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C++ QgsMultiPolyline::constBegin方法代码示例

本文整理汇总了C++中QgsMultiPolyline::constBegin方法的典型用法代码示例。如果您正苦于以下问题:C++ QgsMultiPolyline::constBegin方法的具体用法?C++ QgsMultiPolyline::constBegin怎么用?C++ QgsMultiPolyline::constBegin使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在QgsMultiPolyline的用法示例。


在下文中一共展示了QgsMultiPolyline::constBegin方法的5个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: convertToSingleLine

QgsGeometry* QgsMapToolOffsetCurve::convertToSingleLine( QgsGeometry* geom, int vertex, bool& isMulti )
{
  if ( !geom )
  {
    return 0;
  }

  isMulti = false;
  QGis::WkbType geomType = geom->wkbType();
  if ( geomType == QGis::WKBLineString || geomType == QGis::WKBLineString25D )
  {
    return geom;
  }
  else if ( geomType == QGis::WKBMultiLineString || geomType == QGis::WKBMultiLineString25D )
  {
    //search vertex
    isMulti = true;
    int currentVertex = 0;
    QgsMultiPolyline multiLine = geom->asMultiPolyline();
    QgsMultiPolyline::const_iterator it = multiLine.constBegin();
    for ( ; it != multiLine.constEnd(); ++it )
    {
      currentVertex += it->size();
      if ( vertex < currentVertex )
      {
        QgsGeometry* g = QgsGeometry::fromPolyline( *it );
        delete geom;
        return g;
      }
    }
  }
  delete geom;
  return 0;
}
开发者ID:sourcepole,项目名称:kadas-albireo,代码行数:34,代码来源:qgsmaptooloffsetcurve.cpp

示例2: closestMultilineElement

QgsGeometry QgsTransectSample::closestMultilineElement( const QgsPoint& pt, const QgsGeometry& multiLine )
{
  if ( !multiLine || ( multiLine.wkbType() != QgsWkbTypes::MultiLineString
                       && multiLine.wkbType() != QgsWkbTypes::MultiLineString25D ) )
  {
    return QgsGeometry();
  }

  double minDist = DBL_MAX;
  double currentDist = 0;
  QgsGeometry currentLine;
  QgsGeometry closestLine;
  QgsGeometry pointGeom = QgsGeometry::fromPoint( pt );

  QgsMultiPolyline multiPolyline = multiLine.asMultiPolyline();
  QgsMultiPolyline::const_iterator it = multiPolyline.constBegin();
  for ( ; it != multiPolyline.constEnd(); ++it )
  {
    currentLine = QgsGeometry::fromPolyline( *it );
    currentDist = pointGeom.distance( currentLine );
    if ( currentDist < minDist )
    {
      minDist = currentDist;
      closestLine = currentLine;
    }
  }

  return closestLine;
}
开发者ID:NyakudyaA,项目名称:QGIS,代码行数:29,代码来源:qgstransectsample.cpp

示例3: closestMultilineElement

QgsGeometry* QgsTransectSample::closestMultilineElement( const QgsPoint& pt, QgsGeometry* multiLine )
{
  if ( !multiLine || ( multiLine->wkbType() != QGis::WKBMultiLineString
                       && multiLine->wkbType() != QGis::WKBMultiLineString25D ) )
  {
    return 0;
  }

  double minDist = DBL_MAX;
  double currentDist = 0;
  QgsGeometry* currentLine = 0;
  QgsGeometry* closestLine = 0;
  QgsGeometry* pointGeom = QgsGeometry::fromPoint( pt );

  QgsMultiPolyline multiPolyline = multiLine->asMultiPolyline();
  QgsMultiPolyline::const_iterator it = multiPolyline.constBegin();
  for ( ; it != multiPolyline.constEnd(); ++it )
  {
    currentLine = QgsGeometry::fromPolyline( *it );
    currentDist = pointGeom->distance( *currentLine );
    if ( currentDist < minDist )
    {
      minDist = currentDist;
      closestLine = currentLine;
    }
    else
    {
      delete currentLine;
    }
  }

  delete pointGeom;
  return closestLine;
}
开发者ID:ACorradini,项目名称:QGIS,代码行数:34,代码来源:qgstransectsample.cpp

示例4: createMultiLineStringElem

QDomElement QgsWFSServer::createMultiLineStringElem( QgsGeometry* geom, QDomDocument& doc ) const
{
  if ( !geom )
  {
    return QDomElement();
  }

