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27 
28 #if ! defined INCLUDED_SLIDESHOW_SNAKEWIPE_HXX
29 #define INCLUDED_SLIDESHOW_SNAKEWIPE_HXX
30 
31 #include "parametricpolypolygon.hxx"
32 
33 #include <basegfx/numeric/ftools.hxx>
34 #include <basegfx/point/b2dpoint.hxx>
35 
36 
37 namespace slideshow {
38 namespace internal {
39 
40 /// Generates a snake wipe:
41 class SnakeWipe : public ParametricPolyPolygon
42 {
43 public:
44     SnakeWipe( sal_Int32 nElements, bool diagonal, bool flipOnYAxis );
45     virtual ::basegfx::B2DPolyPolygon operator () ( double t );
46 
47 protected:
48     // topLeftHorizontal:
49     ::basegfx::B2DPolyPolygon calcSnake( double t ) const;
50     // topLeftDiagonal:
51     ::basegfx::B2DPolyPolygon calcHalfDiagonalSnake( double t, bool in ) const;
52 
53     const sal_Int32 m_sqrtElements;
54     const double m_elementEdge;
55     const bool m_diagonal;
56     const bool m_flipOnYAxis;
57 };
58 
59 /// Generates a parallel snakes wipe:
60 class ParallelSnakesWipe : public SnakeWipe
61 {
62 public:
63     ParallelSnakesWipe( sal_Int32 nElements,
64                         bool diagonal, bool flipOnYAxis, bool opposite )
65         : SnakeWipe( nElements, diagonal, flipOnYAxis ),
66           m_opposite( opposite )
67         {}
68     virtual ::basegfx::B2DPolyPolygon operator () ( double t );
69 private:
70     const bool m_opposite;
71 };
72 
73 }
74 }
75 
76 #endif /* INCLUDED_SLIDESHOW_SNAKEWIPE_HXX */
77