Opened 3 months ago

Last modified 3 months ago

#1568 new enhancement

implement polygon clipping

Reported by: bbell Owned by: bbell
Priority: major Milestone: 9.5
Component: qlparser Version: development
Keywords: polygon, clipping Cc: dmisev, vmerticariu, pbaumann
Complexity: Hard

Description (last modified by dmisev)

following the work performed in D399, one should implement the polygon clipping methods in 2-D and 3-D and make any obvious improvements possible to the existing code (in particular, this means reducing present code redundancy).

system tests should be developed for polygon clipping in the following cases:

2D -- convex, concave, self-intersecting, vertex revisited, collinear
3D -- ", not coplanar

and exceptions should be thrown where the queries are not working/implemented.

Furthermore, it's worth thinking about how polygons are specified in rasql. Currently, D399 implements a simple representation of [x1,y1,x2,y2,x3,y3] (x/y[/z] coordinates of each polygon vertex are enumerated as one long list). Instead we could adopt WKT syntax, e.g. POLYGON ((x1 y1, x2 y2, x3 y3)), or something else more appropriate.

Change History (4)

comment:1 Changed 3 months ago by bbell

  • Description modified (diff)

comment:2 Changed 3 months ago by dmisev

  • Description modified (diff)
  • Milestone changed from 10.0 to 9.5

comment:3 Changed 3 months ago by dmisev

  • Cc pbaumann added

comment:4 Changed 3 months ago by dmisev

  • Description modified (diff)
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