[postgis-tickets] [PostGIS] #2837: ST_Extrude unexpected GeometryType in extrude('Solid')

[PostGIS]

#2837: ST_Extrude unexpected GeometryType in extrude('Solid')
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 Reporter:  robe    |       Owner:  colivier     
     Type:  defect  |      Status:  new          
 Priority:  medium  |   Milestone:  PostGIS 2.2.0
Component:  sfcgal  |     Version:  trunk        
 Keywords:          |  
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Comment(by vmo):

 We cannot extrude solids in SFCGAL at the moment.

 I'm not sure I ever did that in CAD (which I used to use quite a lot), I'm
 not even sure if any CAD system will allow you to.

 I can imagine how to perform the operation:
     - split the solid along the line that defines the shadow figure of the
 solid on a plane normal to the extrusion direction
     - extrude this line
     - the result is the combination of this extrusion an the two halves of
 the solid

 Dealing with holes is a bit complicated though.

 I there a use-case ?

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2837#comment:2>
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