bool QgsCircularString::insertVertex( QgsVertexId position, const QgsPointV2 &vertex )
{
if ( position.vertex > mX.size() || position.vertex < 1 )
{
return false;
}
mX.insert( position.vertex, vertex.x() );
mY.insert( position.vertex, vertex.y() );
if ( is3D() )
{
mZ.insert( position.vertex, vertex.z() );
}
if ( isMeasure() )
{
mM.insert( position.vertex, vertex.m() );
}
bool vertexNrEven = ( position.vertex % 2 == 0 );
if ( vertexNrEven )
{
insertVertexBetween( position.vertex - 2, position.vertex - 1, position.vertex );
}
else
{
insertVertexBetween( position.vertex, position.vertex + 1, position.vertex - 1 );
}
clearCache(); //set bounding box invalid
return true;
}
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();
}
void QgsMapToolIdentify::closestVertexAttributes( const QgsAbstractGeometry& geometry, QgsVertexId vId, QgsMapLayer *layer, QMap< QString, QString >& derivedAttributes )
{
QString str = QLocale::system().toString( vId.vertex + 1 );
derivedAttributes.insert( tr( "Closest vertex number" ), str );
QgsPointV2 closestPoint = geometry.vertexAt( vId );
QgsPoint closestPointMapCoords = mCanvas->mapSettings().layerToMapCoordinates( layer, QgsPoint( closestPoint.x(), closestPoint.y() ) );
derivedAttributes.insert( "Closest vertex X", formatXCoordinate( closestPointMapCoords ) );
derivedAttributes.insert( "Closest vertex Y", formatYCoordinate( closestPointMapCoords ) );
if ( closestPoint.is3D() )
{
str = QLocale::system().toString( closestPoint.z(), 'g', 10 );
derivedAttributes.insert( "Closest vertex Z", str );
}
if ( closestPoint.isMeasure() )
{
str = QLocale::system().toString( closestPoint.m(), 'g', 10 );
derivedAttributes.insert( "Closest vertex M", str );
}
if ( vId.type == QgsVertexId::CurveVertex )
{
double radius, centerX, centerY;
QgsVertexId vIdBefore = vId;
--vIdBefore.vertex;
QgsVertexId vIdAfter = vId;
++vIdAfter.vertex;
QgsGeometryUtils::circleCenterRadius( geometry.vertexAt( vIdBefore ), geometry.vertexAt( vId ),
geometry.vertexAt( vIdAfter ), radius, centerX, centerY );
derivedAttributes.insert( "Closest vertex radius", QLocale::system().toString( radius ) );
}
}
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();
}
void QgsMapToolCapture::canvasMapMoveEvent( QgsMapMouseEvent * e )
{
bool snapped = e->isSnapped();
QgsPoint point = e->mapPoint();
if ( !snapped )
{
delete mSnappingMarker;
mSnappingMarker = 0;
}
else
{
if ( !mSnappingMarker )
{
mSnappingMarker = new QgsVertexMarker( mCanvas );
mSnappingMarker->setIconType( QgsVertexMarker::ICON_CROSS );
mSnappingMarker->setColor( Qt::magenta );
mSnappingMarker->setPenWidth( 3 );
}
mSnappingMarker->setCenter( point );
}
if ( !mTempRubberBand && mCaptureCurve.numPoints() > 0 )
{
mTempRubberBand = createRubberBand( mCaptureMode == CapturePolygon ? QGis::Polygon : QGis::Line, true );
QgsPointV2 pt = mCaptureCurve.endPoint();
mTempRubberBand->addPoint( QgsPoint( pt.x(), pt.y() ) );
mTempRubberBand->addPoint( point );
}
if ( mCaptureMode != CapturePoint && mTempRubberBand && mCapturing )
{
mTempRubberBand->movePoint( point );
}
} // mouseMoveEvent
