float4 pack(float f, int iRange) 
{
	float4 fReturn = 0.0f;
	float fRange = iRange * 1.0f;
	int i = (int) (f * iRange);
	fReturn.r = i / fRange;
	f = (f - fReturn.r) * fRange;
	i = (int) (f * iRange);
	fReturn.g = i / fRange;
	f = (f - fReturn.g) * fRange;
	i = (int) (f * iRange);
	fReturn.b = i / fRange;
	fReturn.a = 0.0f;
	return fReturn;
}

float unpack(float4 f, int iRange)
{
	float fRange = iRange * 1.0f;
	return f.r + f.g / fRange + f.b / (fRange * fRange);
}