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Add default value to epsilon.

Change example for python.
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lbartoletti committed Dec 15, 2017
1 parent 89fb854 commit 72f5adf3685be335774d70baadb83eb70bb474b4
@@ -98,7 +98,7 @@ class QgsGeometryUtils
:rtype: bool
%End

static bool segmentIntersection( const QgsPoint &p1, const QgsPoint &p2, const QgsPoint &q1, const QgsPoint &q2, QgsPoint &intersectionPoint /Out/, bool &isIntersection /Out/, double tolerance, bool acceptImproperIntersection = false );
static bool segmentIntersection( const QgsPoint &p1, const QgsPoint &p2, const QgsPoint &q1, const QgsPoint &q2, QgsPoint &intersectionPoint /Out/, bool &isIntersection /Out/, const double tolerance = 1e-8, bool acceptImproperIntersection = false );
%Docstring
Compute the intersection between two segments
\param p1 First segment start point
@@ -112,24 +112,23 @@ class QgsGeometryUtils
:return: Whether the segments intersect
* Example:
\code{.py}
epsilon = 1e-8
ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 1 ), QgsPoint( 1, 1 ), QgsPoint( 1, 0 ), epsilon )
ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 1 ), QgsPoint( 1, 1 ), QgsPoint( 1, 0 ) )
ret[0], ret[1].asWkt(), ret[2]
# Whether the segments intersect, the intersection point, is intersect
# (False, 'Point (0 0)', False)
ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 5 ), QgsPoint( 0, 5 ), QgsPoint( 1, 5 ), epsilon )
ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 5 ), QgsPoint( 0, 5 ), QgsPoint( 1, 5 ) )
ret[0], ret[1].asWkt(), ret[2]
# (False, 'Point (0 5)', True)
ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 5 ), QgsPoint( 0, 5 ), QgsPoint( 1, 5 ), epsilon, True )
ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 5 ), QgsPoint( 0, 5 ), QgsPoint( 1, 5 ), acceptImproperIntersection=True )
ret[0], ret[1].asWkt(), ret[2]
# (True, 'Point (0 5)', True)
ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 5 ), QgsPoint( 0, 2 ), QgsPoint( 1, 5 ), epsilon )
ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 5 ), QgsPoint( 0, 2 ), QgsPoint( 1, 5 ) )
ret[0], ret[1].asWkt(), ret[2]
# (False, 'Point (0 2)', True)
ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 5 ), QgsPoint( 0, 2 ), QgsPoint( 1, 5 ), epsilon, True )
ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 5 ), QgsPoint( 0, 2 ), QgsPoint( 1, 5 ), acceptImproperIntersection=True )
ret[0], ret[1].asWkt(), ret[2]
# (True, 'Point (0 2)', True)
ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, -5 ), QgsPoint( 0, 5 ), QgsPoint( 2, 0 ), QgsPoint( -1, 0 ), epsilon )
ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, -5 ), QgsPoint( 0, 5 ), QgsPoint( 2, 0 ), QgsPoint( -1, 0 ) )
ret[0], ret[1].asWkt(), ret[2]
# (True, 'Point (0 0)', True)
\endcode
@@ -63,10 +63,9 @@ void QgsMapToolCircle2TangentsPoint::cadCanvasReleaseEvent( QgsMapMouseEvent *e
if ( mPoints.size() == 4 )
{
bool isIntersect = false;
const double epsilon = 1e-8;
QgsPoint ptInter;
QgsGeometryUtils::segmentIntersection( mPoints.at( 0 ), mPoints.at( 1 ),
mPoints.at( 2 ), mPoints.at( 3 ), ptInter, isIntersect, epsilon );
mPoints.at( 2 ), mPoints.at( 3 ), ptInter, isIntersect );
if ( !isIntersect )
{
QgisApp::instance()->messageBar()->pushMessage( tr( "Error" ), tr( "Segments are parallels" ),
@@ -173,19 +172,18 @@ void QgsMapToolCircle2TangentsPoint::getPossibleCenter( )
QgsGeometry line2p = line2.offsetCurve( + mRadius, 8, QgsGeometry::JoinStyleBevel, 5 );

