Function FixCos

fix/fix.cpp:116–126

Returns the cosine of the given angle. Linearly interpolates between two entries in a 256-entry table

// Returns the cosine of the given angle.  Linearly interpolates between two entries in a 256-entry table
float FixCos(angle a) {
  int i, f;
  float c0, c1;

  i = (a >> 8) & 0xff;
  f = a & 0xff;

  c0 = sincos_table[i + 64];
  c1 = sincos_table[i + 64 + 1];
  return (float)(c0 + ((c1 - c0) * (double)f / 256.0));
}

// Returns the sine of the given angle, but does no interpolation
float FixSinFast(angle a) {