Movieclip doesn't move correctly with Actionscript

Question

I noticed that a movieclip made from a graphic and moved by Actionscript wasn't ending up in the right place. I found that incrementing the position, with mc.x = mc.x += 0.15 sometimes increments the position correctly, but at other times the position only gets incremented by 0.10. With an increment of 0.15, there's a reproducible pattern of fail-correct-fail-correct-fail..., but it increments the position correctly every time for an increment of 0.35. With yet other values of the increment I see patterns like consistently failing every fourth time around a loop but incrementing correctly the other three.

And even with an increment of 0.15, it seems to suddenly start incrementing correctly every time after the first few hundred times through a loop,

There's no problem correctly moving a movieclip I create within Actionscript. It seems to be an issue with movieclips created from imported graphics.

Has anyone else run into this? THX.

kglad · Answer

try somewhat less screwy looking code. i'm not sure that will fix the problem, but:

mc.x+=0.15 is shorthand for:

mc.x = mc.x+0.15

now, i can't see any error in using:

mc.x=mc.x=mc.x+.015;

which is what you're using, but it's certainly superfluous and my be triggering a rare issue. (rare because no one else is using mc.x = mc.x = whatever)

so change:

mc.x = mc.x += 0.15;

to

mc.x += 0.15;

and see if that resolves the problem.

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