Send Beginners mailing list submissions to
beginners@haskell.org
To subscribe or unsubscribe via the World Wide Web, visit
http://www.haskell.org/mailman/listinfo/beginners
or, via email, send a message with subject or body 'help' to
beginners-requ...@haskell.org
You can reach the person managing the list at
beginners-ow...@haskell.org
When replying, please edit your Subject line so it is more specific
than "Re: Contents of Beginners digest..."
Today's Topics:
1. Re: How to model this in haskell, get rid of my OO thinking?
(Nathan Huesken)
2. HOpenGL questions (Nathan Huesken)
3. Re: Haskell described as a "rigid" language (a...@spamcop.net)
4. Re: HOpenGL questions (Thomas Davie)
5. Re: HOpenGL questions (Thomas Davie)
6. Re: How to model this in haskell, get rid of my OO thinking?
(Henk-Jan van Tuyl)
7. WxHaskell problems was Re: [Haskell-beginners] How to model
this in haskell, get rid of my OO thinking? (James Fenn)
8. Re: WxHaskell problems was Re: [Haskell-beginners] How to
model this in haskell, get rid of my OO thinking? (Nathan Huesken)
9. Re: WxHaskell problems was Re: [Haskell-beginners] How to
model this in haskell, get rid of my OO thinking? (Daniel Fischer)
----------------------------------------------------------------------
Message: 1
Date: Tue, 18 May 2010 19:08:15 -0400
From: Nathan Huesken <hask...@lonely-star.org>
Subject: Re: [Haskell-beginners] How to model this in haskell, get rid
of my OO thinking?
To: beginners@haskell.org
Message-ID: <20100518190815.3922c...@samzwo>
Content-Type: text/plain; charset=US-ASCII
Hey,
I think I am getting grasp of it.
Thanks for all the help!
------------------------------
Message: 2
Date: Tue, 18 May 2010 19:10:27 -0400
From: Nathan Huesken <hask...@lonely-star.org>
Subject: [Haskell-beginners] HOpenGL questions
To: Biginners Haskell Mailinglist <beginners@haskell.org>
Message-ID: <20100518191027.09539...@samzwo>
Content-Type: text/plain; charset=US-ASCII
Hi,
I send this mail to the HOpenGL mailinglist. I did not get a reply. I
hope it is OK to ask this question here.
I am new to Haskell, but not new to OpenGL. I am reading the tutorials
on the HOpenGL page and have a few questions.
- First of all, all tutorials are using GLUT. Is that really the way to
go with HOpenGL? They define (among other things) a onIdle and a
onDraw function. That seems to me (at least for a game) not the way
to go. onIdle updates the game logic, and onDraw draws the screen. As
far as I can see, it does not make sense to update the game logic
more than once between consecutive calls to onDraw. Same thing is
true for class to onDraw between consecutive class to onIdle. Is this
accounted for in the approach?
- In addition there is the onInput function. The onInput, onIdle and
onDraw functions communicate (in the tutorials) using variables
declared with newIORef. I come from the OO language C++ and almost no
experience with functional languages. But this puzzles me. Basically
they define global variables for the exchange between the callback
functions, correct?!? So, for every piece of information I want to
pass between these functions, I have to declare a newIORef variable?
In C/C++ I find GLUT not a very good approach and prefer plain OpenGL.
Does it make sense to go with plain OpenGL in Haskell too? Are there
any resources on how to do that?
Thanks!
Nathan
------------------------------
Message: 3
Date: Wed, 19 May 2010 02:27:30 -0400
From: a...@spamcop.net
Subject: Re: [Haskell-beginners] Haskell described as a "rigid"
language
To: beginners@haskell.org
Message-ID: <20100519022730.2mwl762p4owg004c-...@webmail.spamcop.net>
Content-Type: text/plain; charset=ISO-8859-1; DelSp="Yes";
format="flowed"
G'day all.
The trouble with calling a programming language "rigid" is that it
could either mean that you need to re-think some assumptions about how
you program compared to the languages you know, or it could mean that
it's a Turing tarpit.
Sometimes, even experts find it hard to tell the difference until
they've used the language for a while.
Andrew Bromage
------------------------------
Message: 4
Date: Wed, 19 May 2010 07:43:38 +0100
From: Thomas Davie <tom.da...@gmail.com>
Subject: Re: [Haskell-beginners] HOpenGL questions
To: Nathan Huesken <hask...@lonely-star.org>
Cc: Biginners Haskell Mailinglist <beginners@haskell.org>
Message-ID: <e8a67643-f981-4d43-92e8-019fa17e0...@gmail.com>
Content-Type: text/plain; charset=windows-1252
> - First of all, all tutorials are using GLUT. Is that really the way to
> go with HOpenGL?
