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# coding: utf-8
# /*##########################################################################
#
# Copyright (c) 2019 European Synchrotron Radiation Facility
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ###########################################################################*/
"""This module provides a widget to visualize 3D arrays"""
__authors__ = ["T. Vincent"]
__license__ = "MIT"
__date__ = "22/03/2019"
import numpy
from .. import qt
from ..plot3d.SceneWindow import SceneWindow
from ..plot3d.items import ScalarField3D, ComplexField3D, ItemChangedType
class VolumeWindow(SceneWindow):
"""Extends SceneWindow with a convenient API for 3D array
:param QWidget: parent
"""
def __init__(self, parent):
super(VolumeWindow, self).__init__(parent)
self.__firstData = True
# Hide global parameter dock
self.getGroupResetWidget().parent().setVisible(False)
def setAxesLabels(self, xlabel=None, ylabel=None, zlabel=None):
"""Set the text labels of the axes.
:param Union[str,None] xlabel: Label of the X axis
:param Union[str,None] ylabel: Label of the Y axis
:param Union[str,None] zlabel: Label of the Z axis
"""
sceneWidget = self.getSceneWidget()
sceneWidget.getSceneGroup().setAxesLabels(
'X' if xlabel is None else xlabel,
'Y' if ylabel is None else ylabel,
'Z' if zlabel is None else zlabel)
def clear(self):
"""Clear any currently displayed data"""
sceneWidget = self.getSceneWidget()
items = sceneWidget.getItems()
if (len(items) == 1 and
isinstance(items[0], (ScalarField3D, ComplexField3D))):
items[0].setData(None)
else: # Safety net
sceneWidget.clearItems()
@staticmethod
def __computeIsolevel(data):
"""Returns a suitable isolevel value for data
:param numpy.ndarray data:
:rtype: float
"""
data = data[numpy.isfinite(data)]
if len(data) == 0:
return 0
else:
return numpy.mean(data) + numpy.std(data)
def setData(self, data, offset=(0., 0., 0.), scale=(1., 1., 1.)):
"""Set the 3D array data to display.
:param numpy.ndarray data: 3D array of float or complex
:param List[float] offset: (tx, ty, tz) coordinates of the origin
:param List[float] scale: (sx, sy, sz) scale for each dimension
"""
sceneWidget = self.getSceneWidget()
dataMaxCoords = numpy.array(list(reversed(data.shape))) - 1
previousItems = sceneWidget.getItems()
if (len(previousItems) == 1 and
isinstance(previousItems[0], (ScalarField3D, ComplexField3D)) and
numpy.iscomplexobj(data) == isinstance(previousItems[0], ComplexField3D)):
# Reuse existing volume item
volume = sceneWidget.getItems()[0]
volume.setData(data, copy=False)
# Make sure the plane goes through the dataset
for plane in volume.getCutPlanes():
point = numpy.array(plane.getPoint())
if numpy.any(point < (0, 0, 0)) or numpy.any(point > dataMaxCoords):
plane.setPoint(dataMaxCoords // 2)
else:
# Add a new volume
sceneWidget.clearItems()
volume = sceneWidget.addVolume(data, copy=False)
volume.setLabel('Volume')
for plane in volume.getCutPlanes():
# Make plane going through the center of the data
plane.setPoint(dataMaxCoords // 2)
plane.setVisible(False)
plane.sigItemChanged.connect(self.__cutPlaneUpdated)
volume.addIsosurface(self.__computeIsolevel, '#FF0000FF')
# Expand the parameter tree
model = self.getParamTreeView().model()
index = qt.QModelIndex() # Invalid index for top level
while 1:
rowCount = model.rowCount(parent=index)
if rowCount == 0:
break
index = model.index(rowCount - 1, 0, parent=index)
self.getParamTreeView().setExpanded(index, True)
if not index.isValid():
break
volume.setTranslation(*offset)
volume.setScale(*scale)
if self.__firstData: # Only center for first dataset
self.__firstData = False
sceneWidget.centerScene()
def __cutPlaneUpdated(self, event):
"""Handle the change of visibility of the cut plane
:param event: Kind of update
"""
if event == ItemChangedType.VISIBLE:
plane = self.sender()
if plane.isVisible():
self.getSceneWidget().selection().setCurrentItem(plane)
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