Math Expressions

The Evaluate Math Expression and If Math Expression events as well as any events supporting Script Values allow mathematical expressions to be used for performing calculations.

If Math Expression

Expression

e.g. $health >= 0...

True

Add Event

Else

False

Add Event

Expressions allow you to use many mathematical operations such as:

You are also able to use the following functions:

min(a, b) return the minimum of two values a and b
max(a, b) return the maximum of two values a and b
abs(a) return the absolute value of a
atan2(a, b) return the 2-argument arctangent of a and b
isqrt(a) return the square root of a rounded down to nearest integer
rnd(a) return a random number greater than 0 and less than a
arr(a, b) return the value on index b for the array with number a, first array has value of a = 1

When you want to combine multiple conditions in your code, you can use boolean logic operators:

|| or: This operator is used when you want to check if at least one of the conditions is true.
For example, if you write $Local0 == 0 || $Local1 == 0, it means "if either variable Local0 equals 0 or variable Local1 equals 0".
&& and: This operator is used when you want to check if all conditions are true. For example, if you write $Local0 == 0 && $Local1 == 0, it means "if both variable Local0 equals 0 and variable Local1 equals 0".
! not: This operator is used when you want to invert the truth value of a condition.
For example, if you write !($Local0 == 0), it means "if variable Local0 does not equal 0".

You can use variables in expressions by typing $ and searching for the variable's name.

You can also use global values in expressions by typing # and searching for the global value's name.

tip

Don't forget the variable access $ nor the global value access #.