a3cee65ed4
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41077 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
570 lines
17 KiB
Python
570 lines
17 KiB
Python
"""
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VTK is now including a package for using VTK with wxPython, so this
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module is now officially nothing but ancient history. If for some
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strange reason you really need this code (I don't know why, it didn't
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work all that well anyway,) then just remove the triple quotes below.
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I'm told that the module from Kitware is excellent and so you should
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really use it. See the URL below to get a copy from CVS.
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http://public.kitware.com/cgi-bin/cvsweb.cgi/VTK/Wrapping/Python/vtk/wx/
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"""
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print __doc__
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'''
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#----------------------------------------------------------------------
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# Name: wxPython.lib.vtk
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# Purpose: Provides a wrapper around the vtkRenderWindow from the
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# VTK Visualization Toolkit. Requires the VTK Python
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# extensions from http://www.kitware.com/
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#
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# Author: Robin Dunn
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#
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# Created: 16-Nov-1999
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# RCS-ID: $Id$
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# Copyright: (c) 1999 by Total Control Software
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# Licence: wxWindows license
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#----------------------------------------------------------------------
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# This class has been rewritten and improved by Prabhu Ramachandran
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# <prabhu@aero.iitm.ernet.in>. It has been tested under Win32 and
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# Linux. Many thanks to Eric Boix <frog@creatis.insa-lyon.fr> for
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# testing it under Windows and finding and fixing many errors.
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# Thanks also to Sebastien BARRE <sebastien@barre.nom.fr> for his
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# suggestions.
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try:
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from vtkpython import *
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except ImportError:
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raise ImportError, "VTK extension module not found"
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from wxPython.wx import *
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import math
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#----------------------------------------------------------------------
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DEBUG = 0
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def debug(msg):
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if DEBUG:
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print msg
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class wxVTKRenderWindowBase(wxWindow):
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"""
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A base class that enables one to embed a vtkRenderWindow into
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a wxPython widget. This class embeds the RenderWindow correctly
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under different platforms. Provided are some empty methods that
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can be overloaded to provide a user defined interaction behaviour.
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The event handling functions have names that are similar to the
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ones in the vtkInteractorStyle class included with VTK.
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"""
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def __init__(self, parent, id, position=wxDefaultPosition,
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size=wxDefaultSize, style=0):
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wxWindow.__init__(self, parent, id, position, size, style | wxWANTS_CHARS)
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self._RenderWindow = vtkRenderWindow()
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self.__InExpose = 0
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self.__Created = 0
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if wxPlatform != '__WXMSW__':
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# We can't get the handle in wxGTK until after the widget
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# is created, the window create event happens later so we'll
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# catch it there
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EVT_WINDOW_CREATE(self, self.OnCreateWindow)
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EVT_PAINT (self, self.OnExpose)
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else:
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# but in MSW, the window create event happens durring the above
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# call to __init__ so we have to do it here.
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hdl = self.GetHandle()
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self._RenderWindow.SetWindowInfo(str(hdl))
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EVT_PAINT (self, self.OnExpose)
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self.__Created = 1
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# common for all platforms
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EVT_SIZE (self, self.OnConfigure)
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# setup the user defined events.
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self.SetupEvents()
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def SetupEvents(self):
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"Setup the user defined event bindings."
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# Remember to bind everything to self.box and NOT self
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EVT_LEFT_DOWN (self, self.OnLeftButtonDown)
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EVT_MIDDLE_DOWN (self, self.OnMiddleButtonDown)
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EVT_RIGHT_DOWN (self, self.OnRightButtonDown)
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EVT_LEFT_UP (self, self.OnLeftButtonUp)
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EVT_MIDDLE_UP (self, self.OnMiddleButtonUp)
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EVT_RIGHT_UP (self, self.OnRightButtonUp)
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EVT_MOTION (self, self.OnMouseMove)
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EVT_ENTER_WINDOW (self, self.OnEnter)
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EVT_LEAVE_WINDOW (self, self.OnLeave)
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EVT_CHAR (self, self.OnChar)
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# Add your bindings if you want them in the derived class.
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def GetRenderer(self):
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self._RenderWindow.GetRenderers().InitTraversal()
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return self._RenderWindow.GetRenderers().GetNextItem()
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def GetRenderWindow(self):
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return self._RenderWindow
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def Render(self):
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if self.__Created:
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# if block needed because calls to render before creation
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# will prevent the renderwindow from being embedded into a
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# wxPython widget.
