Turtle 0.1

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Turtles in a PowerShell

• Initial Release
• Builds a Turtle Graphics engine in PowerShell
• Core commands
  • Get-Turtle (alias turtle) runs multiple moves
  • New-Turtle create a turtle
  • Move-Turtle performas a single move
  • Set-Turtle changes a turtle
  • Save-Turtle saves a turtle

turtle Forward 10 Rotate 120 Forward 10 Roate 120 Forward 10 Rotate 120 |
    Set-Turtle Stroke '#4488ff' |
    Save-Turtle ./Triangle.svg

• Core Object
  • .Heading controls the turtle heading
  • .Steps stores a list of moves as an SVG path
  • .IsPenDown controls the pen
  • .Forward() moves forward at heading
  • .Rotate() rotates the heading
  • .Square() draws a square
  • .Polygon() draws a polygon
  • .Circle() draws a circle (or partial circle)
• LSystems
  • Turtle can draw a L system. Several are included:
    • BoxFractal
    • GosperCurve
    • HilbertCurve
    • KochCurve
    • KochIsland
    • KochSnowflake
    • MooreCurve
    • PeanoCurve
    • SierpinskiTriangle
    • SierpinskiCurve
    • SierpinskiSquareCurve
    • SierpinskiArrowheadCurve
    • TerdragonCurve
    • TwinDragonCurve

turtle SierpinskiTriangle 10 4 |
    Set-Turtle Stroke '#4488ff' |
    Save-Turtle ./SierpinskiTriangle.svg