Hi. I am kind of tired of all of the parentheses I have to put in places
and I'm trying to figure out what is the correct way to write code such
that I can leave out parentheses. For example, I have the following:
data Message = ... --leaving this out because it's not important
data Plane =
I know about the $ symbol, that's why it's in there in the respective
places. I see that I can use it to fix my problem, but I was trying to
figure out function composition really. I guess that's just not the
place for it. I'll check out Control.Applicative. Also thanks for the
clarification
Hi everyone. I'm looking for something specific. I'm trying to figure
out how to use the depthFunc StateVar and I can't find any official
documentation for it. I did a :t depthFunc in ghci and got depthFunc
:: StateVar (Maybe ComparisonFunction) so I looked up
ComparisonFunction and couldn't
Woops, nevermind. I WAS looking in the wrong place. I should've known
=P. Sorry for the unnecessary request.
-Eitan
PS.
For anyone interested all of the documentation is in
Graphics.Rendering.OpenGL.GL.PerFragment on hackage
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Hi. I'm working in Windows on an OpenGL application. I finally got
everything working, doing all of my testing through the interpreter.
When I finally compiled and ran the program from an executable for the
first time I noticed that before creating my OpenGL window an empty DOS
prompt popped
In C++, maybe Java, I remember using a Robot to change the location of
the mouse on the screen. My intention is to do something like in an FPS
game where the mouse is always centered to make sure it doesn't run into
the edges of the screen. How can I do that in Haskell? I'm using OpenGL,
so if
Thanks. That is exactly what I was looking for. I really appreciate the
help.
-Eitan
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I'm trying to install SDL through Cabal -- I don't know another way to
install it. However, I'm getting this:
setup.exe: The package has a './configure' script. This requires a Unix
compatibility toolchain such as MinGW+MSYS or Cygwin.
cabal: Error: some packages failed to install:
SDL-0.5.10
HGL actually looks like EXACTLY what I need. I only need to set pixels,
which looks like just what HGL would be good at. Only problem is that I
can't find a single tutorial for HGL. Does anyone know or any, or where
I could find one?
-Eitan
On 7/30/2010 12:22 PM, Henning Thielemann wrote:
I'm having an unusual problem with OpenGL. To be honest I probably
shouldn't be using OpenGL for this, as I'm just doing 2D and only
drawing Points, but I don't know about any other display packages, so
I'm making due. If this is a problem because of OpenGL however, then
I'll have to learn
Hi everyone. I was wondering if someone could just guide me toward some
good information, but if anyone wants to help with a personal
explanation I welcome it. I'm trying to write a threaded program and I'm
not sure how to manage my memory. I read up on MVars and they make a lot
of sense. My
this approach is pretty
much like not having to worry about garbage collection. Even using STM
you still have to do a lot of your own manual forkIO, putVar, kill etc.
Best regards
Günther
Am 29.07.10 02:23, schrieb Eitan Goldshtrom:
Hi everyone. I was wondering if someone could just guide me
Ah! That clears that up a lot. I read the wiki page but something just
didn't make full sense about it until you used the word prevent. I
understand that the computer doesn't actually prevent other threads from
running -- that would defeat the purpose of the concurrency -- but it
helped clear
I'm trying to fit a where clause to some guards I'm using. I have the
following
f a b
| c 1 = ...
| c 1 = ...
| otherwise = ...
where c = a+b
yet I'm getting a parsing error. Is this not the correct way to combine
where with guards?
-Eitan
Well, perhaps you can help me figure out the problem with my exact program.
Just in case it matters, the program draws a Mandelbox via volumetric
ray casting. I can provide more information about the function, but I
wouldn't think it's necessary, since my problem is with parsing. The
error I'm
Aha. I understand now. A single where-clause applies to the entire scope
of the function, at all levels. Thanks for the help.
-Eitan
On 7/21/2010 3:55 AM, Nicolas Wu wrote:
Ugh, my formatting got eaten up by gmail. I just removed the where in
front of m =, and aligned tat statment with your
One point of clarification that'd be nice. I'm getting some type errors
that I wasn't getting before, so I'd just like to know something about
the inline pragma. I have
width = 800
{-# INLINE width #-}
main = (truncate width, fromIntegral width)
Now when I ran this program it seemed to work
Correction to my last e-mail. I figured out why it worked at first and
then failed, so I'll refine my question. I'd like the compiler to simply
put the number 800 everywhere that I put the name width in my code.
Instead it's putting (800 :: Float), or Double or Int, whatever I want,
but it's
Awesome. It worked. Haskell continues to impress me. Thanks for the help
everyone.
-Eitan
On 7/19/2010 4:42 AM, Max Bolingbroke wrote:
Use NoMonomorphismRestriction or give an explicit type signature:
width :: Num a = a
width = 800
Max
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Silly question, but I can't find the answer on the net. I think I'm just
using the wrong words in my search. I'm looking for a way to create
constant expressions in Haskell. The C/C++ equivalent of what I'm
talking about is
#define NAME VALUE
I want an expression, or really just numbers for
So just so I get this straight, the following are equivalent to the
computer, after compiling:
1.
fact = 10
{-# INLINE fact #-}
func x = x * fact
2.
func x = x * 10
I'm also curious as to what the {-# #-} brackets represent. I've never
seen those before.
-Eitan
On Wed, May 19, 2010 at 10:06 PM, Eitan Goldshtrom
thesource...@gmail.com wrote:
Hi everyone,
I would like to start working on a program that requires access to a camera
attached to the computer probably via USB or otherwise internally.
Unfortunately I don't know anything about using devices
Hi everyone,
I would like to start working on a program that requires access to a
camera attached to the computer probably via USB or otherwise
internally. Unfortunately I don't know anything about using devices in
haskell. I tried looking up how to access the microphone one too and had
Hello fellow Haskell programmers,
I seem to be having problems with some threads of mine. I wrote an
OpenGL program that employs some threads (forkIO) in order to separate
any calculations from the OpenGL code. At first it all seemed to be
working just fine. Then I added some code for
Hi,
I'm trying to make a program to make it easy to rename files in bulk.
What I'm wondering is how to get a list of all files in a particular
directory. I found System.Posix.Files and I'm planning on using the
rename function in it for actually renaming, but I can't find an easy
way to get
convenient functionality for finding all files which match a particular pattern.
Cheers,
Greg
On Dec 19, 2009, at 6:40 PM, Eitan Goldshtrom wrote:
Hi,
I'm trying to make a program to make it easy to rename files in bulk. What I'm
wondering is how to get a list of all files in a particular
Hello. I'm new to this mailing list, so I apologize if this question is
inappropriate for this list, but I've been looking for a solution to
this problem for weeks and I've had no luck.
I am trying to write a program with HOpenGL and freeglut, but I can't
seem to get it to render. I'm running
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