CHECK if a GameObject HAS A COMPONENT assigned to it in Unity - Prevent Null Reference Exception
In this video we see how to check if a GameObject has a certain component assign to it in Unity, this allows us to execute certain actions only if a certain Component is present.
In this example we detect the collision between two spheres and a plane, one of the spheres has a Player scripts and the other an Enemy script, if the ball has a Player script we are going to the destroy it and if the ball has the Enemy script we are going to make it bounce.
Check if a GameObject has a component is also important to prevent the null reference exception, an error that happens if we try to use a variable that is null.
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