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C++ QgsPointV2函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了C++中QgsPointV2函数的典型用法代码示例。如果您正苦于以下问题:C++ QgsPointV2函数的具体用法?C++ QgsPointV2怎么用?C++ QgsPointV2使用的例子?那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。



在下文中一共展示了QgsPointV2函数的19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,您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: numPoints

QgsRectangle QgsCircularString::calculateBoundingBox() const
{
  QgsRectangle bbox;
  int nPoints = numPoints();
  for ( int i = 0; i < ( nPoints - 2 ) ; i += 2 )
  {
    if ( i == 0 )
    {
      bbox = segmentBoundingBox( QgsPointV2( mX[i], mY[i] ), QgsPointV2( mX[i + 1], mY[i + 1] ), QgsPointV2( mX[i + 2], mY[i + 2] ) );
    }
    else
    {
      QgsRectangle segmentBox = segmentBoundingBox( QgsPointV2( mX[i], mY[i] ), QgsPointV2( mX[i + 1], mY[i + 1] ), QgsPointV2( mX[i + 2], mY[i + 2] ) );
      bbox.combineExtentWith( segmentBox );
    }
  }

  if ( nPoints > 0 && nPoints % 2 == 0 )
  {
    if ( nPoints == 2 )
    {
      bbox.combineExtentWith( mX[ 0 ], mY[ 0 ] );
    }
    bbox.combineExtentWith( mX[ nPoints - 1 ], mY[ nPoints - 1 ] );
  }
  return bbox;
}
开发者ID:cayetanobv,项目名称:QGIS,代码行数:27,代码来源:qgscircularstring.cpp


示例2: toMapCoordinates

void QgsMapToolAddCircularString::activate()
{
  if ( mParentTool )
  {
    mParentTool->deleteTempRubberBand();
    if ( mPoints.isEmpty() )
    {
      // if the parent tool has a curve, use its last point as the first point in this curve
      const QgsCompoundCurveV2* compoundCurve = mParentTool->captureCurve();
      if ( compoundCurve && compoundCurve->nCurves() > 0 )
      {
        const QgsCurveV2* curve = compoundCurve->curveAt( compoundCurve->nCurves() - 1 );
        if ( curve )
        {
          //mParentTool->captureCurve() is in layer coordinates, but we need map coordinates
          QgsPointV2 endPointLayerCoord = curve->endPoint();
          QgsPoint mapPoint = toMapCoordinates( mCanvas->currentLayer(), QgsPoint( endPointLayerCoord.x(), endPointLayerCoord.y() ) );
          mPoints.append( QgsPointV2( mapPoint ) );
          if ( !mTempRubberBand )
          {
            mTempRubberBand = createGeometryRubberBand(( mode() == CapturePolygon ) ? Qgis::Polygon : Qgis::Line, true );
            mTempRubberBand->show();
          }
          QgsCircularStringV2* c = new QgsCircularStringV2();
          QgsPointSequenceV2 rubberBandPoints = mPoints;
          rubberBandPoints.append( QgsPointV2( mapPoint ) );
          c->setPoints( rubberBandPoints );
          mTempRubberBand->setGeometry( c );
        }
      }
    }
  }
  QgsMapToolCapture::activate();
}
开发者ID:Zakui,项目名称:QGIS,代码行数:34,代码来源:qgsmaptooladdcircularstring.cpp


