evaluate is mathematical evaluator for Lua.
Features:
- Supports variables
- Support constants like pi
- Supports standard mathematical operators
- Functions with a variable number of arguments like min
- Supports unary operators, e.g. -2 or +2
local evaluate = require(...)
-- Simple expression without variables.
evaluate("1 + 1 / 3") -- 1.3333333333333
-- A more complex expression showing support for unary operators.
evaluate("(3.4 + -4.1)/2") -- -0.35
-- Expression using functions and variables.
evaluate("sqrt(a^2 + b^2)", {
a = 2.4;
b = 9.253;
}) -- 9.5591845363504
-- Expression with constant.
evaluate("pi * 2") -- 6.2831853071796
-- Expression using composite function calls and constant.
evaluate("sin(cos(pi)))") -- -0.8414709848079
-- Expression using function with variable parameters.
evaluate("max(2, 4, 7, 1)") -- 7
| Operator |
Description |
| + |
Addition operator / Unary plus |
| - |
Subtraction operator / Unary minus |
| * |
Multiplication operator |
| / |
Division operator |
| % |
Modulo operator |
| ^ |
Power operator |
| Function |
| abs |
| acos |
| asin |
| atan |
| atan2 |
| ceil |
| clamp |
| cos |
| cosh |
| deg |
| exp |
| floor |
| fmod |
| ldexp |
| log |
| max |
| min |
| noise |
| pow |
| rad |
| random |
| sign |
| sin |
| sinh |
| sqrt |
| tan |
| tanh |