fixtan - Online Linux Manual PageSection : 3
Updated : version 4.4.3
Source : Allegro
Note : Allegro manual
NAMEfixtan − Fixed point tangent of binary angles. Allegro game programming library.
SYNOPSIS#include <allegro.h> fixed fixtan(fixed x);
DESCRIPTIONThis 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);
RETURN VALUEReturns the tangent of a fixed point binary format angle. The return value will be in radians.
SEE ALSO 0
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ERROR : Need New Coding : (rof_nr_x|149|fixtan.3|23|\n", dif);| allegro_message("Precision error: %f\\n", dif);
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