clean up debugging and test output
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@ -18,14 +18,13 @@ insert into figures (name, way) values ('fig3-1',ST_GeomFromText('LINESTRING(0 0
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insert into figures (name, way) values ('fig5',ST_GeomFromText('LINESTRING(0 39,19 52,27 77,26 104,41 115,49 115,65 103,65 75,53 45,63 15,91 0)'));
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insert into figures (name, way) values ('fig5',ST_GeomFromText('LINESTRING(0 39,19 52,27 77,26 104,41 115,49 115,65 103,65 75,53 45,63 15,91 0)'));
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insert into figures (name, way) values ('inflection-1',ST_GeomFromText('LINESTRING(110 24,114 20,133 20,145 15,145 0,136 5,123 7,114 7,111 2)'));
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insert into figures (name, way) values ('inflection-1',ST_GeomFromText('LINESTRING(110 24,114 20,133 20,145 15,145 0,136 5,123 7,114 7,111 2)'));
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-- tables are for manual inspection using, say, qgis
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-- DETECT BENDS
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drop table if exists bends;
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drop table if exists bends;
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create table bends (name text, way geometry);
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create table bends (name text, way geometry);
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insert into bends select 'fig3', unnest(detect_bends((select way from figures where name='fig3')));
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insert into bends select 'fig3', unnest(detect_bends((select way from figures where name='fig3')));
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insert into bends select 'fig5', unnest(detect_bends((select way from figures where name='fig5')));
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insert into bends select 'fig5', unnest(detect_bends((select way from figures where name='fig5')));
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insert into bends select 'inflection-1', unnest(detect_bends((select way from figures where name='inflection-1')));
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insert into bends select 'inflection-1', unnest(detect_bends((select way from figures where name='inflection-1')));
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-- DETECT BENDS
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do $$
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do $$
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declare
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declare
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vbends geometry[];
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vbends geometry[];
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@ -41,13 +40,13 @@ begin
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perform assert_equals(3, array_length(vbends, 1));
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perform assert_equals(3, array_length(vbends, 1));
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end $$ language plpgsql;
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end $$ language plpgsql;
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-- FIX BEND INFLECTIONS
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drop table if exists inflections;
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drop table if exists inflections;
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create table inflections (name text, way geometry);
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create table inflections (name text, way geometry);
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insert into inflections select 'fig3', unnest(fix_gentle_inflections(detect_bends((select way from figures where name='fig3'))));
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insert into inflections select 'fig3', unnest(fix_gentle_inflections(detect_bends((select way from figures where name='fig3'))));
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insert into inflections select 'fig5', unnest(fix_gentle_inflections(detect_bends((select way from figures where name='fig5'))));
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insert into inflections select 'fig5', unnest(fix_gentle_inflections(detect_bends((select way from figures where name='fig5'))));
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insert into inflections select 'inflection-1', unnest(fix_gentle_inflections(detect_bends((select way from figures where name='inflection-1'))));
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insert into inflections select 'inflection-1', unnest(fix_gentle_inflections(detect_bends((select way from figures where name='inflection-1'))));
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-- FIX BEND INFLECTIONS
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do $$
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do $$
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declare
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declare
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vbends geometry[];
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vbends geometry[];
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@ -148,19 +148,15 @@ begin
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-- if inflection angle between ptail[1:3] "large", stop processing this bend
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-- if inflection angle between ptail[1:3] "large", stop processing this bend
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if abs(st_angle(phead[1], phead[2], phead[3]) - pi) > small_angle then
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if abs(st_angle(phead[1], phead[2], phead[3]) - pi) > small_angle then
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--raise notice 'quitting % because angle between % % %', st_astext(ptail), st_astext(phead[1]), st_astext(phead[2]), st_astext(phead[3]);
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exit;
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exit;
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end if;
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end if;
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-- distance from head's first vertex should be larger than from second vertex
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-- distance from head's first vertex should be larger than from second vertex
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if st_distance(ptail, phead[2]) < st_distance(ptail, phead[3]) then
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if st_distance(ptail, phead[2]) < st_distance(ptail, phead[3]) then
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--raise notice 'quitting % because distance', st_astext(ptail);
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exit;
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exit;
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end if;
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end if;
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-- detected a gentle inflection. Move head of the tail to the tail of head
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-- detected a gentle inflection. Move head of the tail to the tail of head
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--raise notice 'fixing a gentle inflection of angle %', degrees(abs(st_angle(phead[1], phead[2], phead[3]) - pi));
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bends[i] = st_removepoint(bends[i], 0);
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bends[i] = st_removepoint(bends[i], 0);
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bends[i-1] = st_addpoint(bends[i-1], phead[3]);
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bends[i-1] = st_addpoint(bends[i-1], phead[3]);
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end loop;
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end loop;
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