/// disable depth testing
    glDisable(GL_DEPTH_TEST);

	// disable modification of all color components
    glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);

    // enable stencil testing
    glEnable(GL_STENCIL_TEST);

	// setup the stencil buffer for a function reference value
    glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
    glStencilFunc(GL_ALWAYS, 1, 1);

    // draw the floor; this will set the floor pixels in the stencil buffer
	// to 1, since we defined 1 as the mask value with the glStencilFunc() command
    DrawFloor();

    // enable modification of all color components
    glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);

	// enable depth testing
    glEnable(GL_DEPTH_TEST);

   // make it so we can only render where the stencil buffer is equal to 1
    glStencilFunc(GL_EQUAL, 1, 1);
    glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);

	// draw "reflection"
	glPushMatrix();

        // reflect (invert) the torus
        glScalef(1.0, -1.0, 1.0);

		// eliminate front of polygons from drawing
        glCullFace(GL_FRONT);

		// draw the reflected torus
        DrawTorus();

        // re-enable backface culling
        glCullFace(GL_BACK);
    glPopMatrix();

	// disable stencil testing
	glDisable(GL_STENCIL_TEST);

// draw floor with 40% blending so we can see the "reflection"
    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	glColor4f(1.0f, 1.0f, 1.0f, 0.4f);
    DrawFloor();
    glDisable(GL_BLEND);

	// draw the "real" torus
	DrawTorus();

	glFlush();
	SwapBuffers(g_HDC);			// bring backbuffer to foreground

[\code]