Safe Haskell	None
Language	Haskell98

CodeWorld

Contents

Entry points
Pictures
Colors
Events
Debugging

Synopsis

drawingOf :: Picture -> IO ()
animationOf :: (Double -> Picture) -> IO ()
activityOf :: world -> (Event -> world -> world) -> (world -> Picture) -> IO ()
groupActivityOf :: Int -> StaticPtr (StdGen -> world) -> StaticPtr (Int -> Event -> world -> world) -> StaticPtr (Int -> world -> Picture) -> IO ()
unsafeGroupActivityOf :: Int -> (StdGen -> world) -> (Int -> Event -> world -> world) -> (Int -> world -> Picture) -> IO ()
simulationOf :: world -> (Double -> world -> world) -> (world -> Picture) -> IO ()
interactionOf :: world -> (Double -> world -> world) -> (Event -> world -> world) -> (world -> Picture) -> IO ()
collaborationOf :: Int -> StaticPtr (StdGen -> world) -> StaticPtr (Double -> world -> world) -> StaticPtr (Int -> Event -> world -> world) -> StaticPtr (Int -> world -> Picture) -> IO ()
unsafeCollaborationOf :: Int -> (StdGen -> world) -> (Double -> world -> world) -> (Int -> Event -> world -> world) -> (Int -> world -> Picture) -> IO ()
data Picture
data TextStyle
- = Plain
- | Bold
- | Italic
data Font
- = SansSerif
- | Serif
- | Monospace
- | Handwriting
- | Fancy
- | NamedFont !Text
blank :: HasCallStack => Picture
polyline :: HasCallStack => [Point] -> Picture
path :: HasCallStack => [Point] -> Picture
thickPolyline :: HasCallStack => Double -> [Point] -> Picture
thickPath :: HasCallStack => Double -> [Point] -> Picture
polygon :: HasCallStack => [Point] -> Picture
thickPolygon :: HasCallStack => Double -> [Point] -> Picture
solidPolygon :: HasCallStack => [Point] -> Picture
curve :: HasCallStack => [Point] -> Picture
thickCurve :: HasCallStack => Double -> [Point] -> Picture
closedCurve :: HasCallStack => [Point] -> Picture
thickClosedCurve :: HasCallStack => Double -> [Point] -> Picture
solidClosedCurve :: HasCallStack => [Point] -> Picture
rectangle :: HasCallStack => Double -> Double -> Picture
solidRectangle :: HasCallStack => Double -> Double -> Picture
thickRectangle :: HasCallStack => Double -> Double -> Double -> Picture
circle :: HasCallStack => Double -> Picture
solidCircle :: HasCallStack => Double -> Picture
thickCircle :: HasCallStack => Double -> Double -> Picture
arc :: HasCallStack => Double -> Double -> Double -> Picture
sector :: HasCallStack => Double -> Double -> Double -> Picture
thickArc :: HasCallStack => Double -> Double -> Double -> Double -> Picture
text :: HasCallStack => Text -> Picture
lettering :: HasCallStack => Text -> Picture
styledText :: HasCallStack => TextStyle -> Font -> Text -> Picture
styledLettering :: HasCallStack => TextStyle -> Font -> Text -> Picture
colored :: HasCallStack => Color -> Picture -> Picture
coloured :: HasCallStack => Color -> Picture -> Picture
translated :: HasCallStack => Double -> Double -> Picture -> Picture
scaled :: HasCallStack => Double -> Double -> Picture -> Picture
dilated :: HasCallStack => Double -> Picture -> Picture
rotated :: HasCallStack => Double -> Picture -> Picture
pictures :: [Picture] -> Picture
(<>) :: Semigroup a => a -> a -> a
(&) :: Picture -> Picture -> Picture
coordinatePlane :: HasCallStack => Picture
codeWorldLogo :: HasCallStack => Picture
type Point = (Double, Double)
translatedPoint :: Double -> Double -> Point -> Point
rotatedPoint :: Double -> Point -> Point
scaledPoint :: Double -> Double -> Point -> Point
dilatedPoint :: Double -> Point -> Point
type Vector = (Double, Double)
vectorLength :: Vector -> Double
vectorDirection :: Vector -> Double
vectorSum :: Vector -> Vector -> Vector
vectorDifference :: Vector -> Vector -> Vector
scaledVector :: Double -> Vector -> Vector
rotatedVector :: Double -> Vector -> Vector
dotProduct :: Vector -> Vector -> Double
data Color = RGBA !Double !Double !Double !Double
type Colour = Color
pattern RGB :: Double -> Double -> Double -> Color
pattern HSL :: Double -> Double -> Double -> Color
black :: Color
white :: Color
red :: Color
green :: Color
blue :: Color
cyan :: Color
magenta :: Color
yellow :: Color
aquamarine :: Color
orange :: Color
azure :: Color
violet :: Color
chartreuse :: Color
rose :: Color
brown :: Color
pink :: Color
purple :: Color
gray :: Double -> Color
grey :: Double -> Color
mixed :: Color -> Color -> Color
lighter :: Double -> Color -> Color
light :: Color -> Color
darker :: Double -> Color -> Color
dark :: Color -> Color
brighter :: Double -> Color -> Color
bright :: Color -> Color
duller :: Double -> Color -> Color
dull :: Color -> Color
translucent :: Color -> Color
assortedColors :: [Color]
hue :: Color -> Double
saturation :: Color -> Double
luminosity :: Color -> Double
alpha :: Color -> Double
data Event
- = KeyPress !Text
- | KeyRelease !Text
- | MousePress !MouseButton !Point
- | MouseRelease !MouseButton !Point
- | MouseMovement !Point
- | TimePassing !Double
data MouseButton
- = LeftButton
- | MiddleButton
- | RightButton
pattern PointerPress :: Point -> Event
pattern PointerRelease :: Point -> Event
pattern PointerMovement :: Point -> Event
trace :: Text -> a -> a