Probably not, but this is pretty typical of OpenGL tutorials they use GLUT
because it's simple to get going, and avoids having to demonstrate lots of
things that are irrelevant to OpenGL.
> They define (among other things) a onIdle and a
> onDraw function. That seems to me (at least for a game) not the way
> to go. onIdle updates the game logic, and onDraw draws the screen. As
> far as I can see, it does not make sense to update the game logic
> more than once between consecutive calls to onDraw. Same thing is
> true for class to onDraw between consecutive class to onIdle. Is this
> accounted for in the approach?
Actually, at least the onIdle running many times between onDraw is completely
reasonable for a game... To keep your physics simulation accurate, you want
nice, short, time steps, you don't necessarily want to be rendering each and
every one of them though.
> - In addition there is the onInput function. The onInput, onIdle and
> onDraw functions communicate (in the tutorials) using variables
> declared with newIORef. I come from the OO language C++ and almost no
> experience with functional languages. But this puzzles me. Basically
> they define global variables for the exchange between the callback
> functions, correct?!? So, for every piece of information I want to
> pass between these functions, I have to declare a newIORef variable?
Yeh, that's horribly horribly ugly. I would personally be spawning two
threads, one to repeatedly update the game's state, and one to render. The
functions for each thread would accept a channel as input. The game state
updater would push game states into the channel, the renderer would pull all of
them out and render the last one it finds.
> In C/C++ I find GLUT not a very good approach and prefer plain OpenGL.
> Does it make sense to go with plain OpenGL in Haskell too? Are there
> any resources on how to do that?
I don't get how you use "plain OpenGL". There are no calls in OpenGL to set up
graphics contexts, or accept user input etc.
Personally, I would be using your own system's functions for doing this though
i.e. on Mac OS I would be using Cocoa to do it; on Linux GTK/Qt; on Windows
.Net; etc.
Bob
------------------------------
Message: 5
Date: Wed, 19 May 2010 07:47:04 +0100
From: Thomas Davie <tom.da...@gmail.com>
Subject: Re: [Haskell-beginners] HOpenGL questions
To: Nathan Huesken <hask...@lonely-star.org>
Cc: Biginners Haskell Mailinglist <beginners@haskell.org>
Message-ID: <12eaff62-19d3-4ad3-9fbe-da3786414...@gmail.com>
Content-Type: text/plain; charset=us-ascii
p.s.
My answer to how I would structure a program using OpenGL was rather a
pragmatic version, as I expect you were wanting. My actual answer to how I'd
*like* to see this work, is actually to have a much more functional design...
Such a design would use FRP to compute the game world state, and main in my
program would have roughly the type Behaviour PlayerInput -> Behaviour
SceneGraph.
------------------------------
Message: 6
Date: Wed, 19 May 2010 10:02:06 +0200
From: "Henk-Jan van Tuyl" <hjgt...@chello.nl>
Subject: Re: [Haskell-beginners] How to model this in haskell, get rid
of my OO thinking?
To: "Beginners Haskell Mailinglist" <beginners@haskell.org>,
hask...@lonely-star.org
Message-ID: <op.vcx0lstfpz0...@zen5.router.home>
Content-Type: text/plain; charset=iso-8859-15; format=flowed;
delsp=yes
On Tue, 18 May 2010 05:21:38 +0200, <hask...@lonely-star.org> wrote:
> Hi,
>
> I learning haskell and I am trying to understand how model certain
> things in it.
> As I have been doing a lot of C++ programming so far. Let's imagine we
> want to write a game. In the game there are spaceships and rocks (image
> something like astroids :) ). Now both spaceships and rocks have a
> position and can move. Spaceships can shoot, while rocks can explode.
There is a well documented implementation, called wxAsteroids; see
http://www.haskell.org/haskellwiki/WxAsteroids
Regards,
Henk-Jan van Tuyl
--
http://Van.Tuyl.eu/
http://members.chello.nl/hjgtuyl/tourdemonad.html
--
------------------------------
Message: 7
Date: Wed, 19 May 2010 13:43:20 +0100
From: James Fenn <hask...@jamesfenn.com>
Subject: WxHaskell problems was Re: [Haskell-beginners] How to model
this in haskell, get rid of my OO thinking?
To: beginners@haskell.org
Message-ID:
<aanlktimgcde0hgpbu6yc4jvoncvryyez7kpapfpj9...@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
For me on ubuntu karmic and haskell platform 2010.1, WxWidgets doesn't
seem to be responding to keypresses. I have only tried it with
WxAsteroids as I thought it would be useful for me to study. Does
anyone else have the same problem?
