al_fixtan3alleg5
Allegro 5 api
Usage
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#include <allegro5/allegro.h> al_fixed al_fixtan(al_fixed x);
Overview
This function finds the tangent of a value using a lookup table. The input value must be a fixed point binary angle.
Example:
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al_fixed angle, res_a, res_b; float dif; angle = al_itofix(37); /* Prove that tan(angle) == sin(angle) / cos(angle). */ res_a = al_fixdiv(al_fixsin(angle), al_fixcos(angle)); res_b = al_fixtan(angle); dif = al_fixtof(al_fixsub(res_a, res_b)); printf("Precision error: %f\n", dif);
Return value
Returns the tangent of a fixed point binary format angle as a fixed point value.
Releases
6 releases since Debian 8 (Jessie); the text changed 5 times.