hgl-example (empty) → 0.0.1
raw patch · 5 files changed
+1146/−0 lines, 5 filesdep +HGLdep +HTamdep +arraysetup-changed
Dependencies added: HGL, HTam, array, base, random
Files
- LICENSE +674/−0
- Setup.lhs +3/−0
- hgl-example.cabal +39/−0
- src/GraphicDemo.hs +387/−0
- src/Main.hs +43/−0
+ LICENSE view
@@ -0,0 +1,674 @@+ GNU GENERAL PUBLIC LICENSE+ Version 3, 29 June 2007++ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>+ Everyone is permitted to copy and distribute verbatim copies+ of this license document, but changing it is not allowed.++ Preamble++ The GNU General Public License is a free, copyleft license for+software and other kinds of works.++ The licenses for most software and other practical works are designed+to take away your freedom to share and change the works. By contrast,+the GNU General Public License is intended to guarantee your freedom to+share and change all versions of a program--to make sure it remains free+software for all its users. We, the Free Software Foundation, use the+GNU General Public License for most of our software; it applies also to+any other work released this way by its authors. You can apply it to+your programs, too.++ When we speak of free software, we are referring to freedom, not+price. 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+ Setup.lhs view
@@ -0,0 +1,3 @@+#! /usr/bin/env runhaskell+> import Distribution.Simple+> main = defaultMain
+ hgl-example.cabal view
@@ -0,0 +1,39 @@+Name: hgl-example+Version: 0.0.1+License: GPL+License-File: LICENSE+Author: Henning Thielemann <haskell@henning-thielemann.de>+Maintainer: Henning Thielemann <haskell@henning-thielemann.de>+Homepage: http://code.haskell.org/~thielema/hgl-example/+Category: Graphics+Synopsis: Various animations generated using HGL+Description:+ Various animations generated using HGL:+ .+ * Locomotive with asymmetrically mounted wheels+ .+ * Rotating stars+ .+ * Rotating spiral+ .+ * Rotating Lissajous curve+ .+ * Probabilistic Sierpinski triangle+Stability: Experimental+Tested-With: GHC==6.8.2+Cabal-Version: >=1.2+Build-Type: Simple++Executable hgl-example+ Build-Depends:+ HTam >=0.0.2 && <0.1,+ HGL >=3.2 && <3.3,+ random >=1.0 && <1.1,+ array >=0.1 && <0.3,+ base >= 3++ GHC-Options: -Wall+ Hs-Source-Dirs: src+ Main-Is: Main.hs+ Other-Modules:+ GraphicDemo
+ src/GraphicDemo.hs view
@@ -0,0 +1,387 @@++module GraphicDemo where++{-+ hugs GraphicDemo+-}++{-+ hugs++ :load Graphics.HGL.Utils++ :browse Graphics.HGL.Utils+-}++import Graphics.HGL.Units (Time, Point, Size, )+import Graphics.HGL.Draw.Monad (Graphic, )+import Graphics.HGL.Utils+import Graphics.HGL.Draw.Pen+import Graphics.HGL.Draw.Text+import Graphics.HGL.Draw.Picture+import Graphics.HGL.Window+import Graphics.HGL.Run++import System.Random (RandomGen, randomRs, mkStdGen, )+import Data.Array (listArray, bounds, (!), )++import Control.Exception (bracket, )++import qualified Numerics.ZeroFinder.Newton as Newton++import Prelude hiding ((^), )+import qualified Prelude as P+++-- see HTam.Useful+(^) :: Num a => a -> Int -> a+(^) = (P.