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Question by Andrea_Marchetti · May 18, 2017 at 06:17 PM · bugbug-perhapsif statementcondition

If conditions doesn't work?!?

I have no idea why this isn't working. Can someone help me? This is my function. The script is attached to a 2D sprite.

 function OnCollisionEnter2D ( collision : Collision2D )
 {
     var force : float = collision.relativeVelocity.magnitude / 20;
 
     if( force > 0.2f );
     {
         Debug.Log(force);
         GetComponent(AudioSource).volume = force;
         GetComponent(AudioSource).Play();
     }
 }

These are some of the debug values:

  • 0.006967617

  • 0.09649915

  • 0.05660962

  • 1.204138

  • etc... etc...

The condition is not respected and I have no clue why.

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avatar image Ahndrakhul · May 18, 2017 at 07:53 PM 0
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This is most likely happening because of the semicolon here if( force > 0.2f );. You probably just need to remove it.

avatar image Andrea_Marchetti Ahndrakhul · May 18, 2017 at 08:23 PM 0
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$$anonymous$$y goodness. Ahahah. Thanks. I have looked for a long time, anywhere but there. Why doesn't Unity give me an error? What does the compiler understand when there are braces without any statement or declaration? Just nothing or is it somehow useful?

avatar image Ahndrakhul Andrea_Marchetti · May 18, 2017 at 09:06 PM 0
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In this case, there isn't really an error to throw. Your code is being seen like this:

 if( force > 0.2f )
 {
     ; //empty statement does nothing
 }
 {
     Debug.Log(force);
     GetComponent(AudioSource).volume = force;
     GetComponent(AudioSource).Play();
 }//code block that is in its own scope.  It is not part of the if statement and will be run every time

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