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openscad If statement issue with variable

I have a problem with If statement in OpenScad. I have 4 variables

a=20;
b=14;
w=1;
c=16;

I want to check witch number is bigger a or b. And after depending who is smaller to take the value of smaller variable(in our case b < a) and to make a simple operation with c variable ( c=b-w).

I tried like this but it doesn't work.

a=20;
b=14;
w=1;
c=16;
if(a>b)
{
    c=b-w;
}

if (a<b)
{
c=a-w;
}

if (a==b)
{
c=a-w;
}

It seems logic, but in openscad as I understood you can't change the value of variable inside a If statement. What trick can I use in order to get my goal. Thank you!

Solution

  • OpenSCAD's variable assignment is different. You can only assign variables inside a bracket. So c = b - w will only be assigned inside the if bracket. Outside if this bracket it will still be 16. Don't ask me why. You can read more in the Documentation of OpenSCAD.