Depends on the application whether you can afford this... I would think that in some cases you would want to use rounding so that there is more accurate rendering... you want your object to snap to the nearest pixel, and nearest may be up instead of floored.
I do want to emphasize that it is not simply enough to set the DisplayObject's own coordinates to an integer; if the DO in question is inside a parent DO with non-integer coordinates, it won't be correct. That's why I was recommending the localToGlobal technique. -jonathan On Wed, Dec 17, 2008 at 11:55 AM, Jiri Heitlager < jiriheitla...@googlemail.com> wrote: > Math should be avoided when possible, I believe it is quit slow. > > Maybe > > Number >> 0 is even faster for rounding of ;) > > Jiri > > > > > laurent wrote: > >> >> int( ) is casting the content to integer, it has the effect to drop off >> the decimal part. Same as Math.floor but lots faster >> >> L >> >> Cor a écrit : >> >>> If the sprite.x is not an exact round number (so not an correct integer) >>> wouldn't that throw an error??? >>> >>> >>> -----Original Message----- >>> From: flashcoders-boun...@chattyfig.figleaf.com >>> [mailto:flashcoders-boun...@chattyfig.figleaf.com] On Behalf Of Jiri >>> Heitlager >>> Sent: woensdag 17 december 2008 15:11 >>> To: Flash Coders List >>> Subject: Re: [Flashcoders] Pixel precise >>> >>> Casting to int is faster. >>> >>> var tX:int = int(sprite.x) >>> >>> Jiri >>> >>> jonathan howe wrote: >>> >>> >>>> Hi, Laurent, >>>> >>>> You could use localToGlobal(), apply Math.round() to this global point, >>>> compare the original global point with the rounded version, and then >>>> >>>> >>> offset >>> >>> >>>> the child's coordineates by the differences. >>>> >>>> Caveats are: >>>> - if you do this multiple places in a display hierarchy, you'd need to >>>> >>>> >>> work >>> >>> >>>> from the bottom upwards. >>>> - during animation you're bound to introduce a certain amount of >>>> >>>> >>> jumpiness. >>> >>> >>>> On Wed, Dec 17, 2008 at 8:39 AM, laurent <laur...@logiquefloue.org> >>>> wrote: >>>> >>>> >>>> >>>>> Hi, >>>>> >>>>> Is there a way to be sure elements are positionned précisely on a Pixel >>>>> ? >>>>> >>>>> I have a sprite containing sprites that are positionned on integer >>>>> coordinates so they are pixel positionned. >>>>> And this sprite is re-positionned when the window resize, so I used >>>>> int() >>>>> to be sure I got x and y as integers but still the content get blury >>>>> sometimes. >>>>> Is there something to do that flash always position element on a pixel >>>>> >>>>> >>>> not >>> >>> >>>> a pixel and half...? >>>>> >>>>> thx >>>>> L >>>>> _______________________________________________ >>>>> Flashcoders mailing list >>>>> Flashcoders@chattyfig.figleaf.com >>>>> http://chattyfig.figleaf.com/mailman/listinfo/flashcoders >>>>> >>>>> >>>>> >>>> >>>> >>>> >>> _______________________________________________ >>> Flashcoders mailing list >>> Flashcoders@chattyfig.figleaf.com >>> http://chattyfig.figleaf.com/mailman/listinfo/flashcoders >>> No virus found in this incoming message. >>> Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: >>> 270.9.19/1853 - Release Date: 17-12-2008 >>> 8:31 >>> >>> >>> _______________________________________________ >>> Flashcoders mailing list >>> Flashcoders@chattyfig.figleaf.com >>> http://chattyfig.figleaf.com/mailman/listinfo/flashcoders >>> >>> >>> >>> >> >> _______________________________________________ >> Flashcoders mailing list >> Flashcoders@chattyfig.figleaf.com >> http://chattyfig.figleaf.com/mailman/listinfo/flashcoders >> >> _______________________________________________ > Flashcoders mailing list > Flashcoders@chattyfig.figleaf.com > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders > -- -jonathan howe _______________________________________________ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
