ref: 4983adfa2cd403eda22d862917c2ff5ed35b48b3
dir: /sys/src/games/sokoban/animation.c/
#include <u.h> #include <libc.h> #include <draw.h> #include "sokoban.h" void initanimation(Animation *a) { if (a == nil) return; memset(a, 0, sizeof(Animation)); } void setupanimation(Animation *a, Route *r) { if (a == nil || r == nil || r->step == nil) return; a->route = r; a->step = r->step; if (a->step < a->route->step + a->route->nstep) a->count = a->step->count; else stopanimation(a); } int onestep(Animation *a) { if (a == nil) return 0; if (a->count > 0 && a->step != nil && a->route != nil) { move(a->step->dir); a->count--; if (a->count == 0) { a->step++; if (a->step < a->route->step + a->route->nstep) a->count = a->step->count; else stopanimation(a); } } else if (a->count > 0 && (a->step == nil || a->route == nil)) stopanimation(a); return (a->count > 0); } void stopanimation(Animation *a) { if (a == nil) return; if (a->route != nil) freeroute(a->route); memset(a, 0, sizeof(Animation)); }