Hi,
Buffer require some parameter since you can choose the "style" of
buffer. You have some example on PostGis documentation (parameters are
the same)
http://postgis.net/docs/ST_Buffer.html
QGis define this parameters in Settings->Options->Digitizing->Curve
offset tool.
You can get this parameters via QSettings :
join = QSettings().value("Qgis/digitizing/offset_join_style", 0, type=int)
quad = QSettings().value("Qgis/digitizing/offset_quad_seg", 8, type=int)
endCap = quad
miter = QSettings().value("Qgis/digitizing/offset_miter_limit", 5, type=int)
Regards
l.bartoletti
Le 18/09/2015 23:12, Tudorache, Marian a écrit :
Hi everyone,
I would like to find more details about QgsGeometry::buffer with more
styles.
In QGIS API Documentation there are two version of the buffer:
Simple version with distance and segments and with sytles.
The one with styles is defines as: ( distance, segments, endCapStyle,
joinStyle, mitreLimit );
I do not understand the followings parameters:
endCapStyle: Round (1) / Flat (2) / Square (3) end cap style
joinStyle: Round (1) / Mitre (2) / Bevel (3) join style
mitreLimit: Limit on the mitre ratio used for very sharp corners
Does someone has some examples or recommend a book where to find more
details please?
The QGIS API Documentation does not give me too much.
Thanks,
Marian
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