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#------------------------------------------------------------------------------
# This file is part of the OpenStructure project <www.openstructure.org>
#
# Copyright (C) 2008-2020 by the OpenStructure authors
#
# This library is free software; you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation; either version 3.0 of the License, or (at your option)
# any later version.
# This library is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#------------------------------------------------------------------------------
import traceback
from ._ost_gfx import *
class PyGfxObj(GfxObj):
def __init__(self,name):
"""
requires a unique name not yet utilized in the Scene;
do not place OpenGL calls in the ctor, use InitGL for
that purpose
"""
GfxObj.__init__(self,name)
self._valid_flag=False
def _InitGL(self):
try:
self.InitGL()
self._valid_flag=True
except:
traceback.print_exc()
def InitGL(self):
"""
called once for each OpenGL context (usually one time),
allows one-time OpenGL initialization to be implemented,
such as vbo allocation
"""
pass
def _CustomPreRenderGL(self,rebuild):
if not self._valid_flag:
return
try:
self.CustomPreRenderGL(rebuild)
except:
self._valid_flag=False
traceback.print_exc()
def CustomPreRenderGL(self,rebuild):
"""
called just before CustomRenderGL is called; the flag
indicates that a rebuild is required or was requested
"""
pass
def _CustomRenderGL(self,render_pass):
if not self._valid_flag:
return
try:
self.CustomRenderGL(render_pass)
except:
self._valid_flag=False
traceback.print_exc()
def CustomRenderGL(self,render_pass):
"""
called for each scene refresh
"""
pass
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