graphics

Value Members

1. def angle(degrees: Double, length: Double, color: Color = black, width: Double = 1): Image

   

   Draws a line at an angle.

   Draws a line at an angle.

   Draws a line from (length,length) of length length. The angle between the x-axis and the line is given by degrees.

   Examples

   angle(0, 10) draws a horizontal line from (10, 10) to (20, 10) angle(90, 10) draws a vertical line from (10, 10) to (10, 20)

   degrees

   the angle of the line, specified in degrees

   length

   the length of the line

   color

   (optional) the color; black by default

   width

   (optional) the width; 1 by default

2. def animate[T](init: T, draw: (T) ⇒ Image, width: Int = 400, height: Int = 400, tick: (T) ⇒ T = identity[T], keyPressed: (String, T) ⇒ T = ignoreKey[T], keyReleased: (String, T) ⇒ T = ignoreKey[T], refreshRate: Double = 35): T

   

   Starts the program

   Starts the program

   Starts the program in the init state and draws the state using the draw argument. There are many optional arguments that you can provide to customize the behavior of the program. For example, you can use the tick argument to update the state to build an animation.

   init

   the initial state of the program

   draw

   a function from states to Images, which is called on each tick

   width

   (optional) the width of the window; 400 by default

   height

   (optional) the height of the window; 400 by default

   tick

   (optional) a function to update the state; the default value is the identity function

   refreshRate

   (optional) the number of times per second that draw and tick will be applied; the default value is 35 tickes per second

   returns

   the last value of the state before the window is closed

3. def black: Color

   

   The color black

4. val blank: Image

   

   A blank image

   A blank image

   This image does not appear. But, it is often useful as a base-case when writing image-building functions.

5. def blue: Color

   

   The color blue

6. def fillRect(width: Double, height: Double, color: Color = black): Image

   

   Draws a filled rectangle

   Draws a filled rectangle

   Draws a filled rectangle with width width and height height.

   Examples:

   fillRect(100, 30, red) draws a short, red rectangle fillRect(100, 100, blue) draws a blue square

   width

   the width of the rectangle

   height

   the height of the rectangle

   color

   (optional) the color of the line; black by default

7. def green: Color

   

   The color green

8. def ignoreKey[T](key: String, state: T): T

   

   Ignores pressed keys

9. def line(x: Double, y: Double, color: Color = black, width: Double = 1): Image

   

   Draws a line

   Draws a line

   Draws a line from (0,0) to (x,y).

   Examples:

   line(100, 0, red) draws a horizonal, red line.

   line(0, 100, blue, 10) draws a thick, vertical, blue line.

   x

   the x-coordinate of the end-point

   y

   the y-coordinate of the end-point

   color

   (optional) the color of the line; black by default

   width

   (optional) the width of the line; 1 by default

10. def move(image: Image, x: Double, y: Double): Image

    

    Moves an image

    Moves an image

    Moves an image x pixels horizontally and y pixels vertically.

    Examples:

    overlay(move(rect(10, 10, blue), 5, 5), rect(20, 20, red)) draws a blue square centered inside a red square.

    image

    the image to draw

    x

    the x offset of the image

    y

    the y offset of the image

11. def oval(width: Double, height: Double, color: Color = black): Image

    

    Draws an oval

    Draws an oval

    Draws an oval with width width and height height.

    Examples:

    oval(10, 100, blue) draws a tall and thin blue oval oval(100, 100, red) draws a red circle with diameter 100

    height

    the height of the oval

    color

    (optional) the color of the oval; black by default

12. def overlay(top: Image, bot: Image): Image

    

    Overlays one image on top of another.

    Overlays one image on top of another.

    Draws the top image on top of bot.

    Examples:

    overlay(rect(10, 10, blue), rect(20, 20, red)) draws a blue square inside a red square.

    top

    the image to draw on top

    bot

    the image to draw on the bottom

13. def rect(width: Double, height: Double, color: Color = black): Image

    

    Draws a rectangle

    Draws a rectangle

    Draws a rectangle with width width and height height.

    Examples:

    rect(100, 30, red) draws a short, red rectangle rect(100, 100, blue) draws a blue square

    width

    the width of the rectangle

    height

    the height of the rectangle

    color

    (optional) the color of the line; black by default

14. def red: Color

    

    The color red

15. def rgb(red: Double, green: Double, blue: Double): Color

    

    A color defined by its red, green, and blue values

    A color defined by its red, green, and blue values

    red

    the amount of red, in the range 0.0-1.0

    green

    the amount of green, in the range 0.0-1.0

    blue

    the amount of blue, in the range 0.0-1.0

16. def saveImage(fileName: String, image: Image, width: Int = 400, height: Int = 400): Unit

    

    Save an image to a file

17. def show(image: Image, width: Int = 400, height: Int = 400): Unit

    

    Shows an image

    Shows an image

    Shows an image in a window.

    image

    the image to draw

    width

    (optional) the width of the window; 400 by default

    height

    (optional) the height of the window; 400 by default

18. def solidOval(width: Double, height: Double, color: Color = black): Image

    

    Draws a solid oval

    Draws a solid oval

    Draws an oval with width width and height height.

    Examples:

    solidOval(10, 100, blue) draws a tall and thin blue oval solidOval(100, 100, red) draws a red circle with diameter 100

    width

    the width of the oval

    height

    the height of the oval

    color

    (optional) the color; black by default