Fixed point tangent of binary angles.


This function finds the tangent of a value using a lookup table. The input value must be a fixed point binary angle. Example:
      fixed angle, res_a, res_b;
      float dif;

angle = itofix(37); /* Prove that tan(angle) == sin(angle) / cos(angle). */ res_a = fixdiv(fixsin(angle), fixcos(angle)); res_b = fixtan(angle); dif = fixtof(fixsub(res_a, res_b)); allegro_message("Precision error: %f\n", dif);
Returns the tangent of a fixed point binary format angle. The return value will be in radians.
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