sd/source/ui/slidesorter/inc/controller/SlsAnimationFunction.hxx

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  19
  20 #ifndef INCLUDED_SD_SOURCE_UI_SLIDESORTER_INC_CONTROLLER_SLSANIMATIONFUNCTION_HXX
  21 #define INCLUDED_SD_SOURCE_UI_SLIDESORTER_INC_CONTROLLER_SLSANIMATIONFUNCTION_HXX
  22
  23 #include <basegfx/point/b2dpoint.hxx>
  24
  25 #include <functional>
  26 #include <vector>
  27
  28
  29 namespace sd { namespace slidesorter { namespace controller {
  30
  31 class AnimationBezierFunction
  32 {
  33 public:
  34     /** Create a cubic bezier curve whose start and end points are given
  35         implicitly as P0=(0,0) and P3=(1,1).  The second control point is
  36         implicitly given as P2=(1-nY1,1-nX1).
  37     */
  38     AnimationBezierFunction (
  39         const double nX1,
  40         const double nY1);
  41
  42     ::basegfx::B2DPoint operator() (const double nT);
  43
  44 private:
  45     const double mnX1;
  46     const double mnY1;
  47     const double mnX2;
  48     const double mnY2;
  49
  50     static double EvaluateComponent (
  51         const double nT,
  52         const double nV1,
  53         const double nV2);
  54 };
  55
  56 /** Turn a parametric function into one whose y-Values depend on its
  57     x-Values.  Note a lot of interpolation takes place.  The resulting
  58     accuracy should be good enough for the purpose of acceleration
  59     function for animations.
  60 */
  61 class AnimationParametricFunction
  62 {
  63 public:
  64     typedef ::std::function<basegfx::B2DPoint (double)> ParametricFunction;
  65     AnimationParametricFunction (const ParametricFunction& rFunction);
  66
  67     double operator() (const double nX);
  68
  69 private:
  70     /** y-Values of the parametric function given to the constructor
  71         evaluated (and interpolated) for evenly spaced x-Values.
  72     */
  73     ::std::vector<double> maY;
  74 };
  75
  76 } } } // end of namespace ::sd::slidesorter::controller
  77
  78 #endif
  79
  80 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */