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agiudiceandrea/raggio_cerchio.py

Created July 15, 2021 10:10
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raggio_cerchio.py
from qgis.core import *
from qgis.gui import *
@qgsfunction(args='auto', group='Custom')
def raggio_cerchio(qPt1, qPt2, qPt3, feature, parent):
"""
Calcola il raggio del cerchio passante per tre punti.
"""
pt1 = QgsPoint(qPt1.asPoint())
pt2 = QgsPoint(qPt2.asPoint())
pt3 = QgsPoint(qPt3.asPoint())
raggio = QgsGeometryUtils.circleCenterRadius(pt1, pt2, pt3)[0]
if raggio == -1:
raggio = None
return raggio
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