How to check if two objects collide without a collider

Questions & Answers
1

hey, so i have a project where something when collides with a line renderer it dies but this line renderer is always moving/updating so i cant have an collider on it. So i want to know if there is a way to check it without a collider

2

I can see two (tree actually) ways to solve this:

  1. attach some collider to the line gameobject.

  2. which is I prefer, use Physics.Raycast or Physics.Linecast. Ray is more suitable when you know the direction but don’t know what a length the line will be. so you set the direction and max distance. The Line option is if your line has fixed length.

    Vector3 origin;
    Vector3 direction; // or Vector3 endPosition; and then get direction with direction = endPosition - origin
    float maxLineLength;
    int layerOfKillableObjects // or you can use Physics.AllLLayers so ray will trigger when intersect with any objects
    void Update ()
    {
    RaycastHitInfo hitInfo;
    if (Physics.Raycast (origin, direction, out hitInfo, maxLineLength, layerOfKillableObjects, QueryTriggerInteraction.Ignore)
    {
    Transform deadMan = hitInfo.transform;
    // kill that man
    }
    }