CG's custom nodes: Utilities

Index of my custom nodes

Utilities

To install:

cd [path to ComfyUI]/custom_nodes
git clone https://github.com/chrisgoringe/cg-utilities.git

A set of nodes that I find really helpful in making clean workflows. Several of these nodes make use of my core node code, which should be automatically installed when you first use the nodes (note that this may require ComfyUI to be restarted) if it isn't present.

utilities/conditioning

Two Clip Text Encode - one clip, two text strings, two conditioninings. For prompt and negative prompt.

Merge Conditionings - merge two conditionings based on a mask

utilities/conversion

To String|Int|Float - take any input and try to convert it into the appropriate type.

utilities/developer

Inspect - the simplest class of all time - takes any input, and does nothing. If you're a developer, put a breakpoint permanently at line 9 of utilitites_developer.py and use this node to look at anything.

Combo Pass - WIP. Suggest you don't use this.

utilities/images

Image Size - Get the size of an image

Resize Image - Constrained resize of an image. The initial size is the size of image_to_match, if that (optional) input is connected, else the size of image. There are three constraint modes:

• none - the image is scaled by factor, and then scaled down if the resulting height or width is greater than max_dimension (keeping the aspect ratio fixed).
• x8 - as for none, but the height and width are adjusted at the end to the nearest multiple of 8. Lots of nodes need an image to be a multiple of 8 pixels in each direction.
• cn512 - rescale to a ControlNet-compatible size. The image is rescaled to make the shorter dimension equal to 512, and the longer dimension a multiple of 64, while keeping the aspect ratio as close to the original as possible.

Once a final size has been determined, the image and image_to_match (if any) are both rescaled to the same size.

Combine Images - Combines up to four images (or lists of images) into a list of images.

Compare Images - Pixel-wise comparison of two images, outputting a greyscale image of the differences between them.

Mask Harden and Blur - Takes a mask and sets it to 1 or 0 based on a threshold, then blurs the edges. Useful for recombining images.

utilities/primitives

String|Int|Float - Primitive values

utilities/strings

Show Text - Take text input and display it in the UI.

Regex Substitution - Takes a string input and does a regex substitution on it, returning the result and the number of substitutions made. Uses python regex.sub() docs

Substitute - Takes a template and substitutes [X] and [Y] with the inputs, and %date% with DD-MM-YYYY

utilities/passthrough

Create a custom node based on any other node, with one or more of the inputs added as outputs. Look at passthrough_config.json for how do this (changes require a restart of ComfyUI and reload of the webpage) - the example below takes the VAE Encode For Inpaint node and adds an output, vae, which is a copy of the input of the same name. This can be useful for making workflows tidier! Note that widget inputs can be output - sometimes useful to reuse a seed, or use the name of a checkpoint or LoRA.

    "VAEEncodeForInpaintReturn" : {                             # a name unique in this file
        "display_name" : "VAE Encode For Inpaint Passthrough",  # The display name of the new custom node
        "based_on" : "VAEEncodeForInpaint",                     # The unique name of the node type you are basing it on
        "inputs_to_pass" : ["vae"],                             # A list of the names of the inputs to be added as outputs
        "category": null                                        # optionally, the custom node category (default is utilities/passthrough)
    },

Passthrough Info - shows the nodes that could be used for based_on

Acknowledgements

I learned a lot from reading pythongosssss' Custom Scripts, especially on how the javascript side of things works.