wm

Wang–Müller line generalization algorithm in PostGIS
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commit 56c92b71d90f270b58cee50bd7a422de43d4ac49 (tree)
parent b6b97852bb913f02928abc7a1c4b470eaa5faecc
Author: Motiejus Jakštys <motiejus@jakstys.lt>
Date:   Wed, 19 May 2021 22:57:47 +0300

remove redundant commentary

Diffstat:
Mwm.sql | 10----------
1 file changed, 0 insertions(+), 10 deletions(-)

diff --git a/wm.sql b/wm.sql @@ -261,11 +261,6 @@ begin -- self-crossing. now try to find another bend in this line that -- crosses an imaginary line of end-vertices - -- To understand the block below, I suggest you take a pencil and paper, - -- draw a self-crossing bend (fig6 from the article works well), and - -- figure out what happens here, by hand. I know it's hard to follow. - -- Apologies. - -- go through each bend in the given line, and see if has a potential to -- cross bends[i]. for j in 1..i-1 loop @@ -291,14 +286,9 @@ begin continue when multi is null; mutated = true; - -- To understand the block below, I suggest you take a pencil and paper, - -- draw a self-crossing bend (fig6 from the article works well), and - -- figure out what happens here, by hand. I know it's hard to follow. - -- Apologies. -- remove last vertex of the previous bend, because the last -- segment is duplicated with the i'th bend. bends[i-1] = st_removepoint(bends[i-1], st_npoints(bends[i-1])-1); - -- continue debugging the selfcrossing-1 here. bends[i] = st_makeline( st_pointn(bends[i], 1), st_removepoint(st_geometryn(multi, st_numgeometries(multi)), 0)