QGIS API Documentation
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src
core
geometry
qgslinesegment.cpp
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/***************************************************************************
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qgslinesegment.cpp
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-----------------
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begin : April 2018
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copyright : (C) 2018 by Nyall Dawson
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email : nyall dot dawson at gmail dot com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "
qgslinesegment.h
"
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#include "
qgsgeometryutils.h
"
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int
QgsLineSegment2D::pointLeftOfLine
(
const
QgsPointXY
&point )
const
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{
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return
QgsGeometryUtilsBase::leftOfLine
( point.
x
(), point.
y
(), mStart.
x
(), mStart.
y
(), mEnd.
x
(), mEnd.
y
() );
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}
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QgsGeometryUtilsBase::leftOfLine
static int leftOfLine(const double x, const double y, const double x1, const double y1, const double x2, const double y2)
Returns a value < 0 if the point (x, y) is left of the line from (x1, y1) -> (x2, y2).
Definition
qgsgeometryutils_base.cpp:59
QgsLineSegment2D::pointLeftOfLine
int pointLeftOfLine(const QgsPointXY &point) const
Tests if a point is to the left of the line segment.
Definition
qgslinesegment.cpp:21
QgsPointXY
A class to represent a 2D point.
Definition
qgspointxy.h:60
QgsPointXY::y
double y
Definition
qgspointxy.h:64
QgsPointXY::x
double x
Definition
qgspointxy.h:63
qgsgeometryutils.h
qgslinesegment.h
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