Entry points

drawingOf Source #

Arguments

:: Picture	The picture to show on the screen.
-> IO ()

Draws a Picture. This is the simplest CodeWorld entry point.

animationOf Source #

Arguments

:: (Double -> Picture)	A function that produces animation frames, given the time in seconds.
-> IO ()

Shows an animation, with a picture for each time given by the parameter.

activityOf Source #

Arguments

:: world	The initial state of the interaction.
-> (Event -> world -> world)	The event handling function, which updates the state given an event.
-> (world -> Picture)	The visualization function, which converts the state into a picture to display.
-> IO ()

Runs an interactive CodeWorld program that responds to events. Activities can interact with the user, change over time, and remember information about the past.

groupActivityOf Source #

Arguments

:: Int	The number of participants to expect. The participants will be ^ numbered starting at 0.
-> StaticPtr (StdGen -> world)	The initial state of the activity.
-> StaticPtr (Int -> Event -> world -> world)	The event handling function, which updates the state given a participant number and user interface event.
-> StaticPtr (Int -> world -> Picture)	The visualization function, which converts a participant number and the state into a picture to display.
-> IO ()

Runs an interactive multi-user CodeWorld program that is joined by several participants over the internet.

unsafeGroupActivityOf Source #

Arguments

:: Int	The number of participants to expect. The participants will be ^ numbered starting at 0.
-> (StdGen -> world)	The initial state of the activity.
-> (Int -> Event -> world -> world)	The event handling function, which updates the state given a participant number and user interface event.
-> (Int -> world -> Picture)	The visualization function, which converts a participant number and the state into a picture to display.
-> IO ()

A version of groupActivityOf that avoids static pointers, and does not check for consistency.

simulationOf Source #

Arguments

:: world	The initial state of the simulation.
-> (Double -> world -> world)	The time step function, which advances the state given the time difference.
-> (world -> Picture)	The visualization function, which converts the state into a picture to display.
-> IO ()

Shows a simulation, which is essentially a continuous-time dynamical system described by an initial value and step function.

interactionOf Source #

Arguments

:: world	The initial state of the interaction.
-> (Double -> world -> world)	The time step function, which advances the state given the time difference.
-> (Event -> world -> world)	The event handling function, which updates the state given a user interface event.
-> (world -> Picture)	The visualization function, which converts the state into a picture to display.
-> IO ()

