Method find

OpenCSG/src/channelManager.cpp:257–275

    }

    Channel ChannelManager::find() const {

        Channel channel = NoChannel;

        // find free channel
        if ((mOccupiedChannels & Alpha) == 0) {
            channel = Alpha;
        }  else if (OPENCSG_HAS_EXT(ARB_texture_env_dot3) || GLAD_GL_VERSION_1_3) {
            if ((mOccupiedChannels & Red) == 0)   {
                channel = Red;
            } else if ((mOccupiedChannels & Green) == 0) {
                channel = Green;
            } else if ((mOccupiedChannels & Blue) == 0)  {
                channel = Blue;
            }
        }

        return channel;
    }

    Channel ChannelManager::request() {
        if (!mInOffscreenBuffer) {