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32 of the ? help pages checked against the code and corrected. Wrong claims fixed: Stitch Inpaint's empty-area check (20/255), what a new video keeps on both Video Crop + Rotate + Pad pages, Load Video's frame picker and player height, where Run Timer lists earlier runs, inpainting on the Krea 2 Outpaint Model Patch page, Workflow Note's banner layout and pack detection, Image Resize's pad bars and mask, Save Image's path preview and tags, Free Memory's steps, and Latent Size's sockets. Image Crop + Rotate + Pad now follows the node from top to bottom; the saved values no row shows moved under Technical details. Controls are named the way the node shows them, with the input name beside. Pages that opened with jargon now open with what the node does and when to use it. LoRA Loader gained the Civitai lookup, suggested strength and the gear options it did not name.
39 lines
1.8 KiB
Markdown
39 lines
1.8 KiB
Markdown
# Math Expression
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Does maths on up to three numbers. Type a formula that uses `a`, `b` and `c`
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and get the answer as a decimal number and as a whole number. Use it for
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width and height sums, strength ramps and frame counts.
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## Controls
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- **f(a, b, c)** (`expression`): The arithmetic to evaluate. Allowed:
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numbers, the names `a`/`b`/`c`, the operators `+ - * / // % **`,
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parentheses, unary minus, and the functions `min`, `max`, `abs`, `round`,
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`floor`, `ceil`, `sqrt`.
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Examples: `a * 2`, `floor(a / 64) * 64`, `min(a, b) + 0.5`,
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`sqrt(a*a + b*b)`. A new node starts with `a + b`. `min` and `max` take
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two or more values, and `round(a, 2)` keeps two decimals.
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- **a**, **b**, **c**: The values the expression reads, as three sockets on
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the node's left edge that take a `FLOAT` or an `INT`. An unwired one reads
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as `0`, and an unused one costs nothing; a constant belongs in the
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expression itself (`a * 2`, `floor(a / 64) * 64`).
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## Outputs
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- **float**: The result as a float.
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- **int**: The result rounded to the nearest whole number; halves round away
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from zero (`2.5` becomes `3`, `-2.5` becomes `-3`). `round()` inside the
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expression is different: it sends a half to the nearest even number, so
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`round(2.5)` is `2`.
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## Safety
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The expression is parsed with Python's `ast` module and walked against a
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whitelist — it is never passed to `eval`. Anything outside the grammar above
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(other names, attribute access, subscripts, strings, comparisons) stops the
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run with an error naming what to remove, so a workflow shared by someone else
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cannot smuggle code through this node. Division by zero and overflowing
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results are clear errors rather than a crash or an `inf` traveling
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downstream. So are the square root of a negative number and an empty
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expression. An expression can be up to 4096 characters long.
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