示例3: QgsLineString

void TestQgsGeometryUtils::testDistanceToVertex()
{
    //test with linestring
    QgsLineString* outerRing1 = new QgsLineString();
    outerRing1->setPoints( QList<QgsPointV2>() << QgsPointV2( 1, 1 ) << QgsPointV2( 1, 2 ) << QgsPointV2( 2, 2 ) << QgsPointV2( 2, 1 ) << QgsPointV2( 1, 1 ) );
    QCOMPARE( QgsGeometryUtils::distanceToVertex( *outerRing1, QgsVertexId( 0, 0, 0 ) ), 0.0 );
    QCOMPARE( QgsGeometryUtils::distanceToVertex( *outerRing1, QgsVertexId( 0, 0, 1 ) ), 1.0 );
    QCOMPARE( QgsGeometryUtils::distanceToVertex( *outerRing1, QgsVertexId( 0, 0, 2 ) ), 2.0 );
    QCOMPARE( QgsGeometryUtils::distanceToVertex( *outerRing1, QgsVertexId( 0, 0, 3 ) ), 3.0 );
    QCOMPARE( QgsGeometryUtils::distanceToVertex( *outerRing1, QgsVertexId( 0, 0, 4 ) ), 4.0 );
    QCOMPARE( QgsGeometryUtils::distanceToVertex( *outerRing1, QgsVertexId( 0, 0, 5 ) ), -1.0 );
    QCOMPARE( QgsGeometryUtils::distanceToVertex( *outerRing1, QgsVertexId( 0, 1, 1 ) ), -1.0 );

    //test with polygon
    QgsPolygonV2 polygon1;
    polygon1.setExteriorRing( outerRing1 );
    QCOMPARE( QgsGeometryUtils::distanceToVertex( polygon1, QgsVertexId( 0, 0, 0 ) ), 0.0 );
    QCOMPARE( QgsGeometryUtils::distanceToVertex( polygon1, QgsVertexId( 0, 0, 1 ) ), 1.0 );
    QCOMPARE( QgsGeometryUtils::distanceToVertex( polygon1, QgsVertexId( 0, 0, 2 ) ), 2.0 );
    QCOMPARE( QgsGeometryUtils::distanceToVertex( polygon1, QgsVertexId( 0, 0, 3 ) ), 3.0 );
    QCOMPARE( QgsGeometryUtils::distanceToVertex( polygon1, QgsVertexId( 0, 0, 4 ) ), 4.0 );
    QCOMPARE( QgsGeometryUtils::distanceToVertex( polygon1, QgsVertexId( 0, 0, 5 ) ), -1.0 );
    QCOMPARE( QgsGeometryUtils::distanceToVertex( polygon1, QgsVertexId( 0, 1, 1 ) ), -1.0 );

    //test with point
    QgsPointV2 point( 1, 2 );
    QCOMPARE( QgsGeometryUtils::distanceToVertex( point, QgsVertexId( 0, 0, 0 ) ), 0.0 );
    QCOMPARE( QgsGeometryUtils::distanceToVertex( point, QgsVertexId( 0, 0, 1 ) ), -1.0 );
}
开发者ID:Gustry,项目名称:QGIS,代码行数:29,代码来源:testqgsgeometryutils.cpp


示例4: QgsPointV2

void QgsMapToolCircularStringRadius::recalculateTempRubberBand( const QgsPoint& mousePosition )
{
  QList<QgsPointV2> rubberBandPoints;
  if ( !( mPoints.size() % 2 ) )
  {
    //recalculate midpoint on circle segment
    QgsPointV2 midPoint;
    if ( !QgsGeometryUtils::segmentMidPoint( mPoints.at( mPoints.size() - 2 ), mTemporaryEndPoint, midPoint, mRadius,
         QgsPointV2( mousePosition ) ) )
    {
      return;
    }
    mPoints.replace( mPoints.size() - 1, midPoint );
    rubberBandPoints.append( mPoints.at( mPoints.size() - 2 ) );
    rubberBandPoints.append( mPoints.last() );
    rubberBandPoints.append( mTemporaryEndPoint );
  }
  else
  {
    rubberBandPoints.append( mPoints.last() );
    rubberBandPoints.append( QgsPointV2( mousePosition ) );
  }
  QgsCircularStringV2* cString = new QgsCircularStringV2();
  cString->setPoints( rubberBandPoints );
  delete mTempRubberBand;
  mTempRubberBand = createGeometryRubberBand(( mode() == CapturePolygon ) ? QGis::Polygon : QGis::Line, true );
  mTempRubberBand->setGeometry( cString );
  mTempRubberBand->show();
}
开发者ID:Naisha634,项目名称:QGIS,代码行数:29,代码来源:qgsmaptoolcircularstringradius.cpp


