bool QgsTriangle::moveVertex( QgsVertexId vId, const QgsPoint &newPos )
{
if ( !mExteriorRing || vId.part != 0 || vId.ring != 0 || vId.vertex < 0 || vId.vertex > 4 )
{
return false;
}
if ( vId.vertex == 4 )
{
vId.vertex = 0;
}
QgsPoint p1( vId.vertex == 0 ? newPos : vertexAt( 0 ) );
QgsPoint p2( vId.vertex == 1 ? newPos : vertexAt( 1 ) );
QgsPoint p3( vId.vertex == 2 ? newPos : vertexAt( 2 ) );
if ( !validateGeom( p1, p2, p3 ) )
{
return false;
}
int n = mExteriorRing->numPoints();
bool success = mExteriorRing->moveVertex( vId, newPos );
if ( success )
{
// If first or last vertex is moved, also move the last/first vertex
if ( vId.vertex == 0 )
mExteriorRing->moveVertex( QgsVertexId( vId.part, vId.ring, n - 1 ), newPos );
clearCache();
}
return success;
}
void QgsTriangle::setExteriorRing( QgsCurve *ring )
{
if ( !ring )
{
return;
}
if ( ring->hasCurvedSegments() )
{
//need to segmentize ring as polygon does not support curves
QgsCurve *line = ring->segmentize();
delete ring;
ring = line;
}
if ( ( ring->numPoints() > 4 ) || ( ring->numPoints() < 3 ) )
{
delete ring;
return;
}
else if ( ring->numPoints() == 4 )
{
if ( !ring->isClosed() )
{
delete ring;
return;
}
}
else if ( ring->numPoints() == 3 )
{
if ( ring->isClosed() )
{
delete ring;
return;
}
QgsLineString *lineString = static_cast< QgsLineString *>( ring );
if ( !lineString->isClosed() )
{
lineString->close();
}
ring = lineString;
}
if ( !validateGeom( ring->vertexAt( QgsVertexId( 0, 0, 0 ) ), ring->vertexAt( QgsVertexId( 0, 0, 1 ) ), ring->vertexAt( QgsVertexId( 0, 0, 2 ) ) ) )
{
delete ring;
return;
}
mExteriorRing.reset( ring );
//set proper wkb type
setZMTypeFromSubGeometry( ring, QgsWkbTypes::Triangle );
clearCache();
}
QgsTriangle::QgsTriangle( const QgsPoint &p1, const QgsPoint &p2, const QgsPoint &p3 )
{
mWkbType = QgsWkbTypes::Triangle;
if ( !validateGeom( p1, p2, p3 ) )
{
return;
}
QVector< double > x;
x << p1.x() << p2.x() << p3.x();
QVector< double > y;
y << p1.y() << p2.y() << p3.y();
QgsLineString *ext = new QgsLineString( x, y );
setExteriorRing( ext );
}
QgsTriangle::QgsTriangle( const QPointF p1, const QPointF p2, const QPointF p3 )
: QgsPolygonV2()
{
mWkbType = QgsWkbTypes::Triangle;
QgsPointV2 pt1( p1 );
QgsPointV2 pt2( p2 );
QgsPointV2 pt3( p3 );
if ( !validateGeom( pt1, pt2, pt3 ) )
{
return;
}
QVector< double > x;
x << p1.x() << p2.x() << p3.x();
QVector< double > y;
y << p1.y() << p2.y() << p3.y();
QgsLineString *ext = new QgsLineString( x, y );
setExteriorRing( ext );
}