ray-aabb-intersection

Determine the point of intersection between a ray and axis-aligned bounding box (AABB). Theoretically works in an arbitrary number of dimensions!

Many thanks to @BSVino for providing the original C++ implementation and accompanying videos.

view demo

Usage

out = intersection(out, origin, dir, aabb)

Determines if the given ray (origin, direction) intersects with the aabb.

If no intersection occurs, returns null. Otherwise, the intersection point is stored in out and then returned.

const origin = new Float32Array([0, 4, 0])
const dir = new Float32Array([0, 1, 0])
const out = new Float32Array(3)

const aabb = [
  [-1, -1, -1],
  [+1, +1, +1]
]

intersection(out, origin, dir, aabb)

d = intersection.distance(origin, dir, aabb)

Returns the distance from the given ray (origin, direction) to the supplied aabb. If no intersection occurs, returns Infinity.

Note that the direction vector should be normalized.

See Also

• ray-aabb — faster, but doesn't provide the point of intersection.
• ray-sphere-intersection
• ray-plane-intersection
• ray-triangle-intersection
• camera-picking-ray

License

MIT, see LICENSE.md for details.