Runs an interactive event-driven CodeWorld program. This is a generalization of simulations that can respond to events like key presses and mouse movement.

collaborationOf Source #

Arguments

:: Int	The number of participants to expect. The participants will be ^ numbered starting at 0.
-> StaticPtr (StdGen -> world)	The initial state of the collaboration.
-> StaticPtr (Double -> world -> world)	The time step function, which advances the state given the time difference.
-> StaticPtr (Int -> Event -> world -> world)	The event handling function, which updates the state given a participant number and user interface event.
-> StaticPtr (Int -> world -> Picture)	The visualization function, which converts a participant number and the state into a picture to display.
-> IO ()

Runs an interactive multi-user CodeWorld program, involving multiple participants over the internet.

unsafeCollaborationOf Source #

Arguments

:: Int	The number of participants to expect. The participants will be ^ numbered starting at 0.
-> (StdGen -> world)	The initial state of the collaboration.
-> (Double -> world -> world)	The time step function, which advances the state given the time difference.
-> (Int -> Event -> world -> world)	The event handling function, which updates the state given a participant number and user interface event.
-> (Int -> world -> Picture)	The visualization function, which converts a participant number and the state into a picture to display.
-> IO ()

A version of collaborationOf that avoids static pointers, and does not check for consistent parameters.

Pictures

data Picture Source #

Instances

Semigroup Picture Source #
Instance details Defined in CodeWorld.Picture Methods (<>) :: Picture -> Picture -> Picture # sconcat :: NonEmpty Picture -> Picture # stimes :: Integral b => b -> Picture -> Picture #
Monoid Picture Source #
Instance details Defined in CodeWorld.Picture Methods mempty :: Picture # mappend :: Picture -> Picture -> Picture # mconcat :: [Picture] -> Picture #

data TextStyle Source #

Constructors

Plain
Bold
Italic

Instances

Show TextStyle Source #
Instance details Defined in CodeWorld.Picture Methods showsPrec :: Int -> TextStyle -> ShowS # show :: TextStyle -> String # showList :: [TextStyle] -> ShowS #

data Font Source #

Constructors

SansSerif
Serif
Monospace
Handwriting
Fancy
NamedFont !Text

Instances

Show Font Source #
Instance details Defined in CodeWorld.Picture Methods showsPrec :: Int -> Font -> ShowS # show :: Font -> String # showList :: [Font] -> ShowS #

blank :: HasCallStack => Picture Source #

A blank picture

polyline :: HasCallStack => [Point] -> Picture Source #

A thin sequence of line segments, with these points as endpoints

path :: HasCallStack => [Point] -> Picture Source #

Warning: Please use polyline instead of path.path may be removed July 2019.

A thin sequence of line segments, with these points as endpoints

thickPolyline :: HasCallStack => Double -> [Point] -> Picture Source #

A thick sequence of line segments, with given line width and endpoints

thickPath :: HasCallStack => Double -> [Point] -> Picture Source #

Warning: Please used thickPolyline instead of thickPath.thickPath may be removed July 2019.

A thick sequence of line segments, with given line width and endpoints

polygon :: HasCallStack => [Point] -> Picture Source #

A thin polygon with these points as vertices

thickPolygon :: HasCallStack => Double -> [Point] -> Picture Source #

A thick polygon with this line width and these points as vertices

solidPolygon :: HasCallStack => [Point] -> Picture Source #

A solid polygon with these points as vertices

curve :: HasCallStack => [Point] -> Picture Source #

A smooth curve passing through these points.

thickCurve :: HasCallStack => Double -> [Point] -> Picture Source #

A thick smooth curve with this line width, passing through these points.

closedCurve :: HasCallStack => [Point] -> Picture Source #

A smooth closed curve passing through these points.

thickClosedCurve :: HasCallStack => Double -> [Point] -> Picture Source #

A thick smooth closed curve with this line width, passing through these points.

solidClosedCurve :: HasCallStack => [Point] -> Picture Source #

A solid smooth closed curve passing through these points.

