koobas.hobune.stream
Raycasthit NullRException
Well, i'm trying to make a simple Collision Side detection with raycast based on this example
But i'm getting a NullReferenceException at this line:
normal = rcashit.transform.TransformDirection(normal);
Code:
if (col.gameObject.tag == "Player") {
Ray obray = new Ray(col.gameObject.transform.position, (col.gameObject.transform.position - transform.position).normalized);
RaycastHit rcashit;
Physics.Raycast(obray, out rcashit);
Vector3 normal = rcashit.normal;
normal = rcashit.transform.TransformDirection(normal);
if (normal == rcashit.transform.right) {
t += 1;
if (t >= 30) {
PlayerController p = target.GetComponent<PlayerController>();
p.health -= 1;
t = 0;
}
}
}
Can please someone help me? Thanks!
Best Answer
You have to check the return value of Physics.Raycast() to see if the Raycast() hits anything. If the ray does not hit, then 'rcashit.transform' will be null. Something like. Alternately you could check to make sure 'rcashit.transform' is not null. But either way you do it, you need to make sure the Physics.Raycast() is hitting a game object.
if (Physics.Raycast(obray, out rcashit)) {
Vector3 normal = rcashit.normal;
normal = rcashit.transform.TransformDirection(normal);
if (normal == rcashit.transform.right) {
t += 1;
if (t >= 30) {
PlayerController p = target.GetComponent<PlayerController>();
p.health -= 1;
t = 0;
}
}
}
