koobas.hobune.stream
Enemy health script using raycast not destroying tagged object
So I have this code
var Health = 100;
public static var cHealth = 100;
var HealthD : GUIText;
function Start() {
DisplayAmount();
}
function DisplayAmount () {
HealthD.text = ""+ cHealth;
}
function Update ()
{
// if you press Mouse Button
if (Input.GetMouseButtonDown(0)){ // if you press Left Mouse Button -> GetMouseButtonDown(0)
var hit: RaycastHit;
var ray = Camera.main.ScreenPointToRay(Input.mousePosition); // it sends a ray from Camera.main
if (Physics.Raycast(ray, hit)){ // if it hits something
if (hit.collider.gameObject.tag == "beep"){
cHealth += -10;
HealthD.text = ""+ cHealth;
if (cHealth <= 0){
if (hit.collider.GameObject.tag == "beep"){
DestroyObject(gameObject);
}
}
}
}
}
And when the enemies health gets to 0, I get the error:
"NullReferenceException: Object reference not set to an instance of an object Boo.Lang.Runtime.RuntimeServices.GetDispatcher (System.Object target, System.String cacheKeyName, System.Type[] cacheKeyTypes, Boo.Lang.Runtime.DynamicDispatching.DispatcherFactory factory) Boo.Lang.Runtime.RuntimeServices.GetDispatcher (System.Object target, System.Object[] args, System.String cacheKeyName, Boo.Lang.Runtime.DynamicDispatching.DispatcherFactory factory) Boo.Lang.Runtime.RuntimeServices.GetProperty (System.Object target, System.String name) UnityScript.Lang.UnityRuntimeServices.GetProperty (System.Object target, System.String name) raycast.Update () (at Assets/raycast.js:21)"
rather than the object being destroyed. I used to have the code like this:
var Health = 100;
public static var cHealth = 100;
var HealthD : GUIText;
function Start() {
DisplayAmount();
}
function DisplayAmount () {
HealthD.text = ""+ cHealth;
}
function Update ()
{
// if you press Mouse Button
if (Input.GetMouseButtonDown(0)){ // if you press Left Mouse Button -> GetMouseButtonDown(0)
var hit: RaycastHit;
var ray = Camera.main.ScreenPointToRay(Input.mousePosition); // it sends a ray from Camera.main
if (Physics.Raycast(ray, hit)){ // if it hits something
if (hit.collider.gameObject.tag == "beep"){
cHealth += -10;
HealthD.text = ""+ cHealth;
if (cHealth <= 0){
DestroyObject(gameObject);
}
}
}
}
but this ended up destroying the first person controller rather than the enemy. Could anyone tell me what is wrong?
I'm not really understanding this code. Is this on the enemies? It does NOT seem like it should be. It seems like a component on the controller? If so, DestroyObject(gameObject); is what's doing it.
Could you give some more info? It look like this script looks to see if you clicked on an gameObject with a tag of "beep". If so, reduce the players health by 10. If health <= 0. destroy the player gameObject.
The script is on the first person controller, sorry for not clarifying. If I click on an object tagged with "beep" using raycast I get the error: "NullReferenceException: Object reference not set to an instance of an object " rather than it decreasing the object's health.
Well I am guessing that you have put this one you first person controller, if so you need to separate scripts one for the enemy, and one for the controller. The first script would be like this:
function Start()
{
}
function Update ()
{
if (Input.GetMouseButtonDown(0)){
var hit: RaycastHit;
var ray = Camera.main.ScreenPointToRay(Input.mousePosition);
if (Physics.Raycast(ray, hit)){
if (hit.collider.CompareTag("Beep")){
hit.collider.gameObject.SendMessage("Damage");
}
}
}
}
Second script,(Enemy health), would be like this:
private var Health = 100;
function Start(){
}
function Update(){
if(Health <= 0){
Destroy(gameObject);
}
}
function Damage(){
Health -= 10;
}
You could add the function that shows the health at the end.
This method shoots out a ray sees if it hits an object with the tag beep and if does sends a message Damage which the enemy picks up, then it minuses 10 health, then finally the enemy checks if it has any health left if not it destroys itself.
