flutter_turtle 0.2.0

flutter_turtle is a simple implementation of turtle graphic. It simply uses a custom painter to draw graphics into a widget by a series of Logo-like commands.

flutter_turtle

flutter_turtle is a simple implementation of turtle graphics for Flutter. It simply uses a custom painter to draw graphics by a series of Logo-like commands.

For further information about turtle graphics, please visit Wikipedia:

• https://en.wikipedia.org/wiki/Turtle_graphics
• https://en.wikipedia.org/wiki/Logo_(programming_language)

Why I Make This?

It is always fun to make your own DSL!

Example

A quick example:

@override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text(widget.title)),
      body: TurtleView(
        child: Container(),
        commands: [
          PenDown(),
          SetColor((_) => Color(0xffff9933)),
          SetStrokeWidth((_) => 2),
          Repeat((_) => 20, [
            Repeat((_) => 180, [
              Forward((_) => 25.0),
              Right((_) => 20),
            ]),
            Right((_) => 18),
          ]),
          PenUp(),
        ],
      ),
    );
  }

Commands

Currently supported commands are including:

Turtle Motion

• PenDown
• PenUp
• Left
• Right
• Forward
• Back
• SetColor
• SetStrokeWidth
• GoTo
• ResetPosition
• ResetHeading

Flow Control

• IfElse
• Repeat

Macros

• SetMacro
• RunMacro

Misc

• Exec