Esempi in C++ (Cpp) per QgsPoint::azimuth

Esempio n. 1

File: qgsregularpolygon.cpp Progetto: peterisb/QGIS

QgsRegularPolygon::QgsRegularPolygon( const QgsPoint &center, const QgsPoint &pt1, const int numSides, const ConstructionOption circle )
  : mCenter( center )
  , mFirstVertex( QgsPoint() )
  , mNumberSides( 0 )
  , mRadius( 0.0 )
{
  if ( numSides >= 3 )
  {
    mNumberSides = numSides;

    switch ( circle )
    {
      case InscribedCircle:
      {
        mFirstVertex = pt1;
        mRadius = center.distance( pt1 );
        break;
      }
      case CircumscribedCircle:
      {
        mRadius = apothemToRadius( center.distance( pt1 ), numSides );
        double azimuth = center.azimuth( pt1 );
        // TODO: inclination
        mFirstVertex = mCenter.project( mRadius, azimuth - centralAngle( numSides ) / 2 );
        break;
      }
      default:
        break;
    }

  }

}

Esempio n. 2

File: qgsregularpolygon.cpp Progetto: peterisb/QGIS

QgsRegularPolygon::QgsRegularPolygon( const QgsPoint &pt1, const QgsPoint &pt2, const int numSides )
  : mCenter( QgsPoint() )
  , mFirstVertex( QgsPoint() )
  , mNumberSides( 0 )
  , mRadius( 0.0 )
{
  if ( numSides >= 3 )
  {
    mNumberSides = numSides;

    double azimuth = pt1.azimuth( pt2 );
    QgsPoint pm = QgsGeometryUtils::midpoint( pt1, pt2 );
    double length = pt1.distance( pm );

    double angle = ( 180 - ( 360 / numSides ) ) / 2.0;
    double hypothenuse = length / cos( angle * M_PI / 180 );
    // TODO: inclination

    mCenter = pt1.project( hypothenuse, azimuth + angle );
    mFirstVertex = pt1;
    mRadius = qAbs( hypothenuse );
  }
}