Descrizione

Availability: 3.5.0

Questo metodo richiede il backend SFCGAL.

Questo metodo implementa la specifica SQL/MM. SQL-MM IEC 13249-3: 8.1, 10.5

Questa funzione supporta il 3d e non distrugge gli z-index.

Questa funzione supporta le Polyhedral Surface.

Questa funzione supporta i Triangoli e le Triangulated Irregular Network Surfaces (TIN).

Esempi

Note: By default a PolyhedralSurface built from WKT is a surface geometry, not solid. It therefore has surface area. Once converted to a solid, no area.

SELECT CG_3DArea(geom) As cube_surface_area,
CG_3DArea(CG_MakeSolid(geom)) As solid_surface_area
FROM (SELECT 'POLYHEDRALSURFACE( ((0 0 0,0 0 1,0 1 1,0 1 0,0 0 0)),
((0 0 0,0 1 0,1 1 0,1 0 0,0 0 0)),
((0 0 0,1 0 0,1 0 1,0 0 1,0 0 0)),
((1 1 0,1 1 1,1 0 1,1 0 0,1 1 0)),
((0 1 0,0 1 1,1 1 1,1 1 0,0 1 0)),
((0 0 1,1 0 1,1 1 1,0 1 1,0 0 1)) )'::geometry) As f(geom);

cube_surface_area │ solid_surface_area
──────────────────┼────────────────────
6                 │ 0

Si veda anche

CG_Area, CG_MakeSolid, CG_IsSolid, CG_Area