bool QgsLineStringV2::insertVertex( const QgsVertexId& position, const QgsPointV2& vertex )
{
if ( position.vertex < 0 || position.vertex > mX.size() )
{
return false;
}
if ( mWkbType == QgsWKBTypes::Unknown || mX.isEmpty() )
{
setZMTypeFromSubGeometry( &vertex, QgsWKBTypes::LineString );
}
mX.insert( position.vertex, vertex.x() );
mY.insert( position.vertex, vertex.y() );
if ( is3D() )
{
mZ.insert( position.vertex, vertex.z() );
}
if ( isMeasure() )
{
mM.insert( position.vertex, vertex.m() );
}
mBoundingBox = QgsRectangle(); //set bounding box invalid
return true;
}
QgsRectangle QgsAbstractGeometry::calculateBoundingBox() const
{
double xmin = std::numeric_limits<double>::max();
double ymin = std::numeric_limits<double>::max();
double xmax = -std::numeric_limits<double>::max();
double ymax = -std::numeric_limits<double>::max();
QgsVertexId id;
QgsPointV2 vertex;
double x, y;
while ( nextVertex( id, vertex ) )
{
x = vertex.x();
y = vertex.y();
if ( x < xmin )
xmin = x;
if ( x > xmax )
xmax = x;
if ( y < ymin )
ymin = y;
if ( y > ymax )
ymax = y;
}
return QgsRectangle( xmin, ymin, xmax, ymax );
}
double QgsLineStringV2::closestSegment( const QgsPointV2& pt, QgsPointV2& segmentPt, QgsVertexId& vertexAfter, bool* leftOf, double epsilon ) const
{
double sqrDist = std::numeric_limits<double>::max();
double testDist = 0;
double segmentPtX, segmentPtY;
int size = mCoords.size();
for ( int i = 1; i < size; ++i )
{
const QPointF& prev = mCoords.at( i - 1 );
const QPointF& currentPt = mCoords.at( i );
testDist = QgsGeometryUtils::sqrDistToLine( pt.x(), pt.y(), prev.x(), prev.y(), currentPt.x(), currentPt.y(), segmentPtX, segmentPtY, epsilon );
if ( testDist < sqrDist )
{
sqrDist = testDist;
segmentPt.setX( segmentPtX );
segmentPt.setY( segmentPtY );
if ( leftOf )
{
*leftOf = ( QgsGeometryUtils::leftOfLine( segmentPtX, segmentPtY, prev.x(), prev.y(), pt.x(), pt.y() ) < 0 );
}
vertexAfter.part = 0; vertexAfter.ring = 0; vertexAfter.vertex = i;
}
}
return sqrDist;
}
void QgsSelectedFeature::moveSelectedVertexes( QgsVector v )
{
int nUpdates = 0;
Q_FOREACH ( QgsVertexEntry *entry, mVertexMap )
{
if ( entry->isSelected() )
nUpdates++;
}
if ( nUpdates == 0 )
return;
mVlayer->beginEditCommand( QObject::tr( "Moved vertices" ) );
int topologicalEditing = QgsProject::instance()->readNumEntry( "Digitizing", "/TopologicalEditing", 0 );
beginGeometryChange();
QMultiMap<double, QgsSnappingResult> currentResultList;
for ( int i = mVertexMap.size() - 1; i > -1 && nUpdates > 0; i-- )
{
QgsVertexEntry *entry = mVertexMap.value( i, nullptr );
if ( !entry || !entry->isSelected() )
continue;
if ( topologicalEditing )
{
// snap from current vertex
currentResultList.clear();
mVlayer->snapWithContext( entry->pointV1(), ZERO_TOLERANCE, currentResultList, QgsSnapper::SnapToVertex );
}
// only last update should trigger the geometry update
// as vertex selection gets lost on the update
if ( --nUpdates == 0 )
endGeometryChange();
QgsPointV2 p = entry->point();
p.setX( p.x() + v.x() );
p.setY( p.y() + v.y() );
mVlayer->moveVertex( p, mFeatureId, i );
if ( topologicalEditing )
{
QMultiMap<double, QgsSnappingResult>::iterator resultIt = currentResultList.begin();
for ( ; resultIt != currentResultList.end(); ++resultIt )
{
// move all other
if ( mFeatureId != resultIt.value().snappedAtGeometry )
mVlayer->moveVertex( p, resultIt.value().snappedAtGeometry, resultIt.value().snappedVertexNr );
}
}
}
if ( nUpdates > 0 )
endGeometryChange();
mVlayer->endEditCommand();
}
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;
}
void QgsLineStringV2::addVertex( const QgsPointV2& pt )
{
if ( mWkbType == QgsWKBTypes::Unknown )
{
setZMTypeFromSubGeometry( &pt, QgsWKBTypes::LineString );
}
mCoords.append( QPointF( pt.x(), pt.y() ) );
if ( is3D() )
{
mZ.append( pt.z() );
}
if ( isMeasure() )
{
mM.append( pt.m() );
}
}
bool QgsLineStringV2::insertVertex( const QgsVertexId& position, const QgsPointV2& vertex )
{
if ( position.vertex < 0 || position.vertex > mCoords.size() )
{
return false;
}
mCoords.insert( position.vertex, QPointF( vertex.x(), vertex.y() ) );
if ( is3D() )
{
mZ.insert( position.vertex, vertex.z() );
}
if ( isMeasure() )
{
mM.insert( position.vertex, vertex.m() );
}
return true;
}
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;
}
bool QgsLineStringV2::insertVertex( const QgsVertexId& position, const QgsPointV2& vertex )
{
if ( position.vertex < 0 || position.vertex >= mCoords.size() )
{
return false;
}
mCoords.insert( position.vertex, QPointF( vertex.x(), vertex.y() ) );
if ( is3D() )
{
mZ.insert( position.vertex, vertex.z() );
}
if ( isMeasure() )
{
mM.insert( position.vertex, vertex.m() );
}
mBoundingBox = QgsRectangle(); //set bounding box invalid so it needs to be recalculated next time
return true;
}
void QgsLineStringV2::addVertex( const QgsPointV2& pt )
{
if ( mWkbType == QgsWKBTypes::Unknown )
{
setZMTypeFromSubGeometry( &pt, QgsWKBTypes::LineString );
}
mCoords.append( QPointF( pt.x(), pt.y() ) );
if ( is3D() )
{
mZ.append( pt.z() );
}
if ( isMeasure() )
{
mM.append( pt.m() );
}
mBoundingBox = QgsRectangle(); //set bounding box invalid so it needs to be recalculated next time
}
int QgsMapToolCapture::addCurve( QgsCurveV2* c )
{
if ( !c )
{
return 1;
}
if ( !mRubberBand )
{
mRubberBand = createRubberBand( mCaptureMode == CapturePolygon ? QGis::Polygon : QGis::Line );
}
QgsLineStringV2* lineString = c->curveToLine();
QList<QgsPointV2> linePoints;
lineString->points( linePoints );
delete lineString;
QList<QgsPointV2>::const_iterator ptIt = linePoints.constBegin();
for ( ; ptIt != linePoints.constEnd(); ++ptIt )
{
mRubberBand->addPoint( QgsPoint( ptIt->x(), ptIt->y() ) );
}
if ( !mTempRubberBand )
{
mTempRubberBand = createRubberBand( mCaptureMode == CapturePolygon ? QGis::Polygon : QGis::Line, true );
}
else
{
mTempRubberBand->reset();
}
QgsPointV2 endPt = c->endPoint();
mTempRubberBand->addPoint( QgsPoint( endPt.x(), endPt.y() ) ); //add last point of c
//transform back to layer CRS in case map CRS and layer CRS are different
QgsVectorLayer* vlayer = qobject_cast<QgsVectorLayer *>( mCanvas->currentLayer() );
const QgsCoordinateTransform* ct = mCanvas->mapSettings().layerTransform( vlayer );
if ( ct )
{
c->transform( *ct, QgsCoordinateTransform::ReverseTransform );
}
mCaptureCurve.addCurve( c );
return 0;
}
bool QgsCurve::isClosed() const
{
if ( numPoints() == 0 )
return false;
//don't consider M-coordinates when testing closedness
QgsPointV2 start = startPoint();
QgsPointV2 end = endPoint();
return ( qgsDoubleNear( start.x(), end.x(), 1E-8 ) &&
qgsDoubleNear( start.y(), end.y(), 1E-8 ) &&
qgsDoubleNear( start.z(), end.z(), 1E-8 ) );
}
void QgsLineStringV2::addVertex( const QgsPointV2& pt )
{
if ( mWkbType == QgsWKBTypes::Unknown || mX.isEmpty() )
{
setZMTypeFromSubGeometry( &pt, QgsWKBTypes::LineString );
}
mX.append( pt.x() );
mY.append( pt.y() );
if ( is3D() )
{
mZ.append( pt.z() );
}
if ( isMeasure() )
{
mM.append( pt.m() );
}
mBoundingBox = QgsRectangle(); //set bounding box invalid
}
void TestQgsGeometryUtils::testSegmentMidPoint()
{
QFETCH( double, pt1x );
QFETCH( double, pt1y );
QFETCH( double, pt2x );
QFETCH( double, pt2y );
QFETCH( double, radius );
QFETCH( bool, left );
QFETCH( double, expectedX );
QFETCH( double, expectedY );
QgsPointV2 midPoint;
bool ok = QgsGeometryUtils::segmentMidPoint( QgsPointV2( pt1x, pt1y ), QgsPointV2( pt2x, pt2y ),
midPoint, radius, left );
QVERIFY( ok );
QVERIFY( qgsDoubleNear( midPoint.x(), expectedX ) );
QVERIFY( qgsDoubleNear( midPoint.y(), expectedY ) );
}
double QgsGeometryUtils::circleTangentDirection( const QgsPointV2& tangentPoint, const QgsPointV2& cp1,
const QgsPointV2& cp2, const QgsPointV2& cp3 )
{
//calculate circle midpoint
double mX, mY, radius;
circleCenterRadius( cp1, cp2, cp3, radius, mX, mY );
double p1Angle = QgsGeometryUtils::ccwAngle( cp1.y() - mY, cp1.x() - mX );
double p2Angle = QgsGeometryUtils::ccwAngle( cp2.y() - mY, cp2.x() - mX );
double p3Angle = QgsGeometryUtils::ccwAngle( cp3.y() - mY, cp3.x() - mX );
if ( circleClockwise( p1Angle, p2Angle, p3Angle ) )
{
return lineAngle( tangentPoint.x(), tangentPoint.y(), mX, mY );
}
else
{
return lineAngle( mX, mY, tangentPoint.x(), tangentPoint.y() );
}
}
double QgsLineString::closestSegment( const QgsPointV2& pt, QgsPointV2& segmentPt, QgsVertexId& vertexAfter, bool* leftOf, double epsilon ) const
{
double sqrDist = std::numeric_limits<double>::max();
double testDist = 0;
double segmentPtX, segmentPtY;
int size = mX.size();
if ( size == 0 || size == 1 )
{
vertexAfter = QgsVertexId( 0, 0, 0 );
return -1;
}
for ( int i = 1; i < size; ++i )
{
double prevX = mX.at( i - 1 );
double prevY = mY.at( i - 1 );
double currentX = mX.at( i );
double currentY = mY.at( i );
testDist = QgsGeometryUtils::sqrDistToLine( pt.x(), pt.y(), prevX, prevY, currentX, currentY, segmentPtX, segmentPtY, epsilon );
if ( testDist < sqrDist )
{
sqrDist = testDist;
segmentPt.setX( segmentPtX );
segmentPt.setY( segmentPtY );
if ( leftOf )
{
*leftOf = ( QgsGeometryUtils::leftOfLine( pt.x(), pt.y(), prevX, prevY, currentX, currentY ) < 0 );
}
vertexAfter.part = 0;
vertexAfter.ring = 0;
vertexAfter.vertex = i;
}
}
return sqrDist;
}
/**
* Calculate the area of a triangle in 3d space
*/
static double triarea3d( const QgsPointV2 &P1, const QgsPointV2 &P2, const QgsPointV2 &P3 )
{
//LWDEBUG( 2, "Entered triarea3d" );
double ax, bx, ay, by, az, bz, cx, cy, cz, area;
ax = P1.x() - P2.x();
bx = P3.x() - P2.x();
ay = P1.y() - P2.y();
by = P3.y() - P2.y();
az = P1.z() - P2.z();
bz = P3.z() - P2.z();
cx = ay * bz - az * by;
cy = az * bx - ax * bz;
cz = ax * by - ay * bx;
area = qAbs( 0.5 * ( sqrt( cx * cx + cy * cy + cz * cz ) ) );
return area;
}
void QgsGeometrySegmentLengthCheck::collectErrors( QList<QgsGeometryCheckError*>& errors, QStringList &/*messages*/, QAtomicInt* progressCounter , const QgsFeatureIds &ids ) const
{
const QgsFeatureIds& featureIds = ids.isEmpty() ? mFeaturePool->getFeatureIds() : ids;
Q_FOREACH ( QgsFeatureId featureid, featureIds )
{
if ( progressCounter ) progressCounter->fetchAndAddRelaxed( 1 );
QgsFeature feature;
if ( !mFeaturePool->get( featureid, feature ) )
{
continue;
}
QgsGeometry featureGeom = feature.geometry();
QgsAbstractGeometry* geom = featureGeom.geometry();
for ( int iPart = 0, nParts = geom->partCount(); iPart < nParts; ++iPart )
{
for ( int iRing = 0, nRings = geom->ringCount( iPart ); iRing < nRings; ++iRing )
{
int nVerts = QgsGeometryCheckerUtils::polyLineSize( geom, iPart, iRing );
if ( nVerts < 2 )
{
continue;
}
for ( int iVert = 0, jVert = nVerts - 1; iVert < nVerts; jVert = iVert++ )
{
QgsPointV2 pi = geom->vertexAt( QgsVertexId( iPart, iRing, iVert ) );
QgsPointV2 pj = geom->vertexAt( QgsVertexId( iPart, iRing, jVert ) );
double dist = qSqrt( QgsGeometryUtils::sqrDistance2D( pi, pj ) );
if ( dist < mMinLength )
{
errors.append( new QgsGeometryCheckError( this, featureid, QgsPointV2( 0.5 * ( pi.x() + pj.x() ), 0.5 * ( pi.y() + pj.y() ) ), QgsVertexId( iPart, iRing, iVert ), dist, QgsGeometryCheckError::ValueLength ) );
}
}
}
}
}
}
void QgsGeometryRubberBand::paint( QPainter* painter )
{
if ( !mGeometry || !painter )
{
return;
}
painter->save();
painter->translate( -pos() );
if ( mGeometryType == QGis::Polygon )
{
painter->setBrush( mBrush );
}
else
{
painter->setBrush( Qt::NoBrush );
}
painter->setPen( mPen );
QgsAbstractGeometryV2* paintGeom = mGeometry->clone();
paintGeom->transform( mMapCanvas->getCoordinateTransform()->transform() );
paintGeom->draw( *painter );
//draw vertices
QgsVertexId vertexId;
QgsPointV2 vertex;
while ( paintGeom->nextVertex( vertexId, vertex ) )
{
drawVertex( painter, vertex.x(), vertex.y() );
}
delete paintGeom;
painter->restore();
}
void QgsMapToolIdentify::closestVertexAttributes( const QgsAbstractGeometryV2& geometry, QgsVertexId vId, QgsMapLayer *layer, QMap< QString, QString >& derivedAttributes )
{
QString str = QLocale::system().toString( vId.vertex + 1 );
derivedAttributes.insert( tr( "Closest vertex number" ), str );
QgsPointV2 closestPoint = geometry.vertexAt( vId );
QgsPoint closestPointMapCoords = mCanvas->mapSettings().layerToMapCoordinates( layer, QgsPoint( closestPoint.x(), closestPoint.y() ) );
str = QLocale::system().toString( closestPointMapCoords.x(), 'g', 10 );
derivedAttributes.insert( "Closest vertex X", str );
str = QLocale::system().toString( closestPointMapCoords.y(), 'g', 10 );
derivedAttributes.insert( "Closest vertex Y", str );
if ( closestPoint.is3D() )
{
str = QLocale::system().toString( closestPoint.z(), 'g', 10 );
derivedAttributes.insert( "Closest vertex Z", str );
}
if ( closestPoint.isMeasure() )
{
str = QLocale::system().toString( closestPoint.m(), 'g', 10 );
derivedAttributes.insert( "Closest vertex M", str );
}
}
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 );
}
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();
QgsPointSequenceV2 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() );
QgsLineStringV2* segment1 = new QgsLineStringV2();
segment1->addVertex( center );
segment1->addVertex( csPoints.at( 0 ) );
QgsLineStringV2* segment2 = new QgsLineStringV2();
segment2->addVertex( csPoints.at( 2 ) );
segment2->addVertex( center );
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();
}
bool QgsGeometryUtils::lineIntersection( const QgsPointV2& p1, const QgsVector& v, const QgsPointV2& q1, const QgsVector& w, QgsPointV2& inter )
{
double d = v.y() * w.x() - v.x() * w.y();
if ( d == 0 )
return false;
double dx = q1.x() - p1.x();
double dy = q1.y() - p1.y();
double k = ( dy * w.x() - dx * w.y() ) / d;
inter = QgsPointV2( p1.x() + v.x() * k, p1.y() + v.y() * k );
return true;
}
double QgsCircularString::closestPointOnArc( double x1, double y1, double x2, double y2, double x3, double y3,
const QgsPointV2 &pt, QgsPointV2 &segmentPt, QgsVertexId &vertexAfter, bool *leftOf, double epsilon )
{
double radius, centerX, centerY;
QgsPointV2 pt1( x1, y1 );
QgsPointV2 pt2( x2, y2 );
QgsPointV2 pt3( x3, y3 );
QgsGeometryUtils::circleCenterRadius( pt1, pt2, pt3, radius, centerX, centerY );
double angle = QgsGeometryUtils::ccwAngle( pt.y() - centerY, pt.x() - centerX );
double angle1 = QgsGeometryUtils::ccwAngle( pt1.y() - centerY, pt1.x() - centerX );
double angle2 = QgsGeometryUtils::ccwAngle( pt2.y() - centerY, pt2.x() - centerX );
double angle3 = QgsGeometryUtils::ccwAngle( pt3.y() - centerY, pt3.x() - centerX );
bool clockwise = QgsGeometryUtils::circleClockwise( angle1, angle2, angle3 );
if ( QgsGeometryUtils::angleOnCircle( angle, angle1, angle2, angle3 ) )
{
//get point on line center -> pt with distance radius
segmentPt = QgsGeometryUtils::pointOnLineWithDistance( QgsPointV2( centerX, centerY ), pt, radius );
//vertexAfter
vertexAfter.vertex = QgsGeometryUtils::circleAngleBetween( angle, angle1, angle2, clockwise ) ? 1 : 2;
}
else
{
double distPtPt1 = QgsGeometryUtils::sqrDistance2D( pt, pt1 );
double distPtPt3 = QgsGeometryUtils::sqrDistance2D( pt, pt3 );
segmentPt = ( distPtPt1 <= distPtPt3 ) ? pt1 : pt3;
vertexAfter.vertex = ( distPtPt1 <= distPtPt3 ) ? 1 : 2;
}
double sqrDistance = QgsGeometryUtils::sqrDistance2D( segmentPt, pt );
//prevent rounding errors if the point is directly on the segment
if ( qgsDoubleNear( sqrDistance, 0.0, epsilon ) )
{
segmentPt.setX( pt.x() );
segmentPt.setY( pt.y() );
sqrDistance = 0.0;
}
if ( leftOf )
{
*leftOf = clockwise ? sqrDistance > radius : sqrDistance < radius;
}
return sqrDistance;
}
QgsTriangle::QgsTriangle( const QgsPointV2 &p1, const QgsPointV2 &p2, const QgsPointV2 &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 );
}