Math Expressions

Math expressions allow for mathematical calculations using constants, scoped variables and mathematical functions.
Using math expressions is expected to be more performant than using temporary variables for calculations.

All math expressions are based on fixed point arithmetic. For boolean operations, 0.0 is considered false and any
other value is considered true. All operators that return a boolean value will return 1.0 for true and 0.0 for false.

A list of math functions can be found [here](script_math_functions.md).

### Syntax
Math expressions use a base value (`value = ...`) that is then modified by sequential statements.
Statements can either be:
* No argument statement (e.g. `round = yes`) that simply applies an operation to the accumulator.
* Simple statements that takes one or more math expression as argument (e.g. `add = 5`, `clamp = { min = 0 max = 100 }`).
* Control flow statements that take a block of statements as argument (e.g. `if = { limit = { value = x  greater_than = 10 }  add = 100 }`).
* Collection iterators that takes a named collection and a block of modification statements to apply for each element. The collection elements will be scoped to.

### Error Handling
If a math expression fails to parse properly, it will be replaced with the value 0.0 for runtime operations.

### Examples

add = num_motorized

add = num_mechanized

greater_than = { value = num_units  multiply = 0.4 }