^)+++aufTasteWarten :: IO ()+aufTasteWarten =+ runWindow "graphic demo" (400,300) getKey++test :: Graphic -> IO ()+test graphic =+ runWindow "graphic demo" (500,500) (\w -> setGraphic w graphic >> getKey w)++testText :: IO ()+testText =+ test (text (10,10) "test")++runWindowEx ::+ Title ->+ Maybe Point ->+ Size ->+ RedrawMode ->+ Maybe Time ->+ (Window -> IO ()) ->+ IO ()+runWindowEx title position size drawMode timerUnit act =+ runGraphics $+ bracket+ (openWindowEx title position size drawMode timerUnit)+ closeWindow+ act++testAnim :: Time -> [Graphic] -> IO ()+testAnim dur frames =+ runWindowEx "graphic demo" Nothing (500,500) DoubleBuffered (Just dur) $+ \w ->+ -- w <- openWindow "graphic demo" (500,500)+ -- setGraphic w (text (10,10) "test")+ mapM_ (\frame -> setGraphic w frame >> getWindowTick w) frames+ -- getKey w++textAnim :: IO ()+textAnim =+ testAnim 20 (map (\pos -> text (pos,2*pos) "test") [0..])++dreieck :: IO ()+dreieck =+ test (polyline [(0,0),(100,100),(200,0)])++siebzehneck :: IO ()+siebzehneck =+ test (polygon (map (\i ->+ let angle = (fromInteger i /17*2*pi)::Double+ in (250+round(200*cos angle),250+round(200*sin angle))) [0..16]))++spirale :: IO ()+spirale =+ test (polyline (map (\i ->+ let angle = (fromInteger i / 200 * 2*pi)::Double+ in (250+round(10*angle*cos angle),250+round(10*angle*sin angle))) [0..1000]))++spiralenpunkte :: Double -> [(Int,Int)]+spiralenpunkte anfang =+ map (\i ->+ let angle = (fromInteger i / 20 * 2*pi)::Double+ in (250+round(10*angle*cos (anfang+angle)),+ 250+round(10*angle*sin (anfang+angle)))) [0..100]++spiralenpunkteGleichmaessig :: Double -> [(Int,Int)]+spiralenpunkteGleichmaessig anfang =+ let angleList = take 100 $+ iterate (\angle -> angle + 9 * recip (25 + angle)) 0+ in map (\angle ->+ (250+round(10*angle*cos(anfang+angle)),+ 250+round(10*angle*sin(anfang+angle)))) angleList++doppelSpirale :: IO ()+doppelSpirale =+ test (overGraphics+ [polyline (spiralenpunkte 0),+ polyline (spiralenpunkte (4*pi/3)),+ polyline (spiralenpunkte (2*pi/3))])++spiraleAnim :: IO ()+spiraleAnim =+ testAnim 20+ (map (\phase -> polyline (spiralenpunkteGleichmaessig phase))+ [0,(-0.1)..])++lissajous :: IO ()+lissajous =+ test (polyline (map (\i ->+ let angle = (fromInteger i / 200 * 2*pi)::Double+ in (250+round(200*sin (2*angle)),+ 250+round(200*sin angle))) [0..200]))++{- Warten mit Standard-UNIX-Funktionen geht irgendwie nicht.+lissajousAnim =+ withWindow "graphic demo" (500,500) (\w -> mapM_ (\phase -> runGraphics (setGraphic w (polyline (map(\i -> let angle = (fromInteger i / 50 * 2*pi)::Double in (250+round(200*sin (angle)),250+round(200*sin (2*angle+phase)))) [0..50])) >> usleep 20000)) [0,0.1..])+-}++lissajousAnim :: IO ()+lissajousAnim =+ testAnim 20+ (map (\phase -> polyline+ (map(\i ->+ let angle = (fromInteger i / 100 * 2*pi)::Double+ in (250+round(200*sin (2.3*(angle+phase)+phase)),+ 250+round(200*sin (3*(angle+phase))))) [0..100]))+ [0,0.05..])+++kreispunkte :: (Double, Double) -> Double -> Int -> Double -> Double+ -> [(Double, Double)]+kreispunkte (mx,my) radius n start inc =+ map (\angle ->+ let x = mx + radius * cos angle+ y = my + radius * sin angle+ in (x, y))+ (take n (iterate (inc+) start))++roundPoint :: (Double, Double) -> Point+roundPoint (x,y) = (round x, round y)+++sternAnim :: IO ()+sternAnim =+ runWindowEx "graphic demo" Nothing (500,500) DoubleBuffered (Just 33) $+ \w -> do+ let rgbs = map (\green -> RGB 255 green 0) [0,5..255]+ pens <- sequence (zipWith (createPen Solid) (map (flip div 5) [0..]) rgbs)+ mapM_ (\phase -> setGraphic w (+ let size = (1 + sin (3*phase)) / 2+ in selectPen (pens !! round (size * fromIntegral (length pens - 1)))+ >> polyline (map roundPoint+ (kreispunkte (250,250) (40 + 160*size) 10 phase (8/9*pi))))+ >> getWindowTick w) [0,0.03..]