Fixed QgsGeometry::fromPolygon:

wonder · wonder · commit eb4cee126713 · 2007-06-02T01:24:38.000Z
- fixed creation of outer ring, added creation of holes - fixed Python binding for QgsPolygon type git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@6974 c8812cc2-4d05-0410-92ff-de0c093fc19c
diff --git a/python/core/qgsgeometry.sip b/python/core/qgsgeometry.sip
@@ -50,20 +50,21 @@ template <TYPE>
 %End
 
 %ConvertToTypeCode
+  const sipMappedType* qvector_qgspoint = sipFindMappedType("QVector<QgsPoint>");
+  
   // Check the type if that is all that is required.
   if (sipIsErr == NULL)
   {
     if (!PyList_Check(sipPy))
       return 0;
 
     for (int i = 0; i < PyList_GET_SIZE(sipPy); ++i)
-      if (!sipCanConvertToInstance(PyList_GET_ITEM(sipPy, i), sipClass_TYPE, SIP_NOT_NONE))
+      if (!sipCanConvertToMappedType(PyList_GET_ITEM(sipPy, i), qvector_qgspoint, SIP_NOT_NONE))
         return 0;
 
     return 1;
   }
 
-  const sipMappedType* qvector_qgspoint = sipFindMappedType("QVector<QgsPoint>");
   
   QVector< QVector<TYPE> > *ql = new QVector< QVector<TYPE> >;
 
@@ -124,21 +125,22 @@ template <TYPE>
 %End
 
 %ConvertToTypeCode
+  
+  const sipMappedType* qvector_qgspoint = sipFindMappedType("QVector<QVector<QgsPoint> >");
+  
   // Check the type if that is all that is required.
   if (sipIsErr == NULL)
   {
     if (!PyList_Check(sipPy))
       return 0;
 
-    // TODO: this is not correct!
     for (int i = 0; i < PyList_GET_SIZE(sipPy); ++i)
-      if (!sipCanConvertToInstance(PyList_GET_ITEM(sipPy, i), sipClass_TYPE, SIP_NOT_NONE))
+      if (!sipCanConvertToMappedType(PyList_GET_ITEM(sipPy, i), qvector_qgspoint, SIP_NOT_NONE))
         return 0;
 
     return 1;
   }
 
-  const sipMappedType* qvector_qgspoint = sipFindMappedType("QVector<QVector<QgsPoint> >");
   
   QVector< QVector< QVector<TYPE> > > *ql = new QVector< QVector< QVector<TYPE> > >;
 
diff --git a/src/core/qgsgeometry.cpp b/src/core/qgsgeometry.cpp
@@ -26,7 +26,7 @@ email                : morb at ozemail dot com dot au
 #include "qgsrect.h"
 
 // Set up static GEOS geometry factory
-GEOS_GEOM::GeometryFactory* QgsGeometry::geosGeometryFactory = new GEOS_GEOM::GeometryFactory();
+static GEOS_GEOM::GeometryFactory* geosGeometryFactory = new GEOS_GEOM::GeometryFactory();
 
 
 QgsGeometry::QgsGeometry()
@@ -69,7 +69,7 @@ mDirtyGeos( rhs.mDirtyGeos )
 	      {
 		polygonVector.push_back((GEOS_GEOM::Geometry*)(multiPoly->getGeometryN(i)));
 	      }
-	    mGeos = QgsGeometry::geosGeometryFactory->createMultiPolygon(polygonVector);
+	    mGeos = geosGeometryFactory->createMultiPolygon(polygonVector);
 	  }
       }
     else
@@ -120,24 +120,47 @@ QgsGeometry* QgsGeometry::fromPolyline(const QgsPolyline& polyline)
   return g;
 }
 
-QgsGeometry* QgsGeometry::fromPolygon(const QgsPolygon& polygon)
+static GEOS_GEOM::LinearRing* _createGeosLinearRing(const QgsPolyline& ring)
 {
-  const GEOS_GEOM::CoordinateSequenceFactory* seqFactory = GEOS_GEOM::COORD_SEQ_FACTORY::instance();  
-  const QgsPolyline& ring0 = polygon[0];
+  // LinearRing in GEOS must have the first point the same as the last one
+  bool needRepeatLastPnt = (ring[0] != ring[ring.count()-1]);
 
-  // outer ring
-  GEOS_GEOM::CoordinateSequence* seq = seqFactory->create(ring0.count(), 2);
+  const GEOS_GEOM::CoordinateSequenceFactory* seqFactory = GEOS_GEOM::COORD_SEQ_FACTORY::instance();
+
+  GEOS_GEOM::CoordinateSequence* seq = seqFactory->create(ring.count() + (needRepeatLastPnt ? 1 : 0), 2);
   QgsPolyline::const_iterator it;
   int i = 0;
-  for (it = ring0.begin(); it != ring0.end(); ++it)
+  for (it = ring.begin(); it != ring.end(); ++it)
   {
     seq->setAt(GEOS_GEOM::Coordinate(it->x(), it->y()), i++);
   }
+  
+  // add the first point to close the ring if needed
+  if (needRepeatLastPnt)
+    seq->setAt(GEOS_GEOM::Coordinate(ring[0].x(), ring[0].y()), ring.count());
+  
   // ring takes ownership of the sequence
-  GEOS_GEOM::LinearRing* outerRing = geosGeometryFactory->createLinearRing(seq);
+  GEOS_GEOM::LinearRing* linRing = geosGeometryFactory->createLinearRing(seq);
+  
+  return linRing;
+}
 
-  std::vector<GEOS_GEOM::Geometry*>* holes = new std::vector<GEOS_GEOM::Geometry*>;
-  // TODO: holes
+QgsGeometry* QgsGeometry::fromPolygon(const QgsPolygon& polygon)
+{
+  if (polygon.count() == 0)
+    return NULL;
+  
+  const QgsPolyline& ring0 = polygon[0];
+  
+  // outer ring
+  GEOS_GEOM::LinearRing* outerRing = _createGeosLinearRing(ring0);
+  
+  // holes
+  std::vector<GEOS_GEOM::Geometry*>* holes = new std::vector<GEOS_GEOM::Geometry*> (polygon.count()-1);
+  for (int i = 1; i < polygon.count(); i++)
+  {
+    (*holes)[i-1] = _createGeosLinearRing(polygon[i]);
+  }
 
   // new geometry takes ownership of outerRing and vector of holes
   GEOS_GEOM::Geometry* geom = geosGeometryFactory->createPolygon(outerRing, holes);
@@ -191,7 +214,7 @@ QgsGeometry & QgsGeometry::operator=( QgsGeometry const & rhs )
 	      {
 		polygonVector.push_back((GEOS_GEOM::Geometry*)(multiPoly->getGeometryN(i)));
 	      }
-	    mGeos = QgsGeometry::geosGeometryFactory->createMultiPolygon(polygonVector);
+	    mGeos = geosGeometryFactory->createMultiPolygon(polygonVector);
 	  }
       }
     else
diff --git a/src/core/qgsgeometry.h b/src/core/qgsgeometry.h
@@ -291,11 +291,6 @@ not disjoint with existing polygons of the feature*/
 
   private:
 
-    // Private static members
-
-    //! This is used to create new GEOS variables.
-    static GEOS_GEOM::GeometryFactory* geosGeometryFactory;
-
 
     // Private variables
 
