Both object A and object B have a kinematic rigid body attached; Interpolate: Interpolate, Collision Detection: Continous Speculate.
I’m using onTriggerEnter to detect the collision.
The problem is both object A and object B is moving very fast. And as you probably already know the faster an object moves the greater the travel distance between frames. So in one frame, there is a good amount of distance between object A and objectB and in the next frame object A pass-through object B.
My question is, is there a way to detect collision immediately on the impact between object A and object B? I know about raycasting and based on what I learn it’s expensive and it’s mostly used for extremely fast moving objects like a bullet.
Raycasts are only expensive when you use hundreds of them per frame. I’m using =~20 per frame on my project and it does not hurt performance heavily. But what you should use in this case if the collider’s bounds. If the closest distance from A to the bounds of B is smaller than the radius of A, than the ball is getting through B. Luckily, unity already has the functions for us. Code would look like:
Collider ColliderB = B.GetComponent<ColliderB>();
float distance = colliderB.bounds.sqrDistance;
if(distance <= A.radius){
//the direction for going away
Vector3 vector = A.transform.position - B.transform.position;
//goes away by the distance to the collider + the radius of the ball
A.transform.position += vector.normalized * (distance + A.radius)
}
