CODEWITHSUNDEEP
c#unity-game-engine
Radu Pîrvu
Radu Pîrvu

Reputation: 61

How can I make a game over like funcrion that triggers when a variable reaches 0?

I tried to do something like

 public double number = 10000;
 public double decreasing = 10;

 public void Update()
 {
     number -= decreasing * Time.deltaTime;

     if (number == 0)
     {
         decreasing = 0;
     }
 }

but this doesn't work. How can I make it stop decreasing when it reaches 0?

Upvotes: 0

Views: 28

Answers (1)

Christopher
Christopher

Reputation: 9824

This is a double, a form of rather big floating point number. Floats are known for their inprecision. A exact match like number == 0 happens once in a blue moon. Even after setting it to a value, it is not guaranteed to be precisely that value. This is a inherent, unavoidbale property of floating point types: https://www.youtube.com/watch?v=PZRI1IfStY0

Either expect it from now on and use <= checks, or stop using float altogether. Some simple code like this:

if(number <= 0)
  number = 0;

will make sure that if it ever drops below 0, it will be seet back to 0. After this line, a exact match like number == 0 will be somewhat reliable. But my advice stands to just stop using a float altogether. A int where you display the last 3 digits as "decimal point" works way better here.

Upvotes: 2

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