x, so to linearly interpolate do....(edited out typo)..</span></div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;<span class="comment">f = 2^(x) * (y) + 2^x</span></div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;<span class="comment">= 2^x * (y + 1)</span></div><div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;<span class="comment">where x is integer part, y is fractional part</span></div><div class="line"><a nam