Tortoise

A turtle graphics engine for iOS written in Swift.

This is now developing with Swift 3 and Xcode 8 beta 6.

Example

🐢.ClearScreen()
    .Make("color", 0)
    .Repeat(12) { 🐢
        .SetPenWidth(2)
        .Right(15)
        .Repeat(6) { 🐢
            .SetPenColor({ $0.PenColor + 1 })
            .Forward(50)
            .Right(60)
        }
        .SetPenWidth(1)
        .Right(15)
        .Repeat(6) { 🐢
            .Make("color", { $0["color"] + 1 })
            .SetPenColor({ $0["color"] })
            .Forward(20)
            .Right(60)
        }
    }
    .Done()

Usage

// Instantiate 🐢 with canvas size.
let 🐢 = Tortoise(canvasWidth: 300, canvasHeight: 300)

// Command 🐢 to draw.
🐢.Right(90).Forward(100).Done()

// Run and render.
🐢.run()

// Get rendered image.
let image = 🐢.renderedImage

Commands

Move and Draw

• CleanScreen
• Clean
• Forward
• Back
• Right
• Left
• Home
• SetHeading
• SetPosition
• SetX
• SetY
• Dot
• Arc

Pen and Canvas state

• PenDown
• PenUp
• SetPenColor
• SetPenWidth
• SetLineCap
• SetLineDash
• SetBackground
• SetRGB

Output

• Random
• Towards
• Shown
• Heading
• Position
• PenColor
• PenWidth
• Background
• RGB
• CanvasSize

Control

• Repeat
• ShowTortoise
• HideTortoise
• Make (Variable support)
• Print

Requirements

• Swift 3 (Xcode 8 beta 6)
• iOS 10.0 beta

Installation

T.B.D.

Roadmap

• SetCanvasSize command
• If, While, For statement support
• Procedure support
• Canvas view
• SPM/Carthage/Cocoapods installation
• macOS support