def _draw_wireframe_display_list(self, dl): pgl.glPushAttrib(pgl.GL_ENABLE_BIT | pgl.GL_POLYGON_BIT) pgl.glPolygonMode(pgl.GL_FRONT_AND_BACK, pgl.GL_LINE) pgl.glEnable(pgl.GL_POLYGON_OFFSET_LINE) pgl.glPolygonOffset(-0.005, -50.0) pgl.glCallList(dl) pgl.glPopAttrib()