Name
CG_Extrude — Extrude a surface to a related volume
Synopsis
geometry CG_Extrude(geometry geom, float x, float y, float z);
Description
Availability: 3.5.0
This method needs SFCGAL backend.
This function supports 3d and will not drop the z-index.
This function supports Polyhedral surfaces.
This function supports Triangles and Triangulated Irregular Network Surfaces (TIN).
Examples
3D images were generated using PostGIS ST_AsX3D and rendering in HTML using X3Dom HTML Javascript rendering library.
SELECT ST_Buffer(ST_GeomFromText('POINT(100 90)'),
50, 'quad_segs=2'),0,0,30);
 Original octagon formed from buffering point |
CG_Extrude(ST_Buffer(ST_GeomFromText('POINT(100 90)'),
50, 'quad_segs=2'),0,0,30);
 Hexagon extruded 30 units along Z produces a PolyhedralSurfaceZ |
SELECT ST_GeomFromText('LINESTRING(50 50, 100 90, 95 150)')
 Original linestring |
SELECT CG_Extrude(
ST_GeomFromText('LINESTRING(50 50, 100 90, 95 150)'),0,0,10));
 LineString Extruded along Z produces a PolyhedralSurfaceZ |