bool isIntersect = false;
const double epsilon = 1e-8;
QgsPoint inter;
QgsGeometryUtils::segmentIntersection( QgsPoint( line1m.asPolyline().at( 0 ) ), QgsPoint( line1m.asPolyline().at( 1 ) ),
QgsPoint( line2m.asPolyline().at( 0 ) ), QgsPoint( line2m.asPolyline().at( 1 ) ), inter, isIntersect, epsilon );
QgsPoint( line2m.asPolyline().at( 0 ) ), QgsPoint( line2m.asPolyline().at( 1 ) ), inter, isIntersect );
mCenters.append( QgsPointXY( inter ) );
QgsGeometryUtils::segmentIntersection( QgsPoint( line1m.asPolyline().at( 0 ) ), QgsPoint( line1m.asPolyline().at( 1 ) ),
QgsPoint( line2p.asPolyline().at( 0 ) ), QgsPoint( line2p.asPolyline().at( 1 ) ), inter, isIntersect, epsilon );
QgsPoint( line2p.asPolyline().at( 0 ) ), QgsPoint( line2p.asPolyline().at( 1 ) ), inter, isIntersect );
mCenters.append( QgsPointXY( inter ) );
QgsGeometryUtils::segmentIntersection( QgsPoint( line1p.asPolyline().at( 0 ) ), QgsPoint( line1p.asPolyline().at( 1 ) ),
QgsPoint( line2m.asPolyline().at( 0 ) ), QgsPoint( line2m.asPolyline().at( 1 ) ), inter, isIntersect, epsilon );
QgsPoint( line2m.asPolyline().at( 0 ) ), QgsPoint( line2m.asPolyline().at( 1 ) ), inter, isIntersect );
mCenters.append( QgsPointXY( inter ) );
QgsGeometryUtils::segmentIntersection( QgsPoint( line1p.asPolyline().at( 0 ) ), QgsPoint( line1p.asPolyline().at( 1 ) ),
QgsPoint( line2p.asPolyline().at( 0 ) ), QgsPoint( line2p.asPolyline().at( 1 ) ), inter, isIntersect, epsilon );
QgsPoint( line2p.asPolyline().at( 0 ) ), QgsPoint( line2p.asPolyline().at( 1 ) ), inter, isIntersect );
mCenters.append( QgsPointXY( inter ) );
}
}
@@ -251,7 +251,7 @@ bool QgsGeometryUtils::lineIntersection( const QgsPoint &p1, QgsVector v, const
return true;
}

bool QgsGeometryUtils::segmentIntersection( const QgsPoint &p1, const QgsPoint &p2, const QgsPoint &q1, const QgsPoint &q2, QgsPoint &intersectionPoint, bool &isIntersection, double tolerance, bool acceptImproperIntersection )
bool QgsGeometryUtils::segmentIntersection( const QgsPoint &p1, const QgsPoint &p2, const QgsPoint &q1, const QgsPoint &q2, QgsPoint &intersectionPoint, bool &isIntersection, const double tolerance, bool acceptImproperIntersection )
{
isIntersection = false;

@@ -113,29 +113,28 @@ class CORE_EXPORT QgsGeometryUtils
* \returns Whether the segments intersect
* * Example:
* \code{.py}
* epsilon = 1e-8
* ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 1 ), QgsPoint( 1, 1 ), QgsPoint( 1, 0 ), epsilon )
* ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 1 ), QgsPoint( 1, 1 ), QgsPoint( 1, 0 ) )
* ret[0], ret[1].asWkt(), ret[2]
* # Whether the segments intersect, the intersection point, is intersect
* # (False, 'Point (0 0)', False)
* ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 5 ), QgsPoint( 0, 5 ), QgsPoint( 1, 5 ), epsilon )
* ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 5 ), QgsPoint( 0, 5 ), QgsPoint( 1, 5 ) )
* ret[0], ret[1].asWkt(), ret[2]
* # (False, 'Point (0 5)', True)
* ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 5 ), QgsPoint( 0, 5 ), QgsPoint( 1, 5 ), epsilon, True )
* ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 5 ), QgsPoint( 0, 5 ), QgsPoint( 1, 5 ), acceptImproperIntersection=True )
* ret[0], ret[1].asWkt(), ret[2]
* # (True, 'Point (0 5)', True)
* ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 5 ), QgsPoint( 0, 2 ), QgsPoint( 1, 5 ), epsilon )
* ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 5 ), QgsPoint( 0, 2 ), QgsPoint( 1, 5 ) )
* ret[0], ret[1].asWkt(), ret[2]
* # (False, 'Point (0 2)', True)
* ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 5 ), QgsPoint( 0, 2 ), QgsPoint( 1, 5 ), epsilon, True )
* ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, 0 ), QgsPoint( 0, 5 ), QgsPoint( 0, 2 ), QgsPoint( 1, 5 ), acceptImproperIntersection=True )
* ret[0], ret[1].asWkt(), ret[2]
* # (True, 'Point (0 2)', True)
* ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, -5 ), QgsPoint( 0, 5 ), QgsPoint( 2, 0 ), QgsPoint( -1, 0 ), epsilon )
* ret = QgsGeometryUtils.segmentIntersection( QgsPoint( 0, -5 ), QgsPoint( 0, 5 ), QgsPoint( 2, 0 ), QgsPoint( -1, 0 ) )
* ret[0], ret[1].asWkt(), ret[2]
* # (True, 'Point (0 0)', True)
* \endcode
*/
static bool segmentIntersection( const QgsPoint &p1, const QgsPoint &p2, const QgsPoint &q1, const QgsPoint &q2, QgsPoint &intersectionPoint SIP_OUT, bool &isIntersection SIP_OUT, double tolerance, bool acceptImproperIntersection = false );
static bool segmentIntersection( const QgsPoint &p1, const QgsPoint &p2, const QgsPoint &q1, const QgsPoint &q2, QgsPoint &intersectionPoint SIP_OUT, bool &isIntersection SIP_OUT, const double tolerance = 1e-8, bool acceptImproperIntersection = false );

/**
* \brief Project the point on a segment

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