| Safe Haskell | None |
|---|
Graphics.Web.Processing.Core.Interface
Contents
Description
Variables, commands and functions. The interface to the processing.js API (http://processingjs.org/reference), with some additions, deletions and modifications.
- screenWidth :: Proc_Int
- screenHeight :: Proc_Int
- noise :: (ProcMonad m, Monad (m c)) => Proc_Point -> m c Proc_Float
- class Drawing a
- data Color = Color {}
- stroke :: (ProcMonad m, Drawing c) => Color -> m c ()
- fill :: (ProcMonad m, Drawing c) => Color -> m c ()
- background :: (ProcMonad m, Drawing c) => Color -> m c ()
- strokeWeight :: (ProcMonad m, Drawing c) => Proc_Int -> m c ()
- type Proc_Point = (Proc_Float, Proc_Float)
- ellipse :: (ProcMonad m, Drawing c) => Proc_Point -> Proc_Float -> Proc_Float -> m c ()
- circle :: (ProcMonad m, Drawing c) => Proc_Point -> Proc_Float -> m c ()
- arc :: (ProcMonad m, Drawing c) => Proc_Point -> Proc_Float -> Proc_Float -> Proc_Float -> Proc_Float -> m c ()
- line :: (ProcMonad m, Drawing c) => Proc_Point -> Proc_Point -> m c ()
- point :: (ProcMonad m, Drawing c) => Proc_Point -> m c ()
- quad :: (ProcMonad m, Drawing c) => Proc_Point -> Proc_Point -> Proc_Point -> Proc_Point -> m c ()
- rect :: (ProcMonad m, Drawing c) => Proc_Point -> Proc_Float -> Proc_Float -> m c ()
- triangle :: (ProcMonad m, Drawing c) => Proc_Point -> Proc_Point -> Proc_Point -> m c ()
- bezier :: (ProcMonad m, Drawing c) => Proc_Point -> Proc_Point -> Proc_Point -> Proc_Point -> m c ()
- polygon :: (ProcMonad m, Monad (m c), Drawing c) => [Proc_Point] -> m c ()
- drawtext :: (ProcMonad m, Drawing c) => Proc_Text -> Proc_Point -> Proc_Float -> Proc_Float -> m c ()
- size :: ProcMonad m => Proc_Int -> Proc_Int -> m c ()
- setFrameRate :: ProcMonad m => Proc_Int -> m Setup ()
- translate :: (ProcMonad m, Drawing c) => Proc_Float -> Proc_Float -> m c ()
- rotate :: (ProcMonad m, Drawing c) => Proc_Float -> m c ()
- scale :: (ProcMonad m, Drawing c) => Proc_Float -> Proc_Float -> m c ()
- resetMatrix :: (ProcMonad m, Drawing c) => m c ()
- getMousePoint :: (ProcMonad m, Monad (m c)) => m c Proc_Point
- data Key
- data ArrowKey
- data KeyModifier
- data SpecialKey
- matchKey :: (ProcMonad m, Monad (m KeyPressed)) => Var Proc_Bool -> Key -> m KeyPressed ()
- frameCount :: (ProcMonad m, Monad (m c)) => m c Proc_Int
- getFrameRate :: (ProcMonad m, Monad (m c)) => m c Proc_Int
- class ProcMonad m where
- writeComment :: Text -> m c ()
- iff :: Proc_Bool -> m c a -> m c b -> m c ()
Predefined values
Width of the canvas.
screenHeight :: Proc_IntSource
Height of the canvas.
Commands
General
noise :: (ProcMonad m, Monad (m c)) => Proc_Point -> m c Proc_FloatSource
Noise random function.
Drawing
Class of contexts where the user can draw pictures in the screen. Instances:
Instances
Colors
RGBA colors. Values must be between 0 and 255, including in the alpha channel.
background :: (ProcMonad m, Drawing c) => Color -> m c ()Source
Fill the screen with a given color.
Stroke settings
strokeWeight :: (ProcMonad m, Drawing c) => Proc_Int -> m c ()Source
Set the weight of the lines.
Figures
type Proc_Point = (Proc_Float, Proc_Float)Source
A point as a pair of floating point numbers.
