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27 
28 // MARKER(update_precomp.py): autogen include statement, do not remove
29 #include "precompiled_slideshow.hxx"
30 
31 #include <canvas/debug.hxx>
32 #include <basegfx/matrix/b2dhommatrix.hxx>
33 #include <basegfx/numeric/ftools.hxx>
34 #include <basegfx/matrix/b2dhommatrixtools.hxx>
35 #include "clockwipe.hxx"
36 #include "sweepwipe.hxx"
37 #include "transitiontools.hxx"
38 
39 
40 namespace slideshow {
41 namespace internal {
42 
43 ::basegfx::B2DPolyPolygon SweepWipe::operator () ( double t )
44 {
45     t /= 2.0;
46     if (! m_center)
47         t /= 2.0;
48     if (!m_single && !m_oppositeVertical)
49         t /= 2.0;
50 
51     ::basegfx::B2DPolygon poly( ClockWipe::calcCenteredClock( 0.25 + t ) );
52     ::basegfx::B2DHomMatrix aTransform;
53 
54     if (m_center)
55     {
56         aTransform = basegfx::tools::createTranslateB2DHomMatrix(0.5, 0.0);
57         poly.transform( aTransform );
58     }
59     ::basegfx::B2DPolyPolygon res(poly);
60 
61     if (! m_single)
62     {
63         if (m_oppositeVertical)
64         {
65             aTransform = basegfx::tools::createScaleB2DHomMatrix(1.0, -1.0);
66             aTransform.translate( 0.0, 1.0 );
67             poly.transform( aTransform );
68             poly.flip();
69         }
70         else
71         {
72             aTransform = basegfx::tools::createTranslateB2DHomMatrix(-0.5, -0.5);
73             aTransform.rotate( M_PI );
74             aTransform.translate( 0.5, 0.5 );
75             poly.transform( aTransform );
76         }
77         res.append(poly);
78     }
79 
80     return m_flipOnYAxis ? flipOnYAxis(res) : res;
81 }
82 
83 }
84 }
85