示例5: QgsPointV2

void QgsCircularString::insertVertexBetween( int after, int before, int pointOnCircle )
{
  double xAfter = mX.at( after );
  double yAfter = mY.at( after );
  double xBefore = mX.at( before );
  double yBefore = mY.at( before );
  double xOnCircle = mX.at( pointOnCircle );
  double yOnCircle = mY.at( pointOnCircle );

  double radius, centerX, centerY;
  QgsGeometryUtils::circleCenterRadius( QgsPointV2( xAfter, yAfter ), QgsPointV2( xBefore, yBefore ), QgsPointV2( xOnCircle, yOnCircle ), radius, centerX, centerY );

  double x = ( xAfter + xBefore ) / 2.0;
  double y = ( yAfter + yBefore ) / 2.0;

  QgsPointV2 newVertex = QgsGeometryUtils::pointOnLineWithDistance( QgsPointV2( centerX, centerY ), QgsPointV2( x, y ), radius );
  mX.insert( before, newVertex.x() );
  mY.insert( before, newVertex.y() );

  if ( is3D() )
  {
    mZ.insert( before, ( mZ[after] + mZ[before] ) / 2.0 );
  }
  if ( isMeasure() )
  {
    mM.insert( before, ( mM[after] + mM[before] ) / 2.0 );
  }
  clearCache();
}
开发者ID:cayetanobv,项目名称:QGIS,代码行数:29,代码来源:qgscircularstring.cpp


示例6: circleCenterRadius

double QgsGeometryUtils::circleLength( double x1, double y1, double x2, double y2, double x3, double y3 )
{
  double centerX, centerY, radius;
  circleCenterRadius( QgsPointV2( x1, y1 ), QgsPointV2( x2, y2 ), QgsPointV2( x3, y3 ), radius, centerX, centerY );
  double length = M_PI / 180.0 * radius * sweepAngle( centerX, centerY, x1, y1, x2, y2, x3, y3 );
  if ( length < 0 )
  {
    length = -length;
  }
  return length;
}
开发者ID:spatialthoughts,项目名称:QGIS,代码行数:11,代码来源:qgsgeometryutils.cpp


示例7: QgsMapToolAddCircularString

QgsMapToolCircularStringRadius::QgsMapToolCircularStringRadius( QgsMapToolCapture* parentTool, QgsMapCanvas* canvas, CaptureMode mode )
    : QgsMapToolAddCircularString( parentTool, canvas, mode ),
    mTemporaryEndPoint( QgsPointV2() ),
    mRadius( 0.0 ),
    mRadiusSpinBox( nullptr )
{

}
开发者ID:Naisha634,项目名称:QGIS,代码行数:8,代码来源:qgsmaptoolcircularstringradius.cpp


示例8: vertexCount

QgsPointV2 QgsAbstractGeometryV2::centroid() const
{
    // http://en.wikipedia.org/wiki/Centroid#Centroid_of_polygon
    // Pick the first ring of first part for the moment

    int n = vertexCount( 0, 0 );
    if ( n == 1 )
    {
        return vertexAt( QgsVertexId( 0, 0, 0 ) );
    }

    double A = 0.;
    double Cx = 0.;
    double Cy = 0.;
    int i = 0, j = 1;
    if ( vertexAt( QgsVertexId( 0, 0, 0 ) ) != vertexAt( QgsVertexId( 0, 0, n - 1 ) ) )
    {
        i = n - 1;
        j = 0;
    }
    for ( ; j < n; i = j++ )
    {
        QgsPointV2 vi = vertexAt( QgsVertexId( 0, 0, i ) );
        QgsPointV2 vj = vertexAt( QgsVertexId( 0, 0, j ) );
        double d = vi.x() * vj.y() - vj.x() * vi.y();
        A += d;
        Cx += ( vi.x() + vj.x() ) * d;
        Cy += ( vi.y() + vj.y() ) * d;
    }

    if ( A < 1E-12 )
    {
        Cx = Cy = 0.;
        for ( int i = 0; i < n - 1; ++i )
        {
            QgsPointV2 vi = vertexAt( QgsVertexId( 0, 0, i ) );
            Cx += vi.x();
            Cy += vi.y();
        }
        return QgsPointV2( Cx / ( n - 1 ), Cy / ( n - 1 ) );
    }
    else
    {
        return QgsPointV2( Cx / ( 3. * A ), Cy / ( 3. * A ) );
    }
}
开发者ID:nicanor-b,项目名称:QGIS,代码行数:46,代码来源:qgsabstractgeometryv2.cpp


