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fix bug in final line merging

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Motiejus Jakštys 2021-03-25 12:01:43 +02:00
parent 6e5f66ee6b
commit e56932395d
2 changed files with 22 additions and 20 deletions
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2
IV/tests.sql
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@ -53,7 +53,7 @@ insert into demo_selfcrossing3 select name, generate_subscripts(ways, 1), unnest
-- COMBINED -- COMBINED
insert into figures (name, way) values ('multi-island',ST_GeomFromText('MULTILINESTRING((-15 10,-10 10,-5 11,0 11,5 11,10 10,11 9,13 10,15 9),(-5 11,-1 15,0 16,1 15,5 11))')); insert into figures (name, way) values ('multi-island',ST_GeomFromText('MULTILINESTRING((-15 10,-10 10,-5 11,0 11,5 11,10 10,11 9,13 10,15 9),(-5 11,-2 15,0 16,2 15,5 11))'));
drop table if exists demo_wm; drop table if exists demo_wm;
create table demo_wm (name text, i bigint, way geometry); create table demo_wm (name text, i bigint, way geometry);
insert into demo_wm (name, way) select name, ST_SimplifyWM(way, true) from figures where name='multi-island'; insert into demo_wm (name, way) select name, ST_SimplifyWM(way, true) from figures where name='multi-island';

40
IV/wm.sql
View File

@ -273,6 +273,7 @@ drop function if exists ST_SimplifyWM;
create function ST_SimplifyWM(geom geometry, dbg boolean default false) returns geometry as $$ create function ST_SimplifyWM(geom geometry, dbg boolean default false) returns geometry as $$
declare declare
dbg_stage integer; dbg_stage integer;
i integer;
line geometry; line geometry;
lines geometry[]; lines geometry[];
bends geometry[]; bends geometry[];
@ -290,26 +291,26 @@ begin
if dbg then if dbg then
drop table if exists debug_wm; drop table if exists debug_wm;
create table debug_wm(name text, i bigint, way geometry); create table debug_wm(name text, way geometry);
end if; end if;
dbg_stage = 1; for i in 1..array_length(lines, 1) loop
foreach line in array lines loop
mutated = true; mutated = true;
dbg_stage = 1;
while mutated loop while mutated loop
if dbg then if dbg then
insert into debug_wm (name, way) values( insert into debug_wm (name, way) values(
dbg_stage || 'afigures', dbg_stage || 'afigures_' || i,
line lines[i]
); );
end if; end if;
bends = detect_bends(line); bends = detect_bends(lines[i]);
if dbg then if dbg then
insert into debug_wm(name, i, way) values( insert into debug_wm(name, way) values(
dbg_stage || 'bbends', dbg_stage || 'bbends_' || i || '_' || generate_subscripts(bends, 1),
generate_subscripts(bends, 1),
unnest(bends) unnest(bends)
); );
end if; end if;
@ -317,9 +318,8 @@ begin
bends = fix_gentle_inflections(bends); bends = fix_gentle_inflections(bends);
if dbg then if dbg then
insert into debug_wm(name, i, way) values( insert into debug_wm(name, way) values(
dbg_stage || 'cinflections', dbg_stage || 'cinflections' || i || '_' || generate_subscripts(bends, 1),
generate_subscripts(bends, 1),
unnest(bends) unnest(bends)
); );
end if; end if;
@ -327,22 +327,24 @@ begin
select * from self_crossing(bends) into bends, mutated; select * from self_crossing(bends) into bends, mutated;
if dbg then if dbg then
insert into debug_wm(name, i, way) values( insert into debug_wm(name, way) values(
dbg_stage || 'dcrossings', dbg_stage || 'dcrossings' || i || '_' || generate_subscripts(bends, 1),
generate_subscripts(bends, 1),
unnest(bends) unnest(bends)
); );
end if; end if;
line = st_linemerge(st_union(bends)); lines[i] = st_linemerge(st_union(bends));
raise notice 'lines[i]: %', st_summary(lines[i]);
dbg_stage = dbg_stage + 1;
end loop; end loop;
dbg_stage = dbg_stage + 1;
end loop; end loop;
if l_type = 'ST_LineString' then if l_type = 'ST_LineString' then
return st_linemerge(st_union(bends)); return st_linemerge(st_union(lines));
elseif l_type = 'ST_MultiLineString' then elseif l_type = 'ST_MultiLineString' then
return st_union(bends); return st_union(lines);
end if; end if;
end end
$$ language plpgsql; $$ language plpgsql;