Allow preventing glpanel from setting up lights

This is probably a good call for the future... Changing lights in
glpanel/gcview won't break stlview anymore

printrun/gl/panel.py

@@ -45,6 +45,7 @@ class wxGLPanel(wx.Panel):
 
     orthographic = True
     color_background = (0.98, 0.98, 0.78, 1)
+    do_lights = True
 
     def __init__(self, parent, id, pos = wx.DefaultPosition,
                  size = wx.DefaultSize, style = 0,
@@ -172,6 +173,8 @@ class wxGLPanel(wx.Panel):
             self.update_object_resize()
 
     def setup_lights(self):
+        if not self.do_lights:
+            return
         glEnable(GL_LIGHTING)
         glDisable(GL_LIGHT0)
         glLightfv(GL_LIGHT0, GL_AMBIENT, vec(0.4, 0.4, 0.4, 1.0))

printrun/stlview.py

@@ -57,6 +57,8 @@ class stlview(object):
 
 class StlViewPanel(wxGLPanel):
 
+    do_lights = False
+
     def __init__(self, parent, size, id = wx.ID_ANY,
                  build_dimensions = None, circular = False):
         super(StlViewPanel, self).__init__(parent, id, wx.DefaultPosition, size, 0)
@@ -109,7 +111,6 @@ class StlViewPanel(wxGLPanel):
         glEnable(GL_LIGHTING)
         glEnable(GL_LIGHT0)
         glEnable(GL_LIGHT1)
-        glDisable(GL_LIGHT2)
 
         glLightfv(GL_LIGHT0, GL_POSITION, vec(.5, .5, 1, 0))
         glLightfv(GL_LIGHT0, GL_SPECULAR, vec(.5, .5, 1, 1))
@@ -117,6 +118,7 @@ class StlViewPanel(wxGLPanel):
         glLightfv(GL_LIGHT1, GL_POSITION, vec(1, 0, .5, 0))
         glLightfv(GL_LIGHT1, GL_DIFFUSE, vec(.5, .5, .5, 1))
         glLightfv(GL_LIGHT1, GL_SPECULAR, vec(1, 1, 1, 1))
+        glShadeModel(GL_SMOOTH)
 
         glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, vec(0.5, 0, 0.3, 1))
         glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, vec(1, 1, 1, 1))