Spatiotemporal relationships

tContains({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer}) → tbool
tCovers({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer}) → tbool
tDisjoint({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer}) → tbool
tDwithin({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer},float) → tbool
tIntersects({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer}) → tbool
tTouches({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer}) → tbool

The temporal relationships compute the topological or distance relationship at each instant and result in a tbool. A circular buffer covers an area, so every relationship is declared in both directions and between two temporal circular buffers, which is what distinguishes this family from the moving-point ones.

SELECT tDisjoint(geometry 'Polygon((0 0,0 50,50 50,50 0,0 0))',
  tcbuffer '[Cbuffer(Point(1 1), 0.1)@2001-01-01, Cbuffer(Point(1 1), 0.3)@2001-01-03)');
-- {[t@2001-01-01, t@2001-01-03)}
SELECT tDwithin(tcbuffer '[Cbuffer(Point(1 1), 0.3)@2001-01-01, 
  Cbuffer(Point(1 1), 0.5)@2001-01-03)', tcbuffer '[Cbuffer(Point(1 1), 0.5)@2001-01-01, 
  Cbuffer(Point(1 1), 0.3)@2001-01-03)', 1);
/* {[t@2001-01-01, t@2001-01-01 22:35:55.379053],
   (f@2001-01-01 22:35:55.379053, t@2001-01-02 01:24:04.620946, t@2001-01-03)} */