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self._RenderWindow.Render()
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def OnExpose(self, event):
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# I need this for the MDIDemo. Somehow OnCreateWindow was
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# not getting called.
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if not self.__Created:
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self.OnCreateWindow(event)
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if (not self.__InExpose):
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self.__InExpose = 1
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dc = wxPaintDC(self)
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self._RenderWindow.Render()
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self.__InExpose = 0
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def OnCreateWindow(self, event):
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hdl = self.GetHandle()
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try:
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self._RenderWindow.SetParentInfo(str(hdl))
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except:
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self._RenderWindow.SetWindowInfo(str(hdl))
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msg = "Warning:\n "\
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"Unable to call vtkRenderWindow.SetParentInfo\n\n"\
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"Using the SetWindowInfo method instead. This\n"\
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"is likely to cause a lot of flicker when\n"\
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"rendering in the vtkRenderWindow. Please\n"\
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"use a recent Nightly VTK release (later than\n"\
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"March 10 2001) to eliminate this problem."
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dlg = wxMessageDialog(NULL, msg, "Warning!",
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wxOK |wxICON_INFORMATION)
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dlg.ShowModal()
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dlg.Destroy()
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self.__Created = 1
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def OnConfigure(self, event):
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sz = self.GetSize()
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self.SetSize(sz)
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# Ugly hack that according to Eric Boix is necessary under
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# Windows. If possible Try commenting this out and test under
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# Windows.
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#self._RenderWindow.GetSize()
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#
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self._RenderWindow.SetSize(sz.width, sz.height)
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def OnLeftButtonDown(self, event):
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"Left mouse button pressed."
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pass
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def OnMiddleButtonDown(self, event):
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"Middle mouse button pressed."
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pass
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def OnRightButtonDown(self, event):
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"Right mouse button pressed."
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pass
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def OnLeftButtonUp(self, event):
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"Left mouse button released."
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pass
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def OnMiddleButtonUp(self, event):
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"Middle mouse button released."
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pass
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def OnRightButtonUp(self, event):
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"Right mouse button released."
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pass
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def OnMouseMove(self, event):
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"Mouse has moved."
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pass
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def OnEnter(self, event):
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"Entering the vtkRenderWindow."
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pass
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def OnLeave(self, event):
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"Leaving the vtkRenderWindow."
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pass
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def OnChar(self, event):
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"Process Key events."
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pass
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def OnKeyDown(self, event):
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"Key pressed down."
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pass
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def OnKeyUp(self, event):
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"Key released."
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pass
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class wxVTKRenderWindow(wxVTKRenderWindowBase):
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"""
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An example of a fully functional wxVTKRenderWindow that is
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based on the vtkRenderWidget.py provided with the VTK sources.
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"""
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def __init__(self, parent, id, position=wxDefaultPosition,
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size=wxDefaultSize, style=0):
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wxVTKRenderWindowBase.__init__(self, parent, id, position, size,
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style)
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self._CurrentRenderer = None
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self._CurrentCamera = None
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self._CurrentZoom = 1.0
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self._CurrentLight = None
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self._ViewportCenterX = 0
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self._ViewportCenterY = 0
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self._Picker = vtkCellPicker()
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self._PickedAssembly = None
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self._PickedProperty = vtkProperty()
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self._PickedProperty.SetColor(1,0,0)
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self._PrePickedProperty = None
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self._OldFocus = None
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# these record the previous mouse position
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self._LastX = 0
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self._LastY = 0
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def OnLeftButtonDown(self, event):
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"Left mouse button pressed."
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self.StartMotion(event)
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def OnMiddleButtonDown(self, event):
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"Middle mouse button pressed."
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self.StartMotion(event)
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def OnRightButtonDown(self, event):
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"Right mouse button pressed."
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self.StartMotion(event)
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def OnLeftButtonUp(self, event):
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"Left mouse button released."
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self.EndMotion(event)
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def OnMiddleButtonUp(self, event):
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"Middle mouse button released."
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self.EndMotion(event)
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def OnRightButtonUp(self, event):
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"Right mouse button released."
