Open
Description
Hi,
When I use the buffer() I find that at certain distances it produces illegal results, it looks more like contaminated data has been added to the correct result?
example code:
#include "boost/geometry.hpp"
#include "catch2/catch_test_macros.hpp"
namespace bg = boost::geometry;
using Point = bg::model::point<float, 2, bg::cs::cartesian>;
using Ring = bg::model::ring<Point, false, false>;
using Polygon = bg::model::polygon<Point, false, false>;
using MultiPolygon = bg::model::multi_polygon<Polygon>;
MultiPolygon buffer(const Polygon &geometry_in, float distance) {
MultiPolygon out;
const boost::geometry::strategy::buffer::join_miter join_strategy;
const boost::geometry::strategy::buffer::distance_symmetric<float>
distance_strategy(distance);
const boost::geometry::strategy::buffer::end_flat end_strategy;
const boost::geometry::strategy::buffer::side_straight side_strategy;
const boost::geometry::strategy::buffer::point_square point_strategy;
boost::geometry::buffer(geometry_in,
out,
distance_strategy,
side_strategy,
join_strategy,
end_strategy,
point_strategy);
return out;
}
TEST_CASE("Test buffer", "[geometry][boost]") {
Polygon polygon{{
{947.5782470703125, 213.50489807128906},
{947.5782470703125, 214.68368530273438},
{972.321533203125, 214.68368530273438},
{972.321533203125, 215.86245727539062},
{973.4461669921875, 215.86245727539062},
{973.4461669921875, 217.04124450683594},
{974.5709228515625, 217.04124450683594},
{974.5709228515625, 218.22003173828125},
{975.695556640625, 218.22003173828125},
{975.695556640625, 219.3988037109375},
{979.0697021484375, 219.3988037109375},
{979.0697021484375, 218.22003173828125},
{983.5684814453125, 218.22003173828125},
{983.5684814453125, 217.04124450683594},
{1025.18212890625, 217.04124450683594},
{1025.18212890625, 215.86245727539062},
{1029.680908203125, 215.86245727539062},
{1029.680908203125, 217.04124450683594},
{1030.8055419921875, 217.04124450683594},
{1030.8055419921875, 215.86245727539062},
{1034.1796875, 215.86245727539062},
{1034.1796875, 217.04124450683594},
{1036.4290771484375, 217.04124450683594},
{1036.4290771484375, 220.5775909423828},
{1035.3043212890625, 220.5775909423828},
{1035.3043212890625, 221.75637817382812},
{1034.1796875, 221.75637817382812},
{1034.1796875, 222.93515014648438},
{1030.8055419921875, 222.93515014648438},
{1030.8055419921875, 224.1139373779297},
{1028.55615234375, 224.1139373779297},
{1028.55615234375, 225.292724609375},
{1026.3067626953125, 225.292724609375},
{1026.3067626953125, 226.47149658203125},
{1022.9327392578125, 226.47149658203125},
{1022.9327392578125, 227.65028381347656},
{1019.55859375, 227.65028381347656},
{1019.55859375, 228.82907104492188},
{1018.4339599609375, 228.82907104492188},
{1018.4339599609375, 233.544189453125},
{1017.3092041015625, 233.544189453125},
{1017.3092041015625, 235.90174865722656},
{1016.1845703125, 235.90174865722656},
{1016.1845703125, 237.08053588867188},
{1015.059814453125, 237.08053588867188},
{1015.059814453125, 238.2593231201172},
{1010.56103515625, 238.2593231201172},
{1010.56103515625, 239.43809509277344},
{1009.4364013671875, 239.43809509277344},
{1009.4364013671875, 241.79566955566406},
{1008.3116455078125, 241.79566955566406},
{1008.3116455078125, 245.33200073242188},
{1007.18701171875, 245.33200073242188},
{1007.18701171875, 246.51080322265625},
