Math Input

Overview

A Math Input combines two inputs with a single maths or bitwise operation and reports the result as a new input. Despite the name it can divide, multiply, add, subtract, or do bitwise AND / OR / XOR. Use it to derive a value — a ratio, a sum, a difference — from two existing channels.

Prerequisites & hardware

You need:

  • A first operand input (the dividend) — referenced by alias.
  • A second operand input (the divider) — referenced by alias.

Either operand can point at a Constant Value Input if one side is a fixed number.

Add it in the app

  1. Add a new input and choose Math / Divide Input as the type.
  2. Choose the two source inputs.
  3. Give it a clear alias (e.g. Gear Ratio).
  4. Pick the operation, set the multiplier, and set the infinity value.

Settings reference

Setting Meaning Unit Range / values Notes
First operand The first input (the dividend in a divide) — an existing input (by alias) Left-hand side of the operation.
Second operand The second input (the divider in a divide) — an existing input (by alias) Right-hand side of the operation.
Operation The maths/bitwise operation applied — Divide, Multiply, Add, Subtract, And, Or, Xor And / Or / Xor are bitwise, not logical.
Multiplier The result is multiplied by this — sint32 Use it to keep integer precision — e.g. 100 to express a ratio as hundredths. Set 1 for no scaling.
Infinity value Value returned instead of dividing by zero result's unit sint32 Used when the second operand is 0 in a Divide. Guards against divide-by-zero.

Formula: the result is (first OP second) * multiplier. For example with Divide and a multiplier of 100, dividing 3000 by 1500 reports 200 (i.e. 2.00).

Common settings

Math / Divide Input also uses the shared setting — alias. See Common IO Settings.

Example — engine-to-output speed ratio

  1. Type Math / Divide Input, alias Speed Ratio.
  2. First operand = Engine Speed, Second operand = Output Speed.
  3. Operation Divide.
  4. Multiplier 100 so the ratio is reported in hundredths (2.50 reads as 250).
  5. Infinity value 0 so a stationary output (divider = 0) reports 0 instead of faulting.

Troubleshooting

  • Result is always the infinity value: the second operand is 0 (or near it) in a divide — check that source input.
  • Result looks rounded / always whole: these are integer maths; raise the multiplier (e.g. *100) to keep fractional precision.
  • And / Or / Xor gives odd numbers: remember they operate bit by bit, not as true/false — use a Compare Input for logical conditions.