> ## Documentation Index
> Fetch the complete documentation index at: https://docs.comfy.org/llms.txt
> Use this file to discover all available pages before exploring further.

# CreateHookKeyframesFromFloats - ComfyUI Built-in Node Documentation

> Complete documentation for the CreateHookKeyframesFromFloats node in ComfyUI. Learn its inputs, outputs, parameters and usage.

> This documentation was AI-generated. If you find any errors or have suggestions for improvement, please feel free to contribute! [Edit on GitHub](https://github.com/Comfy-Org/embedded-docs/blob/main/comfyui_embedded_docs/docs/CreateHookKeyframesFromFloats/en.md)

This node creates hook keyframes from a list of floating-point strength values, distributing them evenly between specified start and end percentages. It generates a sequence of keyframes where each strength value is assigned to a specific percentage position in the animation timeline. The node can either create a new keyframe group or add to an existing one, with an option to print the generated keyframes for debugging purposes.

## Inputs

| Parameter         | Data Type       | Required | Range      | Description                                                                                               |
| ----------------- | --------------- | -------- | ---------- | --------------------------------------------------------------------------------------------------------- |
| `floats_strength` | FLOATS          | Yes      | -1 to ∞    | A single float value or list of float values representing strength values for the keyframes (default: -1) |
| `start_percent`   | FLOAT           | Yes      | 0.0 to 1.0 | The starting percentage position for the first keyframe in the timeline (default: 0.0)                    |
| `end_percent`     | FLOAT           | Yes      | 0.0 to 1.0 | The ending percentage position for the last keyframe in the timeline (default: 1.0)                       |
| `print_keyframes` | BOOLEAN         | Yes      | True/False | When enabled, prints the generated keyframe information to the console (default: False)                   |
| `prev_hook_kf`    | HOOK\_KEYFRAMES | No       | -          | An existing hook keyframe group to add the new keyframes to, or creates a new group if not provided       |

**Note:** The `floats_strength` parameter accepts either a single float value or an iterable list of floats. The keyframes are distributed linearly between `start_percent` and `end_percent` based on the number of strength values provided.

## Outputs

| Output Name | Data Type       | Description                                                                                                                 |
| ----------- | --------------- | --------------------------------------------------------------------------------------------------------------------------- |
| `HOOK_KF`   | HOOK\_KEYFRAMES | A hook keyframe group containing the newly created keyframes, either as a new group or appended to the input keyframe group |