Trigger Force [Basic script question]

Questions & Answers
1

Hi, very basic scripting question- I have a cube with a trigger script attached to it:

var power : float = 500.0;

function OnTriggerEnter (player : Collider) {
	if(player.tag=="Player")
	rigidbody.AddForce(Vector3(0,power,0));

}

Instead of the force effecting the trigger cube however, I would like to effect the player. How would I write this?

Thanks!

2

If the player is a rigidbody, you could write this:

var power : float = 500.0;
 
function OnTriggerEnter (player : Collider) {
    if (player.tag=="Player")
        player.rigidbody.AddForce(Vector3(0,power,0));
}

This will produce errors if the player isn’t a non-kinematic rigidbody. If the player is a CharacterController, add the ImpactReceiver script below to it and modify the OnTriggerEnter code a little:

ImpactReceiver.js:

var mass = 3.0; // defines the character mass
var impact = Vector3.zero; // momentum
private var character: CharacterController;

function Start(){
  character = GetComponent(CharacterController);
}

// call this function to add an impact force:
function AddImpact(force: Vector3){
  if (force.y < 0) force.y = -force.y; // reflect down force on the ground
  impact += force / mass;
}

function Update(){
  // apply the impact force:
  if (impact.magnitude > 0.2) character.Move(impact * Time.deltaTime);
  // consumes the impact energy each cycle:
  impact = Vector3.Lerp(impact, Vector3.zero, 5*Time.deltaTime);
}

The OnTrigger code should be modified like below:

var power : float = 500.0;
 
function OnTriggerEnter (player : Collider) {
    if (player.tag=="Player")
        player.GetComponent(ImpactReceiver).AddImpact(Vector3(0,power,0));
 
}