How to leave a permanent skid mark on the ground in Unity2D?

Question

I am working on a 2D driving game.

I have a sprite of a car and I set the car movement. Now I need to create a skid mark on the ground. For that I have created an empte game object and added a Trial Renderer component and set the skid mark material to it.

The problem is that when I start moving the car, the skid mark follows the car as if the skid mark is attached to the car.

Is there any simple way to leave a permanent skid mark on the ground in Unity2D?

Answer 1

Create a prefab for the skidmark. When you want to draw a skidmark to your scene, you would instantiate this prefab.

List<GameObject> Skidmarks = new List<GameObject>();

...

void AddSkidMark() {
    //instantiate the prefab
    GameObject skid = GameObject.Instantiate(Resources.Load("SkidMark")) as GameObject;

    //Set some properties
    skid.transform.position = NewPosition;
    skid.transform.rotation = NewRotation;

    //keep reference of all skidmarks
    Skidmarks.Add(skid);
}

If you run into problems with slowdowns because you are instantiating too many skidmarks at once, you are going to want to look into pre-instantiating a bunch of skidmarks and then pooling them for future use.

Utilizing a object pooling is the proper way to tackle this issue.