#ifdef USE_LOGDEPTHBUF

	#ifdef USE_LOGDEPTHBUF_EXT

		vFragDepth = 1.0 + gl_Position.w;

	#else

		gl_Position.z = log2( max( EPSILON, gl_Position.w + 1.0 ) ) * logDepthBufFC - 1.0;

		gl_Position.z *= gl_Position.w;

	#endif

#endif