Need Help With Bowling Hit Count

Unity Engine
1

Hello there, firstly, sorry for my English, it’s not my native language. I’m currently working on a bowling game for my thesis, and i am not able to count hits in a bowling game. I was working in c# with “void OnCollisionEnter” method,

using UnityEngine;
using System.Collections;

public class KeepScore : MonoBehaviour {

	Vector3 defpos;
	Vector3 defrot;
	Vector3 defangle;
	bool isCollidedWithPin = false;
	bool isCollidedWithSphere = false;

	// Use this for initialization
	void Start () {
		defpos = transform.position;
		defrot = transform.rotation.eulerAngles;
		defangle = transform.eulerAngles;
	}
	
	// Update is called once per frame
	void Update () {
		Debug.Log (MainScore.mainScore);
	}

	void OnCollisionEnter(Collision c){
		if (isCollidedWithSphere == false  c.transform.name.Equals("Pin")){
			isCollidedWithPin = true;
			StartCoroutine(StartWait());
		}
		else if (isCollidedWithPin == false  c.transform.name.Equals("Sphere")){
			isCollidedWithSphere = true;
			StartCoroutine(StartWait());
		}
	}

	void reset(){
		transform.position = defpos;
		transform.eulerAngles = defangle;
		transform.rotation.eulerAngles.Set(defrot.x,defrot.y,defrot.z);
		isCollidedWithPin = false;
		isCollidedWithSphere = false;
	}

	IEnumerator StartWait(){	
		yield return new WaitForSeconds (3); 
		if ((defrot.z != transform.rotation.eulerAngles.z || defrot.x != transform.rotation.eulerAngles.x)) {
			MainScore.mainScore++;
			reset ();
		}else{
			reset ();
		}
	}
}

How can i keep hit count? It drives me crazy, in which part i’m wrong? Your help will be very appreciated.

2

Hello ugrkucuk,
Have you attached a ridgidbody to the bowling ball?
You check the collision by the name of the transform/gameObject (line 25 and line 29).
If you have not a ridgidbody on the correct object, your c.transform will be the transform of your bowling ball and not that of the pin.
Try to get the right order.

3

Yes, both pins and ball have rigidbody, my problem is kinda different here. In my scene i have four pins, i hit them with ball and they also collide with each other, because of that, score variable is increased twice, instead of 4, i get 6. How can i prevent it?

4

Don’t add to the score as you go; calculate it on the fly. Each bowling pin should have a flag that says “I’ve been hit”. Is there a script on your pins? If not, create one, and do something like:

public bool hasBeenHit = false;

public void ResetPin() {
// whatever pin reset logic goes here
hasBeenHit = false;
}
void OnCollisionEnter(Collosion c) {
//perhaps "if it's not the floor" logic should go here
hasBeenHit = true;
}

....

//In your master score-keeping script
public BowlingPin[] allPins; //either assigned in the inspector, or set in script when the pins are created

public int CountScore() {
int score=0;
for (int p=0;p<allPins.Length;p++) {
if (allPins[p].hasBeenHit) score++;
}
return score;
}

Alternative technique: Don’t track collisions at all, but simply assume that any pin that isn’t straight up should be scored. No on-pin script needed for this one:

public Transform[] allPins; //either assigned in the inspector, or set in script when the pins are created

public int CountScore() {
int score=0;
for (int p=0;p<allPins.Length;p++) {
Vector3 pinsUpVector = allPins[p].up;
if (Vector3.Angle(pinsUpVector, Vector3.up) > 1f) score++;
}
return score;
}

Second option is simpler, and won’t score pins that are still right-side-up after being hit (which is how traditional bowling is scored anyway, if I’m not horribly mistaken).

5

Your post was very helpful, it solved my problem, thank you, really!

6
7

@StarManta I tried the 2nd option you recommended but I am not getting any score.Can u pls help ?