KTurtle/Examples

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Tip

Script formatting results from the HTML export of KTurtle.

Note for translators

If you want to translate the scripts the best way is probably to create the script in KTurtle, export it as HTML, and insert the exported HTML in the respective Input templates. Alternatively, simply leave the scripts untranslated. A simpler solution using the syntaxhighlight tag is currently being investigated

Koch curve

This is a fractal curve. You can find more information about this at Wikipedia.

Logo script:

# Koch curve

reset
canvassize 850, 550
go 125, 350
turnright 90

learn koch $x, $t {
  if $t>0  {
    $t=$t-1
    $x=$x/3
    koch $x, $t
    turnleft 60
    koch $x, $t
    turnright 120
    koch $x, $t
    turnleft 60
    koch $x, $t
  } else {
  forward 3*$x 
  }
}
koch 200, 6

Result:

Sierpinski Triangle

Another famous fractal is the Sierpinski triangle.

Logo script:

# Sierpinski triangle

learn sierp $l {
  if $l > 2 {
    repeat 3 {
      sierp $l/2
      forward $l
      turnleft 120
    }
  }
}

reset
canvassize 600, 533
go 50, 483
turnright 90
sierp 500

Result:

Heighway Dragon

Another famous fractal is the Heighway Dragon.

Logo script:

# Heighway dragon

reset
canvassize 500, 500
go 320, 400
turnright 90
$size = 7

learn X $depth {
  if $depth>0 {
    X $depth-1
    turnleft 90
    Y $depth-1
    forward $size
  }
}

learn Y $depth {
  if $depth>0 {
    forward $size
    X $depth-1
    turnright 90
    Y $depth-1
  }
}

pencolor 0,255,0
forward $size
X 10
turnleft 90
pencolor 255,0,0
Y 10
forward $size

go 50,450

Result: