headbutt

A GJK and EPA collision engine made with pure Haxe.

Usage

Create either 2D shapes or 3D shapes by implementing the appropriate interface: headbutt.twod.Shape / headbutt.threed.Shape. Or use one of the pre-defined shapes given in headbutt.twod.shapes / headbutt.threed.shapes:

• 2D
• Circle
• Line
• Rectangle
• Polygon
• 3D
• Sphere
• Line
• Box
• Polyhedron

Apply generic transformations to shapes:

var box = new Box(new Vec3(0.5, 0.5, 0.5));
box.transform = GLM.transform(
  new Vec3(5, -1, 3), // translation
  Quat.fromEuler(Math.PI / 4, 0, Math.PI / 3, new Quat()), // rotation
  new Vec3(2, 1, 4) // scale
);

Then, check shapes for intersections:

if(headbutt.twod.Headbutt.test(shapeA, shapeB)) { /*...*/ }
if(headbutt.threed.Headbutt.test(objectA, objectB)) { /*...*/ }

Alternatively, calculate intersections (note: intersection calculations haven't been implemented in 3D yet!):

var testResult = headbutt.twod.Headbutt.test(shapeA, shapeB);
var intersection = headbutt.twod.Headbutt.intersect(testResult);
// or:
var intersection = headbutt.twod.Headbutt.testAndIntersect(shapeA, shapeB);

API

API documentation is available.

Benchmarks

Benchmarks were run for each target using the results from haxe bench.hxml. The benchmarks were collected on a Ryzen 3600 CPU with 32 GB of DDR4 3200 MHz ram.