C++ (Cpp) QgsTriangle Examples

Example #1

File: qgsregularpolygon.cpp Project: peterisb/QGIS

QgsTriangle QgsRegularPolygon::toTriangle() const
{
  if ( isEmpty() || ( mNumberSides != 3 ) )
  {
    return QgsTriangle();
  }

  QgsPointSequence pts;
  pts = points();

  return QgsTriangle( pts.at( 0 ), pts.at( 1 ), pts.at( 2 ) );
}

Example #2

File: qgstriangle.cpp Project: GeoCat/QGIS

QgsTriangle QgsTriangle::medial() const
{
  QgsPoint p1, p2, p3;
  p1 = QgsGeometryUtils::midpoint( vertexAt( 0 ), vertexAt( 1 ) );
  p2 = QgsGeometryUtils::midpoint( vertexAt( 1 ), vertexAt( 2 ) );
  p3 = QgsGeometryUtils::midpoint( vertexAt( 2 ), vertexAt( 0 ) );
  return QgsTriangle( p1, p2, p3 );
}

Example #3

File: qgscircle.cpp Project: ndavid/QGIS

QgsCircle QgsCircle::from3Tangents( const QgsPoint &pt1_tg1, const QgsPoint &pt2_tg1, const QgsPoint &pt1_tg2, const QgsPoint &pt2_tg2, const QgsPoint &pt1_tg3, const QgsPoint &pt2_tg3, double epsilon )
{
  QgsPoint p1, p2, p3;
  QgsGeometryUtils::segmentIntersection( pt1_tg1, pt2_tg1, pt1_tg2, pt2_tg2, p1, epsilon );
  QgsGeometryUtils::segmentIntersection( pt1_tg1, pt2_tg1, pt1_tg3, pt2_tg3, p2, epsilon );
  QgsGeometryUtils::segmentIntersection( pt1_tg2, pt2_tg2, pt1_tg3, pt2_tg3, p3, epsilon );

  return QgsTriangle( p1, p2, p3 ).inscribedCircle();
}

Example #4

File: qgsregularpolygon.cpp Project: peterisb/QGIS

QList<QgsTriangle> QgsRegularPolygon::triangulate() const
{
  QList<QgsTriangle> l_tri;
  if ( isEmpty() )
  {
    return l_tri;
  }

  QgsPointSequence pts;
  pts = points();

  unsigned int n = 0;
  while ( n < mNumberSides - 1 )
  {
    l_tri.append( QgsTriangle( pts.at( n ), pts.at( n + 1 ), mCenter ) );
    n++;
  }
  l_tri.append( QgsTriangle( pts.at( n ), pts.at( 0 ), mCenter ) );

  return l_tri;
}