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 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 ) );
}
}
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;
}
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;
}
/**
* 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 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;
}
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
}
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 || 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
}
bool QgsLineStringV2::moveVertex( const QgsVertexId& position, const QgsPointV2& newPos )
{
if ( position.vertex < 0 || position.vertex >= mX.size() )
{
return false;
}
mX[position.vertex] = newPos.x();
mY[position.vertex] = newPos.y();
if ( is3D() && newPos.is3D() )
{
mZ[position.vertex] = newPos.z();
}
if ( isMeasure() && newPos.isMeasure() )
{
mM[position.vertex] = newPos.m();
}
mBoundingBox = QgsRectangle(); //set bounding box invalid
return true;
}
bool QgsCircularString::moveVertex( QgsVertexId position, const QgsPointV2 &newPos )
{
if ( position.vertex < 0 || position.vertex >= mX.size() )
{
return false;
}
mX[position.vertex] = newPos.x();
mY[position.vertex] = newPos.y();
if ( is3D() && newPos.is3D() )
{
mZ[position.vertex] = newPos.z();
}
if ( isMeasure() && newPos.isMeasure() )
{
mM[position.vertex] = newPos.m();
}
clearCache(); //set bounding box invalid
return true;
}
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 );
}
}
void QgsCircularString::segmentize( const QgsPointV2& p1, const QgsPointV2& p2, const QgsPointV2& p3, QgsPointSequence &points, double tolerance, SegmentationToleranceType toleranceType ) const
{
//adapted code from postgis
double radius = 0;
double centerX = 0;
double centerY = 0;
QgsGeometryUtils::circleCenterRadius( p1, p2, p3, radius, centerX, centerY );
int segSide = segmentSide( p1, p3, p2 );
if ( p1 != p3 && ( radius < 0 || qgsDoubleNear( segSide, 0.0 ) ) ) //points are colinear
{
points.append( p1 );
points.append( p2 );
points.append( p3 );
return;
}
bool clockwise = false;
if ( segSide == -1 )
{
clockwise = true;
}
double increment = tolerance; //one segment per degree
if ( toleranceType == QgsAbstractGeometry::MaximumDifference )
{
double halfAngle = acos( -tolerance / radius + 1 );
increment = 2 * halfAngle;
}
//angles of pt1, pt2, pt3
double a1 = atan2( p1.y() - centerY, p1.x() - centerX );
double a2 = atan2( p2.y() - centerY, p2.x() - centerX );
double a3 = atan2( p3.y() - centerY, p3.x() - centerX );
if ( clockwise )
{
increment *= -1;
/* Adjust a3 down so we can decrement from a1 to a3 cleanly */
if ( a3 >= a1 )
a3 -= 2.0 * M_PI;
if ( a2 > a1 )
a2 -= 2.0 * M_PI;
}
else
{
/* Adjust a3 up so we can increment from a1 to a3 cleanly */
if ( a3 <= a1 )
a3 += 2.0 * M_PI;
if ( a2 < a1 )
a2 += 2.0 * M_PI;
}
bool hasZ = is3D();
bool hasM = isMeasure();
double x, y;
double z = 0;
double m = 0;
points.append( p1 );
if ( p2 != p3 && p1 != p2 ) //draw straight line segment if two points have the same position
{
QgsWkbTypes::Type pointWkbType = QgsWkbTypes::Point;
if ( hasZ )
pointWkbType = QgsWkbTypes::addZ( pointWkbType );
if ( hasM )
pointWkbType = QgsWkbTypes::addM( pointWkbType );
//make sure the curve point p2 is part of the segmentized vertices. But only if p1 != p3
bool addP2 = true;
if ( qgsDoubleNear( p1.x(), p3.x() ) && qgsDoubleNear( p1.y(), p3.y() ) )
{
addP2 = false;
}
for ( double angle = a1 + increment; clockwise ? angle > a3 : angle < a3; angle += increment )
{
if (( addP2 && clockwise && angle < a2 ) || ( addP2 && !clockwise && angle > a2 ) )
{
points.append( p2 );
addP2 = false;
}
x = centerX + radius * cos( angle );
y = centerY + radius * sin( angle );
if ( !hasZ && !hasM )
{
points.append( QgsPointV2( x, y ) );
continue;
}
if ( hasZ )
{
z = interpolateArc( angle, a1, a2, a3, p1.z(), p2.z(), p3.z() );
}
if ( hasM )
{
m = interpolateArc( angle, a1, a2, a3, p1.m(), p2.m(), p3.m() );
}
points.append( QgsPointV2( pointWkbType, x, y, z, m ) );
}
}
points.append( p3 );
}
