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javier_lema
Asked: 2020-08-04 17:06:41 +0800 CST 2020-08-04 17:06:41 +0800 CST

Is there a way in which I can trigger functions of an object when detecting it with a Raycast2d in Unity?

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I am trying to trigger a function of an object through raycast detection, that is, I press the mouse on the screen, create a Raycast2D and detect if it collides with a 2D object, and if that happens trigger a function inside that object, for Give an example: change_color(), destroy_object(), etc. From now, thank you for your attention.

unity

1 Answers

  1. Best Answer

    Yes, it is possible, once you have stored the information from the Raycast you can use it SendMessage("nombre_funcion")to execute a function that is in the Script of the object with which you have collided. Be careful, you will have to check first that the object with which your Raycast has collided is the object that contains the function you want to call, otherwise it will throw an Exception.

    If you share the code where you implement your Raycast2D I could give you a more concrete example, but here is an example of general use:

    //Al hacer click primario instanciamos un Raycast2D
if(Input.GetKey(KeyCode.Mouse0)){

    //La información del collider que ha entrado en colisión con el Raycast2D se almacena en la variable hit
    RaycastHit2D hit = Physics2D.Raycast(transform.position , Vector2.right);

    //Si el Raycast2D colisiona con un gameobject cuyo Tag sea Enemigo, llamamos a una función que se encuentra dentro de su Script
    if (hit != null && hit.transform.gameObject.tag == "Enemigo"){
        hit.transform.gameObject.SendMessage("cambiar_color");
    }
}
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