Sky Exposure - [source code]
Computes the Sky View Factor (SVF) for each input point using the Tregenza 145-patch sky subdivision. Casts 145 rays toward the upper hemisphere and returns the fraction of unobstructed sky directions (0 = fully obstructed, 1 = fully open sky).
Input
| Name | Nickname | Description |
|---|---|---|
| Positions | List of 3D points at which sky exposure is computed. Rays are cast from the Offset height above each input point; use ground-surface points directly. | |
| Context | Obstructing geometry for ray intersection (buildings, trees, walls). Accepts Mesh, Brep, or Surface. The ground surface need not be included. | |
| Offset | Vertical offset (m) above each point from which rays are cast. Default 0.918 m. |
Output
| Name | Nickname | Description |
|---|---|---|
| SkyExp | Sky exposure per point. Range 0.0 (fully obstructed) to 1.0 (fully open sky). |