MSFS Mission Script - Calculator

Applicable
MSFS2024
MSFS2020
MS Flight
LM P3D5
LM P3D4
LM P3D3
LM P3D2
LM P3D
FS World
FSXSE
FSXA
FSX
FS2004
FS2002
XP11
XP10
XP9

You can use calculators for more advanced logic in your mission. It can take in multiple variables and trigger different actions based on a logic. You can also use this to calculate a mission score and probably many more applications which you can think of. See MSFS Mission Script for general information about creating a mission script.

Calculator object

A calculator has four main parts:

CalculatorFormula	CalculatorFormulas are the most important part of the calculator. They are written in Reverse Polish Notation and can be used as a condition (same as in a PropertyTrigger) or as an action (same as in a ExecuteRPNAction) or both at the same time.
CalculatorValue	A calculator has a CalculatorValue that can be used by objects that use RPN. This value is determined by the main CalculatorFormula, StartValue, OnActivatedValue, and OnDeactivatedValue.
CalculatorParameters	A calculator can have parameters, which are Calculator Variables that can be used in CalculatorFormulas. See: the list of parameter types.
CalculatorActions	A calculator can have associated actions that execute when the calculator is activated, deactivated, or when a condition has been met.

Calculator parameters / variables

You can create a Calculator Variable by adding a CalculatorParameter to a calculator. In NameInFormula you give the variable a name. You can later reference the Calculator Variable using (X:VariableName) or [VariableName].

List of parameter types

ReferenceParameter	You can use another Calculator's CalculatorValue as a parameter.
FormulaParameter	You can use RPN code as a reference. Which means you can use all variables such as SimVars and Calculator Variables.
InputParameter	You can use a user input as a parameter.
RunwayParameter	You can add data relating to runways as a parameter.
PathParameter	You can add data relating to paths as a parameter.
MouseParameter	You can add the position of the mouse as a parameter.
RacerParameter	You can add data relating to players in a race as a parameter.

Calculator Actions

DeactivateAfterExecution	Deactivate the entire calculator after execution.
CalculatorFormula	If this formula is true, the actions will execute.
NameInFormula	This CalculatorFormula can also be referenced.
StartValue	Starting value of the CalculatorFormula.
On(De)ActivatedValue	What the value will change to when the calculator is activated.
OnActionCompleteFormula	Formula to execute when all the actions have finished.
Actions	Actions that execute when the CalculatorFormula is true.