/usr/share/doc/libhugs-glut-bundled/examples/GLUT/RedBook/Cube.hs is in libhugs-glut-bundled 98.200609.21-5.4.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | {-
Cube.hs (adapted from cube.c which is (c) Silicon Graphics, Inc.)
Copyright (c) Sven Panne 2002-2005 <sven.panne@aedion.de>
This file is part of HOpenGL and distributed under a BSD-style license
See the file libraries/GLUT/LICENSE
This program demonstrates a single modeling transformation, scale and a
single viewing transformation, lookAt. A wireframe cube is rendered.
-}
import System.Exit ( exitWith, ExitCode(ExitSuccess) )
import Graphics.UI.GLUT
myInit :: IO ()
myInit = do
clearColor $= Color4 0 0 0 0
shadeModel $= Flat
display :: DisplayCallback
display = do
clear [ ColorBuffer ]
-- resolve overloading, not needed in "real" programs
let color3f = color :: Color3 GLfloat -> IO ()
scalef = scale :: GLfloat -> GLfloat -> GLfloat -> IO ()
color3f (Color3 1 1 1)
loadIdentity -- clear the matrix
-- viewing transformation
lookAt (Vertex3 0 0 5) (Vertex3 0 0 0) (Vector3 0 1 0)
scalef 1 2 1 -- modeling transformation
renderObject Wireframe (Cube 1)
flush
reshape :: ReshapeCallback
reshape size = do
viewport $= (Position 0 0, size)
matrixMode $= Projection
loadIdentity
frustum (-1) 1 (-1) 1 1.5 20
matrixMode $= Modelview 0
keyboard :: KeyboardMouseCallback
keyboard (Char '\27') Down _ _ = exitWith ExitSuccess
keyboard _ _ _ _ = return ()
main :: IO ()
main = do
(progName, _args) <- getArgsAndInitialize
initialDisplayMode $= [ SingleBuffered, RGBMode ]
initialWindowSize $= Size 500 500
initialWindowPosition $= Position 100 100
createWindow progName
myInit
displayCallback $= display
reshapeCallback $= Just reshape
keyboardMouseCallback $= Just keyboard
mainLoop
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