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Add a note to arcTo docs about the 2PI drawing angle issue#183293

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AbdeMohlbi:issue_5766
Mar 9, 2026
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Add a note to arcTo docs about the 2PI drawing angle issue#183293
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AbdeMohlbi:issue_5766

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@AbdeMohlbi AbdeMohlbi commented Mar 6, 2026

Fixes: #5766

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@github-actions github-actions bot added the engine flutter/engine related. See also e: labels. label Mar 6, 2026
@AbdeMohlbi AbdeMohlbi marked this pull request as ready for review March 6, 2026 06:51
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This pull request adds a note to the arcTo method documentation, clarifying that it doesn't draw anything for sweep angles that are multiples of 2π and suggests addArc as a a workaround. My feedback includes a minor suggestion to improve the clarity of the new documentation note.

Comment on lines +3017 to +3020
/// current point and ends at the start of the arc. Note that this
/// method does not draw anything if the [sweepAngle] is a multiple
/// of $2\pi$ (e.g., $2\pi$, $4\pi$). If you need to draw a full
/// circle or an overlapping arc, use [addArc] as a workaround.
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medium

For better readability, you could clarify what $2\pi$ means and remove the redundant examples. This makes the note more concise and easier to understand for developers who might not be immediately familiar with radians.

  /// current point and ends at the start of the arc. Note that this
  /// method does not draw anything if the [sweepAngle] is a multiple
  /// of $2\pi$ radians (a full circle). If you need to draw a full
  /// circle or an overlapping arc, use [addArc] as a workaround.
References
  1. The style guide emphasizes optimizing for readability (line 29) and making documentation useful by explaining terms (lines 55-56). This suggestion improves clarity in line with these principles. (link)

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i think 2 PI is clear , i did add the symbols to make sure is appears different then normal text , that said this seems valid , let's wait for a review.

@AbdeMohlbi AbdeMohlbi changed the title Add a nore to arcTo about the 2PI drawing angle Add a note to arcTo docs about the 2PI drawing angle issue Mar 7, 2026
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lgtm, thanks

@gaaclarke gaaclarke added the autosubmit Merge PR when tree becomes green via auto submit App label Mar 9, 2026
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…#183293)

Fixes: flutter#5766

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Path.arcTo doesn't draw anything if its angles add up to a multiple of 2*PI

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