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This commit is contained in:
Alexey Milovidov 2020-05-23 14:03:21 +03:00
parent 146d8253ce
commit 3b7088262f
1 changed files with 3 additions and 2 deletions
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5
src/Functions/pointInPolygon.cpp
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@ -306,7 +306,8 @@ private:
*
* Basically it works like this:
* From the point, cast a horizontal ray to the right
* and count the number of intersections with polygon edges.
* and count the number of intersections with polygon edges
* (every edge is considered semi-closed, e.g. includes the first vertex and does not include the last)
*
* Advantages:
* - works regardless to the orientation;
@ -320,7 +321,7 @@ private:
*
* Why not to apply the same algorithm available in boost::geometry?
* It will require to move data from columns to temporary containers.
* Despite the fact that the boost library is template based and allows arbitrary containers,
* Despite the fact that the boost library is template based and allows arbitrary containers and points,
* it's diffucult to use without data movement because
* we use structure-of-arrays for coordinates instead of arrays-of-structures.
*/