slideshow/source/engine/transitions/clockwipe.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 "clockwipe.hxx"
  39
  40
  41 namespace slideshow {
  42 namespace internal {
  43
  44 ::basegfx::B2DPolygon ClockWipe::calcCenteredClock( double t, double e )
  45 {
  46     ::basegfx::B2DPolygon poly;
  47     ::basegfx::B2DHomMatrix aTransform;
  48     aTransform.rotate( t * 2.0 * M_PI );
  49     const double MAX_EDGE = 2.0;
  50     ::basegfx::B2DPoint p( 0.0, -MAX_EDGE );
  51     p *= aTransform;
  52     poly.append( p );
  53     if (t >= 0.875)
  54         poly.append( ::basegfx::B2DPoint( -e, -e ) );
  55     if (t >= 0.625)
  56         poly.append( ::basegfx::B2DPoint( -e, e ) );
  57     if (t >= 0.375)
  58         poly.append( ::basegfx::B2DPoint( e, e ) );
  59     if (t >= 0.125)
  60         poly.append( ::basegfx::B2DPoint( e, -e ) );
  61     poly.append( ::basegfx::B2DPoint( 0.0, -e ) );
  62     poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) );
  63     poly.setClosed(true);
  64     return poly;
  65 }
  66
  67 ::basegfx::B2DPolyPolygon ClockWipe::operator () ( double t )
  68 {
  69     ::basegfx::B2DHomMatrix aTransform;
  70     aTransform.scale( 0.5, 0.5 );
  71     aTransform.translate( 0.5, 0.5 );
  72     ::basegfx::B2DPolygon poly( calcCenteredClock(t) );
  73     poly.transform( aTransform );
  74     return ::basegfx::B2DPolyPolygon(poly);
  75 }
  76
  77 }
  78 }