sec_interp.core.utils.geometry_utils.processing module

Geometry processing utilities (pure math).

sec_interp.core.utils.geometry_utils.processing.MAX_DENSIFY_POINTS = 50000

Hard cap on generated vertices to prevent pathological densification. # no-i18n

A tiny interval relative to the polyline extent (a common symptom of mixing a DEM pixel size expressed in a different CRS than the section line) would otherwise allocate millions of vertices and freeze the application.

sec_interp.core.utils.geometry_utils.processing.densify_line_points(points: list[tuple[float, float]], interval: float) → list[tuple[float, float]]

Densify a polyline by inserting intermediate vertices.

Ensures no segment is longer than interval. Returns the input unchanged if it has fewer than two points or the interval is non-positive. The number of inserted vertices is capped at MAX_DENSIFY_POINTS; the interval is grown if needed to honour the cap.

Parameters:

  • points – List of (x, y) tuples.

  • interval – Maximum segment length (in the same units as the points).

Returns:

Densified list of (x, y) tuples.

sec_interp.core.utils.geometry_utils.processing.interpolate_segment_points(dist_start: float, dist_end: float, master_grid_dists: list[tuple[float, Any, float]], master_profile_data: list[tuple[float, float]], tolerance: float) → list[tuple[float, float]]

Convert boundary distances into a list of points with sampled elevations.

Includes the start/end points and any intermediate grid points from the master profile that fall within the specified distance range.

Parameters:

  • dist_start – Start distance along section.

  • dist_end – End distance along section.

  • master_grid_dists – Full grid of coordinates and elevations.

  • master_profile_data – Topography profile (dist, elevation).

  • tolerance – Distance tolerance for grid inclusions.

Returns:

List of (distance, elevation) tuples defining the segment profile.