Function discardFragments

OpenCSG/src/renderGoldfeather.cpp:272–287

        }

        void discardFragments(const Batch& batch, int parity, int mask) {
            glDepthFunc(GL_ALWAYS);
            glDepthMask(GL_TRUE);
            glDepthRange(1.0, 1.0);
            glStencilMask(mask);
            glStencilFunc(GL_NOTEQUAL, parity, mask);
            glStencilOp(GL_ZERO, GL_ZERO, GL_ZERO);
            channelMgr->renderToChannel(true);
            glColor4ub(0, 0, 0, 0);

            touchFragments(batch);

            glDepthRange(0.0, 1.0);
            glDepthMask(GL_FALSE);
            glDepthFunc(getParityDepthFunc());
        }

        void discardFragments(int parity, int mask) {
            glDepthFunc(GL_ALWAYS);