Having trouble with getcomponentsinchildren.

Question

Having a bit of trouble with using GetComponentsInChildren.

 private Material[] cachecolours;
 
 void Start ()
     {
        //...
 
         cachecolours = transform.GetComponentsInChildren<Material>();
     }
 void Update ()
     {
             foreach (Material colour in cachecolours)
             {
                 colour.color = new Color(cs, cs, cs);
             }
     }

I want to change the colour of the materials of each child of my object but I keep getting these errors:

ArgumentException: GetComponent requires that the requested component 'Material' derives from MonoBehaviour or Component or is an interface.

and

NullReferenceException: Object reference not set to an instance of an object

I believe the second is due to the first but I can't figure out how to change the colour of each child in turn.

cs is assigned a float value I just excluded that part of the code.

Answer 1

Best Answer

Answer by gjf · Sep 26, 2016 at 07:26 PM

"In order to get the material used by an object, use the Renderer.material property."

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Yutang13 · Sep 26, 2016 at 07:36 PM 0

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Could you explain a bit better please. I've tried everything I could think of and couldn't get it to work. GetComponenentsInChildren seems to give a Component[] output but I want Material[]

IIRC changing the variable to type Component[] and getting the component then doesn't allow me to get the material.color I need.

gjf Yutang13 · Sep 26, 2016 at 07:49 PM 1

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Material isn't a component - Renderer is. get the Renderer component then iterate thru those setting the color as required... something like (not tested)

 private Renderer[] _cacheRenderers;
  
  void Start ()
      {
         //...
  
          _cacheRenderers = transform.GetComponentsInChildren<Renderer>();
      }
  void Update ()
      {
              foreach (var renderer in _cacheRenderers)
              {
                  renderer.material.color = new Color(cs, cs, cs);
              }
      }

Yutang13 gjf · Sep 26, 2016 at 07:52 PM 0

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Ok thanks, I'll try it out tomorrow and let you know if I get it working :)

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Having trouble with getcomponentsinchildren.

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