wxPython/demo/GLCanvas.py

   1
   2 import wx
   3
   4 try:
   5     from wx import glcanvas
   6     haveGLCanvas = True
   7 except ImportError:
   8     haveGLCanvas = False
   9
  10 try:
  11     # The Python OpenGL package can be found at
  12     # http://PyOpenGL.sourceforge.net/
  13     from OpenGL.GL import *
  14     from OpenGL.GLUT import *
  15     haveOpenGL = True
  16 except ImportError:
  17     haveOpenGL = False
  18
  19 #----------------------------------------------------------------------
  20
  21
  22 buttonDefs = {
  23     wx.NewId() : ('CubeCanvas',      'Cube'),
  24     wx.NewId() : ('ConeCanvas',      'Cone'),
  25     }
  26
  27 class ButtonPanel(wx.Panel):
  28     def __init__(self, parent, log):
  29         wx.Panel.__init__(self, parent, -1)
  30         self.log = log
  31
  32         box = wx.BoxSizer(wx.VERTICAL)
  33         box.Add((20, 30))
  34         keys = buttonDefs.keys()
  35         keys.sort()
  36         for k in keys:
  37             text = buttonDefs[k][1]
  38             btn = wx.Button(self, k, text)
  39             box.Add(btn, 0, wx.ALIGN_CENTER|wx.ALL, 15)
  40             self.Bind(wx.EVT_BUTTON, self.OnButton, btn)
  41
  42         #** Enable this to show putting a GLCanvas on the wx.Panel
  43         if 0:
  44             c = CubeCanvas(self)
  45             c.SetSize((200, 200))
  46             box.Add(c, 0, wx.ALIGN_CENTER|wx.ALL, 15)
  47
  48         self.SetAutoLayout(True)
  49         self.SetSizer(box)
  50
  51
  52     def OnButton(self, evt):
  53         if not haveGLCanvas:
  54             dlg = wx.MessageDialog(self,
  55                                    'The GLCanvas class has not been included with this build of wxPython!',
  56                                    'Sorry', wx.OK | wx.ICON_WARNING)
  57             dlg.ShowModal()
  58             dlg.Destroy()
  59
  60         elif not haveOpenGL:
  61             dlg = wx.MessageDialog(self,
  62                                    'The OpenGL package was not found.  You can get it at\n'
  63                                    'http://PyOpenGL.sourceforge.net/',
  64                                    'Sorry', wx.OK | wx.ICON_WARNING)
  65             dlg.ShowModal()
  66             dlg.Destroy()
  67
  68         else:
  69             canvasClassName = buttonDefs[evt.GetId()][0]
  70             canvasClass = eval(canvasClassName)
  71             frame = wx.Frame(None, -1, canvasClassName, size=(400,400))
  72             canvas = canvasClass(frame)
  73             frame.Show(True)
  74
  75
  76 class MyCanvasBase(glcanvas.GLCanvas):
  77     def __init__(self, parent):
  78         glcanvas.GLCanvas.__init__(self, parent, -1)
  79         self.init = False
  80         # initial mouse position
  81         self.lastx = self.x = 30
  82         self.lasty = self.y = 30
  83         self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)
  84         self.Bind(wx.EVT_SIZE, self.OnSize)
  85         self.Bind(wx.EVT_PAINT, self.OnPaint)
  86         self.Bind(wx.EVT_LEFT_DOWN, self.OnMouseDown)
  87         self.Bind(wx.EVT_LEFT_UP, self.OnMouseUp)
  88         self.Bind(wx.EVT_MOTION, self.OnMouseMotion)
  89
  90
  91     def OnEraseBackground(self, event):
  92         pass # Do nothing, to avoid flashing on MSW.
  93
  94
  95     def OnSize(self, event):
  96         size = self.GetClientSize()
  97         if self.GetContext():
  98             self.SetCurrent()
  99             glViewport(0, 0, size.width, size.height)
 100         event.Skip()
 101
 102
 103     def OnPaint(self, event):
 104         dc = wx.PaintDC(self)
 105         self.SetCurrent()
 106         if not self.init:
 107             self.InitGL()
 108             self.init = True
 109         self.OnDraw()
 110
 111
 112     def OnMouseDown(self, evt):
 113         self.CaptureMouse()
 114
 115
 116     def OnMouseUp(self, evt):
 117         self.ReleaseMouse()
 118
 119
 120     def OnMouseMotion(self, evt):
 121         if evt.Dragging() and evt.LeftIsDown():
 122             self.x, self.y = self.lastx, self.lasty
 123             self.x, self.y = evt.GetPosition()
 124             self.Refresh(False)
 125
 126
 127
 128
 129 class CubeCanvas(MyCanvasBase):
 130     def InitGL(self):
 131         # set viewing projection
 132         glMatrixMode(GL_PROJECTION);