Cheers,
James
On 19 May 2010 09:02, Henk-Jan van Tuyl <hjgt...@chello.nl> wrote:
>
> On Tue, 18 May 2010 05:21:38 +0200, <hask...@lonely-star.org> wrote:
>
>> Hi,
>>
>> I learning haskell and I am trying to understand how model certain
>> things in it.
>> As I have been doing a lot of C++ programming so far. Let's imagine we
>> want to write a game. In the game there are spaceships and rocks (image
>> something like astroids :) ). Now both spaceships and rocks have a
>> position and can move. Spaceships can shoot, while rocks can explode.
>
> There is a well documented implementation, called wxAsteroids; see
> http://www.haskell.org/haskellwiki/WxAsteroids
>
> Regards,
> Henk-Jan van Tuyl
>
>
> --
> http://Van.Tuyl.eu/
> http://members.chello.nl/hjgtuyl/tourdemonad.html
> --
> _______________________________________________
> Beginners mailing list
> Beginners@haskell.org
> http://www.haskell.org/mailman/listinfo/beginners
------------------------------
Message: 8
Date: Wed, 19 May 2010 08:46:46 -0400
From: Nathan Huesken <hask...@lonely-star.org>
Subject: Re: WxHaskell problems was Re: [Haskell-beginners] How to
model this in haskell, get rid of my OO thinking?
To: beginners@haskell.org
Message-ID: <20100519084646.224c7...@samzwo>
Content-Type: text/plain; charset=UTF-8
On Wed, 19 May 2010 13:43:20 +0100
James Fenn <hask...@jamesfenn.com> wrote:
> For me on ubuntu karmic and haskell platform 2010.1, WxWidgets doesn't
> seem to be responding to keypresses. I have only tried it with
> WxAsteroids as I thought it would be useful for me to study. Does
> anyone else have the same problem?
> Cheers,
> James
>
> On 19 May 2010 09:02, Henk-Jan van Tuyl <hjgt...@chello.nl> wrote:
> >
> > On Tue, 18 May 2010 05:21:38 +0200, <hask...@lonely-star.org> wrote:
Yes, same problem here. Gentoo, installed wxHaskell over cabal (because
the gentoo ebuild is outdated).
> >
> >> Hi,
> >>
> >> I learning haskell and I am trying to understand how model certain
> >> things in it.
> >> As I have been doing a lot of C++ programming so far. Let's
> >> imagine we want to write a game. In the game there are spaceships
> >> and rocks (image something like astroids :) ). Now both spaceships
> >> and rocks have a position and can move. Spaceships can shoot,
> >> while rocks can explode.
> >
> > There is a well documented implementation, called wxAsteroids; see
> > Â http://www.haskell.org/haskellwiki/WxAsteroids
> >
> > Regards,
> > Henk-Jan van Tuyl
> >
> >
> > --
> > http://Van.Tuyl.eu/
> > http://members.chello.nl/hjgtuyl/tourdemonad.html
> > --
> > _______________________________________________
> > Beginners mailing list
> > Beginners@haskell.org
> > http://www.haskell.org/mailman/listinfo/beginners
> _______________________________________________
> Beginners mailing list
> Beginners@haskell.org
> http://www.haskell.org/mailman/listinfo/beginners
>
------------------------------
Message: 9
Date: Wed, 19 May 2010 17:23:45 +0200
From: Daniel Fischer <daniel.is.fisc...@web.de>
Subject: Re: WxHaskell problems was Re: [Haskell-beginners] How to
model this in haskell, get rid of my OO thinking?
To: beginners@haskell.org
Message-ID: <201005191723.46490.daniel.is.fisc...@web.de>
Content-Type: text/plain; charset="utf-8"
On Wednesday 19 May 2010 14:46:46, Nathan Huesken wrote:
> On Wed, 19 May 2010 13:43:20 +0100
>
> James Fenn <hask...@jamesfenn.com> wrote:
> > For me on ubuntu karmic and haskell platform 2010.1, WxWidgets doesn't
> > seem to be responding to keypresses. I have only tried it with
> > WxAsteroids as I thought it would be useful for me to study. Does
> > anyone else have the same problem?
> > Cheers,
> > James
> >
> > On 19 May 2010 09:02, Henk-Jan van Tuyl <hjgt...@chello.nl> wrote:
> > > On Tue, 18 May 2010 05:21:38 +0200, <hask...@lonely-star.org> wrote:
>
> Yes, same problem here. Gentoo, installed wxHaskell over cabal (because
> the gentoo ebuild is outdated).
Yes, here too (openSUSE 11.1), though it does respond to Ctrl+[N/P/Q], but
not to any other keypress.
------------------------------
_______________________________________________
Beginners mailing list
Beginners@haskell.org
http://www.haskell.org/mailman/listinfo/beginners
End of Beginners Digest, Vol 23, Issue 30
*****************************************
