ray aabb intersection test using the slab method
npm install ray-aabb-slabFind the intersection between a ray and an axis-aligned bounding box (AABB) in 2 or 3 dimensional space.
ported from https://tavianator.com/fast-branchless-raybounding-box-intersections/
npm install ray-aabb-slab
``javascript
var isect = require('ray-aabb-slab')
// the origin of the ray
var origin = [-10, 0, 0];
// the direction of the ray
var direction = [1, 0, 0];
// inverted direction
var idir = [
1.0 / direction[0],
1.0 / direction[1],
1.0 / direction[2]
];
// aabb
var aabb = [
[-1, -1, -1],
[ 1, 1, 1]
];
// will contain the entry/exit t values if there is an intersection
var out = [0, 0];
if (isect(origin, idir, aabb, out)) {
console.log('entry',
origin[0] + direction[0] * out[0],
origin[1] + direction[1] * out[0],
origin[2] + direction[2] * out[0]
);
console.log('exit',
origin[0] + direction[0] * out[1],
origin[1] + direction[1] * out[1],
origin[2] + direction[2] * out[1]
)
}
/* outputs:
entry -1 0 0
exit 1 0 0
*/
``