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/*
* structures
*/
//C++´úÂëÇó×¢ÊÍ,ºìÉ«²¿·Ö
/*
* DBLNODE - a node in a generic doubly-linked list
*/
typedef struct _DBLNODE
{
struct _DBLNODE FAR *next; // link to next node
struct _DBLNODE FAR *prev; // link to previous node
SHORT type; // type of object
double posx, posy; // actual x and y position
double velx, vely; // x and y velocity (pixels/millisecond)
double frame; // current frame
double delay; // frame/millisecond
RECT src, dst; // source and destination rects
LPDIRECTDRAWSURFACE surf; // surface containing bitmap
} DBLNODE;
typedef DBLNODE FAR *LPDBLNODE;
DBLNODE DL; // Display List
//ÏÂÃæµÄ´úÂëÎÒ²»ÊǺÜÀí½â£¬ÖصãÊÇnew²»Àí½â¡£Çë¸ßÈËÖ¸½Ì¡£
void linkObject( LPDBLNODE new )
{
new->next = DL.next;
new->prev = &DL;
DL.next->prev = new;
DL.next = new;
}
void linkLastObject( LPDBLNODE new )
{
new->prev = DL.prev;
new->next = &DL;
DL.prev->next = new;
DL.prev = new;
}
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