Checks if an object is in view of a camera (Unity)

RendererExtensions.cs

using UnityEngine;

public static class RendererExtensions
{
	public static bool IsVisibleFrom( this Renderer renderer, Camera camera )
	{
		Plane[] planes = GeometryUtility.CalculateFrustumPlanes( camera );
		return GeometryUtility.TestPlanesAABB( planes, renderer.bounds );
	}
}