rectangle :: HasCallStack => Double -> Double -> Picture Source #

A thin rectangle, with this width and height

solidRectangle :: HasCallStack => Double -> Double -> Picture Source #

A solid rectangle, with this width and height

thickRectangle :: HasCallStack => Double -> Double -> Double -> Picture Source #

A thick rectangle, with this line width, and width and height

circle :: HasCallStack => Double -> Picture Source #

A thin circle, with this radius

solidCircle :: HasCallStack => Double -> Picture Source #

A solid circle, with this radius

thickCircle :: HasCallStack => Double -> Double -> Picture Source #

A thick circle, with this line width and radius

arc :: HasCallStack => Double -> Double -> Double -> Picture Source #

A thin arc, starting and ending at these angles, with this radius

Angles are in radians.

sector :: HasCallStack => Double -> Double -> Double -> Picture Source #

A solid sector of a circle (i.e., a pie slice) starting and ending at these angles, with this radius

Angles are in radians.

thickArc :: HasCallStack => Double -> Double -> Double -> Double -> Picture Source #

A thick arc with this line width, starting and ending at these angles, with this radius.

Angles are in radians.

text :: HasCallStack => Text -> Picture Source #

A rendering of text characters.

lettering :: HasCallStack => Text -> Picture Source #

A rendering of text characters.

styledText :: HasCallStack => TextStyle -> Font -> Text -> Picture Source #

A rendering of text characters, with a specific choice of font and style.

styledLettering :: HasCallStack => TextStyle -> Font -> Text -> Picture Source #

A rendering of text characters onto a Picture, with a specific choice of font and style.

colored :: HasCallStack => Color -> Picture -> Picture Source #

A picture drawn entirely in this color.

coloured :: HasCallStack => Color -> Picture -> Picture Source #

A picture drawn entirely in this colour.

translated :: HasCallStack => Double -> Double -> Picture -> Picture Source #

A picture drawn translated in these directions.

scaled :: HasCallStack => Double -> Double -> Picture -> Picture Source #

A picture scaled by these factors.

dilated :: HasCallStack => Double -> Picture -> Picture Source #

A picture scaled by these factors.

rotated :: HasCallStack => Double -> Picture -> Picture Source #

A picture rotated by this angle.

Angles are in radians.

pictures :: [Picture] -> Picture Source #

(<>) :: Semigroup a => a -> a -> a infixr 6 #

An associative operation.

(&) :: Picture -> Picture -> Picture infixr 0 Source #

Binary composition of pictures.

coordinatePlane :: HasCallStack => Picture Source #

A coordinate plane. Adding this to your pictures can help you measure distances more accurately.

Example:

main = drawingOf (myPicture <> coordinatePlane) myPicture = ...

codeWorldLogo :: HasCallStack => Picture Source #

The CodeWorld logo.

type Point = (Double, Double) Source #

translatedPoint :: Double -> Double -> Point -> Point Source #

rotatedPoint :: Double -> Point -> Point Source #

scaledPoint :: Double -> Double -> Point -> Point Source #

dilatedPoint :: Double -> Point -> Point Source #

type Vector = (Double, Double) Source #

vectorLength :: Vector -> Double Source #

vectorDirection :: Vector -> Double Source #

vectorSum :: Vector -> Vector -> Vector Source #

vectorDifference :: Vector -> Vector -> Vector Source #

scaledVector :: Double -> Vector -> Vector Source #

rotatedVector :: Double -> Vector -> Vector Source #

Angle is in radians

dotProduct :: Vector -> Vector -> Double Source #

Colors

data Color Source #

Constructors

RGBA !Double !Double !Double !Double

Instances

Eq Color Source #
Instance details Defined in CodeWorld.Color Methods (==) :: Color -> Color -> Bool # (/=) :: Color -> Color -> Bool #
Show Color Source #
Instance details Defined in CodeWorld.Color Methods showsPrec :: Int -> Color -> ShowS # show :: Color -> String # showList :: [Color] -> ShowS #