示例9: QgsPointV2

QgsPointV2 QgsLineStringV2::endPoint() const
{
  if ( numPoints() < 1 )
  {
    return QgsPointV2();
  }
  return pointN( numPoints() - 1 );
}
开发者ID:saberraz,项目名称:QGIS,代码行数:8,代码来源:qgslinestringv2.cpp


示例10: p

bool QgsNodeEditorModel::setData( const QModelIndex& index, const QVariant& value, int role )
{
  if ( !index.isValid() || role != Qt::EditRole )
  {
    return false;
  }
  if ( index.row() >= mSelectedFeature->vertexMap().count() )
  {
    return false;
  }

  double x = ( index.column() == 0 ? value.toDouble() : mSelectedFeature->vertexMap().at( index.row() )->point().x() );
  double y = ( index.column() == 1 ? value.toDouble() : mSelectedFeature->vertexMap().at( index.row() )->point().y() );

  if ( index.column() == mRCol ) // radius modified
  {
    if ( index.row() == 0 || index.row() >= mSelectedFeature->vertexMap().count() - 1 )
      return false;

    double r = value.toDouble();
    double x1 = mSelectedFeature->vertexMap().at( index.row() - 1 )->point().x();
    double y1 = mSelectedFeature->vertexMap().at( index.row() - 1 )->point().y();
    double x2 = x;
    double y2 = y;
    double x3 = mSelectedFeature->vertexMap().at( index.row() + 1 )->point().x();
    double y3 = mSelectedFeature->vertexMap().at( index.row() + 1 )->point().y();

    QgsPointV2 result;
    if ( QgsGeometryUtils::segmentMidPoint( QgsPointV2( x1, y1 ), QgsPointV2( x3, y3 ), result, r, QgsPointV2( x2, y2 ) ) )
    {
      x = result.x();
      y = result.y();
    }
  }
  double z = ( index.column() == mZCol ? value.toDouble() : mSelectedFeature->vertexMap().at( index.row() )->point().z() );
  double m = ( index.column() == mMCol ? value.toDouble() : mSelectedFeature->vertexMap().at( index.row() )->point().m() );
  QgsPointV2 p( QgsWkbTypes::PointZM, x, y, z, m );

  mLayer->beginEditCommand( QObject::tr( "Moved vertices" ) );
  mLayer->moveVertex( p, mSelectedFeature->featureId(), index.row() );
  mLayer->endEditCommand();
  mLayer->triggerRepaint();

  return false;
}
开发者ID:3liz,项目名称:Quantum-GIS,代码行数:45,代码来源:qgsnodeeditor.cpp


示例11: QgsPointV2

int QgsVectorLayerEditUtils::addPart( const QList<QgsPoint> &points, QgsFeatureId featureId )
{
    QgsPointSequenceV2 l;
    for ( QList<QgsPoint>::const_iterator it = points.constBegin(); it != points.constEnd(); ++it )
    {
        l <<  QgsPointV2( *it );
    }
    return addPart( l, featureId );
}
开发者ID:Zakui,项目名称:QGIS,代码行数:9,代码来源:qgsvectorlayereditutils.cpp


示例12: QFETCH

void TestQgsGeometryUtils::testCircleCenterRadius()
{
    QFETCH( double, x1 );
    QFETCH( double, y1 );
    QFETCH( double, x2 );
    QFETCH( double, y2 );
    QFETCH( double, x3 );
    QFETCH( double, y3 );
    QFETCH( double, expectedRadius );
    QFETCH( double, expectedCenterX );
    QFETCH( double, expectedCenterY );

    double radius, centerX, centerY;
    QgsGeometryUtils::circleCenterRadius( QgsPointV2( x1, y1 ), QgsPointV2( x2, y2 ), QgsPointV2( x3, y3 ), radius, centerX, centerY );
    QVERIFY( qgsDoubleNear( expectedRadius, radius ) );
    QVERIFY( qgsDoubleNear( expectedCenterX, centerX ) );
    QVERIFY( qgsDoubleNear( expectedCenterY, centerY ) );
}
开发者ID:Gustry,项目名称:QGIS,代码行数:18,代码来源:testqgsgeometryutils.cpp


