Drawing with skrib - Cave Man Code

skrib (caveman for scribble) draws in the Draw tab of OGABOOGA CODER, or in a picture window when you run from the terminal.

The picture

The spot 0, 0 is the top-left corner. x goes right, y goes down. The default picture is 400 by 400.

skrib size 400, 400

Commands

Write this	It draws
`skrib color "red"`	pick a color (names or `"#ff8800"`)
`skrib dot x, y, r`	a filled circle (a dot)
`skrib circle x, y, r`	an outline circle
`skrib line x1, y1, x2, y2`	a line
`skrib box x, y, w, h`	an outline rectangle
`skrib blob x, y, w, h`	a filled rectangle
`skrib write "words", x, y`	text on the picture
`skrib clear`	wipe the picture

Color names include the usual ones: "red", "orange", "gold", "green", "blue", "purple", "brown", "black", "white", "skyblue", and any hex color like "#ff8800".

A sun

skrib size 400, 400
skrib color "gold"
skrib dot 200, 200, 60
skrib color "orange"
booga 12
    grunk angle_x = 200 + 90 * small(1, lap % 2)
    skrib line 200, 200, angle_x, 20 + lap * 30
unga

A house

skrib size 400, 400
skrib color "skyblue"
skrib blob 0, 0, 400, 260
skrib color "green"
skrib blob 0, 260, 400, 140
skrib color "brown"
skrib blob 140, 150, 120, 130
skrib color "red"
skrib line 120, 150, 200, 80
skrib line 200, 80, 280, 150
skrib color "gold"
skrib box 180, 190, 40, 40
skrib color "black"
skrib write "home", 170, 300
oga "Drew a home!"

Moving things: wait

wait(milliseconds) pauses the program. 1000 milliseconds is one second. Draw, wait, clear, draw again -- that is animation:

skrib size 300, 300

booga 20
    skrib clear
    skrib color "purple"
    skrib dot 30 + lap * 12, 150, 15
    wait(80)
unga

oga "The dot ran across the screen!"

The STOP button still works while wait is running.

Drawing with loops and math

skrib size 400, 400
skrib color "teal"

booga 30
    skrib circle 200, 200, lap * 6
unga

skrib size 400, 400
skrib color "purple"

grunk x = 200
grunk y = 20
booga 30
    grunk nx = x + 4 * lap
    grunk ny = y + 12
    skrib line x, y, nx, ny
    x = nx
    y = ny
unga

Saving your picture

OGABOOGA CODER does not save pictures yet -- use a screenshot, or write a program that draws the same thing every time (that is why code is better than a paint program!).

Drawing in the terminal

cmc run picture.cmc opens a window with the drawing. The window stays open after the program ends, so you can look at the art. Close it when you are done.

If the drawing does nothing, you are probably running in a place with no windows (like a server). The program still runs, it just cannot show the picture.

Next: Errors -- what to do when OOGA happens.