  QDomElement multiLineStringElem = doc.createElement( "gml:MultiLineString" );
  QgsMultiPolyline multiline = geom->asMultiPolyline();

  QgsMultiPolyline::const_iterator multiLineIt = multiline.constBegin();
  for ( ; multiLineIt != multiline.constEnd(); ++multiLineIt )
  {
    QgsGeometry* lineGeom = QgsGeometry::fromPolyline( *multiLineIt );
    if ( lineGeom )
    {
      QDomElement lineStringMemberElem = doc.createElement( "gml:lineStringMember" );
      QDomElement lineElem = createLineStringElem( lineGeom, doc );
      lineStringMemberElem.appendChild( lineElem );
      multiLineStringElem.appendChild( lineStringMemberElem );
    }
    delete lineGeom;
  }

  return multiLineStringElem;
}
开发者ID:mokerjoke,项目名称:Quantum-GIS,代码行数:26,代码来源:qgswfsserver.cpp

示例5: addFeature

void QgsDxfExport::addFeature( const QgsSymbolV2RenderContext& ctx, const QString& layer, const QgsSymbolLayerV2* symbolLayer, const QgsSymbolV2* symbol )
{
  const QgsFeature* fet = ctx.feature();
  if ( !fet )
  {
    return;
  }

  QgsGeometry* geom = fet->geometry();
  if ( geom )
  {
    int c = 0;
    if ( mSymbologyExport != NoSymbology )
    {
      c = colorFromSymbolLayer( symbolLayer, ctx );
    }
    double width = -1;
    if ( mSymbologyExport != NoSymbology && symbolLayer )
    {
      width = symbolLayer->dxfWidth( *this, ctx );
    }
    QString lineStyleName = "CONTINUOUS";
    if ( mSymbologyExport != NoSymbology )
    {
      lineStyleName = lineStyleFromSymbolLayer( symbolLayer );
    }
    QGis::WkbType geometryType = geom->wkbType();

    //single point
    if ( geometryType == QGis::WKBPoint || geometryType == QGis::WKBPoint25D )
    {
      writePoint( geom->asPoint(), layer, c, fet, symbolLayer, symbol );
    }

    //multipoint
    if ( geometryType == QGis::WKBMultiPoint || geometryType == QGis::WKBMultiPoint25D )
    {
      QgsMultiPoint multiPoint = geom->asMultiPoint();
      QgsMultiPoint::const_iterator it = multiPoint.constBegin();
      for ( ; it != multiPoint.constEnd(); ++it )
      {
        writePoint( *it, layer, c, fet, symbolLayer, symbol );
      }
    }

    //single line
    if ( geometryType == QGis::WKBLineString || geometryType == QGis::WKBLineString25D )
    {
      writePolyline( geom->asPolyline(), layer, lineStyleName, c, width, false );
    }

    //multiline
    if ( geometryType == QGis::WKBMultiLineString || geometryType == QGis::WKBMultiLineString25D )
    {
      QgsMultiPolyline multiLine = geom->asMultiPolyline();
      QgsMultiPolyline::const_iterator lIt = multiLine.constBegin();
      for ( ; lIt != multiLine.constEnd(); ++lIt )
      {
        writePolyline( *lIt, layer, lineStyleName, c, width, false );
      }
    }

    //polygon
    if ( geometryType == QGis::WKBPolygon || geometryType == QGis::WKBPolygon25D )
    {
      QgsPolygon polygon = geom->asPolygon();
      QgsPolygon::const_iterator polyIt = polygon.constBegin();
      for ( ; polyIt != polygon.constEnd(); ++polyIt ) //iterate over rings
      {
        writePolyline( *polyIt, layer, lineStyleName, c, width, true );
      }
    }

    //multipolygon or polygon
    if ( geometryType == QGis::WKBMultiPolygon || geometryType == QGis::WKBMultiPolygon25D )
    {
      QgsMultiPolygon mp = geom->asMultiPolygon();
      QgsMultiPolygon::const_iterator mpIt = mp.constBegin();
      for ( ; mpIt != mp.constEnd(); ++mpIt )
      {
        QgsPolygon::const_iterator polyIt = mpIt->constBegin();
        for ( ; polyIt != mpIt->constEnd(); ++polyIt )
        {
          writePolyline( *polyIt, layer, lineStyleName, c, width, true );
        }
      }
    }
  }
}
开发者ID:Aladar64,项目名称:QGIS,代码行数:89,代码来源:qgsdxfexport.cpp


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