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WebSVN – planix.SVN – Blame – /os/branches/feature_fixcpp/sys/src/games/sokoban/animation.c – Rev 2

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