CANNON.Ray(...).intersectBody doesn't update direction itself

new CANNON.Ray(vFrom, vTo).intersectBody(body) method doesn’t work without using ray.updateDirection method (which was private in cannon.js).

body.addEventListener("collide", ({ contact }) => {
  if (!grounded) {
    const vFrom = body.position;
    const vTo = new CANNON.Vec3(0, -1, 0);
    const ray = new CANNON.Ray(vFrom, vTo);
    ray.updateDirection(); // <------ I shouldnt need to update the direction 
                            //         manually before using intersectBody
    ray.intersectBody(contact.bi);
    grounded = ray.result.hasHit;
  }
});

A bug also encountered here but you should dig into the code.

Also, thanks for your port and fork !

[codynova]

After doing more digging I will need to consider this further. Updating the intersect methods API as I suggested above would cause undesirable behavior when initializing the Ray with a RayOptions that contains a result prop - and I believe this pattern may be useful for memory sharing.

The Ray intersect methods were not initially intended for manually raycasting against individual bodies, but they are suitable for it. Maybe be could develop another layer of abstraction for user-facing raycasts.

[codynova]

This does not work:

Your destructuring isn’t correct:

body.addEventListener("collide", ({ contact: bi }) => {

should be

body.addEventListener("collide", ({ contact: { bi } }) => {