Use this when you want to find the ridge lines and spine of a footprint or lot within a flow, for example to lay out a roof, a central corridor, or a road down the middle of a site.
A straight skeleton is the set of lines you get when a shape shrinks evenly from all sides. As the edges move inward, they meet and form new corners, creating a branching structure inside the shape. The result is a network of connected lines that shows how the shape collapses in on itself.
Inputs
Name | Abbreviation | Type | Access | Description |
Feature | F | Cartesian | Item | The polygon to get the straight skeleton for |
Outputs
Name | Abbreviation | Type | Access | Description |
Ridge | R | Cartesian | List | The ridges of the straight skeleton |
Extended Ridge | eR | Cartesian | List | The ridges, extended out to the edge of the polygon |
Hips | H | Cartesian | List | The hips and valleys of the straight skeleton |
How to
Connect a closed polygon geometry, for example from Read Feature, to the Feature input.
Use the outputs. Ridge gives the center spine, Extended Ridge runs the spine out to the edge, and Hips gives the lines from the spine to each corner. A multipolygon returns the lines for every part.
Combine Straight Skeleton with other nodes to build on the spine.
Straight Skeleton with Apartment:
Straight Skeleton with Skeleton Editor:
