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Questions tagged [gloss]

The Haskell gloss package is a simple vector graphics drawing package.

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Gloss hides the pain of drawing simple vector graphics behind a nice data type and a few display functions. Gloss uses OpenGL under the hood, but you won't need to worry about any of that. Get something cool on the screen in under 10 minutes.

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ReacTime function crashing game

My problem is that i made a game, i have initialState, drawState and reactEvent running well, but my reactTime function when i activate it crash's the programm -- | Main function that invoques the game main :: IO () main = do play dm …
Dost
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Creating a picture of a map with a recurssive function

i'm using haskell gloss for the first time and I'm having some trouble, in this code: -- the initial c and l will be imagine for dimension 9: (-160) 160 -- (so the square ends in the center of the window -- column; line; dimension …
Dost
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Cast from 'Array' (aka 'Array>') to unrelated type 'JSON' (aka 'Dictionary') always fails

I'm trying to load a table with data from JSON. I want to deserialize the JSON into an array. I use a 3rd party library called Gloss, anyway, it should be easy, but I can't solve the warning (same as the title of this thread). This is the JSON data:…
Luthfi Rahman
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Haskell Gloss: missing dependencies

As uni assignment, I need to enhance a given Haskell framework with certain features. Since this framework uses the Gloss library, I installed Gloss using cabal install gloss. This gave me no errors, however, when trying to configure the Setup file…
Felix
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iOS: Gloss Date decoding issue

I use Gloss for parsing JSON. I've got issues with parsing Date fields. My JSON input: "PurchasedAt": 2016-08-02T17:23:12.000Z, Struct: let purchasedAt: Date? init?(json: JSON) { self.purchasedAt = Decoder.decodeDate("PurchasedAt",…
NCFUSN
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Give more "information" to the simulate function (Haskell / Gloss Library)

At the beginning of the program, the user can give the simulation some "information": main:: IO() main = do putStrLn("Hallo") val <- getLine startGUI(read val ::Float) The function (startGUI) : startGUI :: Float…
Max K
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Cabal error running with Gloss

I'm trying to install gloss on my computer to make a graphic game and I followed a tutorial, with these steps: 1) First I run this command: cabal install gloss==1.8.* . I want gloss 1.8.* because I found a game made with this version of gloss, and…
Caroso
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How do I get cabal gloss working on IOS el Capitan?

After I installed cabal and try to run my (very basic) haskell code in which include import Graphics.Gloss I get an error message Could not find module ‘Graphics.Gloss’. Can´t figure out why as I seem to have installed it the correct way... Can…
Abbe Hjelm
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Persisting drawn frames in Gloss

I've been messing around with Gloss for a little bit, getting a feel for it, and I really like it! I'm having one problem though, and that is that I'm not sure how to persist drawings for more than one frame. I can draw one Picture at a time, but…
Benjamin Kovach
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How can I import an image in haskell?

I'm a beginner in haskell and trying to make a game. Currently learning Gloss graphics. I wonder how I can import an BMP (JPG or PNG) image in haskell? (As a character or background etc). I want the image to be shown in the graphics window IO ().…
blobfish
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Haskell : Gloss error when trying to render a text

I am trying to run this example: https://raw.githubusercontent.com/elisehuard/game-in-haskell/master/src/Shapes.hs But I get the error "freeglut ERROR: Function called without first calling 'glutInit'." I managed to isolate the problem to line…
finuux
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How can I draw two shapes in a time sequence using Gloss?

I have a simple window displaying two shapes like so: import Graphics.Gloss circles = pictures [Translate 80 0 one, Translate (-80) 0 two] main = display (InWindow "t" (400,400) (800,0)) white circles one = Color red $ Circle 80 two = Color blue…
user5846939
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