Problem with Collision Detection Counting in Unity (C#)

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1

I’m experiencing an issue with my Unity game where a collision count is being incremented at the start of the game, even though no collisions have occurred. Here is the relevant script:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Scorer : MonoBehaviour
{
int hits = 0;

private void OnCollisionEnter(Collision other)
{
    hits += 1;
    Debug.Log("You've bumped into a thing this many times: " + hits);
}

}

When the game starts, I get the message “You’ve bumped into a thing this many times: 1” even though the player hasn’t collided with anything. How can I prevent this initial collision count and ensure the counter only increments when actual collisions happen during gameplay?

Problem
Problem2002×1091 222 KB

2

If your plane has a collider, it will register a hit at the start. Put the plane on a ground layer and exclude it from the counter script.

3

Hi Shrikant,

edc237 is right. At the moment, we do not filter for anything, so each collision increments the hits.

To add restrictions, we need if-statements, which are taught in one of the next videos. Please keep watching. :slight_smile:

See also:

4

Thank You Very Much For your Help , And i understand what mistake i am doing

5

Thank You So Much Again

6

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7

You didn’t make any mistake. What you experienced in your game is the correct behaviour. The physics simulation is optimised for speed, not precision. Placing a collider directly on another collider is not a reliable solution. In Rick’s case, it worked but that’s more or less a coincidence. The only reliable solution is an if-statement that ensures that we increment hits only in a specific situation. :slight_smile: