Exemple #1
0
QgsCompoundCurve *QgsCompoundCurve::reversed() const
{
  QgsCompoundCurve *clone = new QgsCompoundCurve();
  for ( int i = mCurves.count() - 1; i >= 0; --i )
  {
    QgsCurve *reversedCurve = mCurves.at( i )->reversed();
    clone->addCurve( reversedCurve );
  }
  return clone;
}
void QgsMapToolAddCircularString::updateCenterPointRubberBand( const QgsPointV2 &pt )
{
  if ( !mShowCenterPointRubberBand || !mCenterPointRubberBand || mPoints.size() < 2 )
  {
    return;
  }

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

  //create circular string
  QgsCircularString *cs = new QgsCircularString();
  QgsPointSequence csPoints;
  csPoints.append( mPoints.at( mPoints.size() - 2 ) );
  csPoints.append( mPoints.at( mPoints.size() - 1 ) );
  csPoints.append( pt );
  cs->setPoints( csPoints );

  QgsPointV2 center;
  double radius;
  QgsGeometryUtils::circleCenterRadius( csPoints.at( 0 ), csPoints.at( 1 ), csPoints.at( 2 ), radius, center.rx(), center.ry() );

  QgsLineString *segment1 = new QgsLineString();
  segment1->addVertex( center );
  segment1->addVertex( csPoints.at( 0 ) );

  QgsLineString *segment2 = new QgsLineString();
  segment2->addVertex( csPoints.at( 2 ) );
  segment2->addVertex( center );

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

  QgsCurvePolygon *cp = new QgsCurvePolygon();
  cp->setExteriorRing( cc );
  mCenterPointRubberBand->setGeometry( cp );
  mCenterPointRubberBand->show();
}
Exemple #3
0
QgsCompoundCurve *QgsLineString::toCurveType() const
{
  QgsCompoundCurve *compoundCurve = new QgsCompoundCurve();
  compoundCurve->addCurve( clone() );
  return compoundCurve;
}