Need Extremely Specific Collision Detection (2D)

Questions & Answers
1

So what I want to have happen is that when a bullet hits the player, the level resets as the player is effectively killed. However, there is a child of the player with a totally different tag (“Deflector”) that, when hit, should not result in a level reset. The problem is I am not sure how to get the game to check the tag of the child object so that when it hits the main player, it’s a kill, but when it hits the deflector, nothing happens.

The code looks like this.
void OnCollisionEnter2D(Collision2D Other)
{
if (Other.gameObject.tag == “Player”) {
Application.LoadLevel(Application.loadedLevel);
}
}

2

Instead of checking only player, you can check each part respectively with if-else statements. Game objects with colliders will check any collider regardless of their parents and/or children.

void OnCollisionEnter2D( Collision2D other) {
     if (Other.gameObject.tag == "Head") {     // This is the head collider, headshot
          Application.LoadLevel(Application.loadedLevel);
     }
     else if (Other.gameObject.tag == "Deflector") {     // This is the deflector collider, 
          //have player health drop here
     }
     else if (Other.gameObject.tag == "Other Body Parts") {     // This can be multiple body parts
          // have player health drop here
     }
}

I’d personally suggest using trigger colliders instead of physic colliders, and use OnTriggerEnter2D. However, that’s up to you and your game design.

3

The nested else if statements didn’t work, for reasons I can’t imagine. However you did suggest using triggers instead. The Deflector absolutely must use collisions, but the player’s collider isn’t that sacred even though I do still want one. With this in mind, I removed the deflector from a collision statement entirely (after a bit of experimenting it wasn’t completely necessary to have a collision2D statement where, after the If statement it did absolutely nothing) and put the player sphere in an OnTriggerEnter2D statement.

In other words, everything works now, thanks for your help!