1al_fixtan(3)                                                      al_fixtan(3)
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NAME

6       al_fixtan - Allegro 5 API
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SYNOPSIS

9              #include <allegro5/allegro.h>
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11              al_fixed al_fixtan(al_fixed x);
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DESCRIPTION

14       This  function  finds the tangent of a value using a lookup table.  The
15       input value must be a fixed point binary angle.
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17       Example:
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19              al_fixed angle, res_a, res_b;
20              float dif;
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22              angle = al_itofix(37);
23              /* Prove that tan(angle) == sin(angle) / cos(angle). */
24              res_a = al_fixdiv(al_fixsin(angle), al_fixcos(angle));
25              res_b = al_fixtan(angle);
26              dif = al_fixtof(al_fixsub(res_a, res_b));
27              printf("Precision error: %f\n", dif);
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RETURN VALUE

30       Returns the tangent of a fixed point binary format  angle  as  a  fixed
31       point value.
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35Allegro reference manual                                          al_fixtan(3)
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