void QgsMarkerLineSymbolLayerV2::renderPolylineVertex( const QPolygonF& points, QgsSymbolV2RenderContext& context, Placement placement )
{
if ( points.isEmpty() )
return;
QgsRenderContext& rc = context.renderContext();
double origAngle = mMarker->angle();
int i, maxCount;
bool isRing = false;
double offsetAlongLine = mOffsetAlongLine;
if ( hasDataDefinedProperty( QgsSymbolLayerV2::EXPR_OFFSET_ALONG_LINE ) )
{
context.setOriginalValueVariable( mOffsetAlongLine );
offsetAlongLine = evaluateDataDefinedProperty( QgsSymbolLayerV2::EXPR_OFFSET_ALONG_LINE, context, mOffsetAlongLine ).toDouble();
}
if ( offsetAlongLine != 0 )
{
//scale offset along line
offsetAlongLine = QgsSymbolLayerV2Utils::convertToPainterUnits( rc, offsetAlongLine, mOffsetAlongLineUnit, mOffsetAlongLineMapUnitScale );
}
if ( offsetAlongLine == 0 && context.renderContext().geometry()
&& context.renderContext().geometry()->hasCurvedSegments() && ( placement == Vertex || placement == CurvePoint ) )
{
const QgsCoordinateTransform* ct = context.renderContext().coordinateTransform();
const QgsMapToPixel& mtp = context.renderContext().mapToPixel();
QgsVertexId vId;
QgsPointV2 vPoint;
double x, y, z;
QPointF mapPoint;
while ( context.renderContext().geometry()->nextVertex( vId, vPoint ) )
{
if (( placement == Vertex && vId.type == QgsVertexId::SegmentVertex )
|| ( placement == CurvePoint && vId.type == QgsVertexId::CurveVertex ) )
{
//transform
x = vPoint.x(), y = vPoint.y(); z = vPoint.z();
if ( ct )
{
ct->transformInPlace( x, y, z );
}
mapPoint.setX( x ); mapPoint.setY( y );
mtp.transformInPlace( mapPoint.rx(), mapPoint.ry() );
if ( mRotateMarker )
{
double angle = context.renderContext().geometry()->vertexAngle( vId );
mMarker->setAngle( angle * 180 / M_PI );
}
mMarker->renderPoint( mapPoint, context.feature(), rc, -1, context.selected() );
}
}
return;
}
if ( placement == FirstVertex )
{
i = 0;
maxCount = 1;
}
else if ( placement == LastVertex )
{
i = points.count() - 1;
maxCount = points.count();
}
else if ( placement == Vertex )
{
i = 0;
maxCount = points.count();
if ( points.first() == points.last() )
isRing = true;
}
else
{
return;
}
if ( offsetAlongLine > 0 && ( placement == FirstVertex || placement == LastVertex ) )
{
double distance;
distance = placement == FirstVertex ? offsetAlongLine : -offsetAlongLine;
renderOffsetVertexAlongLine( points, i, distance, context );
// restore original rotation
mMarker->setAngle( origAngle );
return;
}
for ( ; i < maxCount; ++i )
{
if ( isRing && placement == Vertex && i == points.count() - 1 )
{
continue; // don't draw the last marker - it has been drawn already
}
// rotate marker (if desired)
if ( mRotateMarker )
{
double angle = markerAngle( points, isRing, i );
mMarker->setAngle( origAngle + angle * 180 / M_PI );
}
mMarker->renderPoint( points.at( i ), context.feature(), rc, -1, context.selected() );
}
// restore original rotation
mMarker->setAngle( origAngle );
}
void QgsFeatureRendererV2::renderFeatureWithSymbol( QgsFeature& feature, QgsSymbolV2* symbol, QgsRenderContext& context, int layer, bool selected, bool drawVertexMarker )
{
QgsSymbolV2::SymbolType symbolType = symbol->type();
const QgsGeometry* geom = feature.constGeometry();
if ( !geom || !geom->geometry() )
{
return;
}
const QgsGeometry* segmentizedGeometry = geom;
bool deleteSegmentizedGeometry = false;
context.setGeometry( geom->geometry() );
//convert curve types to normal point/line/polygon ones
switch ( QgsWKBTypes::flatType( geom->geometry()->wkbType() ) )
{
case QgsWKBTypes::CurvePolygon:
case QgsWKBTypes::CircularString:
case QgsWKBTypes::CompoundCurve:
case QgsWKBTypes::MultiSurface:
case QgsWKBTypes::MultiCurve:
{
QgsAbstractGeometryV2* g = geom->geometry()->segmentize();
if ( !g )
{
return;
}
segmentizedGeometry = new QgsGeometry( g );
deleteSegmentizedGeometry = true;
break;
}
default:
break;
}
switch ( QgsWKBTypes::flatType( segmentizedGeometry->geometry()->wkbType() ) )
{
case QgsWKBTypes::Point:
{
if ( symbolType != QgsSymbolV2::Marker )
{
QgsDebugMsg( "point can be drawn only with marker symbol!" );
break;
}
QPointF pt;
