[geos-commits] [SCM] geos branch master updated. 64e823b26bc6a771571f39af245b0e0f4e256df8

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- Log -----------------------------------------------------------------
commit 64e823b26bc6a771571f39af245b0e0f4e256df8
Author: Mateusz Loskot <mateusz at loskot.net>
Date:   Tue Aug 29 17:02:33 2017 +0200

    Add GEOSPointOnSurface test for case of three similar polygons
    
    Might help to catch significant changes in
    algorithm calculating point on surface.
    
    Source https://trac.osgeo.org/geos/ticket/840

diff --git a/tests/unit/capi/GEOSPointOnSurfaceTest.cpp b/tests/unit/capi/GEOSPointOnSurfaceTest.cpp
index 41d4ec1..b6d0f9d 100644
--- a/tests/unit/capi/GEOSPointOnSurfaceTest.cpp
+++ b/tests/unit/capi/GEOSPointOnSurfaceTest.cpp
@@ -188,5 +188,61 @@ namespace tut
 
     }
 
+    // Check point on surface for three similar polygons (shapes)
+    // https://trac.osgeo.org/geos/ticket/840
+    template<>
+    template<>
+    void object::test<7>()
+    {
+      // Polygon A
+      {
+        geom1_ = GEOSGeomFromWKT("POLYGON(("
+          "182111.031940953 141935.935903267,181944.315698016 141813.663222482,"
+          "181993.426552077 141735.161360171,182025.215323227 141755.058841504,"
+          "182042.126877935 141723.338145732,182089.035943744 141755.453352846,"
+          "182096.699289843 141744.892410235,182142.107084301 141773.967727472,"
+          "182140.268233846 141825.482203511,182123.233970367 141827.369156254,"
+          "182111.031940953 141935.935903267))");
+        ensure(0 != geom1_);
+        geom2_ = GEOSPointOnSurface(geom1_);
+        ensure(0 != geom2_);
+
+        wkt_ = GEOSWKTWriter_write(wktw_, geom2_);
+        ensure_equals(std::string(wkt_), std::string("POINT (182077.08 141881.65)"));
+      }
+      // Polygon B
+      {
+        geom1_ = GEOSGeomFromWKT("POLYGON(("
+          "182512.231897141 141935.935903267,182344.315698016 141813.663222482,"
+          "182393.426552077 141735.161360171,182425.215323227 141755.058841504,"
+          "182442.126877935 141723.338145732,182489.035943744 141755.453352846,"
+          "182496.699289843 141744.892410235,182542.107084301 141773.967727472,"
+          "182540.268233846 141825.482203511,182522.034014178 141825.369229273,"
+          "182512.231897141 141935.935903267))");
+        ensure(0 != geom1_);
+        geom2_ = GEOSPointOnSurface(geom1_);
+        ensure(0 != geom2_);
+
+        wkt_ = GEOSWKTWriter_write(wktw_, geom2_);
+        ensure_equals(std::string(wkt_), std::string("POINT (182476.76 141880.71)"));
+      }
+      // Polygon C
+      {
+        geom1_ = GEOSGeomFromWKT("POLYGON(("
+          "182635.760119718 141846.477712277,182826.153168283 141974.473039044,"
+          "182834.952846998 141857.67730337,182862.151853936 141851.277537031,"
+          "182860.551912351 141779.280165725,182824.553226698 141748.881275618,"
+          "182814.953577191 141758.480925126,182766.155358861 141721.682268681,"
+          "182742.156235092 141744.881421657,182692.558045971 141716.882443927,"
+          "182635.760119718 141846.477712277))");
+        ensure(0 != geom1_);
+        geom2_ = GEOSPointOnSurface(geom1_);
+        ensure(0 != geom2_);
+
+        wkt_ = GEOSWKTWriter_write(wktw_, geom2_);
+        ensure_equals(std::string(wkt_), std::string("POINT (182755.89 141812.88)"));
+      }
+    }
+
 } // namespace tut
 

-----------------------------------------------------------------------

Summary of changes:
 tests/unit/capi/GEOSPointOnSurfaceTest.cpp |   56 ++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)


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