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Questions tagged [gloss]

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

Source

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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How to switch the picture in the update function of the package Graphics.Gloss.Interface.IO.Simulate?

Hello i am using Haskell gloss, to create a picture of a binary tree and simulate the insertion of the values. I was able to create a draw function to create the picture of the tree and it works fine. The problem is on creating a simulation. I have…
Edmilson Almeida
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How to draw a chess board in gloss haskell?

I am just started haskell gloss. I learnt a little about it functions. I am trying to draw a chess board in haskell. The main problem is that everything is being drawn in the center. If I used the function translate the board is being draw at random…
Maheer Ali
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Dificoulties installing gloss and other packages with cabal

I am trying to install gloss but, I dont know why ghci doesn't find the modules. When I do cabal install gloss it says: Up to date Warning: You asked to install executables, but there are no executables in target: gloss. Perhaps you want to use…
Pablo
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Couldn't match type ‘IO’ with ‘[]’

I wrote a function to generate two random numbers, which I then pass to a different function to use them there. The code for this is: randomIntInRange :: (Int, Int, Int, Int) -> Board randomIntInRange (min,max,min2,max2) = do r <- randomRIO (min,…
Thijs van der Heijden
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Is there a way to merge two sets of pictures into one?

I am trying to display a grid of lines with a set of cells that fill the squares in said lines. I have already tried concatenating them like simple lists. This is the grid of lines. It is displayed correctly on its own. grid = translate…
grimbar
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Haskell Gloss and STM concurrency integration

I want to update a Haskell Gloss GUI from multiple threads (4 threads). I am looking at an application where an event on the Haskell Gloss GUI triggers a series of steps that end up creating threads each of which can and should change the GUI if…
Gakuo
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IO (Maybe Picture) -> Picture

I'm creating a game with Gloss. I have this function : block :: IO (Maybe Picture) block = loadJuicyPNG "block.png" How do I take this IO (Maybe Picture) and turn it into a Picture?
Bruno Pinto
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haskell random instance of own datatype

I am working on an Asteroid game made in Haskell with Graphics.gloss. Now I have defined a datatype for the asteroids like this: data Asteroid = Asteroid { asteroidPos:: Point, asteroidVel :: Vector, …
Steven Wijnen
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Gloss function `animate` doesnt seem to be doing anything

I am tying to create a simple animation using haskell gloss. I want that at the first 4 seconds, every rectangle will change its color to a darker one. The problem is that after a relatively long time of linking, nothing really happens - All…
Alex Goft
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'Decodable' is ambiguous for type lookup in this context

I am using Gloss for JSON decoding with Xcode9 beta 1 Swift 4. I am facing following issue: Xcode 9 beta screenshot It was working like charm in Xcode8.3.3 with Swift 3 but since I have upgraded to latest Xcode9, it has stopped working. I am…
Khawaja Farooq
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Draw squares for a game board in haskell

I would like to be able to draw something like a chess board using haskell and gloss. In any other language I could do something like for( i=0; i < 10; i++){ for( j=0; j < 10; j++){ drawSquare(radius, i, j) } } and that would be it,…
lesolorzanov
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Haskell gloss loading .bmp

-- | Main function main :: IO () main = do wall <- loadBMP "wall.bmp" -- loads wall image play initialState drawState reactEvent reactTime -- | Function that creates the game play :: State -> (State -> Picture) -> (Event ->…
Dost
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Haskell Gloss: random starfield not random?

Using Haskell’s Gloss library, I’m trying to simulate a starfield. The visual aspect (drawing ‘stars’ with various speeds and sizes to the screen) is working. However, for some reason the stars aren’t being randomly distributed, resulting in a…
Felix
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Haskell Gloss: time variable stays constant

I'm trying to rotate a Picture in Haskell, using the current time as a value for a rotate function. I've got the following main function: main :: IO () main = do args <- getArgs time <- round <$> getPOSIXTime let initial' =…
Felix
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Haskell: Failed to load interface for 'Graphics.Gloss'

Haskell Community. I am a newbie in Haskell, can only implement simple Haskell functions. I tried out one Haskell game program that was open source. While running it, GHC gave the following errors: HexDame.hs:1:1: error: Failed to load…
Arghya Dutta
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