# Animation Exposure Sheet

> Turn drawing holds into a precise animation timing sheet. Enter how many timeline ticks each drawing lasts and a frame rate. Calculate drawing start times, total duration and GIF timing rounded to 10 milliseconds.

Part of usefulweb.app (https://usefulweb.app/). Results are deterministic calculations from the inputs and the listed assumptions; the API returns exactly what the web page shows.

## Use it
- Human interface: https://fliplineexposuresheet.usefulweb.app/ (interactive tool at https://fliplineexposuresheet.usefulweb.app/tool)
- JSON API: POST https://fliplineexposuresheet.usefulweb.app/api/v1/calculate with a JSON object of inputs (schema: https://fliplineexposuresheet.usefulweb.app/api/v1/tool)
- OpenAPI: https://fliplineexposuresheet.usefulweb.app/openapi.json
- MCP (Streamable HTTP): https://fliplineexposuresheet.usefulweb.app/mcp - tool `flipline_exposure_sheet`

## Inputs
- holds (text): Drawing holds (ticks, separated by commas)
- fps (integer): Timeline frame rate (FPS)

## Method
- A drawing held for N ticks lasts N × 1000 / FPS milliseconds. Start and end tick positions are half-open intervals.
- GIF stores centiseconds. Each drawing duration rounds independently to the nearest 10 ms; the reported GIF total may differ from ideal playback.
- 1–24 drawings, holds of 1–10 ticks and 1–30 FPS. No uploaded files are needed.