UNITY Lose one life when player hits the water - unity3d

Question

I want to change the number of lives every time the player hits the water. I wrote this code so far:
public var dieSound:AudioClip;
static var lives = 3;
function Start () {
}
function Update () {
if(lives == 0)
{
Application.LoadLevel("menu");
}
}
public function OnGUI()
{
GUI.backgroundColor = Color.blue;
GUI.Button (Rect (10, 10, 100, 30), "Lives: " + lives);
}
function OnControllerColliderHit (hit : ControllerColliderHit)
{
if (hit.collider.tag == "Water")
{
// play dying sound
audio.PlayOneShot(dieSound);
// show mission fail UI
GameObject.Find("MissionTXT").guiText.enabled = true;
// wait until it's ended
yield WaitForSeconds(dieSound.length + 0.01);
transform.position = GameObject.FindWithTag("Respawn").transform.position;
if (transform.position == GameObject.FindWithTag("Respawn").transform.position)
{
GameObject.Find("MissionTXT").guiText.enabled = false;
lives = lives - 1;
}
}
}
The problem is that when the player hits the water, lives change from 3 to -120. I think that happens because the player is on the water for like 6-7 seconds. So character may hits the water 120 times until he goes back to the original position (Respawn position).
Can anyone help me with that please?

Answer 1

The first thing that comes to mind is as follows:
On your water GameObject, add a Collider component. I would think that a BoxCollider would fit in this scenario. Don't forget to mark the Is Trigger checkbox.
On your player GameObject, add both a RigidBody and a CharacterController (since it looks like you are using the CharacterController component). Make sure to check the RigidBody's Is Kinematic checkbox. Also, give your GameObject a meaningful tag like "Player".
Back to the water GameObject, add a new script that should look something like this:
public class Water : MonoBehaviour {
void OnTriggerEnter(Collider collider) {
if(collider.CompareTag("Player")) {
collider.SendMessage("Kill");
}
}
}
Back to the player GameObject, add a new script that should look something like this:
public class Player : MonoBehaviour {
public void Kill() {
//Perform all necessary steps to kill the player such as...
//Reduce the amount of lives by 1
//Play the death sound
//etc. etc. etc.
}
}
That's the "jist" of things, or this should at least get you started. Unity has some really good documentation and practically anything you need is there, you just have to know where to look. I'm not going to go in-depth of each thing I have mentioned above because as I've said, "Unity has some really good documentation." With that in mind, I highly recommend looking into each of the things I have mentioned. Hope this helps! =)