[postgis-tickets] [PostGIS] #3117: Add support for SFCGAL 1.1

[PostGIS]

#3117: Add support for SFCGAL 1.1
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  Reporter:  vmo          |      Owner:  colivier
      Type:  enhancement  |     Status:  new
  Priority:  medium       |  Milestone:  PostGIS 2.2.0
 Component:  sfcgal       |    Version:  2.1.x
Resolution:               |   Keywords:
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Comment (by vmo):

 Here is a summary of the attached patch.

 In doc/reference_sfcgal.xml
 - added doc for ST_3DDifference, ST_3DUnion, ST_Volume
 - added doc for ST_MakeSolid and ST_IsSolid that are pure postgis
 functions to set/get the solid flag

 In postgis/lwgeom_backend_api.c
 - added backend switch for difference and union

 In postgis/lwgeom_geos.h and postgis/lwgeom_geos.c
 - changed the name of difference and union
 - exposed those renamed functions

 In postgis/lwgeom_sfcgal.c
 - added difference, union, volume
 - added makesolid and issolid

 In postgis/sfcgal.sql.in
 - added ST_3DDifference, ST_3DUnion and ST_Volume
 - added ST_MakeSolid and ST_IsSolid

 In regress/sfcgal/concave_hull.sql
 - fixed test failure caused by insufficient tolerance

 In regress/sfcgal/empty.sql, regress/sfcgal/empty_expected,
 regress/sfcgal/regress_ogc.sql and regress/sfcgal/regress_ogc_expected
 - fixed test to avoid failure on equivalent representation of a polygon
 (different starting point for a ring)

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3117#comment:1>
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