koobas.hobune.stream
Trigger enter in single direction ???
Can the colliders can be directional ? i want the trigger enter to happen in only one direction and not in all the 4 directions of a box collider. is this possible to achieve please help.
this is a commonplace basic thing in game engineering.
you just use different colliders for each of the directions - it's that simple.
I'm not sure how to do this for trigger colliders. But Physics colliders can do this easily. The OnCollisionEnter method receives a Collision object. The contact points in this object provide detailed information about where the contact occurred. With a box collider it is easy to determine the side by using the normal.
void OnCollisionEnter(Collision collision) {
if (collision.contactPoints[0].normal == Vector3.up) {
// For a box collider aligned with the world axes, this was hit on top
}
}
http://docs.unity3d.com/Documentation/ScriptReference/MonoBehaviour.OnCollisionEnter.html
This is also a good place to note that Quaternion objects can be multiplied by Vector3 objects to rotate the vector.
Vector3 rotatedUp = transorm.rotation * Vector3.up;
http://docs.unity3d.com/Documentation/ScriptReference/Quaternion-operator_multiply.html
Can't be directional. If you want select collision by direction, check position of colliders in OnTriggerEnter end select what you want. If you really want create directional box collider you can merge 6 game objects with flat box collider in 1 parent object and attach to each one appropriate functions, but i don't recomended this way
