ComfyUI utility nodes

A collection of miscellaneous nodes for ComfyUI

Nodes

MUSimpleWildcard

Expands wildcards, variables and functions.

Wildcards

Anything of the form $name$ will look up name.txt in $MU_WILDCARD_BASEDIR (defaults to wildcards under the current working directory) and randomly chooose one line from it as a replacement

Functions and variables

For example:

$z = realistic, photo
$foo($a, $b=sporty, $c=default thing) = { $c, $z, a $b $a  }
$foo(car, $c=another thing)

expands to another thing, realistic, photo, a sporty car

Variables can be defined inside functions and are local to the function

You can define multiple variables per line by separating them with ;

Note that variables and functions can be defined anywhere in the prompt, meaning that a $foo = bar will define $foo and expand into just a . This might cause weird behaviour if you want to do complicated things with MUJinjaRender.

"text" can be used to quote something when it would conflict with syntax, for example: $func("parameter, with comma", second parameter). If you need a " by itself, use "".

Default functions

There are some default functions available. put $help() in your prompt to see a list of available functions.

MUJinjaRender

You can use this node to evaluate a string as a Jinja2 template. Note, however, that because ComfyUI's frontend uses {} for syntax, There are the following modifications to Jinja syntax:

{% %} becomes <% %>
{{ }} becomes <= =>
{# #} becomes <# #>

Functions in Jinja templates

The following functions and constants are available:

pi
min, max, clamp(minimum, value, maximum),
abs, round, ceil, floor
sqrt sin, cos, tan, asin, acos, atan. These functions are rounded to two decimals

In addition, a special steps function exists.

The steps function will generate a list of steps for iterating.

You can call it either as steps(end), steps(end, step=0.1) or steps(start, end, step). step is an optional parameter that defaults to 0.1. It'll return steps inclusive of start and end as long as step doesn't go past the end. The second form is equivalent to steps(step, end, step). i.e. it starts at the first step.