tnydwrds / roll-a-ball-swift

Unity's Roll-A-Ball tutorial implemented in Swift

roll-a-ball-swift

Unity's Roll-A-Ball tutorial implemented in Swift

Requirements:

• Unity 5.4.0f3 to run the project
• RemObjects Fire 8.4.96.2033 (beta) to modify source and game logic DLL

Overview

The project leverages Unity's support for managed plugins. This allows usage of DLLs generated by external compilers. To create a DLL, the project uses the RemObjects Elements compiler and their Swift implementation, Silver.

Since Assets/Plugins/GameLogic.dll is provided in the repo, you should be able to just run the Unity project as is. I only tested on macOS and iOS however. For iOS, the game builds but there is no touch input implemented.

In addition to the standard Unity project directories, the GameLogicSolution solution includes GameLogic and UnityAspect projects.

GameLogic Project

The GameLogic project implements the game logic. Similar to Roll-a-ball-FSharp, the source is a direct translation of the tutorial's C# to Swift. Also, the source is in one file since it's so trivial.

UnityAspect Project

The UnityAspect project uses Element's support for Aspects. It exposes an attribute that will publicize a Swift class property's underlying field for the Unity editor. This is necessary because Swift properties translate to properties, but Unity editor seems to work with serialized fields. In order to edit a property in the Unity editor, you will need to add the @UnityAspect.PublicizeField attribute to it.

Caveats

RemObjects provides an optional Swift Base Library.

It provides some of the core types, classes and functions that, while not part of the Swift language spec per se, are commonly used in Swift apps (and provided in a similar Swift Base Library in Apple's implementation).

Unfortunately, it requires .NET 4.0 which Unity does not use.