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cubic interpolation

/ Published in: C++
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  1. float cubic_interpolate( float y0, float y1, float y2, float y3, float mu ) {
  2.  
  3.    float a0, a1, a2, a3, mu2;
  4.  
  5.    mu2 = mu*mu;
  6.    a0 = y3 - y2 - y0 + y1; //p
  7.    a1 = y0 - y1 - a0;
  8.    a2 = y2 - y0;
  9.    a3 = y1;
  10.  
  11.    return ( a0*mu*mu2 + a1*mu2 + a2*mu + a3 );
  12. }

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