A common error in LUA is using a single equal sign.
See APIReference for a complete list of PICO-8 built-in functions. If there are any syntax errors, it will not be able to execute the code, and inform you about the errors. See Math for a description of the PICO-8 mathematical functions. PICO-8 does not include the Lua standard library. See Cutscenes and Coroutines for a complete description and example of using coroutines for driving animations. See cocreate(), coresume(), costatus(), and yield(). PICO-8 supports coroutines using built-in global functions instead of Lua's coroutine library. The caller can then resume the coroutine as many times as needed until the function exits. See setmetatable() for more information, links to references, and a more complete example.Ī coroutine is a special kind of function that can yield control back to the caller without completely exiting. It does not support any other related Lua functions. PICO-8 supports the setmetatable(), getmetatable(), rawset(), rawget(), rawlen(), and rawequals() built-ins. For example, if I say 'it is not true that every man is tall' this is not the same as saying 'it is true that every man is not tall.' Instead 'it is not true that every man is tall' is equivalent to saying 'there is a man who is not. Sequences, indexed from 1: x = setmetatable ( o, self ) self. If P ( x) is a statement about x then x P ( x) is equivalent to x P ( x), not x P ( x).String literals can use single quotes ( 'hello') or double quotes ( "hello"), and the quote character can appear in the string escaped with a leading backslash ( "you said \"hello\", yes?").calculating the distance between corners of the screen requires calculating 128*128+128*128, which will overflow and wrap to -32768. Be aware of situations where you might overflow, e.g. This range is narrow in comparison to modern platforms.It also means that the tiniest negative fraction below 0 displays as the somewhat-unintuitive -0. This has the side effect that the maximum number rounds up to 32768.0, which is actually not a valid PICO-8 number. PICO-8 prints and converts numbers to decimal strings by rounding off to four decimal places.Numbers, in the range supported by signed 16.16 bit fixed point:.There are more notes on the implications of this at the end of this page. Anything that is not false (either nil or false) is true. In Lua both nil and the boolean value false represent false in a logical expression. PICO-8 supports these fundamental types of values: Lua provides the logical operators and, or and not.
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