{1006.0623779296875, 246.51080322265625},
{1006.0623779296875, 248.86834716796875},
{1004.9376220703125, 248.86834716796875},
{1004.9376220703125, 251.22592163085938},
{1003.81298828125, 251.22592163085938},
{1003.81298828125, 254.76226806640625},
{1002.688232421875, 254.76226806640625},
{1002.688232421875, 259.4773864746094},
{1001.5635986328125, 259.4773864746094},
{1001.5635986328125, 261.8349609375},
{1000.4388427734375, 261.8349609375},
{1000.4388427734375, 263.01373291015625},
{999.314208984375, 263.01373291015625},
{999.314208984375, 264.1925354003906},
{997.0648193359375, 264.1925354003906},
{997.0648193359375, 265.3713073730469},
{995.9400634765625, 265.3713073730469},
{995.9400634765625, 267.7288513183594},
{994.8154296875, 267.7288513183594},
{994.8154296875, 268.90765380859375},
{993.690673828125, 268.90765380859375},
{993.690673828125, 270.08642578125},
{992.5660400390625, 270.08642578125},
{992.5660400390625, 271.26519775390625},
{991.4412841796875, 271.26519775390625},
{991.4412841796875, 273.6227722167969},
{990.316650390625, 273.6227722167969},
{990.316650390625, 274.8015441894531},
{989.19189453125, 274.8015441894531},
{989.19189453125, 277.15911865234375},
{988.0672607421875, 277.15911865234375},
{988.0672607421875, 278.337890625},
{985.81787109375, 278.337890625},
{985.81787109375, 277.15911865234375},
{984.693115234375, 277.15911865234375},
{984.693115234375, 275.9803466796875},
{982.4437255859375, 275.9803466796875},
{982.4437255859375, 277.15911865234375},
{980.1943359375, 277.15911865234375},
{980.1943359375, 278.337890625},
{979.0697021484375, 278.337890625},
{979.0697021484375, 280.6954650878906},
{977.9449462890625, 280.6954650878906},
{977.9449462890625, 281.8742370605469},
{976.8203125, 281.8742370605469},
{976.8203125, 283.05303955078125},
{977.9449462890625, 283.05303955078125},
{977.9449462890625, 285.41058349609375},
{976.8203125, 285.41058349609375},
{976.8203125, 286.5893859863281},
{975.695556640625, 286.5893859863281},
{975.695556640625, 287.7681579589844},
{971.19677734375, 287.7681579589844},
{971.19677734375, 288.9469299316406},
{961.0745849609375, 288.9469299316406},
{961.0745849609375, 290.125732421875},
{955.4510498046875, 290.125732421875},
{955.4510498046875, 291.30450439453125},
{953.20166015625, 291.30450439453125},
{953.20166015625, 292.4832763671875},
{952.0770263671875, 292.4832763671875},
{952.0770263671875, 293.6620788574219},
{947.5782470703125, 293.6620788574219},
{947.5782470703125, 294.8408508300781},
{945.328857421875, 294.8408508300781},
{945.328857421875, 296.0196228027344},
{943.0794677734375, 296.0196228027344},
{943.0794677734375, 297.19842529296875},
{941.9547119140625, 297.19842529296875},
{941.9547119140625, 298.377197265625},
{940.830078125, 298.377197265625},
{940.830078125, 299.55596923828125},
{939.705322265625, 299.55596923828125},
{939.705322265625, 300.7347717285156},
{938.5806884765625, 300.7347717285156},
{938.5806884765625, 301.9135437011719},
{937.4559326171875, 301.9135437011719},
{937.4559326171875, 303.0923156738281},
{928.4583740234375, 303.0923156738281},
{928.4583740234375, 301.9135437011719},
{922.8349609375, 301.9135437011719},
{922.8349609375, 303.0923156738281},
{914.9620361328125, 303.0923156738281},
{914.9620361328125, 304.2711181640625},
{909.338623046875, 304.2711181640625},
{909.338623046875, 305.44989013671875},
{904.83984375, 305.44989013671875},
{904.83984375, 304.2711181640625},
{903.715087890625, 304.2711181640625},
{903.715087890625, 303.0923156738281},
{901.4656982421875, 303.0923156738281},
{901.4656982421875, 304.2711181640625},
{898.0916748046875, 304.2711181640625},
{898.0916748046875, 305.44989013671875},
{887.9693603515625, 305.44989013671875},
{887.9693603515625, 306.628662109375},
{886.8447265625, 306.628662109375},
{886.8447265625, 308.9862365722656},
{885.719970703125, 308.9862365722656},
{885.719970703125, 310.1650085449219},
{884.5953369140625, 310.1650085449219},
{884.5953369140625, 311.3437805175781},
{883.4705810546875, 311.3437805175781},
{883.4705810546875, 312.5225830078125},
{882.345947265625, 312.5225830078125},
{882.345947265625, 318.4164733886719},
{881.22119140625, 318.4164733886719},
{881.22119140625, 320.7740478515625},
{880.0965576171875, 320.7740478515625},
{880.0965576171875, 321.95281982421875},
{878.9718627929688, 321.95281982421875},
{878.9718627929688, 323.1316223144531},
{877.84716796875, 323.1316223144531},
{877.84716796875, 324.3103942871094},
{876.7224731445312, 324.3103942871094},
{876.7224731445312, 325.4891662597656},
{875.5977783203125, 325.4891662597656},
{875.5977783203125, 326.66796875},
{873.348388671875, 326.66796875},
{873.348388671875, 327.84674072265625},
{871.0989990234375, 327.84674072265625},
{871.0989990234375, 329.0255126953125},
{868.849609375, 329.0255126953125},
{868.849609375, 330.2043151855469},
{865.4755249023438, 330.2043151855469},
{865.4755249023438, 331.3830871582031},
{862.1014404296875, 331.3830871582031},
{862.1014404296875, 332.5618591308594},
{857.6026611328125, 332.5618591308594},
{857.6026611328125, 333.74066162109375},
{854.2285766601562, 333.74066162109375},
{854.2285766601562, 332.5618591308594},
{848.6051025390625, 332.5618591308594},
{848.6051025390625, 331.3830871582031},
{847.4804077148438, 331.3830871582031},
{847.4804077148438, 330.2043151855469},
{845.2310180664062, 330.2043151855469},
{845.2310180664062, 329.0255126953125},
{835.1087646484375, 329.0255126953125},
{835.1087646484375, 327.84674072265625},
{830.6099853515625, 327.84674072265625},
{830.6099853515625, 329.0255126953125},
{813.7395629882812, 329.0255126953125},
{813.7395629882812, 327.84674072265625},
{808.1160888671875, 327.84674072265625},
{808.1160888671875, 326.66796875},
{805.86669921875, 326.66796875},
{805.86669921875, 325.4891662597656},
{787.8716430664062, 325.4891662597656},
{787.8716430664062, 323.1316223144531},
{785.6222534179688, 323.1316223144531},
{785.6222534179688, 320.7740478515625},
{788.996337890625, 320.7740478515625},
{788.996337890625, 319.59527587890625},
{791.2457275390625, 319.59527587890625},
{791.2457275390625, 316.0589294433594},
{792.370361328125, 316.0589294433594},
{792.370361328125, 314.880126953125},
{793.4950561523438, 314.880126953125},
{793.4950561523438, 313.70135498046875},
{794.6197509765625, 313.70135498046875},
{794.6197509765625, 311.3437805175781},
{793.4950561523438, 311.3437805175781},
{793.4950561523438, 310.1650085449219},
{786.7469482421875, 310.1650085449219},
{786.7469482421875, 311.3437805175781},
{782.2481689453125, 311.3437805175781},
{782.2481689453125, 312.5225830078125},
{779.998779296875, 312.5225830078125},
{779.998779296875, 313.70135498046875},
{777.7493896484375, 313.70135498046875},
{777.7493896484375, 314.880126953125},
{776.6246948242188, 314.880126953125},
{776.6246948242188, 316.0589294433594},
{775.5, 316.0589294433594},
{775.5, 318.4164733886719},
{776.6246948242188, 318.4164733886719},
{776.6246948242188, 323.1316223144531},
{777.7493896484375, 323.1316223144531},
{777.7493896484375, 333.74066162109375},
{776.6246948242188, 333.74066162109375},
{776.6246948242188, 337.2770080566406},
{777.7493896484375, 337.2770080566406},
{777.7493896484375, 338.4557800292969},
{779.998779296875, 338.4557800292969},
{779.998779296875, 339.6345520019531},
{781.1234741210938, 339.6345520019531},
{781.1234741210938, 340.8133544921875},
{783.3728637695312, 340.8133544921875},
{783.3728637695312, 339.6345520019531},
{787.8716430664062, 339.6345520019531},
{787.8716430664062, 340.8133544921875},
{788.996337890625, 340.8133544921875},
{788.996337890625, 341.99212646484375},
{791.2457275390625, 341.99212646484375},
{791.2457275390625, 344.3497009277344},
{792.370361328125, 344.3497009277344},
{792.370361328125, 346.7072448730469},
{790.1210327148438, 346.7072448730469},
{790.1210327148438, 347.88604736328125},
{786.7469482421875, 347.88604736328125},
{786.7469482421875, 349.0648193359375},
{784.49755859375, 349.0648193359375},
{784.49755859375, 350.24359130859375},
{783.3728637695312, 350.24359130859375},
{783.3728637695312, 352.6011657714844},
{782.2481689453125, 352.6011657714844},
{782.2481689453125, 354.9587097167969},
{781.1234741210938, 354.9587097167969},
{781.1234741210938, 356.13751220703125},
{778.8740844726562, 356.13751220703125},
{778.8740844726562, 357.3162841796875},
{777.7493896484375, 357.3162841796875},
{777.7493896484375, 356.13751220703125},
{773.2506103515625, 356.13751220703125},
{773.2506103515625, 352.6011657714844},
{769.8765258789062, 352.6011657714844},
{769.8765258789062, 351.4223937988281},
{768.7518310546875, 351.4223937988281},
{768.7518310546875, 349.0648193359375},
{769.8765258789062, 349.0648193359375},
{769.8765258789062, 346.7072448730469},
{771.001220703125, 346.7072448730469},
{771.001220703125, 345.5284729003906},
{772.1259155273438, 345.5284729003906},
{772.1259155273438, 344.3497009277344},
{771.001220703125, 344.3497009277344},
{771.001220703125, 341.99212646484375},
{772.1259155273438, 341.99212646484375},
{772.1259155273438, 340.8133544921875},
{773.2506103515625, 340.8133544921875},
{773.2506103515625, 338.4557800292969},
{774.3753051757812, 338.4557800292969},
{774.3753051757812, 336.09820556640625},
{773.2506103515625, 336.09820556640625},
{773.2506103515625, 333.74066162109375},
{772.1259155273438, 333.74066162109375},
{772.1259155273438, 330.2043151855469},
{773.2506103515625, 330.2043151855469},
{773.2506103515625, 323.1316223144531},
{772.1259155273438, 323.1316223144531},
{772.1259155273438, 320.7740478515625},
{768.7518310546875, 320.7740478515625},
{768.7518310546875, 323.1316223144531},
{765.3777465820312, 323.1316223144531},
{765.3777465820312, 321.95281982421875},
{764.2530517578125, 321.95281982421875},
{764.2530517578125, 317.2377014160156},
{765.3777465820312, 317.2377014160156},
{765.3777465820312, 314.880126953125},
{766.50244140625, 314.880126953125},
{766.50244140625, 312.5225830078125},
{767.6271362304688, 312.5225830078125},
{767.6271362304688, 310.1650085449219},
{768.7518310546875, 310.1650085449219},
