Descrizione

Returns true when the input carries the solid flag, such as a geometry produced by CG_MakeSolid. A closed PolyhedralSurface remains a surface until it is explicitly converted. This tests the representation, not shell closure or validity; no validity check is performed.

Availability: 3.5.0

Questo metodo richiede il backend SFCGAL.

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

Compare the same closed shell before and after converting it to a solid.

WITH data AS (
  SELECT 'POLYHEDRALSURFACE Z (
    ((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 geom
)
SELECT CG_IsSolid(geom) AS shell_is_solid,
       CG_IsSolid(CG_MakeSolid(geom)) AS solid_is_solid
FROM data;

f | t

Figure