Could you please explain what this means? (C# ?)

[Kmeld 0]

Hi,

I tried to read this but I must say I am still unable to fully understand what exactly and how it does.

Could someone please explain in descriptive way how this variable definition works?

float num = (distanceMultiplier == 0f) ? 0f : (0.01f / distanceMultiplier);

I know it defines a float variable num and it is somehow dependent on the value of distanceMulitiplier abut I am (so far) not able to resolve this definition.

 

Also if anyone can explain what "distanceMultiplier" is used for in Cities Skylines code this would make it more easy for me.

Cris.

[rivit 3,402]

This is a conditional expression

written another way

     if the distance multiplier = 0  then

       make num=0

     else

       make   num = 0.01/DistanceMultiplier

      end if

this is done to prevent a divide by zero exception on DistanceMultiplier which should be non-zero to mean anything. I presume distance multiplier is just something used to scale some distance for rendering something 

[Kmeld 0]

Thanks,

what does " ?" stands for?

is it something like "reverse notation" of "if"

and " : " stands for "else".

 

 

 

[rivit 3,402]

yes its just a shortcut way to express a conditional assignment as a one liner 

? is more or less if this is true      and the : is more or less else

 A = (B==0) ? C : D;

is  if B=0 is true then A=C else A=D