Raycast Collision - Getting Custom Values from GameObject

Questions & Answers
1

So, I think this could be an extension of this question:

http://answers.unity3d.com/questions/141529/getting-gameobject-from-raycast-hit.html

Anyway, using Raycasts, I need to get the following information from the GameObject:

*Is a vehicle (simple boolean value)

*What type of sound to play when walking on (GameObject possibly, but grass, concrete, metal, etc.)

I’d prefer to not have to give values for each GameObject in the map. If a value isn’t found, assume False for the first set and nothing for the second. Any suggestions on how I can go about doing this?

Thank you much!

2

You can create a simple script and attach it to the game objects of interest, then set the variables in the Inspector. When hitting the object, get this script and read its variables.

The script attached to the objects could be something as short as this (let’s call it Variables.js):

enum Mat {Nothing, Metal, Grass, Concrete, Stone}; // possible materials

var vehicle: boolean = false; // change this in the Inspector, if necessary
var myMat: Mat = Mat.Nothing; // select the material in the Inspector

To get these values from a hit object, do the following:

  ...
  if (Input.GetMouseButtonDown(0)){
    var hit: RaycastHit;
    var ray: Ray = Camera.main.ScreenPointToRay(Input.mousePosition);
    if (Physics.Raycast(ray, hit)){   // if some object hit...
      // try to get its Variables script:
      var values: Variables = hit.transform.GetComponent(Variables);
      if (values){   // if the object has the script Variables attached...
        var isVehicle: boolean = values.vehicle;   // read the variables
        var mat: Mat = values.myMat;
      } else {  // but if it doesn't have the script...
        isVehicle = false;  // assume the default values
        mat = Mat.Nothing;
      }
    }
  }
  ...