https://github.com/bfollington/differ-cs

A port of differ (open source SAT collision implementation) to C#
https://github.com/bfollington/differ-cs

collision csharp sat separating-axis-theorem unity

Last synced: 2 months ago
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A port of differ (open source SAT collision implementation) to C#

• Host: GitHub
• URL: https://github.com/bfollington/differ-cs
• Owner: bfollington
• Created: 2016-04-04T14:44:21.000Z (almost 9 years ago)
• Default Branch: master
• Last Pushed: 2021-06-13T13:05:08.000Z (over 3 years ago)
• Last Synced: 2024-10-07T04:08:44.763Z (3 months ago)
• Topics: collision, csharp, sat, separating-axis-theorem, unity
• Language: C#
• Size: 18.6 KB
• Stars: 11
• Watchers: 3
• Forks: 3
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
## 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](http://en.wikipedia.org/wiki/Hyperplane_separation_theorem) collision library for C# games, intended for use in Unity.

----

## 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