Arguments
| :: (ProcMonad m, Drawing c) | |
| => Proc_Point | Center of the ellipse. |
| -> Proc_Float | Width of the ellipse. |
| -> Proc_Float | Height of the ellipse. |
| -> m c () |
Draw a ellipse.
Arguments
| :: (ProcMonad m, Drawing c) | |
| => Proc_Point | Center of the circle. |
| -> Proc_Float | Radius. |
| -> m c () |
Draw a circle.
Arguments
| :: (ProcMonad m, Drawing c) | |
| => Proc_Point | Center of the ellipse. |
| -> Proc_Float | Width of the ellipse. |
| -> Proc_Float | Height of the ellipse. |
| -> Proc_Float | Initial angle (in radians). |
| -> Proc_Float | End angle (in radians). |
| -> m c () |
Draw an arc.
The arc is drawn following the line of an ellipse between two angles.
Arguments
| :: (ProcMonad m, Drawing c) | |
| => Proc_Point | Starting point. |
| -> Proc_Point | End point. |
| -> m c () |
Draw a line.
Arguments
| :: (ProcMonad m, Drawing c) | |
| => Proc_Point | Location of the point. |
| -> m c () |
Prints a dot.
quad :: (ProcMonad m, Drawing c) => Proc_Point -> Proc_Point -> Proc_Point -> Proc_Point -> m c ()Source
A quad is a quadrilateral, a four sided polygon. The first parameter is the first vertex and the subsequent parameters should proceed clockwise or counter-clockwise around the defined shape.
Arguments
| :: (ProcMonad m, Drawing c) | |
| => Proc_Point | Location of the rectangle. |
| -> Proc_Float | Width of the rectangle. |
| -> Proc_Float | Height of the rectangle. |
| -> m c () |
Draws a rectangle to the screen. A rectangle is a four-sided shape with every angle at ninety degrees. The first parameter set the location, the second sets the width, and the third sets the height.
triangle :: (ProcMonad m, Drawing c) => Proc_Point -> Proc_Point -> Proc_Point -> m c ()Source
A triangle is a plane created by connecting three points.
Arguments
| :: (ProcMonad m, Drawing c) | |
| => Proc_Point | Initial point. |
| -> Proc_Point | First control point. |
| -> Proc_Point | Second control point. |
| -> Proc_Point | End point. |
| -> m c () |
Bézier curve.
Text
Arguments
| :: (ProcMonad m, Drawing c) | |
| => Proc_Text | Text to draw. |
| -> Proc_Point | Position. |
| -> Proc_Float | Width. |
| -> Proc_Float | Height. |
| -> m c () |
Display a text in the screen.
The color is specified by fill.
Setup
setFrameRate :: ProcMonad m => Proc_Int -> m Setup ()Source
Specify the number of frames to be displayed every second. The default rate is 60 frames per second.
Transformations
Arguments
| :: (ProcMonad m, Drawing c) | |
| => Proc_Float | Horizontal displacement. |
| -> Proc_Float | Vertical displacement. |
| -> m c () |
Move the current position.
rotate :: (ProcMonad m, Drawing c) => Proc_Float -> m c ()Source
Apply a rotation to the following pictures, centered at the current position.
Arguments
| :: (ProcMonad m, Drawing c) | |
| => Proc_Float | Horizontal scaling. |
| -> Proc_Float | Vertical scaling. |
| -> m c () |
Apply a scaling to the following pictures, centered at the current position.
resetMatrix :: (ProcMonad m, Drawing c) => m c ()Source
Reset the transformation matrix.
Mouse
getMousePoint :: (ProcMonad m, Monad (m c)) => m c Proc_PointSource
Get the current position of the mouse pointer.
Keyboard
Keyboard keys recognized by Processing.
Constructors
| CharKey Char | |
| SpecialKey SpecialKey | |
| ArrowKey ArrowKey | |
| ModKey KeyModifier Key |
matchKey :: (ProcMonad m, Monad (m KeyPressed)) => Var Proc_Bool -> Key -> m KeyPressed ()Source
Conditionals
Others
frameCount :: (ProcMonad m, Monad (m c)) => m c Proc_IntSource
Frames since the beginning of the script execution.
getFrameRate :: (ProcMonad m, Monad (m c)) => m c Proc_IntSource
Approximate number of frames per second.
Processing monads
Types in this instance form a monad when they are applied
to a context c. Then, they are used to write Processing
code.