SFCGAL简介

SFCGAL is a C++ wrapper library around CGAL with the aim of supporting ISO 19107:2013 and OGC Simple Features Access 1.2 for 3D operations.

SFCGAL provides standard compliant geometry types and operations, that can be accessed from its C or C++ APIs. PostGIS uses the C API, to expose some SFCGAL's functions in spatial databases (cf. PostGIS manual).

Geometry coordinates have an exact rational number representation and can be either 2D or 3D. Among supported geometry types are :

• Points
• LineStrings
• Polygons
• TriangulatedSurfaces
• PolyhedralSurfaces
• GeometryCollections
• Solids

 

Supported operations include :

• WKT reading and writing with exact rational number representation for coordinates
• Intersection operations and predicates
• Convex hull computation
• Tessellation
• Extrusion
• Area and distance computation
• Minkovski sums
• Contour offsets
• Straight skeleton generations

参考：https://sfcgal.gitlab.io/SFCGAL/