{768.7518310546875, 306.628662109375},
{773.2506103515625, 306.628662109375},
{773.2506103515625, 307.8074645996094},
{774.3753051757812, 307.8074645996094},
{774.3753051757812, 306.628662109375},
{775.5, 306.628662109375},
{775.5, 304.2711181640625},
{776.6246948242188, 304.2711181640625},
{776.6246948242188, 296.0196228027344},
{778.8740844726562, 296.0196228027344},
{778.8740844726562, 298.377197265625},
{779.998779296875, 298.377197265625},
{779.998779296875, 300.7347717285156},
{781.1234741210938, 300.7347717285156},
{781.1234741210938, 301.9135437011719},
{782.2481689453125, 301.9135437011719},
{782.2481689453125, 303.0923156738281},
{783.3728637695312, 303.0923156738281},
{783.3728637695312, 304.2711181640625},
{784.49755859375, 304.2711181640625},
{784.49755859375, 305.44989013671875},
{785.6222534179688, 305.44989013671875},
{785.6222534179688, 306.628662109375},
{791.2457275390625, 306.628662109375},
{791.2457275390625, 305.44989013671875},
{793.4950561523438, 305.44989013671875},
{793.4950561523438, 304.2711181640625},
{795.7444458007812, 304.2711181640625},
{795.7444458007812, 303.0923156738281},
{799.1185302734375, 303.0923156738281},
{799.1185302734375, 301.9135437011719},
{802.4926147460938, 301.9135437011719},
{802.4926147460938, 300.7347717285156},
{804.7420043945312, 300.7347717285156},
{804.7420043945312, 299.55596923828125},
{805.86669921875, 299.55596923828125},
{805.86669921875, 298.377197265625},
{808.1160888671875, 298.377197265625},
{808.1160888671875, 297.19842529296875},
{811.4901733398438, 297.19842529296875},
{811.4901733398438, 296.0196228027344},
{813.7395629882812, 296.0196228027344},
{813.7395629882812, 294.8408508300781},
{815.9889526367188, 294.8408508300781},
{815.9889526367188, 293.6620788574219},
{819.363037109375, 293.6620788574219},
{819.363037109375, 292.4832763671875},
{821.6124267578125, 292.4832763671875},
{821.6124267578125, 291.30450439453125},
{823.86181640625, 291.30450439453125},
{823.86181640625, 290.125732421875},
{827.2359008789062, 290.125732421875},
{827.2359008789062, 288.9469299316406},
{831.7346801757812, 288.9469299316406},
{831.7346801757812, 287.7681579589844},
{838.4828491210938, 287.7681579589844},
{838.4828491210938, 286.5893859863281},
{844.1063232421875, 286.5893859863281},
{844.1063232421875, 285.41058349609375},
{849.7297973632812, 285.41058349609375},
{849.7297973632812, 284.2318115234375},
{854.2285766601562, 284.2318115234375},
{854.2285766601562, 283.05303955078125},
{858.7273559570312, 283.05303955078125},
{858.7273559570312, 281.8742370605469},
{862.1014404296875, 281.8742370605469},
{862.1014404296875, 280.6954650878906},
{866.6002197265625, 280.6954650878906},
{866.6002197265625, 279.5166931152344},
{871.0989990234375, 279.5166931152344},
{871.0989990234375, 278.337890625},
{880.0965576171875, 278.337890625},
{880.0965576171875, 277.15911865234375},
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}};
CHECK(bg::is_valid(polygon));
const auto result1 = buffer(polygon, 40);
const auto result2 = buffer(polygon, 50);
const auto result3 = buffer(polygon, 60);
CHECK(result1.size() == 1);
CHECK(result2.size() == 1);
CHECK(result3.size() == 1);
}result1 and result3 seem to be correct. but result2 appears to have contaminated data added to the correct result.
Tried the following versions, all have the same problem: 1.84.0, 1.85.0, 1.87.0