示例13: QgsCircularStringV2

void QgsMapToolAddCircularString::updateCenterPointRubberBand( const QgsPointV2& pt )
{
  if ( !mShowCenterPointRubberBand || !mCenterPointRubberBand || mPoints.size() < 2 )
  {
    return;
  }

  if (( mPoints.size() ) % 2 != 0 )
  {
    return;
  }

  //create circular string
  QgsCircularStringV2* cs = new QgsCircularStringV2();
  QList< QgsPointV2 > csPoints;
  csPoints.append( mPoints.at( mPoints.size() - 2 ) );
  csPoints.append( mPoints.at( mPoints.size() - 1 ) );
  csPoints.append( pt );
  cs->setPoints( csPoints );

  double centerX, centerY;
  double radius;
  QgsGeometryUtils::circleCenterRadius( csPoints.at( 0 ), csPoints.at( 1 ), csPoints.at( 2 ), radius, centerX, centerY );

  QgsLineStringV2* segment1 = new QgsLineStringV2();
  segment1->addVertex( QgsPointV2( centerX, centerY ) );
  segment1->addVertex( csPoints.at( 0 ) );

  QgsLineStringV2* segment2 = new QgsLineStringV2();
  segment2->addVertex( csPoints.at( 2 ) );
  segment2->addVertex( QgsPointV2( centerX, centerY ) );

  QgsCompoundCurveV2* cc = new QgsCompoundCurveV2();
  cc->addCurve( segment1 );
  cc->addCurve( cs );
  cc->addCurve( segment2 );

  QgsCurvePolygonV2* cp = new QgsCurvePolygonV2();
  cp->setExteriorRing( cc );
  mCenterPointRubberBand->setGeometry( cp );
  mCenterPointRubberBand->show();
}
开发者ID:chhao91,项目名称:QGIS,代码行数:42,代码来源:qgsmaptooladdcircularstring.cpp


示例14: midPoint

bool QgsGeometryUtils::segmentMidPoint( const QgsPointV2& p1, const QgsPointV2& p2, QgsPointV2& result, double radius, const QgsPointV2& mousePos )
{
  QgsPointV2 midPoint(( p1.x() + p2.x() ) / 2.0, ( p1.y() + p2.y() ) / 2.0 );
  double midDist = sqrt( sqrDistance2D( p1, midPoint ) );
  if ( radius < midDist )
  {
    return false;
  }
  double centerMidDist = sqrt( radius * radius - midDist * midDist );
  double dist = radius - centerMidDist;

  double midDx = midPoint.x() - p1.x();
  double midDy = midPoint.y() - p1.y();

  //get the four possible midpoints
  QList<QgsPointV2> possibleMidPoints;
  possibleMidPoints.append( pointOnLineWithDistance( midPoint, QgsPointV2( midPoint.x() - midDy, midPoint.y() + midDx ), dist ) );
  possibleMidPoints.append( pointOnLineWithDistance( midPoint, QgsPointV2( midPoint.x() - midDy, midPoint.y() + midDx ), 2 * radius - dist ) );
  possibleMidPoints.append( pointOnLineWithDistance( midPoint, QgsPointV2( midPoint.x() + midDy, midPoint.y() - midDx ), dist ) );
  possibleMidPoints.append( pointOnLineWithDistance( midPoint, QgsPointV2( midPoint.x() + midDy, midPoint.y() - midDx ), 2 * radius - dist ) );

  //take the closest one
  double minDist = std::numeric_limits<double>::max();
  int minDistIndex = -1;
  for ( int i = 0; i < possibleMidPoints.size(); ++i )
  {
    double currentDist = sqrDistance2D( mousePos, possibleMidPoints.at( i ) );
    if ( currentDist < minDist )
    {
      minDistIndex = i;
      minDist = currentDist;
    }
  }

  if ( minDistIndex == -1 )
  {
    return false;
  }

  result = possibleMidPoints.at( minDistIndex );
  return true;
}
开发者ID:spatialthoughts,项目名称:QGIS,代码行数:42,代码来源:qgsgeometryutils.cpp


