What is differ-cs?

A port of the original differ for Haxe (https://github.com/underscorediscovery/differ). The port is (where possible) a one-to-one mapping, with a few changes to the API (no more out parameters). This is a Separating Axis Theorom collision library for C# games, intended for use in Unity.

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Facts

• Supports polygons, circles, and rays currently.
• 2D only (for now).
• Includes a simple drawing interface for debugging shapes (Not in my port, in the original)
• COLLISION ONLY. No physics here. By design :)
• Contributions welcome

##Quick look

A simple collision example This is taken from the original, but this syntax is 100% compatible.

var circle = new Circle( 300, 200, 50 );
var box = Polygon.rectangle( 0, 0, 50, 150 );

box.rotation = 45;

var collideInfo = Collision.shapeWithShape( circle, box );

if(collideInfo != null) {
    //use collideInfo.separationX
    //    collideInfo.separationY
    //    collideInfo.normalAxisX
    //    collideInfo.normalAxisY
    //    collideInfo.overlap
}

Roadmap

• Unit tests, the original had none
• Clean up code style
• Implement ShapeDrawer for Unity
• Create demos