CG_GenerateGableRoof
Prev  8.3. SFCGAL-Verarbeitung und Beziehungsfunktionen  Next

Name

CG_GenerateGableRoof — Generate a gable roof from a footprint polygon.

Synopsis

geometry CG_GenerateGableRoof(geometry geom, float8 height, float8 slope_angle);

Beschreibung

Generate a gable roof as a 3D PolyhedralSurface Z from a 2D footprint polygon. Two opposite sides are vertical gable ends; the other two sides slope to a horizontal ridge. height sets the ridge height above the ground (default 3.0) and slope_angle controls the pitch in degrees (default 30.0). The SRID of the input geometry is preserved.

Availability: 3.7.0 - requires SFCGAL >= 2.3.0.

Diese Methode benötigt ein SFCGAL-Backend.

Diese Funktion unterstützt polyedrische Flächen.

Beispiele

SELECT ST_CoordDim(
  CG_GenerateGableRoof(
    'POLYGON((0 0,5 0,5 4,0 4,0 0))',
    2.0, 30.0));
-- 3