Module marching_squares 

Functions

extract_contours

Extract contour line segments from a regular grid at specified level thresholds. Returns vectors of (x, y, level, group_id) for each segment endpoint.

frac

Interpolation fraction for threshold crossing between v0 and v1.

lerp

Linear interpolation between two values.

marching_squares_segments

Return line segments for a marching squares cell. Corners: tl=top-left, tr=top-right, br=bottom-right, bl=bottom-left.