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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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Haskell Either in main

I am having trouble to use my function that returns an Either monad in my main :: IO() function. I am able to run my code without using Either, but I now use Either to handle errors. I have the following code: parse :: Parser a -> String -> Either…
fangio
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using gloss error unknown GLUT entry glutInit

Hey I am trying to use gloss library but I always get this error: Exception: user error (unknown GLUT entry glutInit) This is my code: module Pruebas where import Graphics.Gloss window :: Display window = InWindow "Nice Window" (200, 200) (10,…
Pablo
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Making a Map in Gloss

In PL class we were asked to make a pacman clone in Gloss, nevertheless I got stuck at making the map. My approach was taking a .png of the classical pacman first level, and paste it in the render function so I don't need to draw everything by…
Daniel Andres Pinto Alvarado
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How do I load a GIF-image from computer in Haskell?

I want to have a GIF-image looping in the background of a game (For example with Gloss Juicy or module Codec.Picture.Gif) Managed to work with a BMP image like this: image :: IO Picture image = loadBMP "image.bmp" But now I want to do the same…
blobfish
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Posting a message while running Gloss code in Haskell

The Haskell playIO has the below type: playIO:: Display -> Color background color -> Int -> world --initial world -> (world -> IO Picture) -- function to change world into a picture -> (Event -> world -> IO world) --event handler…
Gakuo
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Pick a specific picture from a list

I have the following function: blockToPicture :: Int -> [Picture] -> Picture blockToPicture n [pic1,pic2,pic3] | n==0 = ... | n==1 = ... | otherwise = ... If n==0 I want to select…
Bruno Pinto
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How to Exit a Game in playIO function?

I am making Pacman in Haskell Gloss. Now I am trying to Exit the game, once all the chips on the gameboard have been eaten by pacman. I have the function to check if that is the case, but I can't find a way to exit the game after that. This is…
ramon abacherli
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Pythagoras Tree failling on level 2 and more, why?

So we are trying to build a Pythagoras Tree using gloss, and it fails level 2 and next ones (only works level 0 and 1). Here is the code: data FTree a b = Unit b | Comp a (FTree a b) (FTree a b) deriving (Eq,Show) type PTree = FTree Square…
Jaime
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Alamofire + Gloss: nested JSON array not working

I'm trying to post following JSON to the api. Following is the log from the Xcode console. { address = ( { city = 1; area = 1; "building_name" = "building"; } ); category = 1; …
Pei
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How to integrate realm model with the gloss model in effective harmony as I am facing this issue

Here is my sample code, It gives an nil on the link as self.init() called get property what is the alternate way to do this? class channel : Object, Gloss.Decodable { var id:String? var channelName:String? dynamic var links: Links? = nil public…
Purushottam Padhya
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Haskell Gloss : Making zoom, pan, and all that kind of effects for module Graphics.Gloss.Interface.Pure.Game

Recently I have been working on making a game with Haskell, and we have been using the library Gloss in order to complete the graphic part. To make a game with Gloss, as you probably know, you have to use Graphics.Gloss.Interface.Pure.Game (or IO…
pCosta99
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Combining `animation` and `play` functions in gloss

I am implementing a simple Simon game using Haskell with Gloss. I wish, at the moment, that, for example, for the first 4 seconds some rectangles will change their color (or simply in other words show some animation), and afterwards allow colors…
Alex Goft
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ghc sudden error: -lGLU, -lGL

I am running Ubuntu 16.04 in virtualbox on windows 10. I am working with gloss in haskell ghc and I compiled many files with the gloss package without an issue. Then suddenly for no apparent reason, I am getting errors compiling things that used to…
domoremath
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Haskell gloss example/skeleton

I am trying to use the gloss package in Haskell to make a game but find everything I read too simplistic or hard to read. I have seen What would be a typical game skeleton in Haskell which is a little useful but I am hoping for a little more…
domoremath
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How do I generate test cases for pictures using the RGBA constructor in the Gloss library?

I am trying to write some test cases using HUnit in Haskell for a function using the Gloss Graphics library. The function: makePicture :: Color -> Picture makePicture c = Color c $ Circle 80 If I display a call to this function with argument…
user5846939
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