+++sternenkreisAnim :: IO ()+sternenkreisAnim =+ let stern phase m =+ polygon (map roundPoint (kreispunkte m 50 6 phase (2*2*pi/5)))+ in testAnim 20+ (map (\phase -> overGraphics+ (map (stern (-phase))+ (kreispunkte (250, 250) 150 7 phase (2*pi/7))))+ [0,0.02..])++polygonMove :: Num a => (a,a) -> [(a,a)] -> [(a,a)]+polygonMove (dx,dy) = map (\(x,y) -> (x+dx,y+dy))++polygonTurn :: Floating a => a -> [(a,a)] -> [(a,a)]+polygonTurn angle =+ polygonOrtho (cos angle, sin angle)++polygonOrtho :: Num a => (a,a) -> [(a,a)] -> [(a,a)]+polygonOrtho (rx,ry) =+ map (\(x,y) -> (x*rx-y*ry,x*ry+y*rx))++norm :: Floating a => (a,a) -> a+norm (x,y) = sqrt (x^2+y^2)++normalize :: Floating a => (a,a) -> (a,a)+normalize (x,y) =+ let n = norm (x,y)+ in (x/n, y/n)++lok :: Num a => [(a,a)]+lok =+ [( 0, 0), ( 0,130), ( 80,130), ( 80,70),+ ( 20,70), ( 20,110), ( 60,110), ( 60,70),+ (170,70), (165,120), (185,120), (180,70),+ (190,70), (200, 0), ( 0, 0)]++lok' :: Num a => [(a,a)]+lok' =+ [( 0, 0), ( 0,130), ( 80,130), ( 80,70),+ ( 20,70), ( 20,110), ( 60,110), ( 60,70),+ (170,70), (165,120), (185,120), (180,70),+ (190,70), (200, 0),+ (155, 0), (150, 10), (145, 0),+ ( 55, 0), ( 50, 10), ( 45, 0),+ ( 0, 0)]++flipY :: Num a => [(a,a)] -> [(a,a)]+flipY = map (\(dx,dy) -> (dx,-dy))++wagenAnim :: IO ()+wagenAnim =+ testAnim 20+ (map (\zeit ->+ let (pos, dreh) = properFraction (zeit::Double)+ angle = dreh * pi/2+ laenge = 50+ dx = round (laenge * sin angle)+ dy = round (laenge * cos angle)+ dx2 = round (laenge/sqrt 2 * sin (angle-pi/4))+ dy2 = round (laenge/sqrt 2 * cos (angle-pi/4))+ x = pos * round laenge+ y = 300+ quadrat (mx,my) =+ polyline [(mx, my), (mx+dx, my-dy),+ (mx+dx-dy, my-dx-dy), (mx-dy, my-dx),+ (mx, my)]+ wanne m =+ polygon (polygonMove m (flipY lok))+ in overGraphics [quadrat (x-100,y), quadrat (x,y),+ wanne (x + dx2-150, y - dy2)])+ [0,0.025..])++circle, circleFill, circleFill' :: Int -> Point -> Graphic+circle = circlePoly 20 0+circleFill' r (x,y) = arc (x-r,y-r) (x+r,y+r) 0 270+circleFill r (x,y) = ellipse (x-r,y-r) (x+r,y+r)++circlePoly :: Int -> Double -> Int -> Point -> Graphic+circlePoly n angle r (x,y) =+ polyline (map roundPoint+ (kreispunkte (fromIntegral x, fromIntegral y)+ (fromIntegral r) (n+1) angle (2*pi/fromIntegral n)))++wheel :: Double -> Double -> (Double, Double) -> Graphic+wheel radius angle (xd,yd) =+ let dx = round (radius * sin angle)+ dy = round (radius * cos angle)+ x = round xd+ y = round yd+ in overGraphics [circlePoly 20 angle (round radius) (x,y),+ polyline [(x-dx,y+dy),(x+dx,y-dy)],+ polyline [(x-dy,y-dx),(x+dy,y+dx)]]++holperAnim0 :: IO ()+holperAnim0 =+ testAnim 5+ (map (\zeit ->+ let radius = 25+ mount = 10+ wheelDist = 100+ angle = zeit * pi/2+ mx = mount * sin angle+ my = mount * cos angle+ x = angle * radius+ y = 300+ wanne m = polygon (polygonMove m (flipY lok))+ in overGraphics [wheel radius angle (x,y),+ wheel radius angle (x-wheelDist,y),+ wanne (round (x+mx - 150), round (y-my))])+ [0,0.025..])++holperAnim1 :: IO ()+holperAnim1 =+ testAnim 5+ (map (\zeit ->+ let radius = 25+ mount = 15+ angle = zeit * pi/2+ mx = mount * sin angle+ my = mount * cos angle+ x = angle * radius+ y = 300+ xLW = x+mx-wheelDistX+ angleLW = xLW / radius+ wheelDist = 100+ wheelDistX = sqrt(wheelDist^2 - my^2)+ wanne m = polygon (map roundPoint (polygonMove m (flipY+ (polygonOrtho (normalize (wheelDistX,my))+ (polygonMove (-150,0) lok)))))+ in overGraphics [wheel radius angle (x, y),+ wheel radius angleLW (xLW,y),+ wanne (x+mx, y-my)])+ [0,0.025..])