#if __VERSION__ >= 130
in vec3 nor;
out vec2 EncodedNormal;
#else
varying vec3 nor;
#define EncodedNormal gl_FragColor.xy
#endif



// from Crytek "a bit more deferred CryEngine"
vec2 EncodeNormal(vec3 n)
{
	return normalize(n.xy) * sqrt(n.z * 0.5 + 0.5);
}

void main(void)
{
	EncodedNormal = 0.5 * EncodeNormal(normalize(nor)) + 0.5;
}