[Haskell-cafe] Re: [HOpenGL] renderString problems
scs4cajf at comp.leeds.ac.uk
Thu Aug 2 06:44:19 EDT 2007
On Wed, 1 Aug 2007, Dave Tapley wrote:
> Hi all,
> I'm having a lot of trouble using renderString from Graphics.UI.GLUT.Fonts.
> All my attempts to render a StrokeFont have so far failed.
> Using a BitmapFont I can get strings to appear but they demonstrate
> the odd behaviour of translating themselves a distance equal to their
> length every time my displayCallback function is evaluated.
> My requests are:
> * Does anyone know how to keep the position fixed?
> * Are there any good examples of (working) GLUT code available on
> the web, I'm finding it very hard to make any progress at the moment.
> Certainly not at Haskell speed :(
> I am using the following code:
>> import Graphics.UI.GLUT
>> main = do
>> createWindow ""
>> displayCallback $= update
>> actionOnWindowClose $= ContinueExectuion
>> update = do
>> clear [ColorBuffer]
>> renderString Fixed8By13 $ "Test string"
> HOpenGL mailing list
> HOpenGL at haskell.org
I had a similar problem with stroke fonts. Try scaling by a low number
(such as 0.01) and see where that gets you. The problem was it was
rendering them at a size much bigger than my coordinate space that I just
couldn't see them. I'm not convinced you need that $ there either but I
don't suppose it hurts.
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