Check If GameObject Has Render Component

Questions & Answers
1

Hi,

I’m trying to turn off all my renderers on my object, and all their child’s. So what I’m doing is getting all the components in the gameObect in a for loop and using a renderer.enabled = false. But sometimes the game object might not have an renderer, and it will throw an error.

How would I do an if statement to check firstly if it has a renderer, then shut it off:

var components = GetComponents(Component);
for(var c : Component in components){
   if(Renderer)
       c.renderer.enabled = false;
}
2

You’re close.

It doesn’t really make sense to get all of the components, if you’re just looking for renderers – a renderer is a component.

You could do something like this:

for ( var r : Renderer in GetComponents(Renderer) )
{
    r.enabled = false;
}

This can potentially cause a compiler warning about implicit downcasts, which you can avoid by adding #pragma downcast to your script, or treating r as a Component which you always cast to a Renderer.

If you want to search an entire GameObject and its children, you could use GetComponentsInChildren() instead.

3

In Unity, testing the reference to a component or game object returns true when the component exists, and false if not:

var components = GetComponents(Component);
for(var c : Component in components){
   if(c.renderer)
       c.renderer.enabled = false;
}