 133         glFrustum(-0.5, 0.5, -0.5, 0.5, 1.0, 3.0);
 134
 135         # position viewer
 136         glMatrixMode(GL_MODELVIEW);
 137         glTranslatef(0.0, 0.0, -2.0);
 138
 139         # position object
 140         glRotatef(self.y, 1.0, 0.0, 0.0);
 141         glRotatef(self.x, 0.0, 1.0, 0.0);
 142
 143         glEnable(GL_DEPTH_TEST);
 144         glEnable(GL_LIGHTING);
 145         glEnable(GL_LIGHT0);
 146
 147
 148     def OnDraw(self):
 149         # clear color and depth buffers
 150         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 151
 152         # draw six faces of a cube
 153         glBegin(GL_QUADS)
 154         glNormal3f( 0.0, 0.0, 1.0)
 155         glVertex3f( 0.5, 0.5, 0.5)
 156         glVertex3f(-0.5, 0.5, 0.5)
 157         glVertex3f(-0.5,-0.5, 0.5)
 158         glVertex3f( 0.5,-0.5, 0.5)
 159
 160         glNormal3f( 0.0, 0.0,-1.0)
 161         glVertex3f(-0.5,-0.5,-0.5)
 162         glVertex3f(-0.5, 0.5,-0.5)
 163         glVertex3f( 0.5, 0.5,-0.5)
 164         glVertex3f( 0.5,-0.5,-0.5)
 165
 166         glNormal3f( 0.0, 1.0, 0.0)
 167         glVertex3f( 0.5, 0.5, 0.5)
 168         glVertex3f( 0.5, 0.5,-0.5)
 169         glVertex3f(-0.5, 0.5,-0.5)
 170         glVertex3f(-0.5, 0.5, 0.5)
 171
 172         glNormal3f( 0.0,-1.0, 0.0)
 173         glVertex3f(-0.5,-0.5,-0.5)
 174         glVertex3f( 0.5,-0.5,-0.5)
 175         glVertex3f( 0.5,-0.5, 0.5)
 176         glVertex3f(-0.5,-0.5, 0.5)
 177
 178         glNormal3f( 1.0, 0.0, 0.0)
 179         glVertex3f( 0.5, 0.5, 0.5)
 180         glVertex3f( 0.5,-0.5, 0.5)
 181         glVertex3f( 0.5,-0.5,-0.5)
 182         glVertex3f( 0.5, 0.5,-0.5)
 183
 184         glNormal3f(-1.0, 0.0, 0.0)
 185         glVertex3f(-0.5,-0.5,-0.5)
 186         glVertex3f(-0.5,-0.5, 0.5)
 187         glVertex3f(-0.5, 0.5, 0.5)
 188         glVertex3f(-0.5, 0.5,-0.5)
 189         glEnd()
 190
 191         glRotatef((self.lasty - self.y)/100., 1.0, 0.0, 0.0);
 192         glRotatef((self.lastx - self.x)/100., 0.0, 1.0, 0.0);
 193
 194         self.SwapBuffers()
 195
 196
 197
 198
 199
 200 class ConeCanvas(MyCanvasBase):
 201     def InitGL( self ):
 202         glMatrixMode(GL_PROJECTION);
 203         # camera frustrum setup
 204         glFrustum(-0.5, 0.5, -0.5, 0.5, 1.0, 3.0);
 205         glMaterial(GL_FRONT, GL_AMBIENT, [0.2, 0.2, 0.2, 1.0])
 206         glMaterial(GL_FRONT, GL_DIFFUSE, [0.8, 0.8, 0.8, 1.0])
 207         glMaterial(GL_FRONT, GL_SPECULAR, [1.0, 0.0, 1.0, 1.0])
 208         glMaterial(GL_FRONT, GL_SHININESS, 50.0)
 209         glLight(GL_LIGHT0, GL_AMBIENT, [0.0, 1.0, 0.0, 1.0])
 210         glLight(GL_LIGHT0, GL_DIFFUSE, [1.0, 1.0, 1.0, 1.0])
 211         glLight(GL_LIGHT0, GL_SPECULAR, [1.0, 1.0, 1.0, 1.0])
 212         glLight(GL_LIGHT0, GL_POSITION, [1.0, 1.0, 1.0, 0.0]);
 213         glLightModel(GL_LIGHT_MODEL_AMBIENT, [0.2, 0.2, 0.2, 1.0])
 214         glEnable(GL_LIGHTING)
 215         glEnable(GL_LIGHT0)
 216         glDepthFunc(GL_LESS)
 217         glEnable(GL_DEPTH_TEST)
 218         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
 219         # position viewer
 220         glMatrixMode(GL_MODELVIEW);
 221
 222
 223     def OnDraw(self):
 224         # clear color and depth buffers
 225         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 226         # use a fresh transformation matrix
 227         glPushMatrix()
 228         # position object
 229         glTranslate(0.0, 0.0, -2.0);
 230         glRotate(30.0, 1.0, 0.0, 0.0);
 231         glRotate(30.0, 0.0, 1.0, 0.0);
 232
 233         glTranslate(0, -1, 0)
 234         glRotate(250, 1, 0, 0)
 235         glutSolidCone(0.5, 1, 30, 5)
 236         glPopMatrix()
 237         glRotatef((self.lasty - self.y)/100., 0.0, 0.0, 1.0);
 238         glRotatef(0.0, (self.lastx - self.x)/100., 1.0, 0.0);
 239         # push into visible buffer
 240         self.SwapBuffers()
 241
 242
 243
 244
 245 #----------------------------------------------------------------------
 246
 247
 248 def runTest(frame, nb, log):
 249     win = ButtonPanel(nb, log)
 250     return win
 251
 252
 253
 254
 255
 256
 257 overview = """\
 258 """
 259
 260
 261
 262 if __name__ == '__main__':
 263     import sys,os
 264     import run
 265     run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
 266
 267
 268
 269
 270 #----------------------------------------------------------------------
 271