+++{- Inverse cycloid function. -}+cycloidAngle :: Floating a => a -> a -> a -> a -> (a,a) -> [a]+cycloidAngle t0 radius mount d (x,y) =+ let f t = let ct = cos t+ st = sin t+ xt = radius * t + mount * ct - x+ yt = mount * st - y+ in (xt^2+yt^2,+ 2 * (xt * (radius - mount * st) + yt * mount * ct))+ in Newton.inverse t0 f (d^2)++propCycloidAngle :: Floating a => a -> a -> (a,a) -> ((a,a), (a,a))+propCycloidAngle radius d (x,y) =+ let sq = sqrt (d^2-y^2)+ t0 = (x - sq) / radius+ t1 = (x + sq) / radius+ in ((t0, cycloidAngle (2*t0) radius 0 d (x,y) !! 10),+ (t1, cycloidAngle (2*t1) radius 0 d (x,y) !! 10))+++holperAnim :: IO ()+holperAnim =+ testAnim 5+ (map (\zeit ->+ let radiusRW = 25+ radiusLW = 35+ mountRW = 15+ mountLW = 20+ yRW = 300+ yLW = yRW-radiusLW+radiusRW+ angleRW = zeit * pi/2+ dxRW = mountRW * cos angleRW+ dyRW = mountRW * sin angleRW+ dxLW = mountLW * cos angleLW+ dyLW = mountLW * sin angleLW++ wheelDist = 100+ angleLW =+ cycloidAngle+ ((xRW-wheelDist)/radiusLW) radiusLW mountLW+ wheelDist (xRW+dxRW,dyRW+yRW-yLW) !! 10+ xLW = angleLW * radiusLW+ xRW = angleRW * radiusRW+ wanne m = polygon (map roundPoint (polygonMove m (flipY+ (polygonOrtho+ (normalize (xRW+dxRW-(xLW+dxLW),+ -(yRW+dyRW)+(yLW+dyLW)))+ (polygonMove (-150,0) lok)))))+ in overGraphics [wheel radiusRW angleRW (xRW,yRW),+ wheel radiusLW angleLW (xLW,yLW),+ wanne (xRW+dxRW, yRW+dyRW)])+ [0,0.025..])++++{- |+probabilistic Sierpinski triangle++See Computer Graphics I lecture at the university of Halle.+-}+sierpinskiPoints :: (Fractional a, RandomGen g) =>+ g -> ((a,a), (a,a), (a,a)) -> [(a,a)]+sierpinskiPoints g (t0,t1,t2) =+ let vertices = listArray (0,2::Int) [t0,t1,t2]+ in scanl1 (\(xt,yt) (xk,yk) -> ((xt+xk)/2, (yt+yk)/2))+ (map (vertices!) (randomRs (bounds vertices) g))++sierpinski :: IO ()+sierpinski =+ let ps = ((0, 0), (1, 0), (0.5, sqrt 3 / 2))+ size = 1000+ toInt :: Double -> Int+ toInt x = round (x * fromIntegral size)+ setDot p = polyline [p, p]+ graphics = map (\(x,y) -> setDot (toInt x, toInt y))+ (sierpinskiPoints (mkStdGen 834750) ps)+ in runWindow "Sierpinski" (size,size)+ (\w -> mapM_ (directDraw w) graphics)
+ src/Main.hs view
@@ -0,0 +1,43 @@+module Main where++import GraphicDemo as G++import System.Environment (getArgs, )+import System.Exit (exitWith, ExitCode(..), )+import Control.Monad (when, )+++demos :: [(String, IO ())]+demos =+ ("text", textAnim) :+ ("triangle", dreieck) :+ ("17angle", siebzehneck) :+ ("spiral", spirale) :+ ("double-spiral", doppelSpirale) :+ ("rotating-spiral", spiraleAnim) :+ ("lissajous", lissajous) :+ ("rotating-lissajous", lissajousAnim) :+ ("rotating-star", sternAnim) :+ ("star-circle", sternenkreisAnim) :+ ("locomotive-0", wagenAnim) :+ ("locomotive-1", holperAnim0) :+ ("locomotive-2", holperAnim1) :+ ("locomotive-3", holperAnim) :+ ("sierpinski", sierpinski) :+ []+++main :: IO ()+main =+ do args <- getArgs+ when (null args)+ (putStrLn "no demo name given" >>+ exitWith ExitSuccess)+ when (args == ["--list"])+ (mapM_ (putStrLn . fst) demos >>+ exitWith ExitSuccess)+ mapM_+ (\demo ->+ maybe (putStrLn $ "unkown demo: " ++ demo) id $+ lookup demo demos)+ args