本文整理汇总了Python中qgis.core.QgsGeometry.orientedMinimumBoundingBox方法的典型用法代码示例。如果您正苦于以下问题：Python QgsGeometry.orientedMinimumBoundingBox方法的具体用法？Python QgsGeometry.orientedMinimumBoundingBox怎么用？Python QgsGeometry.orientedMinimumBoundingBox使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qgis.core.QgsGeometry的用法示例。
在下文中一共展示了QgsGeometry.orientedMinimumBoundingBox方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: layerOmmb
# 需要导入模块: from qgis.core import QgsGeometry [as 别名]
# 或者: from qgis.core.QgsGeometry import orientedMinimumBoundingBox [as 别名]
def layerOmmb(self, layer, writer, feedback):
req = QgsFeatureRequest().setSubsetOfAttributes([])
features = vector.features(layer, req)
total = 100.0 / len(features)
newgeometry = QgsGeometry()
first = True
for current, inFeat in enumerate(features):
if first:
newgeometry = inFeat.geometry()
first = False
else:
newgeometry = newgeometry.combine(inFeat.geometry())
feedback.setProgress(int(current * total))
geometry, area, angle, width, height = newgeometry.orientedMinimumBoundingBox()
if geometry:
outFeat = QgsFeature()
outFeat.setGeometry(geometry)
outFeat.setAttributes([area,
width * 2 + height * 2,
angle,
width,
height])
writer.addFeature(outFeat)示例2: createFeature
# 需要导入模块: from qgis.core import QgsGeometry [as 别名]
# 或者: from qgis.core.QgsGeometry import orientedMinimumBoundingBox [as 别名]
def createFeature(self, feedback, feature_id, type, geometries, class_field=None):
attrs = [feature_id]
if class_field is not None:
attrs.append(class_field)
multi_point = QgsMultiPoint()
for g in geometries:
if feedback.isCanceled():
break
vid = QgsVertexId()
while True:
if feedback.isCanceled():
break
found, point = g.constGet().nextVertex(vid)
if found:
multi_point.addGeometry(point)
else:
break
geometry = QgsGeometry(multi_point)
output_geometry = None
if type == 0:
# envelope
rect = geometry.boundingBox()
output_geometry = QgsGeometry.fromRect(rect)
attrs.append(rect.width())
attrs.append(rect.height())
attrs.append(rect.area())
attrs.append(rect.perimeter())
elif type == 1:
# oriented rect
output_geometry, area, angle, width, height = geometry.orientedMinimumBoundingBox()
attrs.append(width)
attrs.append(height)
attrs.append(angle)
attrs.append(area)
attrs.append(2 * width + 2 * height)
elif type == 2:
# circle
output_geometry, center, radius = geometry.minimalEnclosingCircle(segments=72)
attrs.append(radius)
attrs.append(math.pi * radius * radius)
elif type == 3:
# convex hull
output_geometry = geometry.convexHull()
attrs.append(output_geometry.constGet().area())
attrs.append(output_geometry.constGet().perimeter())
f = QgsFeature()
f.setAttributes(attrs)
f.setGeometry(output_geometry)
return f