Unit converter made for Garry's Mod.

ConvertToUnit.lua

UNIT = setmetatable({}, {
        __index = {
            KILOMETRE = 1;
            METER = 2;
            CENTIMETRE = 3;
            MILE = 3;
            INCH = 4;
            FOOT = 5;
        };
        __metatable = false;
        __newindex = function( self ) error( "Invalid operation. Attempt to modify '" .. tostring( self ) .. "' table." ) end;
        __tostring = function() return "UNIT" end;
    })

ConvertToUnit = function( units, unit, speed )
    assert( isnumber( units ) )
    assert( type( unit ) == tostring( UNIT ) )
    if ( unit == UNIT.KILOMETRE ) then
        if ( speed ) then
            return units * 1.905 / 100000 * 3600
        end
        return units * 1.905 / 100000
    end
    if ( unit == UNIT.METER ) then
        return units * 1.905 / 100
    end
    if ( unit == UNIT.CENTIMETRE ) then
        return units * 1.905
    end
    if ( unit == UNIT.MILE ) then
        if ( speed ) then
            return units * ( 1 / 16 ) / 5280 * 3600
        end
        return units * ( 1 / 16 ) / 5280
    end
    if ( unit == UNIT.INCH ) then
        return units * 0.75
    end
    if ( unit == UNIT.FOOT ) then
        return units * ( 1 / 16 )
    end
    return units
end