sprite.h

数据挖掘中de一个算法 hamster的实例

/*----------------------------------------------------------------------
  File    : sprite.h
  Contents: sprite management, single color (X11 version)
  Author  : Christian Borgelt
  History : 30.10.1997 file created
            31.10.1997 first version completed
            01.11.1997 application context added to function spr_create
            02.11.1997 separate graphics context for buffer removed
            04.11.1997 move function changed to timeout procedure
            06.11.1997 callback function added to function spr_move
            16.06.1998 fields xnew and ynew added to structure SPRITE
----------------------------------------------------------------------*/
#ifndef __SPRITE__
#define __SPRITE__
#include <limits.h>
#include <X11/Xlib.h>
#include <X11/Intrinsic.h>

/*----------------------------------------------------------------------
  Type Definitions
----------------------------------------------------------------------*/
typedef struct {                /* --- sprite --- */
  int            xext, yext;    /* x- and y-extension of sprite */
  int            xoff, yoff;    /* x- and y-offset to current image */
  int            xnew, ynew;    /* x- and y-offset to new image */
  int            xpos, ypos;    /* current position of sprite */
  short          drawn;         /* flag whether sprite is drawn */
  XtAppContext   appctx;        /* application context */
  Widget         widget;        /* widget sprite is drawn into */
  Display        *display;      /* display connected to */
  Window         window;        /* window of widget */
  Pixmap         buffer;        /* buffer for background */
  GC             gc;            /* graphics context */
  XtIntervalId   iid;           /* id of time interval procedure */
  XtCallbackProc cback;         /* callback function for spr_move */
  XtPointer      data;          /* client data for callback function */
  int            dx, dy, di;    /* increments for movement */
  int            cnt;           /* number of steps for movement */
  unsigned int   delay;         /* delay for one step (milliseconds) */
} SPRITE;                       /* (sprite) */

/*----------------------------------------------------------------------
  Functions
----------------------------------------------------------------------*/
extern SPRITE* spr_create (Widget widget, int xext, int yext,
                           Pixmap bitmap, unsigned long color);
extern void    spr_delete (SPRITE *spr);
extern void    spr_pos    (SPRITE *spr, int *x, int *y);
extern void    spr_select (SPRITE *spr, int series, int index);
extern int     spr_draw   (SPRITE *spr, int x, int y);
extern int     spr_undraw (SPRITE *spr);
extern int     spr_move   (SPRITE *spr, int dx, int dy, int di,
                           int cnt, float delay,
                           XtCallbackProc callback, XtPointer data);
extern void    spr_stop   (SPRITE *spr);
extern int     spr_busy   (SPRITE *spr);

/*----------------------------------------------------------------------
  Preprocessor Definitions
----------------------------------------------------------------------*/
#define spr_pos(s,x,y)    (*(x) = (s)->xpos, *(y) = (s)->ypos)
#define spr_busy(s)       ((s)->cnt > 0)

#endif