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self.EndMotion(event)
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def OnMouseMove(self, event):
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event.x, event.y = event.GetPositionTuple()
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if event.LeftIsDown():
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if event.ShiftDown():
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self.Pan(event.x, event.y)
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else:
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self.Rotate(event.x, event.y)
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elif event.MiddleIsDown():
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self.Pan(event.x, event.y)
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elif event.RightIsDown():
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self.Zoom(event.x, event.y)
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def OnEnter(self, event):
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self.__OldFocus = wxWindow_FindFocus()
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self.SetFocus()
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x, y = event.GetPositionTuple()
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self.UpdateRenderer(x,y)
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def OnLeave(self, event):
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if (self._OldFocus != None):
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self.__OldFocus.SetFocus()
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def OnChar(self, event):
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key = event.GetKeyCode()
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if (key == ord('r')) or (key == ord('R')):
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self.Reset()
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elif (key == ord('w')) or (key == ord('W')):
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self.Wireframe()
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elif (key == ord('s')) or (key == ord('S')):
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self.Surface()
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elif (key == ord('p')) or (key == ord('P')):
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x, y = event.GetPositionTuple()
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self.PickActor(x, y)
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else:
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event.Skip()
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# Start of internal functions
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def GetZoomFactor(self):
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return self._CurrentZoom
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def SetZoomFactor(self, zf):
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self._CurrentZoom = zf
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def GetPicker(self):
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return self._Picker
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def Render(self):
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if (self._CurrentLight):
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light = self._CurrentLight
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light.SetPosition(self._CurrentCamera.GetPosition())
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light.SetFocalPoint(self._CurrentCamera.GetFocalPoint())
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wxVTKRenderWindowBase.Render(self)
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def UpdateRenderer(self, x, y):
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"""
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UpdateRenderer will identify the renderer under the mouse and set
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up _CurrentRenderer, _CurrentCamera, and _CurrentLight.
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"""
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sz = self.GetSize()
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windowX = sz.width
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windowY = sz.height
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renderers = self._RenderWindow.GetRenderers()
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numRenderers = renderers.GetNumberOfItems()
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self._CurrentRenderer = None
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renderers.InitTraversal()
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for i in range(0,numRenderers):
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renderer = renderers.GetNextItem()
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vx,vy = (0,0)
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if (windowX > 1):
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vx = float (x)/(windowX-1)
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if (windowY > 1):
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vy = (windowY-float(y)-1)/(windowY-1)
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(vpxmin,vpymin,vpxmax,vpymax) = renderer.GetViewport()
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if (vx >= vpxmin and vx <= vpxmax and
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vy >= vpymin and vy <= vpymax):
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self._CurrentRenderer = renderer
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self._ViewportCenterX = float(windowX)*(vpxmax-vpxmin)/2.0\
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+vpxmin
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self._ViewportCenterY = float(windowY)*(vpymax-vpymin)/2.0\
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+vpymin
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self._CurrentCamera = self._CurrentRenderer.GetActiveCamera()
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lights = self._CurrentRenderer.GetLights()
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lights.InitTraversal()
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self._CurrentLight = lights.GetNextItem()
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break
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self._LastX = x
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self._LastY = y
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def GetCurrentRenderer(self):
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return self._CurrentRenderer
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def StartMotion(self, event):
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x, y = event.GetPositionTuple()
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self.UpdateRenderer(x,y)
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self.CaptureMouse()
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def EndMotion(self, event=None):
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if self._CurrentRenderer:
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self.Render()
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self.ReleaseMouse()
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def Rotate(self,x,y):
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if self._CurrentRenderer:
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self._CurrentCamera.Azimuth(self._LastX - x)
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self._CurrentCamera.Elevation(y - self._LastY)
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self._CurrentCamera.OrthogonalizeViewUp()
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self._LastX = x
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self._LastY = y
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self._CurrentRenderer.ResetCameraClippingRange()
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self.Render()
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def PanAbsolute(self, x_vec, y_vec):
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if self._CurrentRenderer:
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renderer = self._CurrentRenderer
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camera = self._CurrentCamera
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(pPoint0,pPoint1,pPoint2) = camera.GetPosition()
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(fPoint0,fPoint1,fPoint2) = camera.GetFocalPoint()
