly( m_stdZigZag );
  72     poly.flip();
  73     ::basegfx::B2DHomMatrix aTransform;
  74     aTransform.translate( (1.0 + m_zigEdge) * (1.0 - t) / 2.0, 0.0 );
  75     poly.transform( aTransform );
  76     res.append( poly );
  77     aTransform.scale( -1.0, 1.0 );
  78     aTransform.translate( 1.0, m_zigEdge / 2.0 );
  79     poly = m_stdZigZag;
  80     poly.transform( aTransform );
  81     res.append( poly );
  82     return res;
  83 }
  84
  85 }
  86 }