ScriptoriumandClaude Opus 4.8
e2d94d71fe
Implement a linear-interpolation math node that maps an input value from an input range [in_min, in_max] onto an output range [out_min, out_max]. - node.py: SimpleLERP class (classic INPUT_TYPES/RETURN_TYPES pattern), float inputs for value and both ranges, plus a clamp toggle. Guards against a zero-width input range and supports inverted ranges. - __init__.py: export NODE_CLASS_MAPPINGS / NODE_DISPLAY_NAME_MAPPINGS for ComfyUI discovery. - README.md: usage, formula, and inputs/outputs tables. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
37 lines
1.6 KiB
Markdown
37 lines
1.6 KiB
Markdown
# comfyui-lerp-node
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A simple math node that performs linear interpolation between a base range and a mapped range.
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## SimpleLERP
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Maps an input `value` from an input range `[in_min, in_max]` onto an output range
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`[out_min, out_max]`:
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```
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t = (value - in_min) / (in_max - in_min)
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output = out_min + t * (out_max - out_min)
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```
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Found in the node browser under the **math** category as **Simple LERP**.
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### Inputs
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| Name | Type | Default | Description |
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|-----------|---------|---------|--------------------------------------------------------------------|
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| `value` | FLOAT | 0.0 | The value to map. |
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| `in_min` | FLOAT | 0.0 | Lower bound of the input range. |
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| `in_max` | FLOAT | 1.0 | Upper bound of the input range. |
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| `out_min` | FLOAT | 0.0 | Lower bound of the output range. |
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| `out_max` | FLOAT | 1.0 | Upper bound of the output range. |
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| `clamp` | BOOLEAN | False | If true, hold the result within the output range instead of extrapolating. |
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### Output
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| Name | Type | Description |
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|---------|-------|----------------------------|
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| `value` | FLOAT | The interpolated result. |
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Notes:
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- With `clamp` off, inputs outside `[in_min, in_max]` extrapolate beyond the output range.
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- Inverted ranges (e.g. `out_min > out_max`) are supported.
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- If `in_min == in_max`, the result is `out_min` (no division by zero).
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