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if (camera.GetParallelProjection()):
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renderer.SetWorldPoint(fPoint0,fPoint1,fPoint2,1.0)
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renderer.WorldToDisplay()
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fx,fy,fz = renderer.GetDisplayPoint()
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renderer.SetDisplayPoint(fx+x_vec,
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fy+y_vec,
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fz)
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renderer.DisplayToWorld()
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fx,fy,fz,fw = renderer.GetWorldPoint()
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camera.SetFocalPoint(fx,fy,fz)
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renderer.SetWorldPoint(pPoint0,pPoint1,pPoint2,1.0)
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renderer.WorldToDisplay()
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fx,fy,fz = renderer.GetDisplayPoint()
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renderer.SetDisplayPoint(fx+x_vec,
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fy+y_vec,
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fz)
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renderer.DisplayToWorld()
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fx,fy,fz,fw = renderer.GetWorldPoint()
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camera.SetPosition(fx,fy,fz)
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else:
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(fPoint0,fPoint1,fPoint2) = camera.GetFocalPoint()
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# Specify a point location in world coordinates
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renderer.SetWorldPoint(fPoint0,fPoint1,fPoint2,1.0)
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renderer.WorldToDisplay()
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# Convert world point coordinates to display coordinates
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dPoint = renderer.GetDisplayPoint()
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focalDepth = dPoint[2]
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aPoint0 = self._ViewportCenterX + x_vec
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aPoint1 = self._ViewportCenterY + y_vec
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renderer.SetDisplayPoint(aPoint0,aPoint1,focalDepth)
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renderer.DisplayToWorld()
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(rPoint0,rPoint1,rPoint2,rPoint3) = renderer.GetWorldPoint()
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if (rPoint3 != 0.0):
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rPoint0 = rPoint0/rPoint3
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rPoint1 = rPoint1/rPoint3
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rPoint2 = rPoint2/rPoint3
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camera.SetFocalPoint((fPoint0 - rPoint0) + fPoint0,
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(fPoint1 - rPoint1) + fPoint1,
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(fPoint2 - rPoint2) + fPoint2)
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camera.SetPosition((fPoint0 - rPoint0) + pPoint0,
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(fPoint1 - rPoint1) + pPoint1,
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(fPoint2 - rPoint2) + pPoint2)
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self.Render()
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def Pan(self, x, y):
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self.PanAbsolute(x - self._LastX, - y + self._LastY)
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self._LastX = x
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self._LastY = y
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def Zoom(self,x,y):
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if self._CurrentRenderer:
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renderer = self._CurrentRenderer
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camera = self._CurrentCamera
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zoomFactor = math.pow(1.02,(0.5*(self._LastY - y)))
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self._CurrentZoom = self._CurrentZoom * zoomFactor
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if camera.GetParallelProjection():
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parallelScale = camera.GetParallelScale()/zoomFactor
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camera.SetParallelScale(parallelScale)
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else:
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camera.Dolly(zoomFactor)
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renderer.ResetCameraClippingRange()
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self._LastX = x
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self._LastY = y
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self.Render()
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def Reset(self):
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if self._CurrentRenderer:
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self._CurrentRenderer.ResetCamera()
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self.Render()
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def Wireframe(self):
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actors = self._CurrentRenderer.GetActors()
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numActors = actors.GetNumberOfItems()
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actors.InitTraversal()
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for i in range(0,numActors):
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actor = actors.GetNextItem()
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actor.GetProperty().SetRepresentationToWireframe()
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self.Render()
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def Surface(self):
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actors = self._CurrentRenderer.GetActors()
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numActors = actors.GetNumberOfItems()
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actors.InitTraversal()
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for i in range(0,numActors):
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actor = actors.GetNextItem()
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actor.GetProperty().SetRepresentationToSurface()
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self.Render()
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def PickActor(self,x,y):
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if self._CurrentRenderer:
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renderer = self._CurrentRenderer
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picker = self._Picker
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windowY = self.GetSize().height
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picker.Pick(x,(windowY - y - 1),0.0,renderer)
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assembly = picker.GetAssembly()
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if (self._PickedAssembly != None and
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self._PrePickedProperty != None):
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self._PickedAssembly.SetProperty(self._PrePickedProperty)
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# release hold of the property
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self._PrePickedProperty.UnRegister(self._PrePickedProperty)
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self._PrePickedProperty = None
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if (assembly != None):
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self._PickedAssembly = assembly
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self._PrePickedProperty = self._PickedAssembly.GetProperty()
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# hold onto the property
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self._PrePickedProperty.Register(self._PrePickedProperty)
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|
self._PickedAssembly.SetProperty(self._PickedProperty)
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|
|
|
self.Render()
|
|
'''
|