Received: by 10.224.186.143 with SMTP id cs15mr6407761qab.3.1346453734650; Fri, 31 Aug 2012 15:55:34 -0700 (PDT)
Received: by 10.236.170.7 with SMTP id o7mr998209yhl.3.1346453734627; Fri, 31 Aug 2012 15:55:34 -0700 (PDT)
Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!news.glorb.com!b19no147834qas.0!news-out.google.com!da15ni7637554qab.0!nntp.google.com!b19no147832qas.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
Newsgroups: comp.sys.apple2.programmer
Date: Fri, 31 Aug 2012 15:55:34 -0700 (PDT)
In-Reply-To: <4a44c788-b39b-47d0-ba07-7996128e804f@googlegroups.com>
Complaints-To: groups-abuse@google.com
Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=70.123.154.97; posting-account=HyIOQgoAAAAfAUGOevdCSBhPYcDSPtM9
NNTP-Posting-Host: 70.123.154.97
References: <1688c87e-a1e2-47c4-9969-b4465931c194@googlegroups.com> <4a44c788-b39b-47d0-ba07-7996128e804f@googlegroups.com>
User-Agent: G2/1.0
MIME-Version: 1.0
Message-ID: <d0643a4b-43f6-41fa-b9bd-81eac89fc72d@googlegroups.com>
Subject: Re: Fast-wipe Hires
From: BLuRry <brendan.robert@gmail.com>
Injection-Date: Fri, 31 Aug 2012 22:55:34 +0000
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Xref: csiph.com comp.sys.apple2.programmer:441

On Friday, August 31, 2012 2:10:07 PM UTC-5, Antoine Vignau wrote:
> Even faster ;-)
>=20
> - divide your lookup table into two tables: one for low @ and one for hig=
h @
>=20
>=20
>=20
> lookupl hex D050D050D050 ...
>=20
> lookuph hex 232322222121 ...
>=20
>=20
>=20
>  LDY #24-1
>=20
>  CLC
>=20
> clearloop
>=20
>  LDA lookuph,y
>=20
>  ...
>=20
>=20
>=20
>  LDX #40-1 (and not 40)
>=20
>  LDA lookupl,y
>=20
>  ...
>=20
>=20
>=20
> You'll save one DEY per loop and even more with #40-1 instead of #40 :-)
>=20
>=20
>=20
> antoine

That's good feedback!  Thanks Antoine!  I expanded this out to EOR page 1 a=
nd page 2 and flip on the VBL.  This proof of concept has shown me that the=
 resolution of the display does not seem so low when you're flipping pages =
rapidly to produce optical illusions.

I've been able to reproduce these two:

http://www.moillusions.com/2007/01/flying-through-city-stereogram.html
http://www.grand-illusions.com/opticalillusions/chris_walken/

And I also have a take on this one which makes it look like it's continuall=
y expanding:

http://www.moillusions.com/wp-content/uploads/img142.imageshack.us/img142/4=
364/bulge023qx.gif

All in all, the speed of the routine is key to reversing the screen quickly=
.

More to follow...

-B