Re: [Boost-bugs] [Boost C++ Libraries] #10412: Offsetting polygons with buffer strategies fails for some distances

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #10412: Offsetting polygons with buffer strategies fails for some distances
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-08-30 11:54:56

#10412: Offsetting polygons with buffer strategies fails for some distances
-------------------------------------------------+-------------------------
  Reporter:  Olivier Tournaire                   |      Owner:
  <olivier.tournaire@…>                          |  barendgehrels
      Type:  Bugs                                |     Status:  assigned
 Milestone:  To Be Determined                    |  Component:  geometry
   Version:  Boost 1.56.0                        |   Severity:  Problem
Resolution:                                      |   Keywords:
-------------------------------------------------+-------------------------

Comment (by Olivier Tournaire <olivier.tournaire@…>):

 Barend,

 Here is the WKT output of the result I have with properly setting the
 join_miter strategy

 {{{
 boost::geometry::strategy::buffer::join_miter join_strategy(5);
 }}}

 {{{
 MULTIPOLYGON(((897758.022176 6270477.86127,897753.924459
 6270479.79837,897753.260513 6270478.36834,897752.590961
 6270476.92625,897751.19031 6270477.67851,897745.79031
 6270480.57851,897744.589559 6270481.2233,897744.578987
 6270481.20053,897743.167095 6270481.99124,897740.667095
 6270483.39124,897739.456815 6270484.06895,897740.038061
 6270485.32859,897740.628807 6270486.60855,897740.158704
 6270486.8436,897739.681451 6270485.71554,897739.030794
 6270484.17788,897737.571536 6270484.98877,897734.871536
 6270486.48877,897734.322818 6270486.79342,897734.154723
 6270487.39854,897731.662883 6270496.36917,897729.772209
 6270502.24021,897729.349234 6270503.55367,897730.5627
 6270504.05945,897730.521382 6270504.19259,897729.321449
 6270503.79231,897728.867404 6270505.2554,897724.367404
 6270519.7554,897723.989739 6270520.97227,897724.950215
 6270521.45221,897724.583255 6270522.50722,897724.091322
 6270523.92089,897725.504474 6270524.41579,897726.166015
 6270524.64733,897724.858639 6270529.1847,897724.446665
 6270530.61434,897725.872977 6270531.03794,897740.935934
 6270535.51118,897739.761803
 6270539.47387,897739.3533246270540.85215,897740.713158
 6270541.3188,897749.631289 6270544.37894,897749.239238
 6270546.05916,897748.924674 6270547.40667,897750.242836
 6270547.82864,897751.319656 6270548.17321,897746.369626
 6270563.84831,897745.922589 6270565.26383,897747.333441
 6270565.7256,897763.833441 6270571.1256,897765.290232
 6270571.60234,897765.735356 6270570.13561,897777.935356
 6270529.93561,897778.378151 6270528.47657,897776.912082
 6270528.05772,897768.512082 6270525.65772,897766.973821
 6270525.21819,897766.634235 6270526.78136,897766.484462
 6270527.47033,897756.764653 6270524.37375,897747.679795
 6270521.34548,897753.428807 6270503.35663,897753.857197
 6270502.01612,897752.546599 6270501.50314,897751.949361
 6270501.26944,897753.07992 6270500.5813,897754.011277
 6270500.01439,897754.470123 6270500.89385,897755.181727
 6270502.25806,897756.527452 6270501.5118,897767.527452
 6270495.4118,897768.615091 6270494.80865,897768.426519
 6270495.64354,897769.778325 6270496.03951,897779.678325
 6270498.93951,897781.094901 6270499.35448,897781.532596
 6270497.9446,897781.973939 6270496.52252,897786.311014
 6270498.01806,897787.810238 6270498.53502,897788.243056
 6270497.00938,897792.243056 6270482.90938,897792.636401
 6270481.5228,897791.266559 6270481.07441,897787.081458
 6270479.70474,897787.358581 6270478.55006,897787.691239
 6270477.16332,897786.323249 6270476.76095,897769.323249
 6270471.76095,897767.902001 6270471.34296,897767.466331
 6270472.75887,897767.104364 6270473.93527,897766.531022
 6270473.76326,897765.934035 6270473.58454,897765.386724
 6270473.88044,897758.022176 6270477.86127),(897745.949075
 6270483.99703,897745.891685 6270484.02777,897745.512854
 6270483.21183,897745.949075 6270483.99703),(897751.587432
 6270501.12781,897751.644105 6270500.96346,897751.828698
 6270501.22222,897751.587432 6270501.12781),(897768.669004
 6270494.56997,897768.161939 6270493.47142,897767.641372
 6270492.34352,897768.290014 6270492.10328,897769.151215
 6270492.43451,897768.736838 6270494.26961,897768.669004 6270494.56997)))
 }}}

 Can you please copy / paste your result as WKT? And maybe a screenshot?

 Please also find attached some new screenshots showing the self
 intersecting parts.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10412#comment:3>
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