Function offset_polygon_miter 

pub fn offset_polygon_miter(
    polygon: &[(f64, f64)],
    distance: f64,
    miter_limit: f64,
) -> Vec<Vec<(f64, f64)>>

Offsets a simple polygon by distance with a configurable miter limit.

The miter limit controls how far a miter join can extend relative to the offset distance. When the miter ratio at a vertex exceeds miter_limit, a bevel join is inserted instead, preventing long spikes at acute angles.

Arguments

• polygon - A simple polygon as a slice of (f64, f64) vertices
• distance - Offset distance (positive = outward, negative = inward)
• miter_limit - Maximum miter ratio before switching to bevel

Returns

Vec of polygon rings. May be empty, single, or multiple rings.