Function FixSin

fix/fix.cpp:103–113

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

// Returns the sine of the given angle.  Linearly interpolates between two entries in a 256-entry table
float FixSin(angle a) {
  int i, f;
  float s0, s1;

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

  s0 = sincos_table[i];
  s1 = sincos_table[i + 1];
  return (float)(s0 + ((s1 - s0) * (double)f / 256.0));
}

// Returns the cosine of the given angle.  Linearly interpolates between two entries in a 256-entry table
float FixCos(angle a) {