void QgsLineString::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() );
}
clearCache(); //set bounding box invalid
}
bool QgsLineString::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;
}
bool QgsLineStringV2::moveVertex( const QgsVertexId& position, const QgsPointV2& newPos )
{
if ( position.vertex < 0 || position.vertex >= mCoords.size() )
{
return false;
}
mCoords[position.vertex].rx() = newPos.x();
mCoords[position.vertex].ry() = 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;
}
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 );
}