private void OnCollisionEnter(Collision collision)
{
this.DebugCollision(true, collision);
// when colliding with a potential ground.
foreach (ContactPoint pt in collision.contacts)
{
// if the normal direction has something to do with gravity - it's good enough to be a ground!
float dotCosinus = Mover.CalculateDotProductCosine(Physics.gravity, pt.normal);
if (dotCosinus < 0f) // => the normal of the collision has a force that goes against gravity.
{
this.IsGrounded = true;
this._ground = collision.collider;
break; // no reason to look for other grounds..?
}
}
}
void DebugCollision(bool enter, Collision collision)
{
string e = "exit";
Color line = Color.blue;
if (enter)
{
e = "enter";
line = Color.red;
}
foreach (ContactPoint pt in collision.contacts)
{
float cos = Mover.CalculateDotProductCosine(
Physics.gravity, pt.normal,
out float dot
);
print($"{this.name}: [{e}] {collision.collider.name} -> normal: {pt.normal}; dot: {dot}; cos: {cos}");
Debug.DrawLine(pt.point, pt.point + pt.normal, line, 1f);
}
}
public static float CalculateDotProductCosine(Vector3 one, Vector3 another)
{
return(Mover.CalculateDotProductCosine(one, another, out float dot));
}