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proppicker.py
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proppicker.py
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#!/usr/bin/env python
# -*- coding: UTF-8 -*-
import sys
import os.path
import weakref
from PyQt4 import QtCore, QtGui
QtCore.Signal = QtCore.pyqtSignal
import vtk
from vtk.qt4.QVTKRenderWindowInteractor import QVTKRenderWindowInteractor
class MouseInteractorActor(vtk.vtkInteractorStyleTrackballCamera):
u"""参考
http://www.vtk.org/Wiki/VTK/Examples/Python/Interaction/MouseEvents"""
def __init__(self):
self.AddObserver('LeftButtonPressEvent', self.onLeftButtonPressEvent)
self.AddObserver('MouseMoveEvent', self.onMouseMoveEvent)
self.AddObserver('LeftButtonReleaseEvent', self.onLeftButtonReleaseEvent)
self._lastPickedActor = None
self._lastPickedProperty = vtk.vtkProperty()
self._mouseMoved = False
def lastPickedActor(self):
return self._lastPickedActor() if self._lastPickedActor else None
def onLeftButtonPressEvent(self, obj, evt):
self._mouseMoved = False
self.OnLeftButtonDown()
def onMouseMoveEvent(self, obj, evt):
self._mouseMoved = True
self.OnMouseMove()
def onLeftButtonReleaseEvent(self, obj, evt):
if not self._mouseMoved:
clickPos = self.GetInteractor().GetEventPosition()
#Pick from this location
picker = vtk.vtkPropPicker()
picker.Pick(clickPos[0], clickPos[1], 0, self.GetDefaultRenderer())
#If we picked something before, reset its property
if self.lastPickedActor():
self.lastPickedActor().GetProperty().DeepCopy(self._lastPickedProperty)
self._lastPickedActor = weakref.ref(picker.GetActor()) if picker.GetActor() else None
if self.lastPickedActor():
#Save the property of the picked actor
self._lastPickedProperty.DeepCopy(self.lastPickedActor().GetProperty())
#Highlight the picked actor
self.lastPickedActor().GetProperty().SetColor(1.0, 0.0, 0.0)
self.lastPickedActor().GetProperty().SetDiffuse(1.0)
self.lastPickedActor().GetProperty().SetSpecular(0.0)
else:
print 'No actor get pickered'
#Call parent member
self.OnLeftButtonUp()
class VTKFrame(QtGui.QFrame):
def __init__(self, parent = None):
super(VTKFrame, self).__init__(parent)
self.vl = QtGui.QVBoxLayout(self)
self.vl.setContentsMargins(0,0,0,0)
self.vtkWidget = QVTKRenderWindowInteractor(self)
self.vl.addWidget(self.vtkWidget)
self._renderer = vtk.vtkRenderer()
self.vtkWidget.GetRenderWindow().AddRenderer(self._renderer)
self.iren = self.vtkWidget.GetRenderWindow().GetInteractor()
#Create an style
self._interactorStyle = MouseInteractorActor()
self._interactorStyle.SetDefaultRenderer(self._renderer)
self.vtkWidget.SetInteractorStyle(self._interactorStyle)
self._actor1 = self.createActor1()
self._actor2 = self.createActor2()
self._renderer.AddActor(self._actor1)
self._renderer.AddActor(self._actor2)
self._renderer.ResetCamera()
self._renderer.SetBackground(.1, .2, .3)
self._initialized = False
def createActor1(self):
# Create source
polyDataPoints = vtk.vtkPoints()
polyDataPoints.InsertPoint(0, 1., 0., 0.)
polyDataPoints.InsertPoint(1, 1., 0., 10.)
polyDataPoints.InsertPoint(2, 3., 0., 10.)
polyDataPoints.InsertPoint(3, 2., 0., 0.)
polygon = vtk.vtkPolygon()
polygon.GetPointIds().SetNumberOfIds(4)
polygon.GetPointIds().SetId(0, 0)
polygon.GetPointIds().SetId(1, 1)
polygon.GetPointIds().SetId(2, 2)
polygon.GetPointIds().SetId(3, 3)
polygons = vtk.vtkCellArray()
polygons.InsertNextCell(polygon)
polyData = vtk.vtkPolyData()
polyData.SetPoints(polyDataPoints)
#polyData.SetLines(polygons)
polyData.SetPolys(polygons)
rotationalExtrusionFilter = vtk.vtkRotationalExtrusionFilter()
rotationalExtrusionFilter.SetInput(polyData)
rotationalExtrusionFilter.SetResolution(10)
rotationalExtrusionFilter.SetAngle(240)
rotationalExtrusionFilter.SetTranslation(0)
# Create a mapper
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputConnection(rotationalExtrusionFilter.GetOutputPort())
# Create an actor
actor = vtk.vtkActor()
actor.SetMapper(mapper)
#actor.GetProperty().SetColor(1.0, 0, 0)
return actor
def createActor2(self):
# Create source
source = vtk.vtkSphereSource()
source.SetCenter(0, 0, 0)
source.SetRadius(0.8)
# Create a mapper
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputConnection(source.GetOutputPort())
# Create an actor
actor = vtk.vtkActor()
actor.SetMapper(mapper)
return actor
def showEvent(self, evt):
if self._initialized:
return
self.iren.Initialize()
self._initialized = True
class MainPage(QtGui.QMainWindow):
def __init__(self, parent = None):
super(MainPage, self).__init__(parent)
self.setCentralWidget(VTKFrame())
self.setWindowTitle("Picker Example")
def categories(self):
return ['Simple', 'Picker', 'Extrusion', 'Filters']
def mainClasses(self):
return ['vtkPoints', 'vtkPolygon', 'vtkCellArray', 'vtkRotationalExtrusionFilter', 'vtkSphereSource']
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
w = MainPage()
w.show()
sys.exit(app.exec_())