git.hungrycats.org Git - xscreensaver/blob - utils/spline.h

   1 #ifndef _SPLINE_H_
   2 #define _SPLINE_H_
   3
   4 #include <X11/Xlib.h>
   5
   6 #if __STDC__
   7 # define P(x)x
   8 #else
   9 # define P(x)()
  10 #endif
  11
  12 typedef struct _spline
  13 {
  14   /* input */
  15   u_int         n_controls;
  16   double*       control_x;
  17   double*       control_y;
  18
  19   /* output */
  20   u_int         n_points;
  21   XPoint*       points;
  22   u_int         allocated_points;
  23 } spline;
  24
  25 spline* make_spline P((u_int size));
  26 void compute_spline P((spline* s));
  27 void compute_closed_spline P((spline* s));
  28 void just_fill_spline P((spline* s));
  29 void append_spline_points P((spline* s1, spline* s2));
  30 void spline_bounding_box P((spline* s, XRectangle* rectangle_out));
  31
  32 #undef P
  33 #endif /* _SPLINE_H_ */