[postgis-devel] Polyhedral Containment

[Paragon Corporation]

Oh forgot to mention – for current system, you'd have to use the ST_Extrude function (extrude a polygon up to a cube) and then it would automagically get treated as a solid.

 

 

 

From: postgis-devel-bounces at lists.osgeo.org [mailto:postgis-devel-bounces at lists.osgeo.org] On Behalf Of Paragon Corporation
Sent: Wednesday, February 25, 2015 3:45 PM
To: 'PostGIS Development Discussion'
Subject: Re: [postgis-devel] Polyhedral Containment

 

Paul,

With the new function that Vince is going to put in, it would handle this.

 

And would be something like

 

SELECT ST_3DIntersects( 

ST_MakeSolid( 'POLYHEDRALSURFACE( 

 ((0 0 0, 0 0 1, 0 1 1, 0 1 0, 0 0 0)),  

 ((0 0 0, 0 1 0, 1 1 0, 1 0 0, 0 0 0)), 

 ((0 0 0, 1 0 0, 1 0 1, 0 0 1, 0 0 0)), 

 ((1 1 0, 1 1 1, 1 0 1, 1 0 0, 1 1 0)),  

 ((0 1 0, 0 1 1, 1 1 1, 1 1 0, 0 1 0)),  

 ((0 0 1, 1 0 1, 1 1 1, 0 1 1, 0 0 1)) 

 )'::geometry), 'POINT(0.5 0.5 0.5)'::geometry);

 

Shame on you for not casting to geometry :)

 

See this note:

http://lists.osgeo.org/pipermail/postgis-devel/2015-January/024710.html

 

Hope that helps,

Regina

http://www.postgis.us

http://postgis.net

 

 

From: postgis-devel-bounces at lists.osgeo.org <mailto:postgis-devel-bounces at lists.osgeo.org>  [mailto:postgis-devel-bounces at lists.osgeo.org] On Behalf Of Paul Ramsey
Sent: Wednesday, February 25, 2015 3:03 PM
To: PostGIS Development Discussion
Subject: [postgis-devel] Polyhedral Containment

 

Is there a 3d function that can answer this question and return true? (volumetric containment?)

 

ST_3dIntersects(

 'POLYHEDRALSURFACE( 

 ((0 0 0, 0 0 1, 0 1 1, 0 1 0, 0 0 0)),  

 ((0 0 0, 0 1 0, 1 1 0, 1 0 0, 0 0 0)), 

 ((0 0 0, 1 0 0, 1 0 1, 0 0 1, 0 0 0)), 

 ((1 1 0, 1 1 1, 1 0 1, 1 0 0, 1 1 0)),  

 ((0 1 0, 0 1 1, 1 1 1, 1 1 0, 0 1 0)),  

 ((0 0 1, 1 0 1, 1 1 1, 0 1 1, 0 0 1)) 

 )', 'POINT(0.5 0.5 0.5)');

 

 

-- 
Paul Ramsey
http://cleverelephant.ca

http://postgis.net 

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