示例15: QgsLineStringV2

int QgsVectorLayerEditUtils::addRing( const QList<QgsPoint>& ring, const QgsFeatureIds& targetFeatureIds, QgsFeatureId* modifiedFeatureId )
{
  QgsLineStringV2* ringLine = new QgsLineStringV2();
  QList< QgsPointV2 > ringPoints;
  QList<QgsPoint>::const_iterator ringIt = ring.constBegin();
  for ( ; ringIt != ring.constEnd(); ++ringIt )
  {
    ringPoints.append( QgsPointV2( ringIt->x(), ringIt->y() ) );
  }
  ringLine->setPoints( ringPoints );
  return addRing( ringLine, targetFeatureIds,  modifiedFeatureId );
}
开发者ID:rotulet,项目名称:QGIS,代码行数:12,代码来源:qgsvectorlayereditutils.cpp


示例16: lengths

QgsPointV2 QgsTriangle::inscribedCenter() const
{

  QVector<double> l = lengths();
  double x = ( l.at( 0 ) * vertexAt( 2 ).x() +
               l.at( 1 ) * vertexAt( 0 ).x() +
               l.at( 2 ) * vertexAt( 1 ).x() ) / perimeter();
  double y = ( l.at( 0 ) * vertexAt( 2 ).y() +
               l.at( 1 ) * vertexAt( 0 ).y() +
               l.at( 2 ) * vertexAt( 1 ).y() ) / perimeter();

  return QgsPointV2( x, y );
}
开发者ID:cayetanobv,项目名称:QGIS,代码行数:13,代码来源:qgstriangle.cpp


示例17: QgsLineStringV2

QgsLineStringV2* QgsGeometryImport::linestringFromPolyline( const QgsPolyline& polyline )
{
  QgsLineStringV2* line = new QgsLineStringV2();

  QList<QgsPointV2> points;
  QgsPolyline::const_iterator it = polyline.constBegin();
  for ( ; it != polyline.constEnd(); ++it )
  {
    points.append( QgsPointV2( it->x(), it->y() ) );
  }
  line->setPoints( points );
  return line;
}
开发者ID:Br1ndavoine,项目名称:QGIS,代码行数:13,代码来源:qgsgeometryimport.cpp


示例18: QgsPointV2

bool QgsSnapIndex::SegmentSnapItem::getProjection( const QgsPointV2 &p, QgsPointV2 &pProj )
{
    const QgsPointV2& s1 = idxFrom->point();
    const QgsPointV2& s2 = idxTo->point();
    double nx = s2.y() - s1.y();
    double ny = -( s2.x() - s1.x() );
    double t = ( p.x() * ny - p.y() * nx - s1.x() * ny + s1.y() * nx ) / (( s2.x() - s1.x() ) * ny - ( s2.y() - s1.y() ) * nx );
    if ( t < 0. || t > 1. )
    {
        return false;
    }
    pProj = QgsPointV2( s1.x() + ( s2.x() - s1.x() ) * t, s1.y() + ( s2.y() - s1.y() ) * t );
    return true;
}
开发者ID:rhurlin,项目名称:QGIS,代码行数:14,代码来源:qgssnapindex.cpp


示例19: sqrt

QgsPointV2 QgsGeometryUtils::pointOnLineWithDistance( const QgsPointV2& startPoint, const QgsPointV2& directionPoint, double distance )
{
  double dx = directionPoint.x() - startPoint.x();
  double dy = directionPoint.y() - startPoint.y();
  double length = sqrt( dx * dx + dy * dy );

  if ( qgsDoubleNear( length, 0.0 ) )
  {
    return startPoint;
  }

  double scaleFactor = distance / length;
  return QgsPointV2( startPoint.x() + dx * scaleFactor, startPoint.y() + dy * scaleFactor );
}
开发者ID:spatialthoughts,项目名称:QGIS,代码行数:14,代码来源:qgsgeometryutils.cpp



注:本文中的QgsPointV2函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。


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