type Colour = Color Source #

pattern RGB :: Double -> Double -> Double -> Color Source #

pattern HSL :: Double -> Double -> Double -> Color Source #

black :: Color Source #

white :: Color Source #

red :: Color Source #

green :: Color Source #

blue :: Color Source #

cyan :: Color Source #

magenta :: Color Source #

yellow :: Color Source #

aquamarine :: Color Source #

orange :: Color Source #

azure :: Color Source #

violet :: Color Source #

chartreuse :: Color Source #

rose :: Color Source #

brown :: Color Source #

pink :: Color Source #

purple :: Color Source #

gray :: Double -> Color Source #

grey :: Double -> Color Source #

mixed :: Color -> Color -> Color Source #

lighter :: Double -> Color -> Color Source #

light :: Color -> Color Source #

darker :: Double -> Color -> Color Source #

dark :: Color -> Color Source #

brighter :: Double -> Color -> Color Source #

bright :: Color -> Color Source #

duller :: Double -> Color -> Color Source #

dull :: Color -> Color Source #

translucent :: Color -> Color Source #

assortedColors :: [Color] Source #

An infinite list of colors.

hue :: Color -> Double Source #

saturation :: Color -> Double Source #

luminosity :: Color -> Double Source #

alpha :: Color -> Double Source #

Events

data Event Source #

An event initiated by the user.

Values of this type represent events that the user triggers when using an interactive program.

Key events describe the key as Text. Most keys are represented by a single character text string, with the capital letter or other symbol from the key. Keys that don't correspond to a single character use longer names from the following list. Keep in mind that not all of these keys appear on all keyboards.

Up, Down, Left, and Right for the cursor keys.
F1, F2, etc. for function keys.
Backspace
Tab
Enter
Shift
Ctrl
Alt
Esc
PageUp
PageDown
End
Home
Insert
Delete
CapsLock
NumLock
ScrollLock
PrintScreen
Break
Separator
Cancel
Help

Constructors

KeyPress !Text
KeyRelease !Text
MousePress !MouseButton !Point	Warning: Please use PointerPress instead of MousePress.MousePress may be removed July 2019.
MouseRelease !MouseButton !Point	Warning: Please use PointerRelease instead of MouseRelease.MouseRelease may be removed July 2019.
MouseMovement !Point	Warning: Please use PointerMovement instead of MouseMovement.MouseMovement may be removed July 2019.
TimePassing !Double

Instances

Eq Event Source #
Instance details Defined in CodeWorld.Event Methods (==) :: Event -> Event -> Bool # (/=) :: Event -> Event -> Bool #
Read Event Source #
Instance details Defined in CodeWorld.Event Methods readsPrec :: Int -> ReadS Event # readList :: ReadS [Event] # readPrec :: ReadPrec Event # readListPrec :: ReadPrec [Event] #
Show Event Source #
Instance details Defined in CodeWorld.Event Methods showsPrec :: Int -> Event -> ShowS # show :: Event -> String # showList :: [Event] -> ShowS #

data MouseButton Source #

Warning: Please use pointer events, which don't have buttons.MouseButton may be removed July 2019.

Constructors

LeftButton
MiddleButton
RightButton

Instances

Eq MouseButton Source #
Instance details Defined in CodeWorld.Event Methods (==) :: MouseButton -> MouseButton -> Bool # (/=) :: MouseButton -> MouseButton -> Bool #
Read MouseButton Source #
Instance details Defined in CodeWorld.Event Methods readsPrec :: Int -> ReadS MouseButton # readList :: ReadS [MouseButton] # readPrec :: ReadPrec MouseButton # readListPrec :: ReadPrec [MouseButton] #
Show MouseButton Source #
Instance details Defined in CodeWorld.Event Methods showsPrec :: Int -> MouseButton -> ShowS # show :: MouseButton -> String # showList :: [MouseButton] -> ShowS #

pattern PointerPress :: Point -> Event Source #

pattern PointerRelease :: Point -> Event Source #

pattern PointerMovement :: Point -> Event Source #

Debugging

trace :: Text -> a -> a Source #

Prints a debug message to the CodeWorld console when a value is forced. This is equivalent to the similarly named function in Trace, except that it uses the CodeWorld console instead of standard output.