Description

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.

Disponibilité : 3.5.0

Cette méthode nécessite le backend SFCGAL.

Cette fonction prend en charge la 3D et ne supprime pas l'indice z.

Cette fonction prend en charge les surfaces Polyhedral.

Cette fonction prend en charge les triangles et les réseaux irréguliers triangulés (TIN).

Exemples

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