_getPoint( pt, context, segmentizedGeometry->asWkb() );
(( QgsMarkerSymbolV2* )symbol )->renderPoint( pt, &feature, context, layer, selected );
if ( context.testFlag( QgsRenderContext::DrawSymbolBounds ) )
{
//draw debugging rect
context.painter()->setPen( Qt::red );
context.painter()->setBrush( QColor( 255, 0, 0, 100 ) );
context.painter()->drawRect((( QgsMarkerSymbolV2* )symbol )->bounds( pt, context ) );
}
}
break;
case QgsWKBTypes::LineString:
{
if ( symbolType != QgsSymbolV2::Line )
{
QgsDebugMsg( "linestring can be drawn only with line symbol!" );
break;
}
QPolygonF pts;
_getLineString( pts, context, segmentizedGeometry->asWkb(), symbol->clipFeaturesToExtent() );
(( QgsLineSymbolV2* )symbol )->renderPolyline( pts, &feature, context, layer, selected );
}
break;
case QgsWKBTypes::Polygon:
{
if ( symbolType != QgsSymbolV2::Fill )
{
QgsDebugMsg( "polygon can be drawn only with fill symbol!" );
break;
}
QPolygonF pts;
QList<QPolygonF> holes;
_getPolygon( pts, holes, context, segmentizedGeometry->asWkb(), symbol->clipFeaturesToExtent() );
(( QgsFillSymbolV2* )symbol )->renderPolygon( pts, ( holes.count() ? &holes : NULL ), &feature, context, layer, selected );
}
break;
case QgsWKBTypes::MultiPoint:
{
if ( symbolType != QgsSymbolV2::Marker )
{
QgsDebugMsg( "multi-point can be drawn only with marker symbol!" );
break;
}
QgsConstWkbPtr wkbPtr( segmentizedGeometry->asWkb() + 1 + sizeof( int ) );
unsigned int num;
wkbPtr >> num;
const unsigned char* ptr = wkbPtr;
QPointF pt;
for ( unsigned int i = 0; i < num; ++i )
{
ptr = QgsConstWkbPtr( _getPoint( pt, context, ptr ) );
(( QgsMarkerSymbolV2* )symbol )->renderPoint( pt, &feature, context, layer, selected );
}
}
break;
case QgsWKBTypes::MultiCurve:
case QgsWKBTypes::MultiLineString:
{
if ( symbolType != QgsSymbolV2::Line )
{
QgsDebugMsg( "multi-linestring can be drawn only with line symbol!" );
break;
}
QgsConstWkbPtr wkbPtr( segmentizedGeometry->asWkb() + 1 + sizeof( int ) );
unsigned int num;
wkbPtr >> num;
const unsigned char* ptr = wkbPtr;
QPolygonF pts;
const QgsGeometryCollectionV2* geomCollection = dynamic_cast<const QgsGeometryCollectionV2*>( geom->geometry() );
for ( unsigned int i = 0; i < num; ++i )
{
if ( geomCollection )
{
context.setGeometry( geomCollection->geometryN( i ) );
}
ptr = QgsConstWkbPtr( _getLineString( pts, context, ptr, symbol->clipFeaturesToExtent() ) );
(( QgsLineSymbolV2* )symbol )->renderPolyline( pts, &feature, context, layer, selected );
}
}
break;
case QgsWKBTypes::MultiSurface:
case QgsWKBTypes::MultiPolygon:
{
if ( symbolType != QgsSymbolV2::Fill )
{
QgsDebugMsg( "multi-polygon can be drawn only with fill symbol!" );
break;
}
QgsConstWkbPtr wkbPtr( segmentizedGeometry->asWkb() + 1 + sizeof( int ) );
unsigned int num;
wkbPtr >> num;
const unsigned char* ptr = wkbPtr;
QPolygonF pts;
QList<QPolygonF> holes;
const QgsGeometryCollectionV2* geomCollection = dynamic_cast<const QgsGeometryCollectionV2*>( geom->geometry() );
for ( unsigned int i = 0; i < num; ++i )
{
if ( geomCollection )
{
context.setGeometry( geomCollection->geometryN( i ) );
}
ptr = _getPolygon( pts, holes, context, ptr, symbol->clipFeaturesToExtent() );
(( QgsFillSymbolV2* )symbol )->renderPolygon( pts, ( holes.count() ? &holes : NULL ), &feature, context, layer, selected );
}
break;
}
default:
QgsDebugMsg( QString( "feature %1: unsupported wkb type 0x%2 for rendering" ).arg( feature.id() ).arg( geom->wkbType(), 0, 16 ) );
}
if ( drawVertexMarker )
{
const QgsCoordinateTransform* ct = context.coordinateTransform();
const QgsMapToPixel& mtp = context.mapToPixel();
QgsPointV2 vertexPoint;
QgsVertexId vertexId;
double x, y, z;
QPointF mapPoint;
while ( geom->geometry()->nextVertex( vertexId, vertexPoint ) )
{
//transform
x = vertexPoint.x(); y = vertexPoint.y(); z = vertexPoint.z();
if ( ct )
{
ct->transformInPlace( x, y, z );
}
mapPoint.setX( x ); mapPoint.setY( y );
mtp.transformInPlace( mapPoint.rx(), mapPoint.ry() );
renderVertexMarker( mapPoint, context );
}
}
if ( deleteSegmentizedGeometry )
{
delete segmentizedGeometry;
}
}
